Stainless Steel 904L Flanges are widely used industrial piping components that connect pipes, valves, pumps, and other equipment. These flanges are manufactured using super austenitic stainless steel containing high levels of nickel, chromium, molybdenum, and copper, which provides outstanding corrosion resistance and long service life.
Industries working with aggressive chemicals or high-pressure piping systems require materials that can withstand extreme operating conditions. For this reason, SS UNS N08904 Industrial Flanges are commonly used in environments where standard stainless steel grades may fail.
As an experienced ASTM A182 F904L Pipe Flange Manufacturer in India, we supply high-quality flanges designed to meet international standards and industrial requirements. Our product range includes Alloy 904L Blind Flange, ASME SA182 SS 904L WNRF Flanges, SS DIN 1.4539 Nippo Flanges, ANSI SS 904L Lap Joint Flange, WNR 1.4539 Socket Weld Flange, SS 904L RTJ Flange, INOX 904L Orifice Flanges, AISI 904L Lap Joint Flanges, and 904L SS Reducing Flange for various piping systems.
What are Stainless Steel 904L Flanges?Stainless Steel 904L Flanges are high-alloy austenitic stainless steel pipe flanges manufactured from UNS N08904 / DIN 1.4539 stainless steel. These flanges are designed for highly corrosive environments and provide excellent resistance to sulfuric acid, chloride corrosion, and stress corrosion cracking. Stainless Steel 904L Flanges are widely used in chemical processing, offshore oil and gas, pharmaceuticals, and marine applications because they provide strong, leak-proof pipe connections even in aggressive environments.
What is Stainless Steel 904L?
Stainless Steel 904L is a low carbon, high nickel alloy stainless steel known for its excellent corrosion resistance in harsh chemical environments. The alloy contains high levels of nickel and molybdenum, along with copper, which improves resistance to acids and chloride environments.
Because of these properties, SS DIN 1.4539 stainless steel is commonly used in industries where materials must resist aggressive chemicals and corrosive media.
Key Characteristics of 904L Stainless Steel- Excellent resistance to sulfuric and phosphoric acids
- High resistance to pitting and crevice corrosion
- Strong resistance to stress corrosion cracking
- Excellent weldability and formability
- High durability in chloride environments
These characteristics make SS UNS N08904 Industrial Flanges a preferred choice for demanding industrial environments.
Key Features of Stainless Steel 904L Flanges
- Excellent Corrosion Resistance: The alloy provides superior resistance to acids, chlorides, and seawater corrosion.
- High Strength: ASME SA182 SS 904L WNRF Flanges maintain structural strength even under high pressure.
- Long Service Life: Because of their durability, these flanges require minimal maintenance.
- Leak-Proof Connections: Precision machining ensures reliable sealing and alignment.
- Versatile Applications: Available in many types including SS 904L RTJ Flange, INOX 904L Orifice Flanges, and AISI 904L Lap Joint Flanges.
Types of Stainless Steel 904L Flanges
Different industrial piping systems require different flange designs. We manufacture and supply a wide range of Stainless Steel 904L Flanges suitable for various applications.
➤ ASME SA182 SS 904L WNRF Flanges
ASME SA182 SS 904L WNRF Flanges (Weld Neck Raised Face) are designed for high-pressure and high-temperature pipelines. The long tapered hub reduces stress concentration and strengthens the pipe connection.
➤ Alloy 904L Blind Flange
An Alloy 904L Blind Flange is used to seal the end of a piping system. These flanges allow easy inspection and maintenance of pipelines.
➤ ANSI SS 904L Lap Joint Flange
The ANSI SS 904L Lap Joint Flange is used together with a stub end and is commonly used in systems where frequent dismantling is required.
➤ WNR 1.4539 Socket Weld Flange
A WNR 1.4539 Socket Weld Flange is designed for small-diameter high-pressure pipelines. The pipe is inserted into the flange socket and welded to create a strong connection.
➤ SS DIN 1.4539 Nippo Flanges
SS DIN 1.4539 Nippo Flanges combine a flange with a pipe fitting and are used for branch connections in pipelines.
