Orifice Flanges

Understanding your choice of orifice flanges options

When it comes to choosing the right type of orifice flange for your application, you need to consider several factors. Orifice flanges are used to measure the flow rate of fluids in a pipeline, and the right choice of the flange can make a big difference in the accuracy and reliability of your measurements. In this article, we will explore some key factors to consider when choosing orifice flanges and help you decide which option suits your needs.

What are orifice flanges?

Orifice flanges are special flanges used to measure the flow rate of fluids in pipelines. They consist of a pair of flanges, an orifice plate, and bolts to connect the flanges. The orifice plate has a hole in the center, which creates a restriction in the flow path, causing a pressure drop across the plate. The pressure drop is proportional to the flow rate of the fluid and can be measured using a differential pressure transmitter.

Types of Orifice Flanges

There are two types of orifice flanges based on the location of the orifice plate:
Concentric Orifice Flanges
Concentric orifice flanges have an orifice plate with a hole in the center, which is concentric with the pipe bore. These flanges are used for measuring the flow rate of clean fluids such as water, gas, and steam.
Eccentric Orifice Flanges
Eccentric orifice flanges have an orifice plate with a hole that is not concentric with the pipe bore. These flanges are used for measuring the flow rate of fluids that contain solids or entrained gases, such as slurry or wastewater.

Quality Standard for Orifice flanges

To ensure that orifice flanges meet the highest quality standards, several standards organizations have developed design, manufacture, and testing guidelines. The following are some of the most widely recognized quality standards for orifice flanges.
ASME B16.36 Standard
The American Society of Mechanical Engineers (ASME) B16.36 standard covers orifice flanges with raised faces and weld neck connections. It specifies the dimensions, materials, pressure ratings for these flanges, and tolerances for the orifice plate and the flange face. The standard also provides guidelines for the installation and maintenance of orifice flanges.
ASME B16.5 Standard
The ASME B16.5 standard covers orifice flanges with flat faces and other connections, including slip-on, threaded, and socket weld. Like the B16.36 standard, it specifies these flanges’ dimensions, materials, and pressure ratings. It also provides guidelines for the installation and maintenance of orifice flanges.
MSS SP-44 Standard
The Manufacturers Standardization Society (MSS) SP-44 standard covers orifice flanges with ring-type joint (RTJ) connections. It specifies the dimensions, materials, pressure ratings for these flanges, and tolerances for the orifice plate and the flange face. The standard also provides guidelines for the installation and maintenance of orifice flanges.

Materials of Orifice flanges

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

Titanium Orifice 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 Orifice 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 Orifice flange	ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Carbon Steel Orifice 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 Orifice 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 Orifice flange	ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Hastelloy Orifice flange	ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X
Brass Orifice flange	3602 / 2604 / H59 / H62 / etc.
Inconel Orifice flange	ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750
Monel Orifice flange	ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Duplex Orifice flange	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Orifice flange	S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Alloy 20 Orifice flange	ASTM B462 / ASME SB462, Carpenter 20 Alloy, Alloy 20Cb-3
Aluminium Orifice flange	5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel Orifice flange	ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Nimonic Orifice flange	Nimonic 75, Nimonic 80A, Nimonic 90
Other Orifice flange material	Tin bronze, Alumunum bronze, Lead bronze
Incoloy Orifice flange	ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925
254 Smo Orifice flange	ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547

Sizes for Orifice flanges

Orifice flanges are available in different sizes, ranging from 1/2 inch to 24 inches. The size of the orifice flange is determined by the size of the pipe to which it will be connected. The most common sizes of orifice flanges are 2-inch, 3-inch, 4-inch, 6-inch, 8-inch, 10-inch, 12-inch, and 14-inch. Each size has its own unique features and applications.

Dimensions of Orifice flanges

Industry standards, such as ASME B16.36 and MSS SP-44 manufacture Orifice flanges. These standards define the dimensions of orifice flanges, including the flange size, pressure rating, bolt circle diameter, and the number and size of bolt holes.

