Understanding your choice of raised face flanges options
When it comes to piping systems, raised face flanges play an essential role in connecting different sections of the pipeline. A raised face flange is a type of flange with a small raised lip or ring, which provides additional support and stability to the connection. We will explore the various options available for raised face flanges and help you understand which one is the best fit for your specific application.
What are raised face flanges?
Raised face flanges are a type of flange that is commonly used in piping systems. These flanges feature a raised surface, or face, that is designed to mate with a corresponding surface on another flange, creating a seal between the two parts. The raised face design of these flanges helps to distribute the load evenly across the sealing surface, which can help to reduce the risk of leaks and other issues.
Types of Raised Face Flanges
We will discuss in detail the various types of raised face flanges, including Raised Face Welding Neck Flange, Raised Face Socket Weld Flange, Raised Face Slip-on Flange, Raised Face Blind Flange, Raised Face Threaded Flange, Raised Face Lap Joint Flange, Raised Face Orifice Flange, Raised Face Spectacle Blind Flange, Raised Face Long Weld Neck Flange, and Raised Face Plate Flange.
Raised Face Welding Neck Flange
A Raised Face Welding Neck Flange, also known as an RFWN flange, connects pipes, valves, and other equipment to form a piping system. This flange type has a long tapered hub that gradually merges into the wall thickness from a pipe or fitting. It is also used in high-pressure applications where the connection needs to be secure and leak-free. RFWN flanges are commonly used in oil and gas, petrochemicals, and power generation industries.
Raised Face Socket Weld Flange
A Raised Face Socket Weld Flange, also known as an RFSW flange, is similar to the RFWN flange, except it has a socket for welding instead of a hub. This type of flange is used for smaller pipes and in lower-pressure applications. RFSW flanges are commonly used in chemical processing, pharmaceuticals, and food and beverage industries.
Raised Face Slip-on Flange
A Raised Face Slip-on Flange, also known as an RF SO flange, slides over the end of a pipe and welds in place. This flange type is commonly used in low-pressure applications without critical alignment. RF SO flanges are widely used in plumbing, irrigation, and water treatment industries.
Raised Face Blind Flange
A Raised Face Blind Flange, also known as an RF BL flange, is used to close off the end of a piping system. This type of flange does not have a center hole and is bolted to the flange at the end of the pipe. RF BL flanges are commonly used in shipbuilding, offshore drilling, and water treatment industries.
Raised Face Threaded Flange
A Raised Face Threaded Flange, also known as an RF TH flange, connects pipes with threads. This flange type is commonly used in low-pressure applications where disassembly is required. RF TH flanges are widely used in plumbing, irrigation, and fire protection industries.
Raised Face Lap Joint Flange
A Raised Face Lap Joint Flange, also known as an RF LJ flange, is combined with a Lap Joint Stub End. This type of flange allows for easy alignment and assembly of piping systems. RF LJ flanges are commonly used in power generation, chemical processing, and pharmaceuticals.
Raised Face Orifice Flange
A Raised Face Orifice Flanges is used in flow metering applications. This flange type has a concentric or eccentric bore threaded or welded to a pipe or fitting. RF ORF flanges are commonly used in oil and gas, petrochemicals, and water treatment industries.
Raised Face Spectacle Blind Flange
A Raised Face Spectacle Blind Flange, also known as an RF SB flange, is used to isolate sections of a piping system for My apologies; here is the continuation of the article:
Raised Face Lap Joint Flange
The Raised Face Lap Joint Flange, also known as the Loose Flange, is often used in applications requiring frequent dismantling. It consists of a stub end, which is welded to the pipe, and a backing flange, free to rotate around the stub end. The Raised Face Lap Joint Flange is similar to the Slip-on Flange, except it has a curved radius at the bore and face to accommodate the stub end. This flange type is used primarily in low-pressure systems and non-critical applications.
