ASME B16.47 / ANSI B16.5 RF Flange Stockists
A Raised Face Flange is a type of flange where the sealing surface is raised above the flange’s bolting circle. This design ensures a better seal when the flange is bolted to a pipe, valve, or other components in a piping system. The raised face is typically machined to a specific height and is often used with a gasket to create a tight, leak-proof connection. Raised face flanges are commonly used in high-pressure and high-temperature systems where a reliable seal is crucial. These flanges are typically made from materials such as carbon steel, stainless steel, or alloy steel and are widely used in industries like petrochemical, oil and gas, power generation, and water treatment. The raised face helps distribute the pressure evenly and prevent leaks, making them an essential component for safe and efficient fluid or gas transportation systems.
At Ample Alloys, quality is paramount. The company uses advanced manufacturing techniques, high-grade materials, and state-of-the-art technology to produce durable and reliable products. Our team of experts oversees every stage of production, from design to delivery, ensuring consistency, precision, and the highest quality across all products. Additionally, We prides itself on maintaining a comprehensive inventory, allowing for quick turnarounds and on-time deliveries, even for large or complex orders. Whether it’s a standard product or a bespoke solution, We are dedicated to delivering excellence with every project.
RF flange, Raised face flange gasket, Raised face flange weld neck, Carbon steel raised face flange, Stainless steel raised face flange, Forged raised face flange, Raised face flange welding
Raised face flange ASME B16.5 Specifications
Size Range
15mm ( 1/2" NPS ) up to 600mm ( 24" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12
Flange Face Type
RF—Raised Face.
Stainless Steel
ASTM A182 F 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.
Standards / Dimension
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN
Carbon Steel
ASTM A105/A105N (SA105N), LTCS A350 LF2, A694
Alloy Steel
ASTM A182 / SA182 - F1 / F5 / F9 / F11 / F12 / F22 / F91
Pressure Class
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64.
Duplex & Super Duplex
ASTM A182 / ASME SA182 - S31803, S32205, 2205, S32750, S32760, S32950, 2507.
MTC
EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103
ANSI B16.5 Raised Face Flange, RF Flange - Dimensions & Weight
ANSI |
NOMINAL |
OUTSIDE | OUTSIDE | THICKNESS | DIAMETER | DIAMETER | NUMBER | DIAMETER |
|---|---|---|---|---|---|---|---|---|
| DIAMETER | DIAMETER OF | OF FLANGE | OF BOLT | OF BOLT | ||||
| CLASS | PIPE SIZE | OF BOLTS | OF BOLTS | |||||
| OF FLANGE | RAISED FACE | tf | CIRCLE | HOLES | ||||
| 3/4 | 3.88 | 1.69 | 0.44 | 2.75 | 0.62 | 4 | 0.50 | |
| 1 | 4.25 | 2.00 | 0.50 | 3.12 | 0.62 | 4 | 0.50 | |
| 1 1/2 | 5.00 | 2.88 | 0.62 | 3.88 | 0.62 | 4 | 0.50 | |
| 2 | 6.00 | 3.62 | 0.69 | 4.75 | 0.75 | 4 | 0.62 | |
| 3 | 7.50 | 5.00 | 0.88 | 6.00 | 0.75 | 4 | 0.62 | |
