Understanding your choice of Socket Weld Flanges options
Understanding your options for socket weld flanges is essential to make an informed decision ensuring your industrial systems’ efficiency, safety, and longevity. Consider materials, sizes, pressure ratings, standards, installation and maintenance practices, and supplier selection when choosing the right socket weld flange for your application. Following these guidelines can optimize your systems and achieve reliable performance.
What is a Socket Weld Flange?
Socket weld flange simplified as SW flange. A socket weld flange is a type of flange that uses a socket weld connection to join pipes or valves. It features a raised, tapered shoulder on the inside diameter of the flange, where the pipe is inserted and welded. The socket weld flange provides a secure connection and ensures proper alignment between the mating components. This flange type is suitable for small-diameter pipes, high-pressure applications, and situations where vibration or thermal expansion is a concern.
| Advantages of Socket Weld Flanges | Disadvantages of Socket Weld Flanges |
|
Socket weld flanges offer several benefits, including:
|
Socket weld flanges also have some disadvantages:
|
Types of Socket Weld Flanges
Socket weld flanges are an indispensable component of many industrial piping systems. With various types to choose from, including raised face, flat face, ring-type joint, reducing, and orifice flanges. By understanding the differences between these flanges, you can select the most suitable option for your particular needs and ensure the reliability and efficiency of your piping systems.
Raised Face Socket Weld Flange
Raised face socket weld flanges (RF SWF) are known for exceptional performance under high-pressure conditions. The raised face design ensures a tight seal and reduces the chances of leakage. This flange type is easy to install and requires minimal maintenance, making it a cost-effective solution for various industries.
Flat Face Socket Weld Flange
Flat face socket weld flanges (FF SWF) offer a smooth, flat surface, which helps distribute pressure evenly across the flange. This design reduces the risk of warping and ensures a long-lasting, reliable connection. Flat face flanges are more affordable and easier to manufacture than other flange types.
Ring-Type Joint Socket Weld Flange
Ring-type joint socket weld flanges (RTJ SWF) feature a unique groove design, accommodating a metal ring gasket to create a high-integrity seal. This flange can handle extreme pressures and temperatures, ensuring a leak-proof connection even in the most demanding conditions.
Reducing Socket Weld Flange
Reducing socket weld flanges (R SWF) allows easy transition between pipe sizes, eliminating additional fittings. This design simplifies the piping system and reduces the overall cost. Reducing flanges also provide a strong, leak-proof connection, ensuring the safety and reliability of the system.
Orifice Socket Weld Flange
Orifice socket weld flanges (O SWF) are specifically designed for flow measurement applications. These flanges have a built-in orifice plate that measures fluid flow rates, making it possible to monitor and control the flow of liquids or gases accurately. Orifice flanges provide reliable sealing and maintain consistent performance under varying pressure and temperature conditions.
What is the primary purpose of a socket weld flange?
Socket weld flanges create solid and leak-proof connections in piping systems. They’re particularly effective in high-pressure applications and provide a durable, long-lasting seal.
Which type of socket weld flange is best for high-pressure applications?
Raised face and ring-type joint socket weld flanges are well-suited for high-pressure applications due to their excellent sealing capabilities and ability to withstand extreme pressures and temperatures.
Can I use a flat face socket weld flange for high-pressure applications?
Flat face socket weld flanges are generally more suitable for low-pressure applications, as their design may need to be revised to handle the stress associated with high-pressure systems.
What is the main difference between a reducing socket weld flange and a standard socket weld flange?
A reducing socket weld flange allows connecting pipes of different sizes, while a standard socket weld flange connects pipes of the same size.
