... Flange, LJ Flange, SW Flange, Thread Flange2). Diameter range: 1/2'' ~24'' (DN15~600)3). Pressure class: 150 - 1, 500Lbs4). Standard ... , JPI 7S-15, GB9112~9124, SH34065). Use: It has good welding performance, widely used in Petroleum, Chemical industry, Machinery, Electric power ... : Carbon steel, stainless steel, Alloy steel, Low-temperature steel. rst37.2 steel flanges