Flange Size

Orifice flanges are available in various sizes, from 1/2 inch to 24 inches. The size of the orifice flange you choose will depend on the size of the pipe it will be installed on and the flow rate of the fluid.

Pressure Rating

Orifice flanges are designed to withstand specific pressure ratings. The pressure rating of an orifice flange is determined by its class, defined by ASME B16.5. The pressure rating of an orifice flange ranges from 150 to 2500 pounds per square inch (PSI).

Bolt Circle Diameter

An orifice flange’s bolt circle diameter is the circle’s diameter that passes through the center of each bolt hole. The flange size and the number of bolt holes determine the bolt circle diameter. Orifice flanges have bolt circle diameters ranging from 2.75 inches to 21.25 inches.

Bolt Hole Size and Number

Their size and pressure rating determines the number and size of bolt holes in an orifice flange. Orifice flanges are available with bolt holes ranging in size from 1/2 inch to 2 inches, and the number of bolt holes ranges from 4 to 24.

Dimensions of Class 300 Orifice Flange (Weld Neck Raised Face)

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	Welding Neck Length	RF Dia.	RF Height	PCD	Orifice Hole dia	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	F	G	H	I
1	25	125	36.6	54	33.4	81	50.8	2	88.9	6.4	4	5/8	125	3/4	M16	4.5
1 1/2	40	155	36.6	70	48.3	84	73	2	114.3	6.4	4	3/4	135	7/8	M20	6.5
2	50	165	36.6	84	60.3	84	92.1	2	127	6.4	8	5/8	125	3/4	M16	7
2 1/2	65	190	36.6	100	73	87	104.8	2	149.2	6.4	8	3/4	135	7/8	M20	7.5
3	80	210	36.6	117	88.9	87	127	2	168.3	9.5	8	3/4	135	7/8	M20	9.4
4	100	255	36.6	146	114.3	90	157.2	2	200	12.7	8	3/4	135	7/8	M20	13.2
6	150	320	36.6	206	168.3	98	215.9	2	269.9	12.7	12	3/4	135	7/8	M20	14.6
8	200	380	39.7	260	219.1	110	269.9	2	330.2	12.7	12	7/8	145	1	M24	30
10	250	445	46.1	321	273	116	323.8	2	387.3	12.7	16	1	165	1 1/8	M27	41
12	300	520	49.3	375	323.8	129	381	2	450.8	12.7	16	1 1/8	180	1 1/4	M30	62
14	350	585	52.4	425	355.6	141	412.8	2	514.4	12.7	20	1 1/8	185	1 1/4	M30	84
16	400	650	55.6	483	406.4	144	469.9	2	571.5	12.7	20	1 1/4	195	1 3/8	M33	111
18	450	710	58.8	533	457	157	533.4	2	628.6	12.7	24	1 1/4	205	1 3/8	M33	138
20	500	775	62	587	508	160	584.2	2	685.8	12.7	24	1 1/4	215	1 3/8	M33	171
24	600	915	68.3	702	610	167	692.2	2	812.8	12.7	24	1 1/2	240	1 5/8	M39	247

	Dimensions of Class 600 Orifice Flange (Weld Neck Raised Face)  