Standard for Socket Weld 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 SW flanges are governed by the following standards:
- ANSI B16.5 SW Flange
- DIN SW Flange
- EN 1092-1 SW Flange
- BS 4504 SW Flange
- UNI SW Flange
- SANS 1123 SW Flange
- GOST/ГОСТ 33259 SW Flange
- ANSI B16.47 SW Flange
- JIS B2220 SW Flange
- KOREA SW Flange
- BS 10 SW Flange
- AWWA C207 SW Flange
- ISO SW Flange
- MSZ SW Flange
- Australian SW Flange
- French NFE SW Flange
- Norwegian NS SW Flange
Materials of Socket Weld Flanges
Depending on the specific application requirements, Socket Weld Flanges are made from a variety of metal materials, including:
| Titanium Socket Weld 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 Socket Weld 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 Socket Weld Flange | ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640 |
| Carbon Steel Socket Weld 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 Socket Weld 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 Socket Weld Flange | ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91 |
| Hastelloy Socket Weld Flange | ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X |
| Brass Socket Weld Flange | 3602 / 2604 / H59 / H62 / etc. |
| Inconel Socket Weld Flange | ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 |
| Monel Socket Weld Flange | ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500) |
| Duplex Socket Weld Flange | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Super Duplex Socket Weld Flange | S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Alloy 20 Socket Weld Flange | ASTM B462 / ASME SB462, Carpenter 20 Alloy, Alloy 20Cb-3 |
| Aluminium Socket Weld Flange | 5052 /6061/ 6063 / 2017 / 7075 / etc. |
| Nickel Socket Weld Flange | ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC |
| Nimonic Socket Weld Flange | Nimonic 75, Nimonic 80A, Nimonic 90 |
| Other Socket Weld Flange material | Tin bronze, Alumunum bronze, Lead bronze |
| Incoloy Socket Weld Flange | ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 |
| 254 Smo Socket Weld Flange | ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547 |
Selecting the Right Socket Weld Flange Material
- Material selection is crucial when choosing Socket Weld Flanges for your piping system. Factors to consider include corrosion resistance, temperature, and pressure requirements. Common materials used for Socket Weld 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 Socket Weld Flanges
Understanding the dimensions of socket weld flanges is essential for adequately selecting, installing, and maintaining piping systems. Key dimensions include size, pressure rating, flange diameter, bolt circle diameter, number of bolt holes, socket diameter, and other measurements related to the flange’s geometry. By selecting the appropriate socket weld flange dimensions based on industry standards like ASME B16.5, EN 1092-1, MSS SP-44, or BS 4504, you can ensure the compatibility and optimal performance of your piping system.
Several critical dimensions must be considered when selecting a socket weld flange:
- Flange Diameter (D): The overall diameter of the flange, which determines the space required for the flange’s installation.
- Bolt Circle Diameter (BCD): The diameter of the circle that passes through the center of the bolt holes, crucial for proper alignment and bolting of the flange.
- Number of Bolt Holes: The number of bolt holes varies depending on the size and pressure rating of the flange.
- Bolt Hole Diameter: The diameter of the holes that accommodate the flange’s bolts.
- Socket Diameter (Bore): The diameter of the flange’s socket, which should match the pipe’s outer diameter.
- Socket Depth: The depth of the flange’s socket, which affects the engagement of the pipe and the strength of the connection.
- Raised Face Diameter: For raised face socket weld flanges, the diameter of the raised face is an essential dimension to ensure proper sealing.
- Raised Face Thickness: For raised face socket weld flanges, the thickness of the raised face affects the gasket’s compression and the overall sealing performance.
- Flange Thickness (T): The thickness of the flange is critical for its ability to withstand pressure and maintain structural integrity.
- Hub Diameter (HD): The diameter of the flange’s hub, which is the section that transitions from the flange face to the socket. This dimension affects the flange’s strength and flexibility.
- Neck Diameter (ND): The diameter of the neck, which is the narrowest part of the flange where the pipe is inserted. This dimension is essential for ensuring proper fit and alignment with the pipe.
- Socket Weld Gap: The gap between the pipe’s end and the bottom of the socket in a socket weld flange. This gap allows for thermal expansion and reduces the risk of cracking due to temperature changes.
Size of socket weld flanges
Socket weld flanges are available in various sizes to accommodate different pipe diameters. The size of a socket weld flange is typically denoted by its nominal pipe size (NPS), which ranges from 1/2″ to 24″. The NPS is not a direct measurement of the flange’s diameter but rather an indication of the pipe size it’s designed to fit.