➤ SS 904L RTJ Flange
SS 904L RTJ Flange (Ring Type Joint) is used in high-pressure systems where a metal gasket provides a tight seal.
➤ INOX 904L Orifice Flanges
INOX 904L Orifice Flanges are used with orifice plates to measure the flow of liquids and gases in pipelines.
➤ 904L SS Reducing Flange
A 904L SS Reducing Flange connects pipes of different diameters and helps maintain proper fluid flow.
Stainless Steel 904L Flanges Specifications
| Specification | Details |
|---|---|
| Material Grade | Stainless Steel 904L |
| UNS Number | UNS N08904 |
| DIN Number | DIN 1.4539 |
| ASTM Standard | ASTM A182 F904L |
| Pressure Rating | Class 150 – Class 2500 |
| Size Range | ½” to 48” |
| Flange Types | WNRF, Blind, Lap Joint, Socket Weld, RTJ, Orifice, Reducing |
| Manufacturing Method | Forged / Machined |
Chemical Composition of Stainless Steel 904L
| Element | Percentage |
|---|---|
| Nickel (Ni) | 23 – 28% |
| Chromium (Cr) | 19 – 23% |
| Molybdenum (Mo) | 4 – 5% |
| Copper (Cu) | 1 – 2% |
| Carbon (C) | ≤ 0.02% |
| Manganese (Mn) | ≤ 2% |
Mechanical Properties of Stainless Steel 904L
| Property | Value |
|---|---|
| Tensile Strength | 490 MPa |
| Yield Strength | 220 MPa |
| Elongation | 35% |
| Density | 8.0 g/cm³ |
Applications of Stainless Steel 904L Flanges
Stainless Steel 904L Flanges are used in many demanding industries.
- Chemical Processing Industry: Used in pipelines carrying corrosive chemicals.
- Oil and Gas Industry: Offshore pipelines and refinery systems require corrosion- resistant flanges.
- Pharmaceutical Industry: Maintains hygienic and corrosion-resistant piping systems.
- Marine Applications: Resists seawater corrosion and chloride environments.
- Power Generation: Used in high-pressure steam and cooling systems.
- Pulp and Paper Industry: Handles aggressive chemicals used in paper processing.
Related Stainless Steel Flanges
We also supply:
- Stainless Steel 304 Flanges
- Stainless Steel 316 Flanges
- Stainless Steel 321 Flanges
- Stainless Steel 347 Flanges
- Duplex Steel Flanges
Why Choose Our Stainless Steel 904L Flanges
Industries require piping components that deliver reliable performance in extreme conditions. Our Stainless Steel 904L Flanges are manufactured using premium materials and advanced forging technology. Key benefits include:
- Manufactured according to ASTM A182 / ASME SA182 standards
- Wide range including Alloy 904L Blind Flange and SS 904L RTJ Flange
- Precision machining for perfect bolt alignment
- Strict quality inspection and testing
- International export packaging
- Available in multiple sizes and pressure classes
These features ensure long-lasting and reliable performance.
Stainless Steel 904L Flanges Exporter
As a trusted Stainless Steel 904L Flanges Exporter, we supply products to industries across the world. Our logistics team ensures safe packaging and timely delivery. Our export range includes:
- SS DIN 1.4539 Nippo Flanges
- ANSI SS 904L Lap Joint Flange
- WNR 1.4539 Socket Weld Flange
- 904L SS Reducing Flange
Stainless Steel 904L Flanges are high-performance industrial piping components designed for corrosive environments and high-pressure systems. With excellent corrosion resistance, strong mechanical properties, and versatile designs such as Alloy 904L Blind Flange, ASME SA182 SS 904L WNRF Flanges, SS 904L RTJ Flange, and INOX 904L Orifice Flanges, these flanges provide reliable and durable piping connections across industries.
Frequently Asked Questions
- ASTM A182 F904L
- ASME SA182
- ANSI B16.5
- DIN 1.4539
- Alloy 904L Blind Flange
- ASME SA182 SS 904L WNRF Flanges
- SS 904L RTJ Flange
- INOX 904L Orifice Flanges
- 904L SS Reducing Flange
Request Your Stainless Steel 904L Flanges Quote Today!
