... :carbon steel,stainless steel,alloy steel Flange 1). Type: WN Flange, SO Flange, RTJ Flange, BL Flange, LJ Flange, SW Flange, Thread Flange 2). Diameter range: 1/2 ... , Alloy steel, Low-temperature steel. 5). Use: It has good welding performance, widely used in Petroleum, Chemical industry, Machinery, Electric power ... interested in, pls don't hesitate to contact carbon steel flange