Pressure Ratings of socket weld flanges
Pressure ratings for socket weld flanges are indicated by their class. The class determines the flange’s ability to withstand pressure and temperature. Common pressure ratings include:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
Higher class ratings correspond to flanges designed for higher pressure and temperature applications.
Dimensional Standards of socket weld flanges
Several organizations have established dimensional standards for socket weld flanges to ensure compatibility and consistency across various manufacturers. Some of the most common standards include:
ASME B16.5
The ASME B16.5 standard covers the dimensions, tolerances, and markings for socket weld flanges in sizes NPS 1/2″ to NPS 24″ and pressure classes ranging from 150 to 2500. This standard is widely adopted in the United States and globally.
EN 1092-1
The EN 1092-1 standard specifies dimensions and tolerances for socket weld flanges used in European countries. It covers flanges with pressure designations PN 2.5 to PN 400, equivalent to pressure classes ranging from 150 to 2500.
MSS SP-44
The MSS SP-44 standard covers socket weld flanges in sizes NPS 12″ and larger. This standard is often used in conjunction with ASME B16.5 for flanges in larger sizes and higher pressure ratings.
BS 4504
The BS 4504 standard is a British standard for socket weld flanges, covering flanges with pressure designations ranging from PN 2.5 to PN 40. While this standard has been replaced by EN 1092-1 in most European countries, it is still used in some applications.
Dimensions of ANSI/ASME B16.5 Socket Welding Flange (class150lb-1500lb)
Dimensions of ANSI/ASME B16.5 Socket Welding Flange Class 150lbs
|
Pipe |
Flange |
Hub |
Raised Face |
Drilling Data |
Weight |
||||||||
|
NominalPipe Size |
|||||||||||||
|
Outside Diameter |
Overall Diameter |
Inside Diameter |
FlangeThickness min |
Overall Length |
Socket Diameter |
Depthof Socket |
Hub Diameter |
Face Diameter |
No. of |
Bolt Hole Diameter |
Diameter of Circle of Holes |
kg/piece |
|
|
in |
in |
in |
in |
in |
in |
in |
in |
in |
Holes |
in |
in |
||
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
|
1/2 |
0.840 21.30 |
3.500 88.90 |
0.620 15.70 |
0.440 11.20 |
0.620 15.70 |
0.880 22.40 |
0.380 9.600 |
1.190 30.20 |
1.380 35.10 |
4 |
0.620 15.70 |
2.380 60.45 |
0.42 |
|
3/4 |
1.050 26.70 |
3.880 98.60 |
0.820 20.80 |
0.500 12.70 |
0.620 15.70 |
1.090 27.70 |
0.440 11.10 |
1.500 38.10 |
1.690 42.90 |
4 |
0.620 15.70 |
2.750 69.85 |
0.59 |
|
1 |
1.315 33.40 |
4.250 108.0 |
1.050 26.70 |
0.560 14.20 |
0.690 17.50 |
1.360 34.50 |
0.500 12.70 |
1.940 49.30 |
2.000 50.80 |
4 |
0.620 15.70 |
3.120 79.25 |
0.81 |
|
11/4 |
1.660 42.20 |
4.620 117.3 |
1.380 35.10 |
0.620 15.70 |
0.810 20.60 |
1.700 43.20 |
0.560 14.20 |
2.310 58.70 |
