从China供应商批发进口254smo S31254 Lap Joint Flange — FOB条款

The 254SMO S31254 lap joint flange from Zhengzhou Huitong Pipe Fittings is a high-alloy austenitic stainless steel component designed for extreme corrosion resistance, particularly in chloride-rich environments such as seawater, pulp and paper processing, and chemical handling. This flange type uses a stub end for welding to the pipe, allowing the flange itself to rotate freely for alignment, with sizes ranging from 1/2 inch to 160 inches and a maximum outer diameter of 5000 mm. It conforms to ANSI B16.5, ASME B16.47 Series A and B, and other international standards like DIN 2527 and JIS B2220, with pressure class ratings from Class 150 to Class 6000.

Constructed from UNS S31254 (254SMO), this flange offers superior resistance to pitting, crevice corrosion, and stress corrosion cracking compared to standard 316L grades, thanks to its high chromium (20%), molybdenum (6%), and nitrogen (0.2%) content. The material is typical for applications where standard austenitic stainless steels fail, such as in offshore oil platforms, desalination plants, and flue gas desulfurization systems. Face types include raised face (RF), flat face (FF), and ring type joint (RTJ), with typical surface finishes meeting ASME B16.5 requirements for smooth, defect-free sealing surfaces.

Industrial buyers in petroleum, chemical, and marine sectors source this flange for systems requiring long-term reliability under high salinity or acidic conditions. It is paired with stub ends of matching material grade, while packaging options include plywood or wooden cases for export. Buyers should confirm dimensional tolerances, material test certificates (MTCs) per EN 10204 3.1, and NACE MR0175 compliance for sour service applications. Lead times and incoterms are supplier-specific, with FOB or CFR terms common for bulk shipments from Chinese ports like Tianjin or Shanghai.

Zhengzhou Huitong Pipe Fittings operates from Room 2004, Expo Center, Dongfeng Road in Zhengzhou, Henan Province, China. The company specializes in manufacturing and exporting a broad range of pipe fittings, including flanges, elbows, tees, and reducers, with materials spanning carbon steel, stainless steel, duplex, nickel alloys, and high-performance grades like 254SMO. Its product catalog aligns with international standards such as ASME, ANSI, DIN, and JIS, catering to industries like petroleum, chemical, and shipbuilding.

The supplier is classified under the imported tier with a harbor trust tier, indicating a focus on export markets. While the listed response rate and average response hours are currently zero, the company’s physical address and product breadth suggest established operations. Buyers are advised to directly confirm verification status, production lead times, and quality control processes, as these details are not explicitly stated in the profile.