Raised Face Orifice Flange
The Raised Face Orifice Flange is designed to measure the flow rate with orifice meters. The orifice plate is mounted between the flanges, with bolts passing through the plate and the flange. The Raised Face Orifice Flange is available in a wide range of materials and can be supplied with either a concentric or eccentric bore. The eccentric bore is typically used in applications where the flow needs to be directed away from the pipe wall.
Raised Face Spectacle Blind Flange
The Raised Face Spectacle Blind Flange, also known as a Figure-8 Blind Flange, isolates pipeline sections for maintenance or inspection. The Spectacle Blind consists of two metal discs joined together with a handle or stud bolt. The discs are rotated to align the holes with the pipeline, allowing flow through the flange, or rotated 90 degrees to block the flow. The Raised Face Spectacle Blind Flange is typically used in applications where the flow needs to be shut off completely, such as in oil and gas pipelines.
Raised Face Long Weld Neck Flange
The Raised Face Long Weld Neck Flange, also known as the Weld Neck Flange, is designed for high-pressure applications. It has a long, tapered neck, which reduces the stress on the flange and the weld. The weld neck flange is typically butt-welded to the pipe, providing a smooth transition from the line to the flange. The Raised Face Long Weld Neck Flange is available in various materials and is suitable for multiple applications.
Raised Face Plate Flange
The Raised Face Plate Flange, also known as the Flat Face Flange, is the most common type of flange used in low-pressure applications. It is a flat circular disc bolted to the pipe or equipment. The Raised Face Plate Flange has a raised face around the bore, providing a surface for the gasket to sit against. The flange is available in various materials and is suitable for multiple applications.
The difference between raised face flange and male flange?
In the flange connection, the male flange needs to cooperate with the female flange, commonly known as “a male and a female”, while the raised face flange should cooperate with the raised face flange. Generally speaking, the raised face flange should also belong to a kind of flat flange, the code is RF, while the male flange code is M .
RF face can only be linked with RF face, M face flange need to be connected with FM face, M/FM face is better than RF face pressure.
Often the actual procurement process, many people think that the two are the same, it causes the loss of ordering. The following pictures can be more visual to let you see the difference between the two:
Advantages of Raised Face Flanges
Raised face flanges offer several advantages over other types of flanges.
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1. They provide a secure and leak-proof connection between two flanges. The raised face creates a tight seal between the flanges, preventing fluid or gas from escaping the system.
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2. Raised face flanges are easy to install and maintain. The raised face allows for easy bolting alignment, making it easier to install the flange. The raised face can be easily cleaned or inspected without disassembling the entire system.
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3. Raised face flanges are versatile and can be used in various applications. They are suitable for high-pressure and high-temperature applications, making them popular in the oil, gas, chemical, and petrochemical industries.
Materials of Raised Face Flanges
Depending on the specific application requirements, raised face flanges are made from a variety of metal materials, including:
| Titanium Raised Face 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 Raised Face 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 Raised Face Flange | ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640 |
| Carbon Steel Raised Face 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 Raised Face 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 Raised Face Flange | ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91 |
| Hastelloy Raised Face Flange | ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X |
| Brass Raised Face Flange | 3602 / 2604 / H59 / H62 / etc. |
| Inconel Raised Face Flange | ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 |
| Monel Raised Face Flange | ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500) |
| Duplex Raised Face Flange | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Super Duplex Raised Face Flange | S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Alloy 20 Raised Face Flange | ASTM B462 / ASME SB462, Carpenter 20 Alloy, Alloy 20Cb-3 |
| Aluminium Raised Face Flange | 5052 /6061/ 6063 / 2017 / 7075 / etc. |
| Nickel Raised Face Flange | ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC |
| Nimonic Raised Face Flange | Nimonic 75, Nimonic 80A, Nimonic 90 |
| Other Raised Face Flange material | Tin bronze, Alumunum bronze, Lead bronze |
| Incoloy Raised Face Flange | ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 |
| 254 Smo Raised Face Flange | ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547 |
Dimensions of Raised Face Flanges
The dimensions of raised face flanges are standardized by industry standards, including ASME B16.5 and ASME B16.47. The dimensions are based on the nominal pipe size (NPS) and pressure class of the flange.
