... :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 ... , HG20615~HG20622, BS1560-3.1, NF E29-203, JPI 7S-15, GB9112~9124, SH3406 Material: Carbon steel, stainless steel, Alloy steel ... interested in, pls don't hesitate to contact carbon steel flange