Stainless Steel 317 Flanges are molybdenum-enriched austenitic flanges that are designed to operate in corrosive environments that SS 316 cannot endure. This advantageous percentage of molybdenum (3-4) in UNS S31700 gives these flanges a clear advantage over 316 in sulfuric acid, phosphoric acid, and heavy chloride service - and makes them the specification of choice in FGD (Flue Gas Desulfurization) systems, chemical processing plants, pulp and paper mills and pharmaceutical equipment. The low-carbon SS 317L (UNS S31703, DIN 1.4438) grade completely eliminates sensitization at weld areas so that post-weld heat treatment is not required in manufactured assemblies. They follow the requirements of ASTM A182 F317 / F317L and ASME B16.5, and are offered in 150# to 2500# pressure classes with sizes between 1/2 and 48 across. Amardeep Steel exports EN 10204 3.1 Mill Test Certificates SS 317 flanges with ready stock to export to UAE, Saudi Arabia, USA, UK, and Singapore etc.
Specification of Stainless Steel 317 Flanges
| Category | Specification Details |
|---|---|
| Manufacturing Standards | ANSI/ASME B16.5, B16.47 (Series A & B), B16.48, EN-1092, BS 10, BS4504, DIN, GOST, JIS |
| Size Range | 1/2″ (15 NB) to 48″ (1200 NB); DN10 to DN5000 |
| Pressure Ratings (Class) | 150#, 300#, 600#, 900#, 1500#, 2500# LBS |
| Pressure Ratings (PN/JIS) | PN6, PN10, PN16, PN25, PN40; JIS 5K, 10K, 16K, 20K, 30K, 40K, 63K |
| Face Types | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), Lap-Joint (LJF), Male-Female (SMF/LMF), Tongue & Groove |
| Production Technique | Forged, Heat treated, and Machined |
| Configurations | Equal and Reducing |
| Material Origins | India, Japan, Korea, West Europe, USA |
| Testing & Quality | EN 10204/3.1B, Raw Materials Certificate, 100% Radiography, Third Party Inspection |
| Key Applications | Gas, Power, Chemical, Metallurgy, Petroleum, Shipbuilding, Construction |
Chemical Properties of SS 317 Flanges
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
|---|---|---|---|---|---|---|---|---|---|
| SS 317 | 0.08 max | 2.0 max | 1.00 max | 0.045 max | 0.030 max | 18.00 – 20.0 | 3.00 – 4.00 | 11.00 – 15.0 | 57.845 min |
ASTM A182 SS 317 Flanges Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|
| 7.9 g/cm³ | 1400 °C (2550 °F) | 75,000 Psi (515 MPa) | 30,000 Psi (205 MPa) | 35% |
Equivalent Grades of Stainless Steel 317 Flanges
| Grade | Werkstoff Nr. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| SS 317 | 1.4449 | S31700 | SUS 317 | — | — | — | — |
Different Types of Stainless Steel 317 Flanges
