A105N Weld Neck Sulfide Resistant Forged Flange, ASME B16.5

Dingxiang Jinyu Flange specializes in manufacturing high-quality A105N carbon steel weld neck forged flanges complying with ASME B16.5 standard, which have been steadily supplied to oil, gas and petrochemical engineering projects in the United States for years.The products are fully die-forged and subject to standardized normalizing heat treatment. Manufactured in strict accordance with NACE MR0175 sulfide resistance specifications, they feature precisely controlled sulfur and phosphorus impurity contents with overall hardness limited to ≤187HBW, effectively preventing SSC sulfide stress cracking and HIC hydrogen-induced cracking under wet hydrogen sulfide service conditions.

All flanges are precision-machined by full CNC equipment. Sealing faces including RF raised face and RTJ ring joint face are available as required, covering all pressure classes from Class 150 to 2500. Each piece undergoes UT and MT non-destructive testing before delivery, with complete MTR material test reports, hardness inspection certificates and heat treatment documents provided.The tapered weld neck design ensures uniform stress distribution and excellent weldability, ideal for sulfur-containing natural gas and refinery gathering & transmission pipelines.With rich experience in export business to the US, we offer customized sizes per American project requirements, adopt moisture-proof wooden cases for export packaging, maintain stable supply capacity and welcome long-term bulk strategic cooperation.