Categories: Flanges

Threaded Flanges

Understanding your choice of threaded flanges options

At Guanxin, we will help you understand the different options available regarding threaded flanges and how to choose the right option for your piping system.
Choosing the right screwed flanges for your piping system ensures a secure and reliable connection between pipes, valves, and other components. By understanding the different types of threaded flanges, materials, and size and pressure ratings available, you can make an informed decision that meets the specific requirements of your piping system.

What is a threaded flange?

Threaded flange is a non-welded flange with the inner hole of the flange machined into the pipe thread and matched with the pipe with thread to achieve the connection. Threaded flanges, also known as screwed flanges, are widely used in low-pressure piping systems. We recommend not to use threaded flanges in conditions where the pipe temperature changes sharply or where the temperature is higher than 20°C and lower than -45°C to avoid leakage. Considering the structural characteristics of threaded flanges, they are therefore unsuitable for use in flammable/explosive and highly and extremely hazardous situations. Nuclear pressure is small, such as air conditioning, water system, etc., is safe to use.

Advantages and Disadvantages of threaded flanges

Advantages of TH Flanges
1. Easy Installation and Removal
Threaded flanges are a popular choice in many industries due to their easy installation and removal. These flanges can be screwed onto pipes without the need for welding, which simplifies the process and reduces labor costs. This feature makes threaded flanges an ideal solution for temporary connections or systems that require frequent maintenance and inspection.
2. High Pressure Tolerance
Threaded flanges can withstand high pressure, making them suitable for use in high-pressure systems such as steam, water, and gas lines. Their robust design ensures that they can handle the stress and pressure associated with these demanding applications.
3. Versatility
Threaded flanges are compatible with a wide range of pipe materials, including stainless steel, carbon steel, and various alloys. This compatibility allows them to be used in various industries, such as oil and gas, petrochemical, power generation, and more.
4. Leak-Proof Connections
When properly installed, threaded flanges create leak-proof connections. This ensures the safety and efficiency of the system, minimizing the risk of leaks and potential environmental hazards.
Disadvantages of TH Flanges
1. Limitations in High-Temperature Applications
Threaded flanges have limitations when it comes to high-temperature applications. As the temperature increases, the threads can become weakened, causing potential leaks or system failure. Therefore, they are not recommended for use in systems where extreme temperatures are present.
2. Difficulty in Alignment
Aligning threaded flanges can be challenging, especially for larger pipe sizes. Proper alignment is crucial for the effective sealing of the connection, and any misalignment can lead to leaks or system failure.
3. Potential for Galling
Threaded flanges can be prone to galling, a type of wear that occurs between sliding metal surfaces. Galling can damage the threads, making it difficult to remove or replace the flange. To prevent galling, it’s essential to use proper lubrication and thread materials.

Types of threaded flanges

There are four different types of threaded flanges, including NPT, BSPT, metric, and UN/UNF threaded flanges.

Screwed Flange Type	Standard	Thread Design	Typical Applications
NPT threaded flanges	National Pipe Thread	Tapered	Oil and gas, chemical, power generation
BSPT threaded flanges	British Standard Pipe Thread	Tapered	Water treatment, petrochemical, pharmaceutical
Metric threaded flanges	International System of Units (SI)	Various	Chemical processing, power generation, food and beverage
UN/UNF threaded flanges	Unified National/Unified National Fine	Straight	Aerospace, automotive, heavy machinery manufacturing

The table above compares the four types of threaded flanges discussed in this article: NPT, BSPT, Metric, and UN/UNF. Each flange type is based on a specific standard, has a unique thread design, and is typically used for different industry applications. Understanding these differences is critical to selecting the right threaded flange for a particular application and ensuring safe and reliable connections in piping systems.

How to Measure a threaded flange?

To accurately measure the dimensions of a threaded flange, follow the steps outlined below:

1. Flange Diameter (O):

Place a measuring tape or ruler across the flange, measuring from one edge to the opposite edge, passing through the center. This is the overall diameter of the flange, which is commonly referred to as ‘O.’

2. Flange Thickness (Q):

Measure the thickness of the flange by placing a measuring tape or caliper perpendicular to the face of the flange. The distance from one face to the other is the flange thickness, denoted as ‘Q.’

3. Hub Diameter at Base (X):

The hub diameter at the base, or ‘X,’ is the diameter of the flange’s neck. Measure the widest part of the flange’s neck using a measuring tape or caliper, ensuring that the tool is perpendicular to the axis of the flange.

4. Raised Face Diameter (RF):

For flanges with a raised face, measure the diameter of the raised face by placing a measuring tape or ruler across the face of the flange. Ensure that the measuring tool passes through the center of the flange and measures from one edge of the raised face to the other.

5. Diameter of Bolt Circle (BC):

The diameter of the bolt circle, or ‘BC,’ is the diameter of the circle that passes through the center of all bolt holes on the flange. To measure this, place a measuring tape or ruler across the bolt holes, passing through the center of the flange, and measure from one bolt hole to the opposite bolt hole.

6. Length Through Hub (L):

The length through the hub, or ‘L,’ is the distance between the flange face and the end of the hub or neck. Measure this length by placing a measuring tape or ruler along the axis of the flange, from the face to the end of the hub or neck.

7. Thread Length (T):

Finally, to measure the thread length or ‘T,’ insert a depth gauge or similar tool into the threaded portion of the flange, measuring the distance from the beginning of the threads to the deepest point.

Standard for threaded flanges

American National Standards Institute (ANSI) B16.5
American Society of Mechanical Engineers (ASME) B16.5
American Petroleum Institute (API) Standard 605
International Organization for Standardization (ISO) 7005

The design and manufacturing of TH flanges are governed by the following standards:

ANSI B16.5 TH Flange
DIN TH Flange
EN 1092-1 TH Flange
BS 4504 TH Flange
UNI TH Flange
SANS 1123 TH Flange
GOST/ГОСТ 33259 TH Flange
ANSI B16.47 TH Flange
JIS B2220 TH Flange
KOREA TH Flange
BS 10 TH Flange
AWWA C207 TH Flange
ISO TH Flange
MSZ TH Flange
Australian TH Flange
French NFE TH Flange
Norwegian NS TH Flange

Materials of threaded flanges

Depending on the specific application requirements, threaded flanges are made from a variety of metal materials, including:

Titanium threaded flange	ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7, ASTM R50250/GR.1\| R50400/GR.2 \| R50550/GR.3 \| R50700/GR.4 \| GR.6 \|R52400/GR.7 \| R53400/GR.12 \| R56320/GR.9 \|R56400/GR.5
Copper threaded flange	T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel threaded flange	ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Carbon Steel threaded flange	ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel threaded flange	ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel threaded flange	ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Hastelloy threaded flange	ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X
Brass threaded flange	3602 / 2604 / H59 / H62 / etc.
Inconel threaded flange	ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750
Monel threaded flange	ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Duplex threaded flange	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex threaded flange	S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Alloy 20 threaded flange	ASTM B462 / ASME SB462, Carpenter 20 Alloy, Alloy 20Cb-3
Aluminium threaded flange	5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel threaded flange	ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Nimonic threaded flange	Nimonic 75, Nimonic 80A, Nimonic 90
Other threaded flange material	Tin bronze, Aluminum bronze, Lead bronze
Incoloy threaded flange	ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925
254 Smo threaded flange	ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547

Selecting the Right Threaded Flange Material

Material selection is crucial when choosing threaded flanges for your piping system. Factors to consider include corrosion resistance, temperature, and pressure requirements. Common materials used for threaded flanges include:
Carbon Steel: Offers excellent strength and durability, making it suitable for high-pressure applications.
Stainless Steel: Provides outstanding corrosion resistance, making it ideal for use in harsh environments or applications where chemical compatibility is essential.
Alloy Steel: Delivers enhanced resistance to heat and corrosion, making it suitable for high-temperature and high-pressure environments.
Nickel Alloys: Offer superior corrosion and heat resistance, as well as excellent mechanical properties, making them suitable for use in demanding applications such as aerospace, power generation, and petrochemical industries.

