Stainless Steel 317 Flanges are high-performance pipe flanges manufactured from a molybdenum-rich austenitic stainless steel alloy. This grade offers superior corrosion resistance compared to many conventional stainless steels, making it ideal for demanding industrial environments such as chemical processing, oil and gas, marine engineering, and power generation.
As experienced ASTM A182 Stainless Steel 317 Flanges Suppliers, we provide a complete range of flange types including ASTM A182 SS 317 Weldneck Flange, 317 SS SORF Flange, Stainless Steel 317 Blind Flange, DIN 1.4449 Flat Flange, DIN 1.4449 Lap Joint Flange, and ASME SA182 SS 317 Socketweld Flange. These flanges are manufactured in compliance with international standards and are available in various pressure classes, sizes, and face types.
Our stainless steel 317 flanges are designed to deliver reliable performance in environments where corrosion resistance, durability, and strength are essential.
What are Stainless Steel 317 Flanges?
Stainless Steel 317 flanges are forged piping components used to connect pipes, valves, pumps, and other equipment in a piping system. They provide a secure and leak-proof joint when bolted together with gaskets.
The material UNS S31700 contains higher molybdenum content compared to SS 316, which improves resistance to chemical corrosion, especially in chloride-rich environments.
This makes UNS S31700 Forge Flange products suitable for applications such as:
- chemical plants
- fertilizer industries
- offshore platforms
- pulp and paper processing
- pharmaceutical manufacturing
Because of their excellent mechanical strength and corrosion resistance, stainless steel 317 flanges are widely used in critical piping systems.
Advantages of Stainless Steel 317 Flanges
- Superior Corrosion Resistance: The high molybdenum content improves resistance to chlorides, acids, and aggressive chemicals.
- Excellent Strength: SS 317 flanges maintain structural integrity even under high pressure and temperature conditions.
- Good Weldability: These flanges can be welded using standard welding techniques, making installation easier.
- Long Service Life: Due to their corrosion resistance and mechanical durability, they require minimal maintenance.
Types of Stainless Steel 317 Flanges
Different flange types are used depending on piping design, pressure conditions, and installation requirements.
➤ ASTM A182 SS 317 Weldneck Flange
The ASTM A182 SS 317 Weldneck Flange is designed with a long tapered hub that provides smooth stress distribution. This flange is welded directly to the pipe, which makes it ideal for high-pressure and high-temperature applications.
➤ 317 SS SORF Flange
The 317 SS SORF Flange (Slip On Raised Face Flange) slides over the pipe and is welded in place. This design simplifies installation and alignment, making it suitable for moderate pressure systems.
➤ Stainless Steel 317 Blind Flange
The Steel 317 Blind Flange is used to seal the end of a piping system or pressure vessel opening. It allows pipelines to be closed for maintenance or inspection purposes.
➤ ASME SA182 SS 317 Socketweld Flange
The ASME SA182 SS 317 Socketweld Flange is used for small diameter pipelines. The pipe fits into the socket end and is then welded, creating a strong and leak-proof connection.
➤ UNS S31700 Forge Flange
The UNS S31700 Forge Flange is produced using forging processes that improve structural strength and grain alignment, resulting in enhanced durability and performance.
➤ DIN 1.4449 Flat Flange
The DIN 1.4449 Flat Flange follows DIN standards and is widely used in European piping systems where flat face sealing surfaces are required.
➤ DIN 1.4449 Lap Joint Flange
The DIN 1.4449 Lap Joint Flange is designed to work with stub ends and allows the flange to rotate around the pipe. This makes alignment easier during installation.
➤ UNS S31700 Groove Flange
The UNS S31700 Groove Flange features a grooved connection system for faster installation and maintenance in industrial piping systems.
Stainless Steel 317 Flanges Specification
| Specification | Details |
|---|---|
| Material Grade | Stainless Steel 317 |
| UNS Number | UNS S31700 |
| DIN Equivalent | DIN 1.4449 |
| Standard | ASTM A182 / ASME SA182 |
| Flange Types | Weld Neck, Slip On, Blind, Socket Weld, Lap Joint, Groove, Flat |
| Size Range | ½” to 48” NB |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Face Types | RF, FF, RTJ |
| Standards | ANSI B16.5, ANSI B16.47, DIN, EN |
Stainless Steel 317 Chemical Composition
| Element | Composition (%) |
|---|---|
| Chromium | 18 – 20 |
| Nickel | 11 – 15 |
| Molybdenum | 3 – 4 |
| Carbon | 0.08 Max |
| Manganese | 2 Max |
| Silicon | 1 Max |
| Phosphorus | 0.045 Max |
| Sulfur | 0.03 Max |
| Iron | Balance |
Mechanical Properties of SS 317 Flanges
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 35 % |
| Hardness | 95 HRB Max |
Physical Properties of Stainless Steel 317
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1370 – 1400 °C |
| Thermal Conductivity | 16 W/mK |
| Modulus of Elasticity | 193 GPa |
Stainless Steel 317 Flanges Weight Chart
| Size | Weight |
|---|---|
| ½” | 1.5 kg |
| 1” | 2.2 kg |
| 2” | 4.8 kg |
| 4” | 10.2 kg |
| 6” | 18.5 kg |
| 8” | 29.4 kg |
Applications of Stainless Steel 317 Flanges
Stainless steel 317 flanges are used in industries where high corrosion resistance and reliability are critical. Common applications include:
- Chemical processing plants
- Petrochemical industries
- Oil and gas pipelines
- Marine engineering
- Power generation plants
- Pulp and paper mills
- Pharmaceutical industries
- Water treatment facilities
These industries rely on components such as ASTM A182 SS 317 Weldneck Flange and ASME A182 SS 317 Weldneck Flange and ASME SA182 SS 317 Socketweld Flange for safe and efficient piping systems.
Stainless Steel 317 Flanges Suppliers
Choosing experienced ASTM A182 Stainless Steel 317 Flanges Suppliers ensures the reliability and performance of your piping system.
We supply a wide range of stainless steel 317 flanges including UNS S31700 Forge Flange, DIN 1.4449 Flat Flange, DIN 1.4449 Lap Joint Flange, Stainless Steel 317 Blind Flange, and 317 SS SORF Flange. Our products are manufactured using high-quality raw materials and advanced production techniques to meet international standards.
Frequently Asked Questions
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