Stainless Steel 317 and 317L Flanges are austenitic stainless steel grades known for their excellent corrosion resistance and high strength at elevated temperatures. These grades are often used in applications where resistance to chemical attack and corrosion is critical, such as in the chemical processing, petrochemical, and pharmaceutical industries. Stainless Steel 317 Flanges are integral components in piping systems, providing a method for connecting pipes, valves, pumps, and other equipment.
Chemical Composition: Stainless Steel 317 contains chromium, nickel, molybdenum, and other elements that contribute to its corrosion resistance properties. The low carbon content of 317L further enhances its corrosion resistance and makes it suitable for welding applications.
Key Features:
Corrosion Resistance: Stainless Steel 317/317L exhibits excellent corrosion resistance in a wide range of corrosive environments, including acids, bases, and chloride-containing media.
High-Temperature Strength: These grades maintain their strength at high temperatures, making them suitable for applications involving elevated temperatures.
Weldability: The low carbon content of SS 317L improves its weldability, reducing the risk of sensitization and intergranular corrosion during welding.
Table Of Content
Applications: Stainless Steel 317 flanges find applications in various industries, including:
Chemical Processing: for handling corrosive chemicals.
Petrochemical Industry: in equipment exposed to aggressive environments.
Pharmaceutical Industry: for applications requiring high purity and corrosion resistance
Oil and Gas: in offshore and onshore facilities where corrosion resistance is crucial.
Flange Types: Common types of flanges available in Stainless Steel 317 include:
SS 317 Weld Neck Flanges: Designed for high-pressure applications, providing a smooth transition from pipe to flange.
SS 317L Slip-On Flanges: Easy to align and suitable for low-pressure applications.
SS 317 Blind Flanges: Used to close the end of a pipe, providing easy access for inspection or cleaning.
SS 317L Socket Weld Flanges Well-suited for smaller-sized pipes and high-pressure applications.
ASTM A182 / ASME SA182, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
1/2" (15 NB) to 48" (1200NB)
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Forged / Threaded / Screwed / Plate
Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange, Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange.
All Flanges are marked as follows: Grade, Standard, Thickness, Heat No. (Or according to the customer’s request.)
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 317 | S31700 | – | – | 1.4449 | – | – | – |
| 317L | S31703 | – | – | 1.4438 | – | – | – |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 317 | min. | – | – | – | – | – | 18.0 | – | 11.0 | – |
| max. | 0.8 | 2.0 | 1.00 | 0.040 | 0.03 | 20.0 | 14.0 | – | ||
| 317L | min. | – | – | – | – | – | 18.0 | 3.00 | 11.0 | – |
| max. | 0.03 | 2.0 | 0.75 | 0.040 | 0.03 | 20.0 | 4.00 | 15.0 | – | |
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 317 | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
| 317L | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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