Stainless Steel 316/316L Flanges
Midland Alloys is a leading Stainless Steel 316/316L Flanges Manufacturer in India, providing an extensive array of high-quality flanges for critical piping applications. These flanges are constructed from austenitic stainless steel that resists corrosion commendably, particularly in environments high in chloride. Stainless Steel 316 Flanges include molybdenum, making them stronger, and more resistant to pitting. 316L flanges are a low-carbon variant of the same grade that is best suited for welded construction, as it limits carbide precipitation. We produce these flanges according to ASTM A182/ASME SA182 specifications in a variety of sizes, pressure classes, and forms to meet the demands of international projects. Our flanges operate at temperatures of up to 870°C and are available in nominal bore sizes ranging from ½ inch to 48 inches. All our flanges are accurately forged, machined and heat treated to provide excellent mechanical properties and strength. We provide Weld Neck (WNRF), Slip-On (SORF), Blind (BLRF), Lap Joint (SOLJ), Socket Weld (SWRF), Screwed (Threaded) and Long Weld Neck (LWNRF) Flanges each one of which is for particular piping requirements. We supply these flanges in custom and standard sizes to chemical plants, offshore facilities, refineries, power plants, and others globally.
Benefits of ASTM A182 F316L Stainless Steel Flanges
ASTM A182 F316L Stainless Steel Flanges provide reliable performance and long-term durability across demanding applications. They are suitable for corrosive and high-temperature environments.
- Excellent resistance to pitting, and crevice corrosion in seawater and chemicals.
- Maintains its strength without warping or scaling at high temperatures.
- 316L’s low carbon content reduces the possibility of intergranular corrosion after welding.
- In food and pharmaceutical systems a smooth surface texture promotes hygienic use.
- High capacity to handle pressure, with minimal distortion.
- Available with precise machining for tight sealing connections.
- Resistant to chloride-induced stress cracking in marine and oilfield conditions.
Stainless Steel 316/316L Flanges Specification
1/2" (15 NB) to 48" (1200NB)
ASTM A182 / ASME SA182
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Threaded / Screwed / Forged / Plate
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Forging, Rolling, Casting
FNPT, NPT, BSPT, MNPT, BSPP
Contact us today to discuss how Stainless Steel 316/316L Flanges can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
The international equivalent grades of SS 316/316S make it easy to match specifications across different global standards such as UNS, WERKSTOFF, and EN.
| Standard | Grade / Equivalent |
|---|---|
| AISI / ASTM | 316 / 316L |
| UNS | S31600 / S31603 |
| EN / DIN | 1.4401 / 1.4404 |
| JIS | SUH316 / SUS316L |
| GB / China | 06Cr17Ni12Mo2 / 00Cr17Ni12Mo2 |
| Werkstoff / Germany | 1.4401 / 1.4404 |
| AFNOR / France | Z2CND17-12 |
| BS / UK | 316S16 / 316S11 |
This table provides the detailed chemical composition of stainless steel 316 and 316S flanges, showcasing the percentages of elements like chromium, nickel, and carbon that contribute to their high-temperature strength and corrosion resistance.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 316 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 – 18.00 | 2.00 – 3.00 | 11.00 – 14.00 | 67.845 min |
| SS 316L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 – 18.00 | 2.00 – 3.00 | 10.00 – 14.00 | 68.89 min |
| SS 316H | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.030 max | 16.00 – 18.00 | 2.00 – 3.00 | 10.00 – 14.00 | 68.89 min |
The mechanical properties such as tensile strength, yield strength, and elongation. These values help assess the flange’s performance under pressure and temperature conditions.
| Density | Melting Point | Tensilee Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Stainless Steel Flanges Grades We Offer
Difference Between Stainless Steel 316/316L Flanges vs Super Duplex Steel Flanges
Stainless steel 316/316L flanges are widely used for general industrial use due to their excellent corrosion resistance and moderate strength. Super Duplex Steel Flanges, on the other hand, are stronger and more resistant to stress corrosion cracking, particularly in harsh chloride environments like chemical plants and submerged pipelines. Super Duplex flanges are preferred for higher pressure systems, with lower corrosion allowance even though 316/316L flanges function effectively at temperatures as high as 870°C. Super Duplex alternatives are selected for harsh environments where both high strength, and excellent corrosion resistance are crucial, whereas stainless steel 316/316L slip on flanges are frequently used, where affordability, and weldability are important considerations.
Plate
Shear
Press
Inspection
Lathe
Drilling
Cleaning
Flange
Inspection
Analytic
Marking
Packing & Shipping
Stainless Steel 316/316L Flanges Application
Why Choose Midland Alloys Inc
Midland Alloys Inc. is a reputable manufacturer of WERKSTOFF NR.1.4404 / 1.4435 slip-on flanges, recognised for producing high-quality products that meet international certifications such as ISO 9001:2015, PED 2014/68/EU and EN 10204 3.1/3.2 Mill Test Certificates. We also offer third-party inspections (TPI) from TÜV, BV, SGS, and DNV so our clients only get the best. Our experience cuts across working with engineering companies, EPC contractors, marine operators, and chemical plants, delivering to their project requirements with accuracy. We have an established record of timely delivery and export compliance for customers in the Middle East, Europe, and Southeast Asia. Each A182 F316L Plate Flange is subjected to thorough in-house and third-party inspection, including Hydrostatic Testing (pressure test), Ultrasonic Testing (UT), Radiographic Testing (RT), and Positive Material Identification (PMI). The mechanical tests, like tensile, hardness, flattening, and bend tests are done as per order specifications. Our customers trust us for reliability, prompt response, and consistent quality supply of Stainless Steel 316L Slip On Flanges and ASTM A182 F316L Stainless Steel Flanges for critical purposes.
FAQs
To ensure compatibility between pipes, valves, and fittings, a flange standard specifies the flange’s dimensions, materials, pressure ratings and tolerances. ASME, ANSI, DIN and ISO are examples of common standards.
Austenitic stainless steel which contains molybdenum, nickel and chromium is used to design SS316 pipe. Its ASTM A312/A213 standard specification provides exceptional corrosion resistance, particularly in chlorine, and marine conditions.
316 flanges are manufactured from grade 316 stainless steel, which has 16–18% chromium, 10–14% nickel and 2–3% molybdenum. These flanges offer high corrosion resistance and durability in challenging conditions.