The dimensions of raised face flanges include the outside diameter (OD), bolt circle diameter (BC), thickness (T), raised face diameter (RF), and raised face height (R). The RF dimension is the diameter of the raised face surface, and the R dimension is the height of the raised face surface.
For example, the dimensions of a 2-inch raised face flange with a 150-pressure class would be as follows:
- OD: 6.00 inches
- BC: 4.75 inches
- T: 0.56 inches
- RF: 3.50 inches
- R: 0.63 inches
It is important to note that the dimensions of raised face flanges may vary depending on the pressure class and material of the flange.
Dimensions of ANSI B16.5 Raised Face Flanges
| ANSI | NOMINAL PIPE SIZE | OUTSIDE DIAMETER OF FLANGE | OUTSIDE DIAMETER OF RAISED FACE | THICKNESS OF FLANGE tf | DIAMETER OF BOLT CIRCLE | DIAMETER OF BOLT HOLES | NUMBER OF BOLTS | DIAMETER OF BOLTS |
| CLASS | ||||||||
| 150 | 3/4 | 3.88 | 1.69 | 0.44 | 2.75 | 0.62 | 4 | 0.5 |
| 1 | 4.25 | 2 | 0.5 | 3.12 | 0.62 | 4 | 0.5 | |
| 1 1/2 | 5 | 2.88 | 0.62 | 3.88 | 0.62 | 4 | 0.5 | |
| 2 | 6 | 3.62 | 0.69 | 4.75 | 0.75 | 4 | 0.62 | |
| 3 | 7.5 | 5 | 0.88 | 6 | 0.75 | 4 | 0.62 | |
| 4 | 9.99 | 6.19 | 0.88 | 7.5 | 0.75 | 8 | 0.62 | |
| 6 | 11 | 8.5 | 0.94 | 9.5 | 0.88 | 8 | 0.75 | |
| 8 | 13.5 | 10.62 | 1.06 | 11.75 | 0.88 | 8 | 0.75 | |
| 10 | 16 | 12.75 | 1.12 | 14.25 | 1 | 12 | 0.87 | |
| 12 | 19 | 15 | 1.19 | 17 | 1 | 12 | 0.87 | |
| 14 | 21 | 16.25 | 1.31 | 18.75 | 1.12 | 12 | 1 | |
| 16 | 23.5 | 18.5 | 1.38 | 21.25 | 1.12 | 16 | 1 | |
| 18 | 25 | 21 | 1.5 | 22.75 | 1.25 | 16 | 1.12 | |
| 20 | 27.5 | 23.99 | 1.62 | 25 | 1.25 | 20 | 1.12 | |
| 24 | 32 | 27.25 | 1.82 | 29.5 | 1.38 | 20 | 1.25 | |
| 300 | 3/4 | 4.62 | 1.69 | 0.56 | 3.25 | 0.75 | 4 | 0.62 |
| 1 | 4.88 | 2 | 0.62 | 3.5 | 0.75 | 4 | 0.62 | |
| 1 1/2 | 6.12 | 2.88 | 0.75 | 4.25 | 0.88 | 4 | 0.75 | |
| 2 | 6.5 | 3.62 | 0.81 | 5 | 0.75 | 8 | 0.62 | |
| 3 | 8.25 | 5 | 1.06 | 6.62 | 0.88 | 8 | 0.75 | |
| 4 | 10 | 6.19 | 1.19 | 7.88 | 0.88 | 8 | 0.75 | |
