Stainless Steel 321 Flanges are high-performance pipe connection components manufactured from titanium-stabilized austenitic stainless steel grade 321 (UNS S32100). These flanges are designed to provide secure and leak-proof connections in high-temperature and corrosive piping systems. Manufactured according to ASTM A182 F321 standards, they are widely used in industries such as oil & gas, petrochemicals, power plants, and chemical processing. Common types include SS 321 Blind Flange, ANSI B16.5 SS 321 Slip On Flanges, ASTM A182 F321 Socket Weld Flange, SUS 321 Lap Joint Flanges, INOX 321 Ring Type Joint Flange, and AISI 321 Orifice Flanges.
What are Stainless Steel 321 Flanges?
Stainless Steel 321 Flanges are pipe connection components used to join pipes, valves, pumps, and other equipment in industrial piping systems. These flanges are manufactured using stainless steel grade 321, which contains titanium as a stabilizing element. Titanium prevents chromium carbide formation at high temperatures, which improves resistance to intergranular corrosion during welding and long-term service.
Because of this unique composition, SS UNS S32100 Pipe Flanges are ideal for applications where pipes operate under high temperatures and corrosive environments. Industries rely on Stainless Steel F321 Forged Flange products because they offer durability, excellent mechanical strength, and long service life.
As an experienced Stainless Steel 321 Flanges Manufacturer & Supplier in India, we supply a wide range of precision-engineered flanges manufactured according to international standards such as ASTM A182, ASME B16.5, DIN, and GOST.
Advantages of Stainless Steel 321 Flanges
- Excellent High Temperature Resistance: Titanium stabilization allows SS 321 flanges to maintain strength even in high-temperature environments.
- Superior Corrosion Resistance: They resist oxidation and corrosion in chemical and marine environments.
- Excellent Weldability: Unlike many stainless steels, SS 321 flanges can be welded without risk of carbide precipitation.
- Long Service Life: High durability reduces maintenance costs and increases pipeline reliability.
Types of Stainless Steel 321 Flanges
Different piping systems require different flange designs. As trusted ASTM A182 Stainless Steel 321 Flanges Suppliers, we offer several flange types designed for specific industrial applications.
➤ SS 321 Blind Flange
A SS 321 Blind Flange is used to close the end of a piping system. It blocks fluid flow and allows future expansion or inspection of the pipeline. Blind flanges are commonly used in pressure systems where safety and reliability are essential.
➤ ANSI B16.5 SS 321 Slip On Flanges
ANSI B16.5 SS 321 Slip On Flanges are designed to slide over the pipe and then be welded from both the inside and outside. This design provides excellent alignment and reduces installation time, making them popular in medium-pressure piping systems.
➤ ASTM A182 F321 Socket Weld Flange
The ASTM A182 F321 Socket Weld Flange is designed for small-diameter high-pressure pipelines. The pipe is inserted into the flange socket before welding, ensuring strong joints and smooth fluid flow.
➤ SS GOST 08X18H10 Socket Weld Flanges
SS GOST 08X18H10 Socket Weld Flanges follow Russian GOST standards and are widely used in projects that require compatibility with international piping specifications.
➤ SUS 321 Lap Joint Flanges
SUS 321 Lap Joint Flanges are commonly used with stub ends. They allow easy alignment and are suitable for piping systems that require frequent dismantling or maintenance.
➤ INOX 321 Ring Type Joint Flange
The INOX 321 Ring Type Joint Flange is designed for high-pressure and high-temperature applications. Its metal-to-metal sealing design makes it ideal for oil and gas pipelines.
➤ AISI 321 Orifice Flanges
AISI 321 Orifice Flanges are used to measure fluid flow within pipelines. They allow installation of an orifice plate between two flanges for accurate flow measurement.
Stainless Steel 321 Flanges Specifications
| Specification | Details |
|---|---|
| Material Grade | Stainless Steel 321 |
| UNS Number | UNS S32100 |
| Standard | ASTM A182 / ASME SA182 |
| Flange Types | Blind, Slip On, Socket Weld, Lap Joint, Orifice, RTJ |
| Size Range | ½” NB to 48” NB |
| Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 |
| Standards | ANSI B16.5, ASME B16.47, DIN, EN, GOST |
| Manufacturing Method | Forged |
Chemical Composition of SS 321 Flanges
| Element | Percentage |
|---|---|
| Carbon | 0.08 max |
| Chromium | 17 – 19 |
| Nickel | 9 – 12 |
| Titanium | 5×C – 0.70 |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Phosphorus | 0.045 max |
| Sulfur | 0.030 max |
Titanium improves high-temperature stability and corrosion resistance, making SS 321 flanges suitable for demanding industrial environments.
Mechanical Properties of Stainless Steel 321 Flanges
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 40 % |
| Hardness | 95 HRB Max |
These mechanical properties allow Stainless Steel F321 Forged Flange products to withstand high pressure and heavy industrial use.
Physical Properties of Stainless Steel 321 Flanges
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1398 – 1454°C |
| Thermal Conductivity | 16.3 W/mK |
| Electrical Resistivity | 0.72 µΩ·m |
Applications of Stainless Steel 321 Flanges
Stainless Steel 321 Flanges are widely used in several industrial sectors.
- Oil and Gas Industry: Used in pipelines, offshore platforms, and refineries.
- Petrochemical Industry: Ideal for transporting corrosive chemicals and gases.
- Power Plants: Used in boilers, turbines, and heat exchanger piping systems.
- Aerospace Industry: The heat resistance of SS UNS S32100 Pipe Flanges makes them suitable for aircraft exhaust systems.
- Chemical Processing Plants: Widely used in reactors, pressure vessels, and chemical pipelines.
Quality Assurance and Testing
As trusted ASTM A182 Stainless Steel 321 Flanges Suppliers, we follow strict quality control procedures to ensure reliability and durability. Our testing procedures include:
- Raw material inspection
- Chemical composition testing
- Mechanical testing
- Ultrasonic testing
- Hydrostatic pressure testing
- Dimensional inspection
These tests ensure that each SS 321 Blind Flange, ANSI B16.5 SS 321 Slip On Flanges, and ASTM A182 F321 Socket Weld Flange meets international quality standards.
Related Stainless Steel Flanges
You can internally link this page to:
- Stainless Steel 304 Flanges
- Stainless Steel 304L Flanges
- Stainless Steel 316 Flanges
- Stainless Steel 316L Flanges
- Stainless Steel 321H Flanges
- Stainless Steel 347 Flanges
Request a Quote for Stainless Steel 321 Flanges
If you are searching for a reliable Stainless Steel 321 Flanges Manufacturer & Supplier in India, we offer high-quality flanges manufactured according to global standards.
Our range includes:
- SS 321 Blind Flange
- ANSI B16.5 SS 321 Slip On Flanges
- ASTM A182 F321 Socket Weld Flange
- SUS 321 Lap Joint Flanges
- INOX 321 Ring Type Joint Flange
- AISI 321 Orifice Flanges
Contact our team today to receive product specifications, pricing, and delivery details for your industrial requirements.
Frequently Asked Questions
Request Your Stainless Steel 321 Flanges Quote Today!