SS 317 Tongue & Groove Flanges
UNS S31700 WNRF Flanges
ASME SA182 SS 317 Expander Flanges
ASTM A182 SS 317 SWRF Flanges
SS 317 Square Flanges
UNS S31700 SORF Flanges
ASME SA182 SS 317 RTJ Flanges
ASTM A182 SS 317 Loose Flanges
SS 317 Standard Insert Flanges
UNS S31700 Jacket Insert Flanges
ASME SA182 SS 317 Insert Flanges
ASTM A182 SS 317 Flat Flanges
SS 317 Reducing Flanges
UNS S31700 Blind Flanges
ASME SA182 SS 317 Forged Flanges
ASTM A182 SS 317 Plate Flanges
SS 317 Orifice Flanges
UNS S31700 Weldo Nipo Flanges
ASME SA182 SS 317 Long Weld Neck Flanges
ASTM A182 SS 317 Socket Weld Flanges
SS 317 Threaded Flanges
UNS S31700 Lap Joint Flanges
ASME SA182 SS 317 Weld Neck Flanges
ASTM A182 SS 317 Slip On Flanges
ASME B16.5 Class 150 Flange Dimensions Chart
| Nom. Pipe Size | O (OD) | T (Thk) | R (RF) | X (Hub) | Holes / Dia | Bolt Circle | L2 (Hub L) | B2 (Bore) |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 3.50 | 0.44 | 1.38 | 1.19 | 4 - 0.62 | 2.38 | 0.62 | 0.88 |
| 3/4″ | 3.88 | 0.50 | 1.69 | 1.54 | 4 - 0.62 | 2.75 | 0.62 | 1.09 |
| 1″ | 4.25 | 0.56 | 2.00 | 1.94 | 4 - 0.62 | 3.12 | 0.69 | 1.36 |
| 1-1/4″ | 4.62 | 0.62 | 2.50 | 2.31 | 4 - 0.62 | 3.50 | 0.81 | 1.72 |
| 1-1/2″ | 5.00 | 0.68 | 2.88 | 2.56 | 4 - 0.62 | 3.88 | 0.88 | 1.97 |
| 2″ | 6.00 | 0.75 | 3.62 | 3.06 | 4 - 0.75 | 4.75 | 1.00 | 2.46 |
| 2-1/2″ | 7.00 | 0.88 | 4.12 | 3.56 | 4 - 0.75 | 5.50 | 1.12 | 2.97 |
| 3″ | 7.50 | 0.94 | 5.00 | 4.25 | 4 - 0.75 | 6.00 | 1.19 | 3.60 |
| 3-1/2″ | 8.50 | 0.94 | 5.50 | 4.81 | 8 - 0.75 | 7.00 | 1.25 | 4.10 |
| 4″ | 9.00 | 0.94 | 6.19 | 5.31 | 8 - 0.75 | 7.50 | 1.31 | 4.60 |
| 5″ | 10.00 | 0.94 | 7.31 | 6.44 | 8 - 0.88 | 8.50 | 1.44 | 5.69 |
| 6″ | 11.00 | 1.00 | 8.50 | 7.56 | 8 - 0.88 | 9.50 | 1.56 | 6.75 |
| 8″ | 13.50 | 1.12 | 10.62 | 9.69 | 8 - 0.88 | 11.75 | 1.75 | 8.75 |
| 10″ | 16.00 | 1.19 | 12.75 | 12.00 | 12 - 1.00 | 14.25 | 1.94 | 10.92 |
| 12″ | 19.00 | 1.25 | 15.00 | 14.38 | 12 - 1.00 | 17.00 | 2.19 | 12.92 |
| 14″ | 21.00 | 1.38 | 16.25 | 15.75 | 12 - 1.12 | 18.75 | 2.25 | 14.18 |
| 16″ | 23.50 | 1.44 | 18.50 | 18.00 | 16 - 1.12 | 21.25 | 2.50 | 16.19 |
| 18″ | 25.00 | 1.56 | 21.00 | 19.88 | 16 - 1.25 | 22.75 | 2.69 | 18.20 |
| 20″ | 27.50 | 1.69 | 23.00 | 22.00 | 20 - 1.25 | 25.00 | 2.88 | 20.25 |
| 22″ | 29.50 | 1.81 | 25.25 | 24.25 | 20 - 1.38 | 27.25 | 3.13 | 22.25 |
| 24″ | 32.00 | 1.88 | 27.25 | 26.12 | 20 - 1.38 | 29.56 | 3.25 | 24.25 |
Weight Chart of Stainless Steel 317 Flanges
| Nom. Size | Dim | Class 125 | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | A | 3 1/2″ | 3 1/2″ | 3 3/4″ | 3 3/4″ | 3 3/4″ | 4 3/4″ | 4 3/4″ | 5 1/4″ |