| 6 | 12.5 | 8.5 | 1.38 | 10.62 | 0.88 | 12 | 0.75 | |
| 8 | 15 | 10.62 | 1.56 | 13 | 1 | 12 | 0.87 | |
| 10 | 17.5 | 12.75 | 1.82 | 15.25 | 1.12 | 16 | 1 | |
| 12 | 20.5 | 15 | 1.94 | 17.75 | 1.25 | 16 | 1.12 | |
| 14 | 23 | 16.25 | 2.06 | 20.25 | 1.25 | 20 | 1.12 | |
| 16 | 25.5 | 18.5 | 2.19 | 22.5 | 1.38 | 20 | 1.25 | |
| 18 | 28 | 21 | 2.31 | 24.75 | 1.38 | 24 | 1.25 | |
| 20 | 30.5 | 23 | 2.44 | 27 | 1.38 | 24 | 1.25 | |
| 600 | 1 | 4.88 | 2 | 0.69 | 3.5 | 0.75 | 4 | 0.62 |
| 1 1/2 | 6.12 | 2.88 | 0.88 | 4.5 | 0.88 | 4 | 0.75 | |
| 2 | 6.5 | 3.62 | 1 | 5 | 0.75 | 8 | 0.62 | |
| 3 | 8.25 | 5 | 1.25 | 6.62 | 0.88 | 8 | 0.75 | |
| 4 | 10.75 | 6.19 | 1.5 | 8.5 | 1 | 8 | 0.87 | |
| 6 | 14 | 8.5 | 1.88 | 11.5 | 1.12 | 12 | 1 | |
| 8 | 16.5 | 10.62 | 2.19 | 13.75 | 1.25 | 12 | 1.12 | |
| 10 | 20 | 12.75 | 2.5 | 17 | 1.38 | 16 | 1.25 | |
| 12 | 22 | 15 | 2.62 | 19.25 | 1.38 | 20 | 1.25 | |
| 14 | 23.75 | 16.25 | 2.75 | 20.75 | 1.5 | 20 | 1.37 | |
| 16 | 27 | 18.5 | 3 | 23.75 | 1.62 | 20 | 1.5 | |
| 900 | 1 1/2 | 7 | 2.88 | 1.25 | 4.88 | 1.12 | 4 | 1 |
| 2 | 8.5 | 3.62 | 1.5 | 6.5 | 1 | 8 | 0.87 | |
| 3 | 9.5 | 5 | 1.5 | 7.5 | 1 | 8 | 0.87 | |
| 4 | 11.5 | 6.19 | 1.75 | 9.25 | 1.25 | 8 | 1.12 | |
| 6 | 15 | 8.5 | 2.19 | 12.5 | 1.25 | 12 | 1.12 | |
| 8 | 18.5 | 10.62 | 2.5 | 15.5 | 1.5 | 12 | 1.37 | |
| 10 | 21.5 | 12.75 | 2.75 | 18.5 | 1.5 | 16 | 1.37 | |
| 1500 | 1 1/2 | 7 | 2.88 | 1.25 | 4.88 | 1.12 | 4 | 1 |
| 2 | 8.5 | 3.62 | 1.5 | 6.5 | 1 | 8 | 0.87 | |
| 3 | 10.5 | 5 | 1.88 | 8 | 1.25 | 8 | 1.12 | |
| 4 | 12.25 | 6.19 | 2.12 | 9.5 | 1.38 | 8 | 1.25 | |
| 6 | 15.5 | 8.5 | 3.25 | 12.5 | 1.5 | 12 | 1.37 | |
| 8 | 19 | 10.62 | 3.62 | 15.5 | 1.75 | 12 | 1.62 |
Notes:
- 1. Class 150 and 300 flanges have a 0.06” raised face which is not included in the “tf” dimension.
- 2. Class 600 to 1500 have a 0.25” raised face which is not included in the “tf” dimension.
- 3. DFT’s standard flange finish is 125 – 250 Ra.
- 4. All dimensions are in inches.