2.500 63.50 |
4 |
0.620 15.70 |
3.500 88.90 |
1.07 |
|
11/2 |
1.900 48.30 |
5.000 127.0 |
1.610 40.90 |
0.690 17.50 |
0.880 22.30 |
1.950 49.50 |
0.620 15.70 |
2.560 65.00 |
2.880 73.15 |
4 |
0.620 15.70 |
3.880 98.60 |
1.36 |
|
2 |
2.375 60.30 |
6.000 152.4 |
2.070 52.60 |
0.750 19.10 |
1.000 25.40 |
2.440 62.00 |
0.690 17.50 |
3.060 77.70 |
3.620 91.90 |
4 |
0.750 19.10 |
4.750 120.7 |
2.10 |
|
21/2 |
2.875 73.00 |
7.000 177.8 |
2.470 62.70 |
0.880 22.40 |
1.120 28.40 |
2.940 74.70 |
0.750 19.00 |
3.560 90.40 |
4.120 104.6 |
4 |
0.750 19.10 |
5.500 139.7 |
3.33 |
|
3 |
3.500 88.90 |
7.500 190.5 |
3.070 78.00 |
0.940 23.90 |
1.190 30.20 |
3.570 90.70 |
0.810 20.60 |
4.250 108.0 |
5.000 127.0 |
4 |
0.750 19.10 |
6.000 152.4 |
3.90 |
Dimensions of ANSI/ASME B16.5 Socket Welding Flange Class 300lbs
|
Pipe |
Flange |
Hub |
Raised Face |
Drilling Data |
Weight |
||||||||
|
NominalPipe Size |
|||||||||||||
|
Outside Diameter |
Overall Diameter |
Inside Diameter |
FlangeThickness min |
Overall Length |
Socket Diameter |
Depthof Socket |
Hub Diameter |
Face Diameter |
No. of |
Bolt Hole Diameter |
Diameter of Circle of Holes |
kg/piece |
|
|
in |
in |
in |
in |
in |
in |
in |
in |
in |
Holes |
in |
in |
||
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
|
1/2 |
0.840 21.30 |
3.750 95.20 |
0.620 15.70 |
0.560 14.20 |
0.880 22.30 |
0.880 22.40 |
0.380 9.600 |
1.500 38.10 |
1.380 35.10 |
4 |
0.620 15.70 |
2.620 66.55 |
0.66 |
|
3/4 |
1.050 26.70 |
4.620 117.3 |
0.820 20.80 |
0.620 15.70 |
1.000 25.40 |
1.090 27.70 |
0.440 11.10 |
1.880 47.70 |
1.690 42.90 |
4 |
0.750 19.10 |
3.250 82.50 |
1.15 |
|
1 |
1.315 33.40 |
4.880 123.9 |
1.050 26.70 |
0.690 17.50 |
1.060 26.90 |
1.360 34.50 |
0.500 12.70 |
2.120 53.80 |
2.000 50.80 |
4 |
0.750 19.10 |
3.500 88.90 |
1.40 |
|
11/4 |
1.660 42.20 |
5.250 133.3 |
1.380 35.10 |
0.750 19.00 |
1.060 26.90 |
1.700 43.20 |
0.560 14.20 |
2.500 63.50 |
2.500 63.50 |
4 |
0.750 19.10 |
3.880 98.60 |
1.75 |
|
11/2 |
1.900 48.30 |
6.120 155.4 |
1.610 40.90 |
0.810 20.60 |
1.190 30.20 |
1.950 49.50 |
0.620 15.70 |
2.750 69.85 |
2.880 73.15 |
4 |
0.880 22.30 |
4.500 114.3 |
2.55 |
|
2 |
2.375 60.30 |
6.500 165.1 |
2.070 52.60 |
0.880 22.30 |
1.310 33.20 |
2.440 62.00 |
0.690 17.50 |
3.310 84.00 |
3.620 91.90 |
8 |
0.750 19.10 |
5.000 127.0 |
2.93 |
|
21/2 |
2.875 73.00 |
7.500 190.5 |
2.470 62.70 |
1.000 25.40 |
1.500 38.10 |
2.940 74.70 |
0.750 19.00 |
3.940 100.0 |
4.120 104.6 |
8 |
0.880 22.30 |
5.880 149.3 |
4.40 |
|
3 |
3.500 88.90 |
8.250 209.5 |
3.070 78.00 |
1.120 28.40 |
1.690 42.90 |
3.570 90.70 |
0.810 20.60 |
4.620 117.3 |
5.000 127.0 |
8 |
0.880 22.30 |
6.620 168.1 |
5.92 |
Notes
- Dimension B corresponds to the pipe inside diameter. Values quoted assume 40S/Standard wall thickness.
- Weights are based on manufacturer’s data and are approximate.
