api5000Explore hh-quality Weld Neck Flanges from a reputable manufacturer. Our ASTM A105N flange, with a size of 2-116 inches, adheres to API 6A and TYPE API 6B standards. It boasts a sturdySurface, Underwater Safety, and Boarding Shutdown Valves Background Products covered by API 6A include surface safety valves (SSV), underwater safety valves