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	Welding Neck Length	RF Dia.	RF Height	PCD	Orifice Hole dia	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	F	G	H	I
1	25	125	36.6	54	33.5	81	50.8	7	88.9	6.4	4	5/8	125	3/4	M16	5.5
1 1/2	40	155	36.6	70	48.3	84	73	7	114.3	6.4	4	3/4	135	7/8	M20	7.8
2	50	165	36.6	84	60.3	84	92.1	7	127	6.4	8	5/8	125	3/4	M16	8.3
2 1/2	65	190	36.6	100	73	87	104.8	7	149.2	6.4	8	3/4	135	7/8	M20	10.8
3	80	210	36.6	117	88.9	87	127	7	168.3	9.5	8	3/4	135	7/8	M20	12.6
4	100	275	38.1	152	114.3	102	157.2	7	215.9	12.7	8	7/8	150	1	M24	19
6	150	355	47.7	222	168.3	117	215.9	7	292.1	12.7	12	1	180	1 1/8	M27	37
8	200	420	55.6	273	219.1	133	269.9	7	349.2	12.7	12	1 1/8	195	1 1/4	M30	53
10	250	510	63.5	343	273	152	323.8	7	431.8	12.7	16	1 1/4	220	1 3/8	M33	86
12	300	560	66.7	400	323.8	156	381	7	489	12.7	20	1 1/4	230	1 3/8	M33	102
14	350	605	69.9	432	355.6	165	412.8	7	527	12.7	20	1 3/8	240	1 1/2	M36	150
16	400	685	76.2	495	406.4	178	469.9	7	603.2	12.7	20	1 1/2	260	1 5/8	M39	190
18	450	745	82.6	546	457.2	184	533.4	7	654	12.7	20	1 5/8	280	1 3/4	M42	240
20	500	815	88.9	610	508	190	584.2	7	723.9	12.7	24	1 5/8	300	1 3/4	M42	295
24	600	940	101.6	718	609.6	203	692.2	7	838.2	12.7	24	1 7/8	335	2	M48	365

Dimensions of Class 900 Orifice Flange (Weld Neck Raised Face)

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	Welding Neck Length	RF Dia.	RF Height	PCD	Orifice Hole dia	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	F	G	H	I
1	25	150	38.1	52	33.5	83	50.8	7	101.6	6.4	4	7/8	150	1	M24	5.4
1 1/2	40	180	38.1	70	48.3	89	73	7	123.8	6.4	4	1	160	1 1/8	M27	7.8
2	50	215	38.1	105	60.3	102	92.1	7	165.1	6.4	8	7/8	150	1	M30	11.5
2 1/2	65	245	41.3	124	73	105	104.8	7	190.5	6.4	8	1	165	1 1/8	M27	15.8
3	80	240	38.1	127	88.9	102	127	7	190.5	9.5	8	7/8	150	1	M24	22
4	100	290	44.5	159	114.3	114	157.2	7	235	12.7	8	1 1/8	180	1 1/4	M30	22
6	150	380	55.6	235	168.3	140	215.9	7	317.5	12.7	12	1 1/8	195	1 1/4	M30	70
8	200	470	63.5	298	219.1	162	269.9	7	393.7	12.7	12	1 3/8	230	1 1/2	M36	119
10	250	545	69.9	368	273	184	323.8	7	469.9	12.7	16	1 3/8	240	1 1/2	M36	204
12	300	610	79.4	419	323.8	200	381	7	533.4	12.7	20	1 3/8	260	1 1/2	M36	303
14	350	640	85.8	451	355.6	213	412.8	7	558.8	12.7	20	1 1/2	280	1 5/8	M39	400
16	400	705	88.9	508	406.4	216	469.9	7	616	12.7	20	1 5/8	290	1 3/4	M42	510
18	450	785	101.9	565	457.2	229	533.4	7	685.8	12.7	20	1 7/8	330	2	M48	738
20	500	855	108	622	508	248	584.2	7	749.3	12.7	20	2	355	2 1/8	M52	932
24	600	1040	139.7	749	609.6	292	692.2	7	901.7	12.7	20	2 1/2	445	2 5/8	M64	1511

Dimensions of Class 1500 Orifice Flange (Weld Neck Raised Face)