Dimensions of ANSI/ASME B16.5 Socket Welding Flange Class Class 600 lbs
|
Pipe |
Flange |
Hub |
Raised Face |
Drilling Data |
Weight |
||||||||
|
NominalPipe Size |
|||||||||||||
|
Outside Diameter |
Overall Diameter |
Inside Diameter |
FlangeThickness min |
Overall Length |
Socket Diameter |
Depthof Socket |
Hub Diameter |
Face Diameter |
No. of |
Bolt Hole Diameter |
Diameter of Circle of Holes |
kg/piece |
|
|
in |
in |
in |
in |
in |
in |
in |
in |
in |
Holes |
in |
in |
||
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
|
1/2 |
0.840 21.30 |
3.750 95.20 |
0.560 14.20 |
0.880 22.30 |
0.880 22.40 |
0.380 9.600 |
1.500 38.10 |
1.380 35.10 |
4 |
0.620 15.70 |
2.620 66.55 |
0.76 |
|
|
3/4 |
1.050 26.70 |
4.620 117.3 |
0.620 15.70 |
1.000 25.40 |
1.090 27.70 |
0.440 11.10 |
1.880 47.70 |
1.690 42.90 |
4 |
0.750 19.10 |
3.250 82.50 |
1.29 |
|
|
1 |
1.315 33.40 |
4.880 123.9 |
d by |
0.690 17.50 |
1.060 26.90 |
1.360 34.50 |
0.500 12.70 |
2.120 53.80 |
2.000 50.80 |
4 |
0.750 19.10 |
3.500 88.90 |
1.55 |
|
11/4 |
1.660 42.20 |
5.250 133.3 |
ecifiechaser |
0.810 20.60 |
1.120 28.40 |
1.700 43.20 |
0.560 14.20 |
2.500 63.50 |
2.500 63.50 |
4 |
0.750 19.10 |
3.880 98.60 |
2.06 |
|
11/2 |
1.900 48.30 |
6.120 155.4 |
the Pube spr |
0.880 22.30 |
1.250 31.75 |
1.950 49.50 |
0.620 15.70 |
2.750 69.85 |
2.880 73.15 |
4 |
0.880 22.30 |
4.500 114.3 |
3.00 |
|
2 |
2.375 60.30 |
6.500 165.1 |
To |
1.000 25.40 |
1.440 36.60 |
2.440 62.00 |
0.690 17.50 |
3.310 84.00 |
3.620 91.90 |
8 |
0.750 19.10 |
5.000 127.0 |
3.67 |
|
21/2 |
2.875 73.00 |
7.500 190.5 |
1.120 28.40 |
1.620 41.10 |
2.940 74.70 |
0.750 19.00 |
3.940 100.0 |
4.120 104.6 |
8 |
0.880 22.30 |
5.880 149.3 |
5.35 |
|
|
3 |
3.500 88.90 |
8.250 209.5 |
1.250 31.75 |
1.810 46.00 |
3.570 90.70 |
0.810 20.60 |
4.620 117.3 |
5.000 127.0 |
8 |
0.880 22.30 |
6.620 168.1 |
7.06 |
|
Dimensions of ANSI/ASME B16.5 Socket Welding Flange Class Class 1500 lbs
|
Pipe |
Flange |
Hub |
Raised Face |
Drilling Data |
Weight |
||||||||
|
NominalPipe Size |
|||||||||||||
|
Outside Diameter |
Overall Diameter |
Inside Diameter |
FlangeThickness min |
Overall Length |
Socket Diameter |
Depthof Socket |
Hub Diameter |
Face Diameter |
No. of |
Bolt Hole Diameter |
Diameter of Circle of Holes |
kg/piece |
|
|
in |
in |
in |
in |
in |
in |
in |
in |
in |
Holes |
in |
in |
||
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
|
1/2 |
0.840 21.30 |
4.750 120.6 |
0.880 22.30 |
1.250 31.70 |
0.880 22.40 |
0.380 9.600 |
1.500 38.10 |
1.380 35.10 |
4 |
0.880 22.30 |
3.250 82.50 |
1.80 |
|
|
3/4 |
1.050 26.70 |
5.120 130.0 |
byr |
1.000 25.40 |
1.380 35.00 |
1.090 27.70 |
0.440 11.10 |
1.750 44.40 |
1.690 42.90 |
4 |
0.880 22.30 |
3.500 88.90 |
2.41 |
|
1 |
1.315 33.40 |
5.880 149.3 |
i |
1.120 28.40 |
1.620 41.10 |
1.360 34.50 |
0.500 12.70 |
2.060 52.30 |
2.000 50.80 |
4 |
1.000 25.40 |