| 4 | 9.99 | 6.19 | 0.88 | 7.50 | 0.75 | 8 | 0.62 | |
| 150 | 6 | 11.00 | 8.50 | 0.94 | 9.50 | 0.88 | 8 | 0.75 |
| 8 | 13.50 | 10.62 | 1.06 | 11.75 | 0.88 | 8 | 0.75 | |
| 10 | 16.00 | 12.75 | 1.12 | 14.25 | 1.00 | 12 | 0.87 | |
| 12 | 19.00 | 15.00 | 1.19 | 17.00 | 1.00 | 12 | 0.87 | |
| 14 | 21.00 | 16.25 | 1.31 | 18.75 | 1.12 | 12 | 1.00 | |
| 16 | 23.50 | 18.50 | 1.38 | 21.25 | 1.12 | 16 | 1.00 | |
| 18 | 25.00 | 21.00 | 1.50 | 22.75 | 1.25 | 16 | 1.12 | |
| 20 | 27.50 | 23.99 | 1.62 | 25.00 | 1.25 | 20 | 1.12 | |
| 24 | 32.00 | 27.25 | 1.82 | 29.50 | 1.38 | 20 | 1.25 | |
| 3/4 | 4.62 | 1.69 | 0.56 | 3.25 | 0.75 | 4 | 0.62 | |
| 1 | 4.88 | 2.00 | 0.62 | 3.50 | 0.75 | 4 | 0.62 | |
| 1 1/2 | 6.12 | 2.88 | 0.75 | 4.25 | 0.88 | 4 | 0.75 | |
| 2 | 6.50 | 3.62 | 0.81 | 5.00 | 0.75 | 8 | 0.62 | |
| 3 | 8.25 | 5.00 | 1.06 | 6.62 | 0.88 | 8 | 0.75 | |
| 4 | 10.00 | 6.19 | 1.19 | 7.88 | 0.88 | 8 | 0.75 | |
| 300 | 6 | 12.50 | 8.50 | 1.38 | 10.62 | 0.88 | 12 | 0.75 |
| 8 | 15.00 | 10.62 | 1.56 | 13.00 | 1.00 | 12 | 0.87 | |
| 10 | 17.50 | 12.75 | 1.82 | 15.25 | 1.12 | 16 | 1.00 | |
| 12 | 20.50 | 15.00 | 1.94 | 17.75 | 1.25 | 16 | 1.12 | |
| 14 | 23.00 | 16.25 | 2.06 | 20.25 | 1.25 | 20 | 1.12 | |
| 16 | 25.50 | 18.50 | 2.19 | 22.50 | 1.38 | 20 | 1.25 | |
| 18 | 28.00 | 21.00 | 2.31 | 24.75 | 1.38 | 24 | 1.25 | |
| 20 | 30.50 | 23.00 | 2.44 | 27.00 | 1.38 | 24 | 1.25 | |
| 1 | 4.88 | 2.00 | 0.69 | 3.50 | 0.75 | 4 | 0.62 | |
| 1 1/2 | 6.12 | 2.88 | 0.88 | 4.50 | 0.88 | 4 | 0.75 | |
| 2 | 6.50 | 3.62 | 1.00 | 5.00 | 0.75 | 8 | 0.62 | |
| 3 | 8.25 | 5.00 | 1.25 | 6.62 | 0.88 | 8 | 0.75 | |
| 4 | 10.75 | 6.19 | 1.50 | 8.50 | 1.00 | 8 | 0.87 | |
| 600 | 6 | 14.00 | 8.50 | 1.88 | 11.50 | 1.12 | 12 | 1.00 |
| 8 | 16.50 | 10.62 | 2.19 | 13.75 | 1.25 | 12 | 1.12 | |
| 10 | 20.00 | 12.75 | 2.50 | 17.00 | 1.38 | 16 | 1.25 | |
| 12 | 22.00 | 15.00 | 2.62 | 19.25 | 1.38 | 20 | 1.25 | |
| 14 | 23.75 | 16.25 | 2.75 | 20.75 | 1.50 | 20 | 1.37 | |
| 16 | 27.00 | 18.50 | 3.00 | 23.75 | 1.62 | 20 | 1.50 | |
| 1 1/2 | 7.00 | 2.88 | 1.25 | 4.88 | 1.12 | 4 | 1.00 | |
| 2 | 8.50 | 3.62 | 1.50 | 6.50 | 1.00 | 8 | 0.87 | |
| 3 | 9.50 | 5.00 | 1.50 | 7.50 | 1.00 | 8 | 0.87 | |
| 900 | 4 | 11.50 | 6.19 | 1.75 | 9.25 | 1.25 | 8 | 1.12 |
| 6 | 15.00 | 8.50 | 2.19 | 12.50 | 1.25 | 12 | 1.12 | |
| 8 | 18.50 | 10.62 | 2.50 | 15.50 | 1.50 | 12 | 1.37 | |
| 10 | 21.50 | 12.75 | 2.75 | 18.50 | 1.50 | 16 | 1.37 | |
| 1 1/2 | 7.00 | 2.88 | 1.25 | 4.88 | 1.12 | 4 | 1.00 | |
| 2 | 8.50 | 3.62 | 1.50 | 6.50 | 1.00 | 8 | 0.87 | |
| 1500 | 3 | 10.50 | 5.00 | 1.88 | 8.00 | 1.25 | 8 | 1.12 |
| 4 | 12.25 | 6.19 | 2.12 | 9.50 | 1.38 | 8 | 1.25 | |
| 6 | 15.50 | 8.50 | 3.25 | 12.50 | 1.50 | 12 | 1.37 | |
| 8 | 19.00 | 10.62 | 3.62 | 15.50 | 1.75 | 12 | 1.62 |
ASME raised face flange Standards
specific standards for raised face flanges to ensure they meet dimensional, pressure, and material requirements in various industrial applications. The primary standards governing raised face flanges include:
- ASME/ANSI Standards (American):
- ASME B16.5 – Pipe Flanges and Flanged Fittings (NPS 1/2" to 24").
