carbon steel welded neck flange 1:used in machinery parts 2:all size material available ... will be appreciate carbon steel welded neck flange ( we can offer all size and material flange, contact for more details, samples for ... testing is welcoming )Features:1) Stainless steel flange and carbon steel flange 2) Material: 316L, 316Ti, 304L, 321, 321H, Rst37 ...