Dimensions of threaded flanges

Several key dimensions need to be considered when selecting threaded flanges for a piping system. These dimensions include:

Pressure Ratings: Threaded flanges are available in various pressure ratings, typically designated as Class 150, Class 300, Class 600, etc. The pressure rating determines the flange’s ability to withstand pressure in the connected piping system.
Size Range: Threaded flanges come in a wide range of sizes to accommodate different pipe diameters. They are commonly available from 1/2″ to 24″ nominal pipe size (NPS), although larger sizes can be custom-made.
Bolt Circle Diameter: The bolt circle diameter (BCD) is the diameter of the circle formed by the centers of the bolt holes. This dimension is critical for ensuring proper alignment and sealing of the flange connection.
Number of Bolt Holes: The number of bolt holes in a threaded flange is determined by the flange size and pressure rating. It is crucial to have the correct number of bolt holes to provide adequate clamping force and ensure a leak-free connection.
Hub Diameter: The hub diameter refers to the diameter of the flange’s raised face, which is the sealing surface that comes into contact with the mating flange. This dimension is essential for proper sealing and maintaining the integrity of the connection.
Thickness: The thickness of a threaded flange is determined by the flange size, pressure rating, and material. A thicker flange provides greater strength and durability, but also increases weight and cost.

Dimensions of ANSI/ASME B16.5 threaded flange (class150lb-2500lb)

Dimensions of ANSI/ASME B16.5 threaded flange class150 lbs

Pipe			Flange Data			Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Overall Diameter	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	3.500 88.90	0.440 11.20	0.620 15.70	0.620 15.70	1.190 30.20	1.380 35.10	4	0.620 15.70	2.380 60.45	0.39
3/4	1.050 26.70	3.880 98.60	0.500 12.70	0.620 15.70	0.620 15.70	1.500 38.10	1.690 42.90	4	0.620 15.70	2.750 69.85	0.56
1	1.315 33.40	4.250 108.0	0.560 14.20	0.690 17.50	0.690 17.50	1.940 49.30	2.000 50.80	4	0.620 15.70	3.120 79.25	0.78
11/4	1.660 42.20	4.620 117.3	0.620 15.70	0.810 20.60	0.810 20.60	2.310 58.70	2.500 63.50	4	0.620 15.70	3.500 88.90	1.03
11/2	1.900 48.30	5.000 127.0	0.690 17.50	0.880 22.40	0.880 22.30	2.560 65.00	2.880 73.15	4	0.620 15.70	3.880 98.60	1.32
2	2.375 60.30	6.000 152.4	0.750 19.10	1.000 25.40	1.000 25.40	3.060 77.70	3.620 91.90	4	0.750 19.10	4.750 120.7	2.06
21/2	2.875 73.00	7.000 177.8	0.880 22.40	1.120 28.40	1.120 28.40	3.560 90.40	4.120 104.6	4	0.750 19.10	5.500 139.7	3.28
3	3.500 88.90	7.500 190.5	0.940 23.90	1.190 30.20	1.190 30.20	4.250 108.0	5.000 127.0	4	0.750 19.10	6.000 152.4	3.85
31/2	4.000 101.6	8.500 215.9	0.940 23.90	1.250 31.75	1.250 31.75	4.810 122.2	5.500 139.7	8	0.750 19.10	7.000 177.8	4.81
4	4.500 114.3	9.000 228.6	0.940 23.90	1.310 33.30	1.310 33.30	5.310 134.9	6.190 157.2	8	0.750 19.10	7.500 190.5	5.30
5	5.563 141.3	10.00 254.0	0.940 23.90	1.440 36.60	1.440 36.60	6.440 163.6	7.310 185.7	8	0.880 22.40	8.500 215.9	6.07
6	6.625 168.3	11.00 279.4	1.000 25.40	1.560 39.60	1.560 39.60	7.560 192.0	8.500 215.9	8	0.880 22.40	9.500 241.3	7.45
8	8.625 219.1	13.50 342.9	1.120 28.40	1.750 44.50	1.750 44.50	9.690 246.1	10.62 269.7	8	0.880 22.40	11.75 298.5	12.1
10	10.75 273.0	16.00 406.4	1.190 30.20	1.940 49.30	1.940 49.30	12.00 304.8	12.75 323.9	12	1.000 25.40	14.25 362.0	16.5
12	12.75 323.8	19.00 482.6	1.250 31.75	2.190 55.60	2.190 55.60	14.38 365.3	15.00 381.0	12	1.000 25.40	17.00 431.8	26.2
14	14.00 355.6	21.00 533.4	1.380 35.10	2.250 57.15	2.250 57.15	15.75 400.1	16.25 412.7	12	1.120 28.40	18.75 476.3	34.6
16	16.00 406.4	23.50 596.9	1.440 36.60	2.500 63.50	2.500 63.50	18.00 457.2	18.50 469.9	16	1.120 28.40	21.25 539.8	44.8
18	18.00 457.2	25.00 635.0	1.560 39.60	2.690 68.30	2.690 68.30	19.88 505.0	21.00 533.4	16	1.250 31.75	22.75 577.9	48.9
20	20.00 508.0	27.50 698.5	1.690 42.90	2.880 73.15	2.880 73.15	22.00 558.8	23.00 584.2	20	1.250 31.75	25.00 635.0	61.9
24	24.00 609.6	32.00 812.8	1.880 47.80	3.250 82.60	3.250 82.60	26.12 663.4	27.25 692.2	20	1.380 35.10	29.50 749.3	86.9

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL recount threads.)
Class 150 threaded flanges are made without a counterbore. Threads are chamfered to the major diameter (approx.) at an angle of 45° (approx.) at the back of the flange.
Weights are based on manufacturer’s data and are approximate.

Dimensions of ANSI/ASME B16.5 threaded flange Class 300 lbs

Pipe			Flange Data				Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Overall Diameter	Counter-bore min	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	3.750 95.20	0.930 23.60	0.560 14.20	0.880 22.30	0.620 15.70	1.500 38.10	1.380 35.00	4	0.620 15.70	2.620 66.55	0.64
3/4	1.050 26.70	4.620 117.3	1.140 29.00	0.620 15.70	1.000 25.40	0.620 15.70	1.880 47.70	1.690 42.90	4	0.750 19.00	3.250 82.50	1.12
1	1.315 33.40	4.880 123.9	1.410 35.80	0.690 17.50	1.060 26.90	0.690 17.50	2.120 53.80	2.000 50.80	4	0.750 19.00	3.500 88.90	1.36
11/4	1.660 42.20	5.250 133.3	1.750 44.40	0.750 19.00	1.060 26.90	0.810 20.60	2.500 63.50	2.500 63.50	4	0.750 19.00	3.880 98.50	1.68
11/2	1.900 48.30	6.120 155.4	1.980 50.50	0.810 20.60	1.190 30.20	0.880 22.30	2.750 69.85	2.880 73.15	4	0.880 22.30	4.500 114.3	2.49
2	2.375 60.30	6.500 165.1	2.500 63.50	0.880 22.30	1.310 33.20	1.120 28.40	3.310 84.00	3.620 91.90	8	0.750 19.00	5.000 127.0	2.87
21/2	2.875 73.00	7.500 190.5	3.000 76.20	1.000 25.40	1.500 38.10	1.250 31.70	3.940 100.0	4.120 104.6	8	0.880 22.30	5.880 149.3	4.32
3	3.500 88.90	8.250 209.5	3.630 92.20	1.120 28.40	1.690 42.90	1.250 31.70	4.620 117.3	5.000 127.0	8	0.880 22.30	6.620 168.1	5.85
31/2	4.000 101.6	9.000 228.6	4.130 104.9	1.190 30.20	1.750 44.40	1.440 36.50	5.250 133.3	5.500 139.7	8	0.880 22.30	7.250 184.1	7.34
4	4.500 114.3	10.00 254.0	4.630 117.6	1.250 31.70	1.880 47.70	1.440 36.50	5.750 146.0	6.190 157.2	8	0.880 22.30	7.880 200.1	9.61
5	5.563 141.3	11.00 279.4	5.690 144.5	1.380 35.00	2.000 50.80	1.690 42.90	7.000 177.8	7.310 185.7	8	0.880 22.30	9.250 234.9	12.3
6	6.625 168.3	12.50 317.5	6.750 171.4	1.440 36.50	2.060 52.30	1.810 45.90	8.120 206.2	8.500 215.9	12	0.880 22.30	10.62 269.7	15.6
8	8.625 219.1	15.00 381.0	8.750 222.2	1.620 41.10	2.440 61.90	2.000 50.80	10.25 260.3	10.62 269.7	12	1.000 25.40	13.00 330.2	24.2
10	10.75 273.0	17.50 444.5	10.88 276.3	1.880 47.70	2.620 66.55	2.190 55.60	12.62 320.5	12.75 323.9	16	1.120 28.40	15.25 387.3	34.1
12	12.75 323.8	20.50 520.7	12.94 328.7	2.000 50.80	2.880 73.15	2.380 60.45	14.75 374.6	15.00 381.0	16	1.250 31.70	17.75 450.8	49.8
14	14.00 355.6	23.00 584.2	14.19 360.4	2.120 53.80	3.000 76.20	2.500 63.50	16.75 425.4	16.25 412.7	20	1.250 31.70	20.25 514.3	69.9
16	16.00 406.4	25.50 647.7	16.19 411.2	2.250 57.15	3.250 82.50	2.690 68.30	19.00 482.6	18.50 469.9	20	1.380 35.00	22.50 571.5	88.1
18	18.00 457.2	28.00 711.2	18.19 462.0	2.380 60.45	3.500 88.90	2.750 69.85	21.00 533.4	21.00 533.4	24	1.380 35.00	24.75 628.6	109
20	20.00 508.0	30.50 774.7	20.19 512.8	2.500 63.50	3.750 95.2	2.880 73.15	23.12 587.2	23.00 584.2	24	1.380 35.00	27.00 685.8	134
24	24.00 609.6	36.00 914.4	24.19 614.4	2.750 69.85	4.190 106.4	3.250 82.50	27.62 701.5	27.25 692.2	24	1.620 41.10	32.00 812.8	201

