WN flange ASTM-A/SA105N from China Zlconn applyt for pipeline construction

Flange：Piping components can be bolted together between flanges. Flanges are used to connect pipes with each other, to valves, to fittings. It devided into many kinds of flanges
Standard: ASME B16.5 or ASME B16.47, and MSS SP-44
ASME B16.5 refers to nominal pipe sizes (NPS) from 1⁄2″ to 24″. B16.47 covers NPSs from 26″ to 60″. Each specification further delineates flanges into pressure classes: 150, 300, 400, 600, 900, 1500 and 2500 for B16.5, and B16.47 delineates its flanges into pressure classes 75, 150, 300, 400 , 600, 900
Material:carbon steel, stainless steel,alloy steel……