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	Welding Neck Length	RF Dia.	RF Height	PCD	Orifice Hole dia	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	F	G	H	I
1	25	150	38.1	52	33.5	83	50.8	7	101.6	6.4	4	7/8	150	1	M24	5.4
1 1/2	40	180	38.1	70	48.3	89	73	7	123.8	6.4	4	1	160	1 1/8	M27	7.8
2	50	215	38.1	105	60.3	102	92.1	7	165.1	6.4	8	7/8	150	1	M24	11.5
2 1/2	65	245	41.3	124	73	105	104.8	7	190.5	6.4	8	1	165	1 1/8	M27	15.8
3	80	265	47.7	133	88.9	117	127	7	203.2	9.5	8	1 1/8	185	1 1/4	M30	22
4	100	310	54	162	114.3	124	157.2	7	241.3	12.7	8	1 1/4	205	1 3/8	M33	22
6	150	395	82.6	229	168.3	171	215.9	7	317.5	12.7	12	1 3/8	265	1 1/2	M36	70
8	200	485	92.1	292	219.1	213	269.9	7	393.7	12.7	12	1 5/8	300	1 3/4	M42	119
10	250	585	108	368	273	254	323.8	7	482.6	12.7	12	1 7/8	345	1	M48	204
12	300	675	123.9	451	323.8	283	381	7	571.5	12.7	16	2	380	2 1/8	M52	303
14	350	750	133.4	495	355.6	298	412.8	7	635	12.7	16	2 1/4	415	2 3/8	M56	400
16	400	825	146.1	552	406.4	311	469.9	7	704.8	12.7	16	2 1/2	450	2 5/8	M64	510
18	450	915	162	597	457.2	327	533.4	7	774.7	12.7	16	2 3/4	500	2 7/8	M72	738
20	500	985	177.8	641	508	356	584.2	7	831.8	12.7	16	3	545	3 1/8	M76	932
24	600	1170	203.2	762	609.6	406	692.2	7	990.6	12.7	16	3 1/2	620	3 5/8	M90	1511

Dimensions of Class 2500 Orifice Flange (Weld Neck Raised Face)

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	Welding Neck Length	RF Dia.	RF Height	PCD	Orifice Hole dia	No of Bolts	Bolt Size UNC	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
		A	B	C	D	E	F	G	H	I
1	25	160	38.1	57	33.5	92	50.8	7	108	6.4	4	7/8	150	1	M24	6.5
1 1/2	40	205	44.5	79	48.3	111	73	7	146	6.4	4	1 1/8	180	1 1/4	M30	13
2	50	235	50.8	95	60.3	127	92.1	7	171.4	6.4	8	1	185	1 1/8	M27	19
2 1/2	65	265	57.2	114	73	143	104.8	7	196.8	6.4	8	1 1/8	205	1 1/4	M30	24
3	80	305	66.7	133	88.9	168	127	7	228.6	9.5	8	1 1/4	230	1 3/8	M33	43
4	100	355	76.2	165	114.3	190	157.2	7	273	12.7	8	1 1/2	260	1 5/8	M39	66
6	150	485	108	235	168.3	273	215.9	7	368.3	12.7	8	2	350	2 1/8	M52	172
8	200	550	127	305	219.1	318	269.9	7	438.2	12.7	12	2	385	2 1/8	M52	261
10	250	675	165.1	375	273	419	323.8	7	539.8	12.7	12	2 1/2	490	2 5/8	M64	485
12	300	760	184.2	441	323.8	464	381	7	619.1	12.7	12	2 3/4	540	2 7/8	M72	730

Disclaimer –  Please check with ASME B16.36 Before using.

Manufacturing process of orifice flanges

Orifice 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 orifice flanges, from the materials used to the final product.

Step 1: Material Selection
The first step in our manufacturing process is material selection. 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: 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 5: Solid solution
Make the structure and composition of the blank flange uniform, which is particularly important for raw materials. At high temperatures, atomic activity intensifies, σ Phase dissolution, the chemical composition tends to be uniform, and a uniform single-phase structure is obtained after rapid cooling.
Eliminate work hardening to facilitate continuous cold work. The distorted lattice is recovered through solution treatment, the elongated and broken grains are recrystallized, the internal stress is eliminated, the tensile strength of stainless-steel forgings decreases, and the elongation increases.
Restore the inherent corrosion resistance of the flange blank. Due to carbide precipitation and lattice defects caused by cold working, the corrosion resistance of the flange blank is reduced. The corrosion resistance of forgings recovered to the best state after solution treatment.
Step 6: Machining
Once the flange is formed, it undergoes machining to ensure that it is smooth and free from any imperfections. We use CNC machines to achieve the highest level of accuracy in our machining process.
Step 7: Inspection
Before the flange is considered complete, it undergoes a thorough inspection process to ensure that it meets industry standards. Our team of experts inspects each flange to ensure that it is free from any defects and meets the specifications of the customer.
Step 8: Coating
Once the inspection process is complete, the flange is coated to protect it from corrosion and other environmental factors. We offer a variety of coating options, including epoxy, zinc, and galvanized coatings.
Step 9: 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 Jihua, we take great pride in our manufacturing process of orifice 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 orifice flanges