| b | 7/16″ | 7/16″ | 9/16″ | 9/16″ | 9/16″ | 7/8″ | 7/8″ | 1 3/16″ | |
| D2 | 1 3/8″ | 1 3/8″ | 1 3/8″ | 1 3/8″ | 1 3/8″ | 1 3/8″ | 1 3/8″ | 1 3/8″ | |
| D1 | 2 3/8″ | 2 3/8″ | 2 5/8″ | 2 5/8″ | 2 5/8″ | 3 1/4″ | 3 1/4″ | 3 1/2″ | |
| n-d | 4-5/8″ | 4-5/8″ | 4-5/8″ | 4-5/8″ | 4-5/8″ | 4-7/8″ | 4-7/8″ | 4-7/8″ | |
| 3/4″ | A | 3 7/8″ | 3 7/8″ | 4 5/8″ | 4 5/8″ | 4 5/8″ | 5 1/8″ | 5 1/8″ | 5 1/2″ |
| b | 1/2″ | 1/2″ | 5/8″ | 5/8″ | 5/8″ | 1″ | 1″ | 1 1/4″ | |
| D2 | 1 11/16″ | 1 11/16″ | 1 11/16″ | 1 11/16″ | 1 11/16″ | 1 11/16″ | 1 11/16″ | 1 11/16″ | |
| D1 | 2 3/4″ | 2 3/4″ | 3 1/4″ | 3 1/4″ | 3 1/4″ | 3 1/2″ | 3 1/2″ | 3 3/4″ | |
| n-d | 4-5/8″ | 4-5/8″ | 4-3/4″ | 4-3/4″ | 4-3/4″ | 4-7/8″ | 4-7/8″ | 4-7/8″ | |
| 1″ | A | 4 1/4″ | 4 1/4″ | 4 7/8″ | 4 7/8″ | 4 7/8″ | 5 7/8″ | 5 7/8″ | 6 1/4″ |
| b | 9/16″ | 9/16″ | 11/16″ | 11/16″ | 11/16″ | 1 1/8″ | 1 1/8″ | 1 3/8″ | |
| D2 | 2″ | 2″ | 2″ | 2″ | 2″ | 2″ | 2″ | 2″ | |
| D1 | 3 1/8″ | 3 1/8″ | 3 1/2″ | 3 1/2″ | 3 1/2″ | 4″ | 4″ | 4 1/4″ | |
| n-d | 4-5/8″ | 4-5/8″ | 4-3/4″ | 4-3/4″ | 4-3/4″ | 4-1″ | 4-1″ | 4-1″ | |
| 1 1/4″ | A | 4 5/8″ | 4 5/8″ | 5 1/4″ | 5 1/4″ | 5 1/4″ | 6 1/4″ | 6 1/4″ | 7 1/4″ |
| b | 5/8″ | 5/8″ | 3/4″ | 13/16″ | 13/16″ | 1 1/8″ | 1 1/8″ | 1 1/2″ | |
| D2 | 2 1/2″ | 2 1/2″ | 2 1/2″ | 2 1/2″ | 2 1/2″ | 2 1/2″ | 2 1/2″ | 2 1/2″ | |
| D1 | 3 1/2″ | 3 1/2″ | 3 7/8″ | 3 7/8″ | 3 7/8″ | 4 3/8″ | 4 3/8″ | 5 1/8″ | |
| n-d | 4-5/8″ | 4-5/8″ | 4-3/4″ | 4-3/4″ | 4-3/4″ | 4-1″ | 4-1″ | 4-1 1/8″ | |
| 1 1/2″ | A | 5″ | 5″ | 6 1/8″ | 6 1/8″ | 6 1/8″ | 7″ | 7″ | 8″ |
| b | 11/16″ | 11/16″ | 13/16″ | 7/8″ | 7/8″ | 1 1/4″ | 1 1/4″ | 1 3/4″ | |
| D2 | 2 7/8″ | 2 7/8″ | 2 7/8″ | 2 7/8″ | 2 7/8″ | 2 7/8″ | 2 7/8″ | 2 7/8″ | |
| D1 | 3 7/8″ | 3 7/8″ | 4 1/2″ | 4 1/2″ | 4 1/2″ | 4 7/8″ | 4 7/8″ | 5 3/4″ | |
| n-d | 4-5/8″ | 4-5/8″ | 4-7/8″ | 4-7/8″ | 4-7/8″ | 4-1 1/8″ | 4-1 1/8″ | 4-1 1/4″ | |
| 2″ | A | 6″ | 6″ | 6 1/2″ | 6 1/2″ | 6 1/2″ | 8 1/2″ | 8 1/2″ | 9 1/4″ |
| b | 3/4″ | 3/4″ | 7/8″ | 1″ | 1″ | 1 1/2″ | 1 1/2″ | 2″ | |
| D2 | 3 5/8″ | 3 5/8″ | 3 5/8″ | 3 5/8″ | 3 5/8″ | 3 5/8″ | 3 5/8″ | 3 5/8″ | |
| D1 | 4 3/4″ | 4 3/4″ | 5″ | 5″ | 5″ | 6 1/2″ | 6 1/2″ | 6 3/4″ | |
| n-d | 4-3/4″ | 4-3/4″ | 8-3/4″ | 8-3/4″ | 8-3/4″ | 8-1″ | 8-1″ | 8-1 1/8″ | |
| 2 1/2″ | A | 7″ | 7″ | 7 1/2″ | 7 1/2″ | 7 1/2″ | 9 5/8″ | 9 5/8″ | 10 1/2″ |
| b | 7/8″ | 7/8″ | 1″ | 1 1/8″ | 1 1/8″ | 1 5/8″ | 1 5/8″ | 2 1/4″ | |
| D2 | 4 1/8″ | 4 1/8″ | 4 1/8″ | 4 1/8″ | 4 1/8″ | 4 1/8″ | 4 1/8″ | 4 1/8″ | |
| D1 | 5 1/2″ | 5 1/2″ | 5 7/8″ | 5 7/8″ | 5 7/8″ | 7 1/2″ | 7 1/2″ | 7 3/4″ | |