ASME B16.5 Raised Face Flanges Pressure Ratings
| Flanges pressure rating in psig for Raised Face Flange ASME | |||||||
| Temperature (°F) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
| -20 to 100 | 285 | 740 | 985 | 1480 | 2220 | 3705 | 6170 |
| 200 | 260 | 680 | 905 | 1360 | 2035 | 3395 | 5655 |
| 300 | 230 | 655 | 870 | 1310 | 1965 | 3270 | 5450 |
| 400 | 200 | 635 | 845 | 1265 | 1900 | 3170 | 5280 |
| 500 | 170 | 605 | 805 | 1205 | 1810 | 3015 | 5025 |
| 600 | 140 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
| 650 | 125 | 550 | 730 | 1100 | 1650 | 2745 | 4575 |
| 700 | 110 | 530 | 710 | 1060 | 1590 | 2655 | 4425 |
| 750 | 95 | 505 | 675 | 1015 | 1520 | 2535 | 4230 |
| 800 | 80 | 410 | 550 | 825 | 1235 | 2055 | 3430 |
| 850 | 65 | 320 | 425 | 640 | 955 | 1595 | 2655 |
| 900 | 50 | 230 | 305 | 460 | 690 | 1150 | 1915 |
| 950 | 35 | 135 | 185 | 275 | 410 | 685 | 1145 |
| 1000 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
Manufacturing process of Raised Face Flanges
Raised Face 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 raised face 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 raised face 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 Raised Face Flanges
The marking of raised face flanges must contain the following information:
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Flange Size: the flange size refers to the nominal diameter of the pipe to which the flange is attached. It is usually expressed in inches or millimeters.
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Pressure Rating: the pressure rating is the maximum pressure that the flange can handle. It is usually expressed in pounds per square inch (psi) or bar.
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Material Specification: the material specification indicates the material used to manufacture the flange. It is usually expressed using ASTM (American Society for Testing and Materials) or ASME (American Society of Mechanical Engineers) standards.
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Tag Number: the tag number is a unique identifier assigned to the flange. It is used for tracking purposes and can be used to retrieve information about the flange.
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Manufacturer’s Name or Trademark: the manufacturer’s name or trademark identifies the company that manufactured the flange.
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Heat Number or Lot Number: the heat number or lot number identifies the batch of material used to manufacture the flange. It is used for quality control purposes and can be used to trace the flange’s origin.
Packing of Raised Face Flanges
How to package raised face flanges? To pack the raised face flange, follow these steps:
When it comes to packaging raised face 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 raised face flanges.
Step 1: Clean and Inspect the Flanges
Before packaging the raised face 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 raised face 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 raised face 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 raised face 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 raised face flanges properly, and label the package accurately to avoid any mishaps during transportation.
Inspection and measurement of Raised Face Flanges
There are several factors that need to be considered when inspecting and measuring raised face flanges, including:
Material
The first thing to inspect in a raised face 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 raised face 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 raised face 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 Raised Face Flanges
Raised Face Flanges are widely used in various industries, including oil and gas, chemical, petrochemical, power generation, water treatment, and HVAC. Some common applications of raised face flanges are:
- Pumps, Valves, and vessels in manufacturing and food processing.
- Pipe connections in industrial waterworks.
- Heat exchangers and heating systems of all sizes.
- Mining support.
- Nuclear power systems.
- Plumbing and mechanical systems.
- Assemblies in the oil, gas, and petrochemical industries.
- Fire protection systems.
How to purchase the correct raised face flanges?
Are you in the market for raised face 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 raised face flanges to ensure that you make the right decision.
Determine the Material Needed
The first step to purchasing the correct raised face 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 Raised Face Flange Size and Pressure Class
Once you have identified the material and raised face flange type, the next step is to determine the size and pressure class of the raised face flange. raised face 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 raised face 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 raised face 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 raised face 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 raised face flanges manufacturer?
Selecting the right manufacturer for raised face 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 raised face flanges manufacturer.
Quality of Products
The first factor to consider when selecting a raised face 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 raised face 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 raised face 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 Raised Face Flange Supplier?
Jihua is a well-established and reputable manufacturer and supplier of raised face 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 raised face flange supplier:
- High-quality products: Jihua is committed to providing high-quality raised face 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 raised face flanges at an affordable price.
- Wide range of products: Jihua offers a wide range of raised face 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 raised face flanges that can meet your needs and exceed your expectations.
Export Country For Raised Face 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 | ||||
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| Malta |