SS 316/316L flange manufacturer, Mumbai. ASTM A182 F316/F316L, chloride & marine grade. All flange types, Class 150-2500. EN 10204 3.1/3.2. Quote in 30 min.
ASTM A182 F316/F316L flanges incorporate 2-3% Molybdenum for exceptional resistance to chloride pitting, crevice corrosion, and aggressive process chemicals in marine, chemical, and offshore installations.
Governing specification limits per ASTM / ASME standards. Actual values provided on EN 10204 3.1 MTC.
| Element | Specification Limit / Composition |
|---|---|
| Molybdenum (Mo) | 2.00 - 3.00% |
| Chromium (Cr) | 16.0 - 18.0% |
| Nickel (Ni) | 10.0 - 14.0% |
| Carbon (C) | 0.08 max (F316) |
| Property | Specification Limit |
|---|---|
| Yield Strength | 205 MPa min (F316) |
| Tensile Strength | 515 MPa min (F316) |
| Hardness | 95 HRB max |
| Service Temp | Class 150 | Class 300 | Class 600 | Class 900 |
|---|---|---|---|---|
| Ambient (-29 to 38°C) | 275 psi | 720 psi | 1440 psi | 2160 psi |
Flanges in Stainless Steel 316/316L Flanges are manufactured via precision closed-die or open-die forging to establish continuous metallurgical grain flow along the flange hub and neck contour. Raw billets are heated in calibrated gas-fired furnaces under strictly controlled soak temperatures to eliminate microstructural defects.
Depending on the alloy grade, components undergo certified thermal conditioning: normalizing for carbon steels (A105N, A350 LF2), rapid water quench solution annealing at 1040°C–1120°C for stainless and duplex grades, or controlled aging for nickel superalloys. This ensures exceptional notch toughness, yield strength, and resistance to stress corrosion cracking.
Final machining is executed on heavy-duty CNC turning centers to guarantee precise raised face, flat face, or ring type joint (RTJ) dimensions compliant with ASME B16.5, ASME B16.47, DIN, or EN 1092-1 standards. Gasket contact surfaces receive spiral or concentric serrations strictly controlled between 125 and 250 µin Ra.
Every production heat is issued with an EN 10204 Type 3.1 inspection certificate containing full heat chemistry, mechanical tensile test data, and Charpy impact values. Independent Third-Party Inspection (TPI) by Lloyd's, BV, DNV-GL, TÜV, and SGS is readily accommodated for global EPC and refinery contracts.
A: No. In low-velocity or stagnant seawater, 316 can experience pitting/crevice corrosion. Duplex 2205 or Super Duplex 2507 is recommended for continuous stagnant seawater exposure.
Written commercial offer with Mill Test Certificate guarantee.