| n-d | 4-3/4″ | 4-3/4″ | 8-7/8″ | 8-7/8″ | 8-7/8″ | 8-1 1/8″ | 8-1 1/8″ | 8-1 1/4″ |
Application Usage of Stainless Steel 317 Flanges
- Flue Gas Desulfurization (FGD) Systems
- Chemical & Petrochemical Processing Plants
- Pulp & Paper Mills
- Pharmaceutical & Food Processing Equipment
- Marine & Offshore Environments
- Power Generation & Metallurgy
- Sulfuric Acid & Phosphoric Acid Service
- Seawater Handling & Desalination Plants
Price List of Stainless Steel 317 Flanges
| Flange Type | Price Range (USD) |
|---|---|
| SS 317 Slip On Flanges (SORF) | $2.05 – $10.06 / Piece |
| SS 317 Weld Neck Flanges (WNRF) | $2.05 – $10.06 / Piece |
| SS 317 Lap Joint Flanges | $2.05 – $10.06 / Piece |
| SS 317 Threaded Flanges (NPT) | $2.05 – $10.06 / Piece |
| UNS S31700 Socket Weld Flanges (SWRF) | $2.05 – $10.06 / Piece |
Note: The prices listed above are for reference purposes only and are subject to change without prior notice. For the most current, accurate, and competitive pricing, please get in touch with our sales department directly.
Related Products
- Stainless Steel 304 Flanges
- Stainless Steel 304L Flanges
- Stainless Steel 304H Flanges
- Stainless Steel 310 Flanges
- Stainless Steel 310S Flanges
- Stainless Steel 316 Flanges
- Stainless Steel 316L Flanges
- Stainless Steel 316H Flanges
- Stainless Steel 317 Flanges
- Stainless Steel 317L Flanges
- Stainless Steel 321 Flanges
- Stainless Steel 321H Flanges
- Stainless Steel 347 Flanges
- Stainless Steel 347H Flanges
- Stainless Steel 446 Flanges
Frequently Asked Questions
What is Stainless Steel 317 flange?
A Stainless Steel 317 flange is a pipe fitting made from a molybdenum-rich austenitic stainless steel, offering superior corrosion resistance in chemical and high-chloride environments.
What is ASTM A182 F317 flange specification?
ASTM A182 F317 is a standard specification for forged stainless steel flanges used in high-temperature and corrosion-resistant industrial applications.
What is the difference between SS 317 and SS 316 flanges?
SS 317 contains higher molybdenum than SS 316, giving it better resistance to pitting and corrosion, especially in acidic and chloride-rich environments.
What is the temperature resistance of SS 317 flanges?
SS 317 flanges can typically withstand temperatures up to around 870°C in continuous service, depending on operating conditions.
Are SS 317L flanges better for welding than SS 317?
Yes, SS 317L flanges are better for welding because they have lower carbon content, which reduces the risk of carbide precipitation and improves weldability.