4.000 101.6 |
3.55 |
|
11/4 |
1.660 42.20 |
6.250 158.7 |
spechasefied |
1.120 28.40 |
1.620 41.10 |
1.700 43.20 |
0.560 14.20 |
2.500 63.50 |
2.500 63.50 |
4 |
1.000 25.40 |
4.380 111.2 |
4.02 |
|
11/2 |
1.900 48.30 |
7.000 177.8 |
To be the Purc |
1.250 31.75 |
1.750 44.50 |
1.950 49.50 |
0.620 15.70 |
2.750 69.85 |
2.880 73.15 |
4 |
1.120 28.40 |
4.880 123.9 |
5.45 |
|
2 |
2.375 60.30 |
8.500 215.9 |
1.500 38.10 |
2.250 57.15 |
2.440 62.00 |
0.690 17.50 |
4.120 104.6 |
3.620 91.90 |
8 |
1.000 25.40 |
6.500 165.1 |
10.2 |
|
|
21/2 |
2.875 73.00 |
9.620 244.3 |
1.620 41.10 |
2.500 63.50 |
2.940 74.70 |
0.750 19.00 |
4.880 123.9 |
4.120 104.6 |
8 |
1.120 28.40 |
7.500 190.5 |
13.9 |
|
Notes
- Class 400 socket weld flanges may be provided in NPS 1/2 to 21/2 using Class 600 dimensions.
- Dimension B corresponds to the pipe inside diameter. Values quoted assume 40S/Standard wall thickness.
- Weights are based on manufacturer’s data and are approximate.
Tolerances on flange dimensions (ASME/ANSI B16.5 and B16.47, and MSS SP-44)
| Dimension | Range | Tolerance | |
| in | mm | ||
| General and Blind Flanges (For blind flange dimensions see page 8-23 for B16.5, page 8-46 for B16.47 Series A / MSS SP-44 and page 8-51 for B16.47 Series B / API 605): | |||
| G (raised face diameter) | < NPS 24 | ±0.03 | ±0.76 |
| > NPS 26, with 0.06 in raised face | ±0.08 | ±2.03 | |
| > NPS 26, with0.25 in raised face | ±0.04 | ±1.02 | |
| I (bolt hole diameter) | All | No tolerance in B16.5 or B16.47 | |
| J (bolt circle diameter) | All | ±0.06 | ±1.52 |
| Centre to centre of adjacent bolt holes | All | ±0.03 | ±0.76 |
| Eccenticity of bolt circleand machined facing diameters | < NPS 21/2 | ±0.03 | ±0.76 |
| > NPS 3 | ±0.06 | ±1.52 | |
| Weld Neck Flanges 1 (For dimensions see page 8-10 for B16.5, page 8-46 for B16.47 Series A / MSS SP-44 and page 8-51 for B16.47 Series B / API 605): | |||
| D (overall length) | < NPS 4 | 0.06 | 1.52 |
| NPS 5 to 10 | +0.06, -0.12 | +1.52, -3.05 | |
| NPS 12 to 24 | +0.12, -0.18 | +3.05, -4.57 | |
| > NPS 26 | ±0.19 | ±4.83 | |
| Thickness of hub | All | > 87.5% of pipe nominal wall thickness | |
| Slip on (see page 8-17), Lap Joint (see page 8-32 for dimensions) and Socket Welding (see page 8-30 fordimensions) Flanges: | |||
| B (inside diameter, or bore) | < NPS 10 | +0.03, -0.0 | +0.76, -0.0 |
| > NPS 12 | +0.06, -0.0 | +1.52, -0.0 | |
| Threaded Flanges (see page 8-40 for dimensions): | |||
| B (counterbore)(Not applicable forClass 150 lb) | < NPS 10 | +0.03, -0.0 | +0.76, -0.0 |
| > NPS 12 | +0.06, -0.0 | +1.52, -0.0 | |
Manufacturing Process of Socket Weld Flanges
Socket Weld 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 Socket Weld 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)
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
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℃.