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
Weights are based on manufacturer’s data and are approximate.

Dimensions of ANSI/ASME B16.5 threaded flange Class 400 lbs

Pipe			Flange Data				Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Overall Diameter	Counter-bore min	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	3.750 95.30	0.930 23.60	0.560 14.20	0.880 22.40	0.620 15.70	1.500 38.10	1.380 35.10	4	0.620 15.70	2.620 66.55	0.74
3/4	1.050 26.70	4.620 117.3	1.140 29.00	0.620 15.70	1.000 25.40	0.620 15.70	1.880 47.80	1.690 42.90	4	0.750 19.10	3.250 82.60	1.27
1	1.315 33.40	4.880 124.0	1.410 35.80	0.690 17.50	1.060 26.90	0.690 17.50	2.120 53.80	2.000 50.80	4	0.750 19.10	3.500 88.90	1.52
11/4	1.660 42.20	5.250 133.4	1.750 44.50	0.810 20.60	1.120 28.40	0.810 20.60	2.500 63.50	2.500 63.50	4	0.750 19.10	3.880 98.60	2.03
11/2	1.900 48.30	6.120 155.4	1.990 50.50	0.880 22.40	1.250 31.75	0.880 22.40	2.750 69.85	2.880 73.15	4	0.880 22.40	4.500 114.3	2.96
2	2.375 60.30	6.500 165.1	2.500 63.50	1.000 25.40	1.440 36.60	1.120 28.40	3.310 84.10	3.620 91.90	8	0.750 19.10	5.000 127.0	3.62
21/2	2.875 73.00	7.500 190.5	3.000 76.20	1.120 28.40	1.620 41.10	1.250 31.75	3.940 100.1	4.120 104.6	8	0.880 22.40	5.880 149.4	5.28
3	3.500 88.90	8.250 209.6	3.630 92.20	1.250 31.75	1.810 46.00	1.380 35.10	4.620 117.3	5.000 127.0	8	0.880 22.40	6.620 168.1	7.00
31/2	4.000 101.6	9.000 228.6	413.0 104.9	1.380 35.10	1.940 49.30	1.560 39.60	5.250 133.4	5.500 139.7	8	1.000 25.40	7.250 184.2	8.84
4	4.500 114.3	10.00 254.0	4.630 117.6	1.380 35.10	2.000 50.80	1.440 36.60	5.750 146.1	6.190 157.2	8	1.000 25.40	7.880 200.2	11.1
5	5.563 141.3	11.00 279.4	5.690 144.5	1.500 38.10	2.120 53.80	1.690 42.90	7.000 177.8	7.310 185.7	8	1.000 25.40	9.250 235.0	13.9
6	6.625 168.3	12.50 317.5	6.750 171.5	1.620 41.10	2.250 57.15	1.810 46.00	8.120 206.2	8.500 215.9	12	1.000 25.40	10.62 269.7	18.3
8	8.625 219.1	15.00 381.0	8.750 222.3	1.880 47.80	2.690 68.30	2.000 50.80	10.25 260.4	10.62 269.7	12	1.120 28.40	13.00 330.2	28.6
10	10.75 273.0	17.50 444.5	10.88 276.4	2.120 53.80	2.880 73.15	2.190 55.60	12.62 320.5	12.75 323.9	16	1.250 31.75	15.25 387.4	39.2
12	12.75 323.8	20.50 520.7	12.94 328.7	2.250 57.15	3.120 79.25	2.380 60.45	14.75 374.7	15.00 381.0	16	1.380 35.10	17.75 450.9	57.0
14	14.00 355.6	23.00 584.2	14.19 360.4	2.380 60.45	3.310 84.10	2.500 63.50	16.75 425.5	16.25 412.8	20	1.380 35.10	20.25 514.4	79.1
16	16.00 406.4	25.50 647.7	16.19 411.2	2.500 63.50	3.690 93.70	2.690 68.30	19.00 482.6	18.50 469.9	20	1.500 38.10	22.50 571.5	101
18	18.00 457.2	28.00 711.2	18.19 462.0	2.620 66.55	3.880 98.60	2.750 69.85	21.00 533.4	21.00 533.4	24	1.500 38.10	24.75 628.7	123
20	20.00 508.0	30.50 774.7	20.19 512.8	2.750 69.85	4.000 101.6	2.880 73.15	23.12 587.2	23.00 584.2	24	1.620 41.10	27.00 685.8	146
24	24.00 609.6	36.00 914.4	24.19 614.4	3.000 76.20	4.500 114.3	3.250 82.60	27.62 701.5	27.25 692.2	24	1.880 47.80	32.00 812.8	219

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
Weights are based on manufacturer’s data and are approximate.

