317L Stainless Steel Flanges are high-performance piping components manufactured from low-carbon austenitic stainless steel that provides excellent corrosion resistance and superior weldability. These flanges are commonly used in pipelines that operate in aggressive environments such as chemical processing plants, petrochemical industries, marine systems, and power generation facilities.
Because of their higher molybdenum content and low carbon composition, SS 317L flanges offer improved resistance to pitting, crevice corrosion, and chemical attack compared to standard stainless steel grades.
As an experienced ASTM A182 F317L Blind and Slip On Flange Manufacturer in India, we supply a complete range of 317L Stainless Steel Flanges including 317L SS Weldneck Flanges, Stainless Steel 317L Slip On Flange, Stainless Steel 317L Blind Flange, UNS S31703 Threaded Flanges, SUS 317L Forged Pipe Flange, INOX 317L Blind Flange, AISI 317L Blind Flanges, ASTM A182 F317L Blind Flanges, and WNR 1.4438 Weld Neck Flange in multiple sizes and pressure ratings.
Our flanges are manufactured using high-quality raw materials and advanced forging processes to meet international piping standards and demanding industrial applications.
What are 317L Stainless Steel Flanges?
317L Stainless Steel Flanges are forged pipe flanges used to connect pipes, valves, pumps, and other equipment in piping systems. These flanges create a secure mechanical joint when bolted together with a gasket placed between the flange faces.
The material UNS S31703 is the low-carbon version of stainless steel 317. The reduced carbon content improves resistance to carbide precipitation during welding, which helps maintain corrosion resistance even after fabrication.
Due to these characteristics, SS 317L flanges are widely used in industries where pipelines carry corrosive chemicals, high-temperature fluids, or aggressive process media.
Advantages of SS 317L Flanges
- Excellent Corrosion Resistance: The high molybdenum content improves resistance to chemical corrosion, chlorides, and aggressive industrial environments.
- Low Carbon Content: The low carbon composition reduces carbide precipitation during welding, improving corrosion resistance in welded structures.
- High Strength and Durability: SS 317L flanges maintain mechanical strength even under high pressure and temperature conditions.
- Good Fabrication and Weldability: These flanges can be welded using conventional welding techniques without compromising material properties.
- Long Service Life: Because of their durability and corrosion resistance, 317L Stainless Steel Flanges provide reliable performance over long service periods.
Types of Stainless Steel 317L Flanges
Different flange designs are available to meet specific piping requirements. Each type offers unique advantages depending on installation method and operating conditions.
➤ 317L SS Weldneck Flanges
317L SS Weldneck Flanges feature a long tapered hub that gradually transfers stress from the flange to the pipe. This design improves structural strength and reduces the risk of leakage in high-pressure piping systems.
The WNR 1.4438 Weld Neck Flange is widely used in critical industrial applications where strong pipe connections are required.
➤ Stainless Steel 317L Slip On Flange
The Stainless Steel 317L Slip On Flange slides over the pipe and is welded on both sides. This flange type is easier to install and align compared to weld neck flanges.
Slip-on flanges are commonly used in low to medium pressure pipelines where quick installation and cost efficiency are important.
➤ Stainless Steel 317L Blind Flange
The Stainless Steel 317L Blind Flange is used to close the end of a pipeline or pressure vessel opening. This flange prevents fluid flow and allows easy access to the pipeline for inspection and maintenance. Common variations include:
- SS 317L Blind Flanges
- INOX 317L Blind Flange
- AISI 317L Blind Flanges
- ASTM A182 F317L Blind Flanges
These flanges are frequently used in chemical plants, refineries, and industrial processing units.
➤ UNS S31703 Threaded Flanges
UNS S31703 Threaded Flanges contain internal threads that allow them to be screwed directly onto the pipe without welding. These flanges are useful in piping systems where welding is difficult or not recommended.
➤ SUS 317L Forged Pipe Flange
The SUS 317L Forged Pipe Flange is manufactured using forging techniques that enhance mechanical strength and durability. Forged flanges provide improved grain structure and excellent resistance to mechanical stress.
Stainless Steel 317L Flanges Specifications
| Specification | Details |
|---|---|
| Material Grade | Stainless Steel 317L |
| UNS Number | UNS S31703 |
| DIN Equivalent | WNR 1.4438 |
| Standard | ASTM A182 / ASME SA182 |
| Flange Types | Weld Neck, Slip On, Blind, Threaded, Forged |
| 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 317L Chemical Composition
| Element | Percentage |
|---|---|
| Chromium | 18 – 20 % |
| Nickel | 11 – 15 % |
| Molybdenum | 3 – 4 % |
| Carbon | 0.03 % Max |
| Manganese | 2 % Max |
| Silicon | 1 % Max |
| Phosphorus | 0.045 % Max |
| Sulfur | 0.03 % Max |
| Iron | Balance |
Mechanical Properties of SS 317L Flanges
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 35 % |
| Hardness | 95 HRB Max |
Physical Properties of Stainless Steel 317L
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1370 – 1400 °C |
| Thermal Conductivity | 16 W/mK |
| Electrical Resistivity | 0.74 µΩ·m |
| Modulus of Elasticity | 193 GPa |
Stainless Steel 317L Flanges Weight Chart
| Size | Weight |
|---|---|
| ½” | 1.4 kg |
| 1” | 2.2 kg |
| 2” | 4.6 kg |
| 4” | 9.9 kg |
| 6” | 18.1 kg |
| 8” | 28.4 kg |
Applications of SS 317L Flanges
Due to their excellent corrosion resistance and mechanical strength, SS 317L flanges are widely used across many industrial sectors. Common applications include:
- Chemical processing plants
- Petrochemical industries
- Oil and gas pipelines
- Marine engineering
- Power generation plants
- Pulp and paper mills
- Fertilizer plants
- Water treatment facilities
In these industries, components such as 317L SS Weldneck Flanges, Stainless Steel 317L Slip On Flange, and ASTM A182 F317L Blind Flanges are widely used to ensure safe and efficient piping connections.
ASTM A182 F317L Blind and Slip On Flange Manufacturer in India
Selecting a trusted ASTM A182 F317L Blind and Slip On Flange Manufacturer in India is essential for ensuring safe and efficient piping systems. High-quality flanges improve pipeline reliability, reduce maintenance costs, and extend the service life of industrial equipment.
We supply a comprehensive range of 317L Stainless Steel Flanges, including SS 317L Blind Flanges, Stainless Steel 317L Slip On Flange, UNS S31703 Threaded Flanges, SUS 317L Forged Pipe Flange, INOX 317L Blind Flange, AISI 317L Blind Flanges, ASTM A182 F317L Blind Flanges, and WNR 1.4438 Weld Neck Flange.
All products are manufactured using premium raw materials and modern production techniques to meet international standards and industrial requirements.
With extensive industry experience, strict quality control, and a commitment to timely delivery, we provide reliable stainless steel flange solutions for projects worldwide.
Frequently Asked Questions
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