Import F50/S31200 Flange — Buy in Bulk from Supplier in China

The F50/S31200 flange is a duplex stainless steel fitting manufactured to meet ASTM A182 standards, with a chemical composition of approximately 22% chromium, 5.5% nickel, and 3% molybdenum, providing high resistance to chloride stress corrosion cracking. It is available in multiple configurations including welding neck, slip-on, blind, and threaded types, with face types ranging from raised face to ring-type joint as per ANSI B16.5 and DIN standards. Dimensions range from 1/2 inch to 60 inch, with pressure classes from 150 to 2500.

This material grade, also known as UNS S31200, is typically used in aggressive environments such as chemical processing, offshore oil and gas, and desalination plants where pitting and crevice corrosion are concerns. Unlike standard austenitic grades, F50 offers superior strength and corrosion resistance without the risk of sensitization during welding. The manufacturing process includes forging and pressing, ensuring dense grain structure and consistent mechanical properties across batches.

Buyers in the industrial piping sector source this flange for critical high-pressure systems requiring long-term reliability. Packaging is typically in wooden cases with nylon bag lining or custom arrangements as requested. Trade terms are generally FOB China port, with lead times dependent on order volume and customization. MOQ is not specified and must be confirmed directly with the supplier. Certifications such as material test reports are available upon request but not guaranteed without explicit inquiry.

Zhengzhou Huitong Pipe Fittings is an importer and distributor of industrial pipe fittings based in Zhengzhou, Henan Province, China. The company's address is listed as Room 2004, Expo Center Dongfeng Road, indicating a commercial office location. It holds a harbor trust tier, suggesting verified export documentation and compliance with basic trade regulations, but no factory ownership or production capability is confirmed in the listing.

The supplier does not provide details on workforce size, years in operation, or client references. Response rate and average response time are not recorded, indicating limited buyer interaction or operational transparency. The product range includes flanges, elbows, tees, and other fittings across multiple international standards, suggesting a focus on sourcing rather than manufacturing. Buyers should verify material certifications and dimensional accuracy directly before placing orders.