Dimensions of ANSI/ASME B16.5 threaded flange Class 600 lbs

Pipe			Flange Data				Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Overall Diameter	Counter-bore min	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	3.750 95.20	0.930 23.60	0.560 14.20	0.880 22.40	0.620 15.70	1.500 38.10	1.380 35.10	4	0.620 15.70	2.620 66.55	0.74
3/4	1.050 26.70	4.620 117.3	1.140 29.00	0.620 15.70	1.000 25.40	0.620 15.70	1.880 47.80	1.690 42.90	4	0.750 19.10	3.250 82.60	1.27
1	1.315 33.40	4.880 124.0	1.410 35.80	0.690 17.50	1.060 26.90	0.690 17.50	2.120 53.80	2.000 50.80	4	0.750 19.10	3.500 88.90	1.52
11/4	1.660 42.20	5.250 133.4	1.750 44.50	0.810 20.60	1.120 28.40	0.810 20.60	2.500 63.50	2.500 63.50	4	0.750 19.10	3.880 98.60	2.03
11/2	1.900 48.30	6.120 155.4	1.990 50.50	0.880 22.40	1.250 31.75	0.880 22.40	2.750 69.85	2.880 73.15	4	0.880 22.40	4.500 114.3	2.96
2	2.375 60.30	6.500 165.1	2.500 63.50	1.000 25.40	1.440 36.60	1.120 28.40	3.310 84.10	3.620 91.90	8	0.750 19.10	5.000 127.0	3.62
21/2	2.875 73.00	7.500 190.5	3.000 76.20	1.120 28.40	1.620 41.10	1.250 31.75	3.940 100.1	4.120 104.6	8	0.880 22.40	5.880 149.4	5.28
3	3.500 88.90	8.250 209.6	3.630 92.20	1.250 31.75	1.810 46.00	1.380 35.10	4.620 117.3	5.000 127.0	8	0.880 22.40	6.620 168.1	7.00
31/2	4.000 101.6	9.000 228.6	4.130 104.9	1.380 35.10	1.940 49.30	1.560 39.60	5.250 133.4	5.500 139.7	8	1.000 25.40	7.250 184.2	8.84
4	4.500 114.3	10.75 273.1	4.630 117.6	1.500 38.10	2.120 53.80	1.620 41.10	6.000 152.4	6.190 157.2	8	1.000 25.40	8.500 215.9	14.5
5	5.563 141.3	13.00 330.2	5.690 144.5	1.750 44.50	2.380 60.45	1.880 47.80	7.440 189.0	7.310 185.7	8	1.120 28.40	10.50 266.7	24.4
6	6.625 168.3	14.00 355.6	6.750 171.5	1.880 47.80	2.620 66.55	2.000 50.80	8.750 222.3	8.500 215.9	12	1.120 28.40	11.50 292.1	28.7
8	8.625 219.1	16.50 419.1	8.750 222.3	2.190 55.60	3.000 76.20	2.250 57.15	10.75 273.1	10.62 269.7	12	1.250 31.75	13.75 349.3	43.4
10	10.75 273.0	20.00 508.0	10.88 276.4	2.500 63.50	3.380 85.90	2.560 65.00	13.50 342.9	12.75 323.9	16	1.380 35.10	17.00 431.8	70.3
12	12.75 323.8	22.00 558.8	12.94 328.7	2.620 66.55	3.620 91.90	2.750 69.85	15.75 400.1	15.00 381.0	20	1.380 35.10	19.25 489.0	84.2
14	14.00 355.6	23.75 603.3	14.19 360.4	2.750 69.85	3.690 93.70	2.880 73.15	17.00 431.8	16.25 412.8	20	1.500 38.10	20.75 527.1	98.7
16	16.00 406.4	27.00 685.8	16.19 411.2	3.000 76.20	4.190 106.4	3.060 77.70	19.50 495.3	18.50 469.9	20	1.620 41.10	23.75 603.3	142
18	18.00 457.2	29.25 743.0	18.19 462.0	3.250 82.60	4.620 117.3	3.120 79.25	21.50 546.1	21.00 533.4	20	1.750 44.50	25.75 654.1	173
20	20.00 508.0	32.00 812.8	20.19 512.8	3.500 88.90	5.000 127.0	3.250 82.60	24.00 609.6	23.00 584.2	24	1.750 44.50	28.50 723.9	220
24	24.00 609.6	37.00 939.8	24.19 614.4	4.000 101.6	5.500 139.7	3.620 91.90	28.25 717.6	27.25 692.2	24	2.000 50.80	33.00 838.2	312

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
Weights are based on manufacturer’s data and are approximate.

Dimensions of ANSI/ASME B16.5 threaded flange Class 900 lbs

Pipe			Flange Data				Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Diameter Overall	Counter-bore min	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	4.750 120.6	0.930 23.60	0.880 22.30	1.250 31.70	0.880 22.30	1.500 38.10	1.380 35.10	4	0.880 22.30	3.250 82.50	1.74
3/4	1.050 26.70	5.120 130.0	1.140 29.00	1.000 25.40	1.380 35.00	1.000 25.40	1.750 44.40	1.690 42.90	4	0.880 22.30	3.500 88.90	2.34
1	1.315 33.40	5.880 149.3	1.410 35.80	1.120 28.40	1.620 41.10	1.120 28.40	2.060 52.30	2.000 50.80	4	1.000 25.40	4.000 101.6	3.44
11/4	1.660 42.20	6.250 158.7	1.750 44.40	1.120 28.40	1.620 41.10	1.190 30.20	2.500 63.50	2.500 63.50	4	1.000 25.40	4.380 111.2	3.91
11/2	1.900 48.30	7.000 177.8	1.990 50.50	1.250 31.70	1.750 44.50	1.250 31.70	2.750 69.85	2.880 73.15	4	1.120 28.40	4.880 123.9	5.36
2	2.375 60.30	8.500 215.9	2.500 63.50	1.500 38.10	2.250 57.15	1.500 38.10	4.120 104.6	3.620 91.90	8	1.000 25.40	6.500 165.1	9.85
21/2	2.875 73.00	9.620 244.3	3.000 76.20	1.620 41.10	2.500 63.50	1.880 47.70	4.880 123.9	4.120 104.6	8	1.120 28.40	7.500 190.5	13.7
3	3.500 88.90	9.500 241.3	3.630 92.20	1.500 38.10	2.120 53.80	1.620 41.10	5.000 127.0	5.000 127.0	8	1.000 25.40	7.500 190.5	11.6
4	4.500 114.3	11.50 292.1	4.630 117.6	1.750 44.40	2.750 69.85	1.880 47.80	6.250 158.7	6.190 157.2	8	1.250 31.70	9.250 234.9	19.7
5	5.563 141.3	13.75 349.2	5.690 144.5	2.000 50.80	3.120 79.25	2.120 53.80	7.500 190.5	7.310 185.7	8	1.380 35.00	11.00 279.4	31.9
6	6.625 168.3	15.00 381.0	6.750 171.4	2.190 55.60	3.380 85.80	2.250 57.15	9.250 234.9	8.500 215.9	12	1.250 31.70	12.50 317.5	41.1
8	8.625 219.1	18.50 469.9	8.750 222.2	2.500 63.50	4.000 101.6	2.500 63.50	11.75 298.4	10.62 269.7	12	1.500 38.10	15.50 393.7	70.7
10	10.75 273.0	21.50 546.1	10.88 276.3	2.750 69.85	4.250 107.9	2.810 71.40	14.50 368.3	12.75 323.9	16	1.500 38.10	18.50 469.9	101
12	12.75 323.8	24.00 609.6	12.94 328.7	3.120 79.40	4.620 117.3	3.000 76.20	16.50 419.1	15.00 381.0	20	1.500 38.10	21.00 533.4	133
14	14.00 355.6	25.25 641.3	14.19 360.4	3.380 85.70	5.120 130.0	3.250 82.50	17.75 450.8	16.25 412.7	20	1.620 41.10	22.00 558.8	153
16	16.00 406.4	27.75 704.8	16.19 411.2	3.500 88.90	5.250 133.3	3.380 85.90	20.00 508.0	18.50 469.9	20	1.750 44.40	24.25 618.9	185
18	18.00 457.2	31.00 787.4	18.19 462.0	4.000 101.6	6.000 152.4	3.500 88.90	22.25 565.1	21.00 533.4	20	2.000 50.80	27.00 685.8	258
20	20.00 508.0	33.75 857.2	20.19 512.8	4.250 107.9	6.250 158.7	3.620 91.90	24.50 622.3	23.00 584.2	20	2.120 53.80	29.50 749.3	317
24	24.00 609.6	41.00 1041.4	24.19 614.4	5.500 139.7	8.000 203.2	4.000 101.6	29.50 749.3	27.25 692.2	20	2.620 66.55	35.50 901.7	606

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
Weights are based on manufacturer’s data and are approximate.

Dimensions of ANSI/ASME B16.5 threaded flange Class 1500 lbs

Pipe			Flange Data				Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Overall Diameter	Counter-bore min	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	4.750 120.6	0.930 23.60	0.880 22.30	1.250 31.70	0.880 22.30	1.500 38.10	1.380 35.00	4	0.880 22.30	3.250 82.50	1.74
3/4	1.050 26.70	5.120 130.0	1.140 29.00	1.000 25.40	1.380 35.00	1.000 25.40	1.750 44.40	1.690 42.90	4	0.880 22.30	3.500 88.90	2.34
1	1.315 33.40	5.880 149.3	1.410 35.80	1.120 28.40	1.620 41.10	1.120 28.40	2.060 52.30	2.000 50.80	4	1.000 25.40	4.000 101.6	3.44
11/4	1.660 42.20	6.250 158.7	1.750 44.40	1.120 28.40	1.620 41.10	1.190 30.20	2.500 63.50	2.500 63.50	4	1.000 25.40	4.380 111.2	3.91
11/2	1.900 48.30	7.000 177.8	1.990 50.50	1.250 31.70	1.750 44.50	1.250 31.70	2.750 69.85	2.880 73.15	4	1.120 28.40	4.880 123.9	5.36
2	2.375 60.30	8.500 215.9	2.500 63.50	1.500 38.10	2.250 57.15	1.500 38.10	4.120 104.6	3.620 91.90	8	1.000 25.40	6.500 165.1	9.85
21/2	2.875 73.00	9.620 244.3	3.000 76.20	1.620 41.10	2.500 63.50	1.880 47.70	4.880 123.9	4.120 104.6	8	1.120 28.40	7.500 190.5	13.7

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
Weights are based on manufacturer’s data and are approximate.