- ASME B16.47 – Large Diameter Steel Flanges (Series A & B, NPS 26" to 60").
- ASME B16.36 – Orifice Flanges.
- ASME B16.48 – Line Blanks (Spectacle, Spade, and Spacer Flanges).
- ANSI B16.1 – Cast Iron Flanges and Flanged Fittings.
- ANSI B16.42 – Ductile Iron Pipe Flanges and Flanged Fittings.
- ISO Standards (International)
- ISO 7005-1 – Steel Flanges for General Applications.
- ISO 7005-2 – Cast Iron Flanges.
- ISO 7005-3 – Copper Alloy Flanges.
- EN Standards (European)
- EN 1092-1 – Steel Flanges.
- EN 1092-2 – Cast Iron Flanges.
- EN 1092-3 – Copper Alloy Flanges.
- EN 1092-4 – Aluminium Alloy Flanges.
- DIN Standards (German)
- DIN 2527 – Blind Flanges.
- DIN 2576 – Slip-On Flanges (PN 10).
- DIN 2633 – Weld Neck Flanges (PN 16).
- DIN 2634 – Weld Neck Flanges (PN 25).
- DIN 2635 – Weld Neck Flanges (PN 40).
- JIS Standards (Japanese)
- JIS B2220 – Steel Pipe Flanges.
- GOST Standards (Russian)
- GOST 12820 – Flat Flanges for Steel Pipe Joints.
- GOST 12821 – Steel Welded Flanges for High-Pressure Applications.
- GOST 33259 – Flange Connections for Industrial Equipment and Pipelines.
- BS Standards (British)
- BS 4504 – Circular Flanges for Pipes, Valves, and Fittings.
- BS 10 – Specification for Flanges and Bolting.
- API Standards (Oil & Gas)
- API 6A – Wellhead and Christmas Tree Equipment Flanges.
- API 605 – Large-Diameter Carbon Steel Flanges (merged into ASME B16.47 Series B).
- AWWA Standards (Waterworks)
- AWWA C207 – Steel Ring Flanges for Waterworks Service.
- MSS Standards (Manufacturer's Standardization Society)
- MSS SP-44 – Steel Pipe Flanges (merged into ASME B16.47 Series A).
- MSS SP-51 – Flanges for Glass-Lined Equipment.
- Material-Specific Standards (ASTM)
- ASTM A105 – Carbon Steel Forged Flanges.
- ASTM A182 – Alloy and Stainless Steel Forged Flanges.
- ASTM A350 – Carbon and Low-Alloy Steel Flanges for Low-Temperature Service.
- ASTM A694 – High-Strength Carbon and Alloy Steel Flanges for High-Pressure Applications.
- Other Regional and Specialized Standards
- KS B1511 – Korean Standard Flanges.
- NF E29-206 – French Standard Flanges.
- SANS 1123 – South African Standard for Steel Flanges.
Why Ample Alloys For ANSI Raised Face Flange!
Ample Alloys offers high-quality ANSI raised face flanges made from superior materials, ensuring durability and reliability in high-pressure systems. Our custom solutions, precision manufacturing, and adherence to industry standards make us the ideal choice for all your flange needs.
Compliance with Industry Standards
Our ANSI raised face flanges adhere to the latest ASME B16.5 and ASME B16.47 standards, ensuring that they meet stringent quality and safety requirements for various industrial applications.
Custom Solutions
We offer customized ANSI raised face flanges in different sizes, pressure ratings, and materials to suit the specific needs of your projects, ensuring a perfect fit and reliable performance.
Precision Manufacturing
With advanced manufacturing processes and precision machining, our ANSI raised face flanges are designed to provide a leak-proof seal and ensure safe, efficient fluid and gas flow.
Experienced Team
With years of expertise, Ample Alloys' team provides expert advice, support, and customer service, ensuring that you select the best ANSI raised face flanges for your applications.
Raised face flanges provide a better sealing surface, reducing the risk of leaks under pressure. They are ideal for high-pressure systems, ensuring a secure and reliable connection.
Yes, raised face flanges can be customized in terms of size, material, pressure rating, and gasket dimensions to meet specific project requirements.
A raised face flange has a raised portion around the sealing surface, which helps create a better seal compared to a flat face flange that has no raised portion. Raised face flanges are typically used in higher pressure systems.