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.
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.
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.
Marking of Socket Weld Flanges
- Flange size
- Pressure rating
- Material specification
- Tag number
- Manufacturer’s name or trademark
- Heat number or lot number
- Date of manufacture
Packing of Socket Weld Flanges
Inspection and Measurement of Socket Weld Flanges
There are several factors that need to be considered when inspecting and measuring Socket Weld Flanges, including:
To inspect and measure Socket Weld 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.
Socket Weld 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 Socket Weld 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 Socket Weld 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 Socket Weld Flanges
ASME B16.5 Socket Weld Flanges are known to deliver exceptional performance and are generally developed to meet the demands. We offer a broad range of Socket Weld Flanges through a worldwide network of stock-keeping branches.
This Socket Weld Flange is used in various industries:
-
Socket Weld Flanges used in Oil and Gas Pipelines;
-
Socket Weld Flanges used in Chemical Industry;
-
Socket Weld Flanges used in Plumbing;
-
Socket Weld Flanges used in Heating;
-
Socket Weld Flanges used in Water Supply Systems;
-
Socket Weld Flanges used in Power Plants;
-
Socket Weld Flanges used in the Paper & Pulp Industry;
-
Socket Weld Flange uses in General Purpose Applications;
-
Socket Weld Flanges used in Fabrication Industry;
-
Socket Weld Flange uses in Food Processing Industry;
-
Socket Weld Flanges Use in Structural Pipe.
Slip-On Flanges VS Socket Weld Flanges
SO flanges and SW Flanges have some similarities and differences, as shown below:
| Comparison Criteria | Socket Weld Flanges | Slip-On Flanges |
| Key Features | Recessed socket, fillet weld | Larger diameter, double fillet weld |
| Advantages | High strength, leakage prevention, alignment precision, compact design | Ease of installation, cost-effective, versatility, reduced stress concentration |
| Disadvantages | Limited pipe size, welding complexity, higher cost | Lower pressure rating, alignment challenges, potential leakage |
| Suitable Applications | High-pressure systems (steam lines, hydraulic systems, chemical processing plants) | Low to moderate pressure applications (water treatment plants, HVAC systems, fire protection systems) |
How to purchase the correct Socket Weld Flanges?
- 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.
Once you have identified the material and Socket Weld Flange type, the next step is to determine the size and pressure class of the Socket Weld Flange. Socket Weld 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 Socket Weld Flanges.
How to select Socket Weld Flanges manufacturer?
Choosing the right Socket Weld 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 Jihua to Be Your Socket Weld Flange Supplier?
Jihua is a well-established and reputable manufacturer and supplier of Socket Weld Flanges that has been providing high-quality products to customers worldwide for many years. Here are some reasons why you might choose Jihua to be your Socket Weld Flange supplier:
- High-quality products: Jihua is committed to providing high-quality Socket Weld 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: Jihua offers competitive pricing on its products, which means you can get high-quality Socket Weld Flanges at an affordable price.
- Wide range of products: Jihua offers a wide range of Socket Weld 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: Jihua 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: Jihua understands the importance of timely delivery and works hard to ensure that all orders are shipped out quickly and efficiently.
Export Country For Socket Weld 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 | Mayanmar | |||
| Cyprus | Portugal | Taiwan | |||
| Hungary | Cambodia | ||||
| Albania | |||||
| Austria | |||||
| Switzerland | |||||
| Slovakia | |||||
| Finland | |||||
| Ireland | |||||
| Croatia | |||||
| Slovenia | |||||
| Malta |