Dimensions of ANSI/ASME B16.5 threaded flange Class 2500 lbs

Pipe			Flange Data				Hub	Raised Face	Drilling Data			Weight
NominalPipe Size
NominalPipe Size	Outside Diameter	Overall Diameter	Counter-bore min	FlangeThickness min	Overall Length	Threaded lengthmin	Hub Diameter	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in	in	in	in	in	in	in	in		in	in	kg/piece
	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm
1/2	0.840 21.30	5.250 133.4	0.930 23.60	1.190 30.20	1.560 39.60	1.120 28.40	1.690 42.90	1.380 35.10	4	0.880 22.40	3.500 88.90	2.95
3/4	1.050 26.70	5.500 139.7	1.140 29.00	1.250 31.75	1.690 42.90	1.250 31.75	2.000 50.80	1.690 42.90	4	0.880 22.40	3.750 95.30	3.44
1	1.315 33.40	6.250 158.8	1.410 35.80	1.380 35.10	1.880 47.80	1.380 35.10	2.250 57.15	2.000 50.80	4	1.000 25.40	4.250 108.0	4.82
11/4	1.660 42.20	7.250 1.842	1.750 44.50	1.500 38.10	2.060 52.30	1.500 38.10	2.880 73.15	2.500 63.50	4	1.120 28.40	5.120 130.0	7.14
11/2	1.900 48.30	8.000 203.2	1.990 50.50	1.750 44.50	2.380 60.45	1.750 44.50	3.120 79.25	2.880 73.15	4	1.250 31.75	5.750 146.1	10.0
2	2.375 60.30	9.250 235.0	2.500 63.50	2.000 50.80	2.750 69.85	2.000 50.80	3.750 95.30	3.620 91.90	8	1.120 28.40	6.750 171.5	14.8
21/2	2.875 73.00	10.50 266.7	3.000 76.20	2.250 57.15	3.120 79.25	2.250 57.15	4.500 114.3	4.120 104.6	8	1.250 31.75	7.750 196.9	21.5

Notes

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)
Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).
Weights are based on manufacturer’s data and are approximate.

Dimensions of BS 4504 Standard Code 113 threaded flange

BS 4504 Code 113 threaded flange Dimensions in mm

DN	PN	A mm	B mm	C mm	D mm	E mm
10	6	75	25	12	20	3
	16	90	30	14	20
	40	90	30	16	22
15	6	80	30	12	20	3
	16	95	35	14	20
	40	95	35	16	22
20	6	90	40	14	24	4
	16	105	45	16	24
	40	105	45	18	26
25	6	100	50	14	24	4
	16	115	52	16	24
	40	115	52	18	28
32	6	120	60	14	26	5
	16	140	60	16	26
	40	140	60	18	30
40	6	130	70	14	26	5
	16	150	70	16	26
	40	150	70	18	32
50	6	140	80	14	28	5
	16	165	84	18	28
	40	165	84	20	34
65	6	160	100	14	32	6
	16	185	104	18	32
	40	185	104	22	38
80	6	190	110	16	34	6
	16	200	118	20	34
	40	200	118	24	40
100	6	210	130	16	40	6
	16	220	140	20	40
	40	235	145	24	44

DN	PN	A mm	B mm	C mm	D mm	E mm
125	6	240	160	18	44	6
	16	250	168	22	44
	40	270	170	26	48
150	6	265	185	18	44	8
	16	285	195	22	44
	40	300	200	28	52
200	6	320	240	20	44	8
	16	340	246	24	44
	40	375	260	34	52
250	6	375	295	22	44	10
	16	405	298	26	46
	40	450	312	38	60
300	6	440	355	22	44	10
	16	460	350	28	46
	40	515	380	42	67
350	16	520	400	30	57	10
350	40	580	424	46	72	10
400	16	580	456	32	63	10
400	40	660	478	50	78	10
450	16	640	502	34	68	12
450	40	685	522	50	84	12
500	16	715	559	34	73	12
500	40	755	576	52	90	12
600	16	840	658	36	83	12
600	40	890	686	60	100	12
700	16	910	760	36	83	12
800	16	1025	864	38	90	12
900	16	1125	968	40	94	12
1000	16	1255	1072	42	100	12

Dimensions of threaded flanges according to standard EN 1092-1

EN 1092-1 threaded flanges PN6

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	75	50	11	4	35	2	12	20	25	4
15	21.3	80	55	11	4	40	2	12	20	30	4
20	26.9	90	55	11	4	50	2	14	21	40	4
25	33.7	100	75	11	4	60	2	14	24	50	4
32	42.4	120	95	14	4	70	2	14	26	60	6
40	48.3	130	100	14	4	80	3	14	26	70	6
50	60.3	140	110	14	4	90	3	14	28	80	6
65	76.1	460	130	14	4	110	3	14	32	100	6
80	88.9	190	150	18	4	128	3	16	34	110	8
100	114.3	210	170	18	4	148	3	16	40	130	8
125	139.7	240	200	18	8	178	3	18	44	160	8
150	168.3	265	225	18	8	202	3	18	44	185	10
200	219.1	320	280	18	8	258	3	20	44	240	10
250	273	375	335	18	12	312	3	22	44	295	12
300	323.9	440	395	22	12	365	4	22	44	355	12

EN 1092-1 threaded flanges PN10

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	90	60	14	4	40	2	16	22	30	4
15	21.3	95	65	14	4	45	2	16	22	35	4
20	26.9	105	75	14	4	58	2	18	26	45	4
25	33.7	115	85	14	4	68	2	18	28	52	4
32	42.4	140	100	18	4	78	2	18	30	60	6
40	48.3	150	110	18	4	88	3	18	32	70	6
50	60.3	165	125	18	4	102	3	18	28	84	6
65	76.1	185	145	18	8	122	3	18	32	104	6
80	88.9	200	160	18	8	138	3	20	34	118	6
100	114.3	220	180	18	8	158	3	20	40	140	8
125	139.7	250	210	18	8	188	3	22	44	168	8
150	168.3	285	240	22	8	212	3	22	44	195	10
200	219.1	340	295	22	8	268	3	24	44	246	10
250	273	395	350	22	12	320	3	26	46	298	12
300	323.9	445	400	22	12	370	4	26	46	350	12
350	355.6	505	460	22	16	430	4	26	53	400	12
400	406.4	565	515	26	16	482	4	26	57	456	12
450	457	615	565	26	20	532	4	28	63	502	12
500	508	670	620	26	20	585	4	28	67	559	12
600	610	780	725	30	20	685	5	30	75	658	12

EN 1092-1 threaded flanges PN16

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	90	60	14	4	40	2	16	22	30	4
15	21.3	95	65	14	4	45	2	16	22	35	4
20	26.9	105	75	14	4	58	2	18	26	45	4
25	33.7	115	85	14	4	68	2	18	28	52	4
32	42.4	140	100	18	4	78	2	18	30	60	6
40	48.3	150	110	18	4	88	3	18	32	70	6
50	60.3	165	125	18	4	102	3	18	28	84	6
65	76.1	185	145	18	8	122	3	18	32	104	6
80	88.9	200	160	18	8	138	3	20	34	118	6
100	114.3	220	180	18	8	158	3	20	40	140	8
125	139.7	250	210	18	8	188	3	22	44	168	8
150	168.3	285	240	22	8	212	3	22	44	195	10
200	219.1	340	293	22	12	268	3	24	44	246	10
250	273	405	355	26	12	320	3	26	46	398	12
300	323.9	460	410	26	12	378	4	28	46	350	12
350	355.6	520	470	26	16	438	4	30	67	400	12
400	406.4	580	525	30	16	490	4	32	63	456	12
450	457	640	585	30	20	550	4	34	68	502	12
500	508	715	650	33	20	610	4		73	557	12
600	610	840	770	36	20	723	5		83	658	12

