Premium Stainless Steel Flanges: ANSI/DIN 304 & 316 Series for Oil, Gas and Industrial Pipeline Systems

In modern pipeline engineering, stainless steel flanges serve as critical components ensuring system integrity and long-term reliability. We deliver a full spectrum of austenitic stainless steel flanges manufactured to the most demanding international standards.

• ANSI B16.5 — Pipe Flanges and Flanged Fittings (NPS 1/2–24), covering pressure-temperature ratings, dimensions, tolerances, and testing for Class 150–2500.
• ANSI B16.47 — Large Diameter Steel Flanges (NPS 26–60), Series A (MSS SP-44) and Series B (API 605) for large-bore applications.
• DIN Standards — DIN EN 1092-1 for circular flanges with PN designations, ensuring full compliance with European pressure equipment directives.

• Petrochemical & Refining — Aggressive hydrocarbon media, H₂S exposure, catalytic environments.
• Water Treatment & Desalination — Chloride corrosion resistance for seawater and municipal systems.
• Food & Pharmaceutical — Sanitary-grade finishes with full material traceability.
• Natural Gas & LNG — Cryogenic performance down to -196°C for LNG infrastructure.
• Marine & Shipbuilding — Seawater resistance with DNV, ABS, and Lloyd's Register approvals.
• Nuclear Power — N-stamp certified components with rigorous NDE documentation.
• Renewable Energy — Green hydrogen electrolysis, solar thermal, and biomass applications.
• Pipeline Engineering — Demountable connection fittings for pipe sections, valves, pumps, and pressure vessels.

1. Outstanding Corrosion Resistance — Chromium-rich passive oxide layer enhanced by molybdenum in 316/316L provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking. Proprietary electropolishing and passivation treatments further strengthen the natural corrosion barrier.
2. Broad Temperature Adaptability — Engineered for performance from cryogenic -196°C (LNG) to elevated temperatures exceeding 800°C. Material selection and heat treatment optimized for each application temperature envelope.
3. Superior Seal Integrity — Precision CNC-machined sealing faces including raised face (RF), flat face (FF), ring-type joint (RTJ), and tongue-and-groove (T&G) profiles achieve leak-tight connections verified through hydrostatic and pneumatic testing per ASME B16.5.

Quality certified to ISO 9001:2015, PED 2014/68/EU, and AD 2000-Merkblatt. EN 10204 3.1/3.2 inspection certificates available. Every shipment includes material test reports, dimensional inspection records, NDE reports, and certificate of conformance.

With 5,000+ tons annual capacity and global warehousing, we maintain ready stock of standard flanges for immediate dispatch while accommodating custom specifications. Our logistics spans major ports across Asia, Europe, the Middle East, and the Americas. Engineering support and competitive quotation within 24 hours of inquiry.