The marking of orifice 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.
Orifice flanges are typically marked by industry standards, such as ASME B16.36 or API 6A. 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
• Orifice plate bore diameter
• 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 orifice plate itself.

Packing of orifice flanges

How to package orifice flanges? To pack the orifice flange, follow these steps:
When it comes to packaging orifice 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 orifice flanges.
Step 1: Clean and Inspect the Flanges
Before packaging the orifice 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 orifice 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 orifice 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 orifice 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 orifice flanges properly, and label the package accurately to avoid any mishaps during transportation.

Inspection and measurement of orifice flanges

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

Material
The first thing to inspect in a orifice 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 orifice 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 orifice 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.

Application of orifice flanges

Orifice flanges are widely used in various industries, including oil and gas, chemical, petrochemical, power generation, water treatment, and HVAC. Some common applications of orifice flanges are:

• Measuring the flow rate of fluids in pipelines;
• Controlling the flow rate of fluids in process systems;
• Monitoring the efficiency of pumps, compressors, and turbines;
• Balancing the flow of fluids in multi-line systems;
• Preventing pipe erosion and corrosion.

Installation of Orifice Flanges

Proper installation of orifice flanges is crucial for accurate flow measurement and safe operation. Some key points to consider during installation are:
Orifice flanges should be installed in a straight pipe section with enough upstream and downstream consecutive runs.
The orifice plate should be installed with the flat side facing upstream.
The orifice plate should be centered in the pipe bore, and the bore diameter should match the nominal diameter of the pipe.
The gaskets used in orifice flanges should be compatible with the process fluid and the flange material.
The bolts in orifice flanges should be tightened according to the manufacturer’s specifications.

Maintenance of Orifice Flanges

Regular maintenance of orifice flanges is essential to ensure accurate flow measurement and prevent leaks or failures. Some maintenance tasks for orifice flanges are:
I checked the condition of the orifice plate for wear, erosion, or corrosion.
Cleaning the orifice plate and the Burstiness and Perplexity in Orifice Flanges
Burstiness refers to sudden or unexpected changes in the flow rate of fluids. Orifice flanges are designed to measure and control burstiness in pipelines, especially in systems that handle variable flow rates or intermittent flows.
Perplexity refers to the complexity or diversity of the fluid properties that affect flow measurement. Orifice flanges are calibrated based on fluid density, viscosity, and temperature. Therefore, it is essential to choose the right material and orifice plate design to account for the perplexity of the process fluid.

How to purchase the correct orifice flanges?

Are you in the market for orifice 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 orifice flanges to ensure that you make the right decision.
Determine the Material Needed
The first step to purchasing the correct orifice 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 (RTJ), 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 Orifice Flange Size and Pressure Class
Once you have identified the material and orifice flange type, the next step is to determine the size and pressure class of the orifice flange. orifice 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.
Look for Quality and Certifications
It’s essential to ensure that the orifice 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 orifice 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 orifice 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 orifice flanges manufacturer?

Selecting the right manufacturer for orifice 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 orifice flanges manufacturer.
Quality of Products
The first factor to consider when selecting a orifice 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 orifice 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 orifice 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 Orifice Flange Supplier?

Jihua is a well-established and reputable manufacturer and supplier of orifice 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 orifice flange supplier:

• High-quality products: Jihua is committed to providing high-quality orifice 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 orifice flanges at an affordable price.
• Wide range of products: Jihua offers a wide range of orifice 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.

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

Export Country For Orifice 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