EN 1092-1 threaded flanges PN25

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	90	60	14	4	40	2	16	22	30	4
15	21.3	95	65	14	4	45	2	16	22	35	4
20	26.9	105	75	14	4	58	2	18	26	45	4
25	33.7	115	85	14	4	68	2	18	28	52	4
32	42.4	140	100	18	4	78	2	18	30	60	6
40	48.3	150	110	18	4	88	3	18	32	70	6
50	60.3	165	125	18	4	102	3	20	34	84	6
65	76.1	185	145	18	8	122	3	22	38	104	6
80	88.9	200	160	18	8	138	3	24	40	118	8
100	114.3	235	190	22	8	162	3	24	44	145	8
125	139.7	270	220	26	8	188	3	26	48	170	8
150	168.3	300	250	26	8	218	3	28	52	200	10
200	219.1	360	310	26	12	278	3	30	52	256	10
250	273	425	370	30	12	335	3	32	60	310	12
300	323.9	485	430	30	16	395	4	34	67	364	12
350	355.6	555	490	33	16	450	4	38	72	418	12
400	406.4	620	550	36	16	505	4	40	78	472	12
450	457	670	600	36	20	555	4	46	84	520	12
500	508	730	660	36	20	615	4	48	90	580	12
600	610	845	770	39	20	720	5	48	100	684	12

EN 1092-1 threaded flanges PN40

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	90	60	14	4	40	2	16	22	30	4
15	21.3	95	65	14	4	45	2	16	22	35	4
20	26.9	105	75	14	4	58	2	18	26	45	4
25	33.7	115	85	14	4	68	2	18	28	52	4
32	42.4	140	100	18	4	78	2	18	30	60	6
40	48.3	150	110	18	4	88	3	18	32	70	6
50	60.3	165	125	18	4	102	3	20	34	84	6
65	76.1	185	145	18	8	122	3	22	38	104	6
80	88.9	200	160	18	8	138	3	24	40	118	8
100	114.3	235	190	22	8	162	3	24	44	145	8
125	139.7	270	220	26	8	188	3	26	48	170	8
150	168.3	300	250	26	8	218	3	28	52	200	10
200	219.1	375	320	30	12	285	3	34	52	260	10
250	273	450	385	33	12	345	3	38	60	312	12
300	323.9	515	450	33	16	410	4	42	67	380	12
350	355.6	580	510	36	16	465	4	46	72	424	12
400	406.4	660	585	39	16	535	4	50	78	478	12
450	457	685	610	39	20	560	4	57	84	522	12
500	608	755	670	42	20	615	4	57	90	576	12
600	610	890	795	48	20	735	5	72	100	686	12

EN 1092-1 threaded flanges PN63

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	100	70	14	4	40	2	20	28	40	4
15	21.3	105	75	14	4	45	2	20	28	43	4
20	26.9	130	90	18	4	58	2	20	30	52	4
25	33.7	140	100	18	4	68	2	24	32	60	4
32	42.4	155	110	22	4	78	2	24	32	68	6
40	48.3	170	125	22	4	88	3	26	34	80	6
50	60.3	180	135	22	4	102	3	26	36	90	6
65	76.1	205	160	22	8	122	3	26	40	112	6
80	88.9	215	170	22	8	138	3	28	44	125	8
100	114.3	250	200	26	8	162	3	30	52	152	8
125	139.7	295	240	30	8	188	3	34	56	185	8
160	168.3	345	280	33	8	218	3	36	60	215	10

EN 1092-1 threaded flanges PN100

DN	Pipe OD, A	Outside Diamete, D	Diameter of Bolt Circle, K	Dia of Bolt Hole, L	No. of bolt	Diameter of Raised Face, d	Height of Raised Face, f1	Flange thickness, C	Length of Flange, H	Neck Diameter , N	Radius of Corners, r
10	17.2	100	70	14	4	40	2	20	28	40	4
15	21.3	105	75	14	4	45	2	20	28	43	4
20	26.9	130	90	18	4	58	2	20	30	52	4
25	33.7	140	100	18	4	68	2	24	32	60	4
32	42.4	155	110	22	4	78	2	24	32	68	6
40	48.3	170	125	22	4	88	3	26	34	80	6
50	60.3	195	145	26	4	102	3	28	36	95	6
65	76.1	220	170	26	8	122	3	30	40	118	6
80	88.9	230	180	26	8	138	3	32	44	130	8
100	114.3	265	210	30	8	162	3	36	52	158	8
125	139.7	315	250	33	8	188	3	40	56	188	8
150	168.3	355	290	33	12	218	3	44	60	225	10

Manufacturing Process of Threaded Flanges

Threaded flanges can be produced by forging, casting. We mainly produce flanges by forging, cutting and rolling processes. We will take you through the step-by-step process of manufacturing threaded flanges, from the materials used to the final product.

The following type of flange was selected for the qualification. Using the above introduced materials, flanges were manufactured by hummer die forging.

Flange type: 900lbs. 14B SO RF Sch.80 (φ640 x φ318 x H220)

Step 1: Material Selection

The first step in our manufacturing process is material selection. The raw material of the flange is round bar or steel ingot. Billet diameter of F51/F60 was 300 mm and F53 was 350 mm respectively. The billets were cut into blocks of individual weight of 346 kg. We use only the highest quality materials, including carbon steel, stainless steel, and alloy steel. Each material has its own unique properties and is selected based on the specific needs of the customer.

Step 2: Cutting

Once the materials are selected, they are cut to the desired size using a cutting machine. We use state-of-the-art cutting machines to ensure precision and accuracy in every cut.

Step 3: Heating

After the materials are cut, they are heated to the desired temperature. This helps to reduce any stresses in the material and makes it easier to shape the flange.

Step 4: Forging

The flanges were manufactured by closed die forging. The forging was performed by two hummers installed in a domestic forging company according to our order requirements. Table 2 shows the forging conditions and Figure 1 shows the pictures of each forging stage.
The forging operation of F51/F60 needed three heats and F53 needed four heats. After forging, the products were quenched immediately in the water. No defect was found on the surface of the products.
Table.1 Chemical compositions (wt%)

Table.2 Hot working conditions

Figure. Forging process

Step 5: Forming

The next step in our manufacturing process is forming the flange. We use a hydraulic press to shape the heated material into the desired shape. This ensures that each flange is formed with precision and accuracy.

Step 6: Heat treatment

Verification test of the furnace

Before the solution treatment of the flanges, a verification test was carried out in order to confirm the temperature distribution in the furnace. Twenty five (25) dummy flanges were prepared for the test as shown in Figure 2. The measurement result using several thermo couples on the dummy flanges is shown in Figure 3. According to the temperature chart, the maximum temperature difference from target temperature during annealing stage is seven (7) degrees. This means that the furnace is well controlled as a furnace for the solution treatment of stainless steel products.

Figure.2 Dummy flanges for verification

Figure.3 Temperature record chart

Solution treatment of the flanges

Solution treatment was made after forging. Heat cycle is shown in the following: 1,050 ℃ x 2 hours → water quenching.

Surface temperature was monitored at three points of the flange during annealing. All temperature ranges were met within 1,050 ± 7℃ which was satisfactory to standard.

Moreover standard requires that the duration from furnace into quenching bath shall be less than 60sec and the water temperature of the bath shall be below 50℃. According to the measurement results during the quenching, it was confirmed that the transferring time was 53sec and the water temperature was kept under 50℃.

Step 7: Machining

Following the solution treatment, a flange of each material was finished by machining.
There was no difficulty when machining.

After finishing, the penetrant testing (PT) was carried out. No surface defect was found.

Step 8: Investigations of properties

The following investigations were carried out according to standards:

1) Tensile test
2) Impact test
3) Corrosion test
4) Microstructure observation
5) Ferrite content
6) Hardness (only for F53)

Sampling locations except hardness measurement are indicated in Figure 5.

Position 1 is specified at middle of hub and position 2 at middle of flange respectively.

Tensile test
Tensile test results at room temperature are shown in Table 3. At every position, properties are satisfactory to the requirements of standards.
Table.3 Tensile test results

Impact test
Charpy 2mm V-notch tests were carried out at -46 C. Sampling locations were pos. 1 and pos.2 as shown in Figure 5. At each location, the specimens were sampled in axial and tangential directions.
The results are shown in Table 4 with requirements of standards. All results meet the requirements successfully.
However, in the case of F51/F60 material, the results in axial direction at pos.2 are just above the minimum requirements. Therefore further study will be desired in order to increase the impact toughness in this condition.
Table.4 Impact test results

Corrosion test
Corrosion tests were carried out according to ASTM G48 Method A- Ferric Chloride Pitting Test using the specimens sampled at pos.1 and pos.2. Testing conditions were 25 °C x 24 hrs for F51/F60 and 50 °C x 24 hrs for F53 respectively. Table 5 shows the size of specimens and the test results of weight loss. As shown in the table, corrosion resistance of these materials are quite satisfactory.
Table.5 Corrosion test results

Microstructure
Microstructure observation was made at the location of pos.1 and pos.2. As shown in Figure 6, every structure is austenite and ferrite duplex structure. Secondary austenite is observed in both materials however no intermetallic phase is found.

