Stainless Steel 304 and 304L Flanges are essential components in various industrial applications, known for their corrosion resistance, durability, and versatility. These flanges are part of the 300 series stainless steel family, with 304 being the most commonly used alloy and 304L being a low-carbon variant.
Composition and Properties: Stainless Steel 304 is composed of iron, chromium, nickel, and small amounts of manganese and silicon. The addition of chromium provides excellent corrosion resistance, making it suitable for a wide range of environments, including those with exposure to acids and chlorides. The low-carbon variant, 304L, minimizes carbide precipitation during welding, reducing the risk of corrosion in welded structures.
Corrosion Resistance: One of the key attributes of Stainless Steel 304L Flanges is their exceptional corrosion resistance. They exhibit resistance to a variety of corrosive media, including acids, alkalis, and chloride-bearing environments. This corrosion resistance makes them suitable for applications in chemical processing, food processing, and marine environments.
Applications: Stainless Steel 304 Flanges find applications in diverse industries such as oil and gas, petrochemical, chemical processing, pharmaceuticals, and food processing. They are used for connecting pipes, valves, pumps, and other equipment, providing a secure and leak-free connection.
Types of Flanges: These SS 304 flanges are available in various types, including Stainless Steel 304 Weld Neck Flange, SS 304L Slip-On Flanges, SS 304 Socket Weld Flanges, SS 304 Blind Flanges, and SS 304 Threaded Flanges, among others. The choice of flange type depends on the specific requirements of the application and the piping system.
Standards and Specifications: Stainless Steel 304L Flanges are manufactured in compliance with international standards such as ASTM A182 and ASME B16.5. These standards ensure that the flanges meet the required mechanical properties, dimensions, and testing criteria.
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Advantages:
Durability: Stainless Steel 304 flanges have a high resistance to corrosion and oxidation, contributing to their long service life.
Versatility: They can withstand a wide range of temperatures and harsh environments.
Ease of Fabrication: The low carbon content in 304L enhances its weldability, making fabrication processes more manageable.
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.)
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
| SS 304 | S30400 | 1.4301 | Z7CN18‐09 | X5CrNi18-10 | SUS 304 | 304S31 | 08Х18Н10 |
| SS 304L | S30403 | 1.4306/1.4307 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | 304S11 | 03Х18Н11 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 11 | – |
| SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18 – 20 | – | 8 – 13 | – |
| Grade | Density | Melting Point | Tensilee Strength | Yield Strength (0.2%Offset) | Elongation |
| SS 304/304L | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 40 % |
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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