... up to 48" 2.Material:carbon steel,alloy steel,stainless steel 3.Standard:ASME B 16.5, Carbon Steel forged flanges 1. Specifications: ... ASME, JIS, MSS, API, DIN, BS2. Material: Carbon Steel(ASTM A105, A181, ST 37.2, C22.8, Q235 ... )Stainless SteelASTM F304/304L, 316/316L, 321) Alloy Steel(ASTM F11/22)3. Size: 1/2"~ 200" ... for JIS Flanges. 6. Certification:ISO9001 Carbon Steel forged flanges