Figure.6 Microstructure

Ferrite content
Table 6 shows the results of ferrite content measurement. AlI of them are between 35 – 55 % which is required by standards. Ferrite content of F53 is less than F51/F60.

Table.5 Ferrite Content

Hardness
Hardness measurement was made only for F53 flange because ASTM A182 requires hardness range to be maximum HB300 for F53 material. All of the results at twenty five (25) points of the radial section were between HB 238 – 260 which meet ASTM requirement. Since specifes no hardness requirement, this measurement is reference only.

Step 9: Qualification

Qualification of the flanges

As reported above, all the properties satisfied the requirements of standards. Based on these investigation data the flanges made of F51/F60 and F53 materials were qualified.

Step 10: Packaging and Delivery

Finally, the flange is packaged and prepared for delivery to the customer. We take great care in packaging our products to ensure that they arrive at their destination in pristine condition.

At Guanxin, we take great pride in our manufacturing process of threaded flanges. We are committed to producing high-quality flanges that meet the needs of our customers. Contact us today to learn more about our products and services.

Marking of threaded flanges

The marking of threaded flanges is essential to their manufacture and use. The marking aims to provide information about the flange’s material, size, pressure rating, and other relevant details.

threaded flanges are typically marked by industry standards, such as ASME B16.5 or EN 1092-1. These standards specify the required information that must be included on the flange, as well as the format and location of the markings.

The required information typically includes the following:

Flange size
Pressure rating
Material specification
Tag number
Manufacturer’s name or trademark
Heat number or lot number
Date of manufacture

The standard also specifies the location of the marking on the flange. Typically, the marking is placed on the raised face of the flange near the bolt holes. In some cases, the marking may be located on the flange hub or the plate itself.

Packing of threaded flanges

How to package threaded flanges? To pack the threaded flange, follow these steps:

When it comes to packaging threaded flanges, it’s important to ensure that they are properly protected and secured during transportation to prevent any damage. We will walk you through some of the key steps to follow when packaging threaded flanges.

Step 1: Clean and Inspect the Flanges

Before packaging the threaded flanges, it’s essential to clean them thoroughly to remove any dust, dirt, or debris that may have accumulated on them. You can use a cloth or brush to clean the flanges and inspect them to ensure they are free from any defects or damages.

Step 2: Choose the Right Packaging Material

The packaging material you choose should be sturdy and able to provide adequate protection to the flanges during transportation. Ideally, you should use a strong cardboard box or wooden crate that can withstand the weight and size of the threaded flanges.

Step 3: Secure the Flanges

Once you have the packaging material ready, you need to secure the flanges to prevent them from moving around or getting damaged during transit. You can use bubble wrap, foam, or any other suitable cushioning material to protect the threaded flanges from impact or shock.

Step 4: Label the Package

Labeling the package correctly is crucial to ensure that it reaches the intended destination without any confusion. You should clearly label the package with the recipient’s address, contact information, and any other necessary details.

Step 5: Arrange for Shipping

After the package is fully prepared and labeled, it’s time to arrange for shipping. You can use a reliable courier or shipping company to ensure that the package is delivered on time and in good condition.

Packaging threaded flanges requires careful planning and attention to detail. By following the above steps, you can ensure that your flanges are properly protected and arrive at their destination safely. Remember to use high-quality packaging materials, secure the threaded flanges properly, and label the package accurately to avoid any mishaps during transportation.

Inspection and measurement of threaded flanges

There are several factors that need to be considered when inspecting and measuring threaded flanges, including:

Material

The first thing to inspect in a threaded flange is the material. The standard specifies that the flanges should be made from materials such as carbon steel, stainless steel, or alloy steel. The material should be free from any defects such as cracks, porosity, or inclusions that can affect the integrity of the flange.

Dimension

The next thing to inspect in a threaded flange is its dimension. The standard specifies the dimensions of the flanges based on their nominal size and pressure rating. The flanges should be inspected for their inside and outside diameter, thickness, and overall dimensions to ensure they meet the requirements of the standard.

Surface Finish

The surface finish of a flange is also important. The standard specifies that the flanges should have a smooth and even surface finish to ensure proper sealing of the gasket. Any roughness or irregularities on the surface of the flange can lead to leaks in the piping system.

Bolt Hole Alignment

The bolt holes in a flange should be aligned properly to ensure the bolts can be inserted and tightened correctly. The bolt holes should be inspected to ensure they are in the correct position and are not misaligned.

Bolt Hole Size

The size of the bolt holes is also important. The standard specifies the size of the bolt holes based on the nominal size and pressure rating of the flange. The bolt holes should be inspected to ensure they are the correct size and are not damaged.

Bolt Hole Thread

The threads in the bolt holes are important to ensure the bolts can be screwed in and tightened properly. The threads should be inspected to ensure they are clean and free from any damage or defects.

To inspect and measure threaded flanges, you will need a set of calipers or a micrometer to accurately measure the dimensions of the flange. It is also a good idea to have a torque wrench on hand to ensure that the bolts are tightened to the correct torque specification.

Threaded Flanges Installation Process

Pipe Preparation: Ensure the pipe end is clean, free of debris, and has a smooth, beveled edge to facilitate a proper weld.
Flange Alignment: Align the threaded flange with the pipe, ensuring that the bolt holes are properly oriented and the flange face is parallel to the pipe end.
Tack Welding: Secure the flange in place with small, temporary welds, known as tack welds. These welds maintain the flange’s alignment with the pipe during the welding process.
Welding: Perform a full-penetration, butt-weld between the pipe and the threaded flange, ensuring a strong, leak-free connection.
Inspection and Testing: Inspect the weld for any defects or inconsistencies, and conduct pressure testing to verify the integrity of the connection.

Application of threaded flanges

ASME B16.5 threaded flanges are known to deliver exceptional performance and are generally developed to meet the demands. We offer a broad range of threaded flanges through a worldwide network of stock-keeping branches.

This threaded flange is used in various industries:

Threaded flanges used in Oil and Gas Pipelines;
Threaded flanges used in Chemical Industry;
Threaded flanges used in Plumbing;
Threaded flanges used in Heating;
Threaded flanges used in Water Supply Systems;
Threaded flanges used in Power Plants;
Threaded flanges used in the Paper & Pulp Industry;
Threaded flange uses in General Purpose Applications;
Threaded flanges used in Fabrication Industry;
Threaded flange uses in Food Processing Industry;
Threaded flanges Use in Structural Pipe.

Threaded Flange Vs Weld Neck Flange

Installation: Threaded flanges offer easier installation without the need for welding, while weld neck flanges require welding for a secure connection.
Pressure and temperature resistance: Weld neck flanges are suitable for high-pressure and high-temperature applications, while threaded flanges are limited to low-pressure and non-critical applications.
Cost: Threaded flanges are generally more affordable than weld neck flanges, due to their simpler design and lower material requirements.

Threaded Flange Vs Slip-On Flange

Installation: Both threaded and slip-on flanges offer relatively easy installation, with threaded flanges not requiring any welding, and slip-on flanges requiring minimal welding.
Pressure and temperature resistance: Slip-on flanges have a higher pressure and temperature resistance compared to threaded flanges but are still not suitable for high-pressure applications like weld neck flanges.
Support for heavy pipes: Slip-on flanges provide better support for heavy or large-diameter pipes compared to threaded flanges.

How do I choose between a threaded flange, weld neck flange, and slip-on flange?

The choice between these flanges depends on your specific application requirements, such as pressure and temperature conditions, installation ease, maintenance needs, and budget constraints. Understanding the advantages and disadvantages of each flange type will help you make an informed decision.

How to purchase the correct threaded flanges?

Are you in the market for threaded flanges but don’t know where to start? Don’t worry, you’re not alone. With so many options available, it can be overwhelming to choose the right flanges for your project. We’ll go over some key factors to consider when purchasing threaded flanges to ensure that you make the right decision.

Determine the Material Needed

The first step to purchasing the correct threaded flanges is to determine the material you need. These flanges are available in a variety of materials, including carbon steel, stainless steel, and alloy steel. The choice of material will depend on the specific application and environmental conditions. If you’re unsure which material to choose, consult with a qualified engineer or supplier to help guide you in making the right decision.

Identify the Flange Face Type

Flange face types refer to the surface finish of a flange, and there are many different types of flange face finishes, including flat face (FF), raised face (RF), ring-type joint (SO), tongue and groove (T&G), male and female face (M&F). Each type of flange face has its unique characteristics and is suitable for different applications.

Flat face (FF): This type of flange face has a flat, smooth surface that is perpendicular to the axis of the pipe. It is typically used for low-pressure applications and when the sealing is achieved by a gasket.
Raised face (RF): This type of flange face has a raised ring on the surface that surrounds the bolt holes. The ring provides a surface for the gasket to rest on, which helps to create a better seal. It is commonly used in applications with moderate pressure.
Ring joint face (RTJ): This type of flange face has a specially designed groove to accommodate a metallic ring gasket. The groove is cut into the surface of the flange, and the gasket sits in the groove to create a tight seal. This type of flange face is typically used in high-pressure applications.
Tongue and groove face (T&G): This type of flange face has a raised tongue on one flange and a matching groove on the other flange. The tongue fits into the groove, creating a tight seal without the need for a gasket. This type of flange face is often used in applications where high pressure and temperature are involved.
Male and Female Face (M&F): This type of flange face is similar to the tongue and groove face. However, it has a male and female end which creates a face to face contact between two flanges. This type of flange is mainly used for low pressure and low temperature applications.

To identify a specific flange face type, you need to provide me with more information, such as the flange’s application, dimensions, and material.

Determine the TH flange Size and Pressure Class

Once you have identified the material and threaded flange type, the next step is to determine the size and pressure class of the threaded flange. threaded flanges are available in various sizes and pressure ratings, and it’s crucial to select the correct size and pressure class to ensure that the flange can withstand the intended operating conditions. You should consult the system specifications and design to determine the appropriate size and pressure class.

Surface Finish

The flange face’s surface finish directly impacts the seal’s quality between the flanges. Common surface finishes include smooth, serrated, and grooved. Consult with the gasket manufacturer and consider the specific requirements of your application to select the most appropriate surface finish for your threaded flanges.

Look for Quality and Certifications

It’s essential to ensure that the threaded flanges you purchase are of high quality and come with the necessary certifications. Look for suppliers that have a reputation for delivering high-quality products, and check for relevant certifications, such as ISO 9001, API, and CE, to ensure that the flanges meet industry standards.

Consider the Price

While the price should not be the only factor to consider when purchasing threaded flanges, it’s important to compare prices from different suppliers to ensure that you’re getting a fair price. However, remember that the cheapest option may not always be the best quality, so ensure that you’re not compromising on quality in pursuit of lower costs.

Purchasing the correct threaded flanges can be challenging, but by considering the factors outlined in this post, you can ensure that you make an informed decision that meets your project requirements. Remember to consult with experts and compare suppliers to ensure that you’re getting a high-quality product at a fair price.

How to select threaded flanges manufacturer?

Selecting the right manufacturer for threaded flanges can be a daunting task. With so many options available, it’s easy to get overwhelmed and make the wrong choice. However, choosing the right manufacturer is critical to ensure that you get the best quality flanges that meet your specific needs. We provide some tips to help you select the right threaded flanges manufacturer.

Quality of Products

The first factor to consider when selecting a threaded flanges manufacturer is the quality of their products. You should look for a manufacturer that uses high-quality materials and follows strict quality control processes to ensure that their products meet the required standards.

Industry Experience

Another factor to consider is the manufacturer’s industry experience. Look for a manufacturer that has been in the industry for a significant period and has a proven track record of delivering high-quality products to their customers. An experienced manufacturer will have a better understanding of the market and the needs of their customers.

Production Capacity

It is also essential to consider the production capacity of the manufacturer. You should look for a manufacturer that has the capacity to produce the required quantity of flanges in a timely manner to meet your project’s needs.

Pricing

Pricing is another crucial factor to consider when selecting a threaded flanges manufacturer. While it is essential to look for a manufacturer that offers competitive pricing, it is equally important to consider the quality of their products. Don’t compromise on the quality of the products for the sake of saving a few dollars.

Customer Service

The final factor to consider is the manufacturer’s customer service. Look for a manufacturer that has excellent customer service and is willing to assist you with any queries or concerns you may have. A manufacturer that values their customers will provide a better overall experience.

Choosing the right threaded flanges manufacturer is essential to ensure you get high-quality products that meet your needs. Look for a manufacturer with quality certifications, experience, a good reputation, customization capabilities, and a competitive price. By following these tips, you will be able to find the right manufacturer for your flange needs.

Why Choose Guanxin to Be Your Threaded Flange Supplier?

Guanxin is a well-established and reputable manufacturer and supplier of threaded flanges that has been providing high-quality products to customers worldwide for many years. Here are some reasons why you might choose Guanxin to be your threaded flange supplier:

High-quality products: Guanxin is committed to providing high-quality threaded flanges made from the best materials and manufactured to the highest standards. The company has strict quality control procedures in place to ensure that each product meets or exceeds customer expectations.
Competitive pricing: Guanxin offers competitive pricing on its products, which means you can get high-quality threaded flanges at an affordable price.
Wide range of products: Guanxin offers a wide range of threaded flanges, including ANSI, DIN, JIS, EN, and other international standards. This means you can find the right product to meet your specific needs.
Excellent customer service: Guanxin is committed to providing excellent customer service and support to all of its customers. The company has a team of experienced professionals who are available to answer any questions or concerns you may have.
Fast delivery: Guanxin understands the importance of timely delivery and works hard to ensure that all orders are shipped out quickly and efficiently.

Guanxin is a reliable and trustworthy supplier of threaded flanges that can meet your needs and exceed your expectations.

FAQ:

What are the main differences between NPT and BSPT threaded flanges?
NPT and BSPT threaded flanges are similar in design, but NPT is based on American standards, while BSPT follows British standards. They have different thread angles and dimensions, which makes them incompatible with each other.
Can I use an NPT threaded flange with a Metric threaded pipe?
No, NPT and Metric threaded flanges are not interchangeable due to their different thread designs and dimensions. It is crucial to use compatible flanges and pipes to ensure a secure connection.
What factors should be considered when selecting gasket material for threaded flanges?
Factors to consider when choosing a gasket material include temperature, pressure, and the type of fluid being transported. The gasket material should be compatible with the application’s specific requirements.
What are the common flange face types for threaded flanges?
Common flange face types include flat face, raised face, and ring-type joint (RTJ) faces. Each flange face type is designed for specific sealing requirements and applications.
How can I ensure proper installation of threaded flanges and their sealing surfaces?
To ensure proper installation of threaded flanges and their sealing surfaces, follow these steps:

Select the appropriate flange type, size, and material based on the application requirements.
Choose a suitable gasket material compatible with the operating conditions (temperature, pressure, and fluid type).
Follow the manufacturer’s guidelines for torque values and tightening sequences.
Inspect the flange sealing surface for damage or irregularities before installation.
Maintain the correct surface finish on the sealing area for optimal sealing performance.

Export Country For threaded flanges

MIDDLE EAST	AFRICA	NORTH AMERICA	EUROPE	ASIA	SOUTH AMERICA
Saudi Arabia	Nigeria	USA	Russia	India	Argentina
Iran	Algeria	Canada	Norway	Singapore	Bolivia
Iraq	Angola	Mexico	Germany	Malaysia	Brazil
Uae	South Africa	Panama	France	Indonesia	Chile
Qatar	Libya	Costa Rica	Italy	Thailand	Venezuela
Bahrain	Egypt	Puerto Rica	UK	Vietnam	Colombia
Oman	Sudan	Trinidad And Tobago	Spain	South Korea	Ecuador
Kuwait	Equatorial Guinea	Jamaica	UKraine	Japan	Guyana
Turkey	The Republic Of Congo	Bahamas	Netherland	Sri Lanka	Paraguay
Yemen	Gabon	Denmark	Belgium	Maldives	Uruguay
Syria			Greece	Bangladesh
Jordan			Czech Republic	Myanmar
Cyprus			Portugal	Taiwan
			Hungary	Cambodia
			Albania
			Austria
			Switzerland
			Slovakia
			Finland
			Ireland
			Croatia
			Slovenia
			Malta