... B2313, MSS SP-25, MSS SP-75, BS1387Raw materialCarbon steel , stainless steel, alloy steelCarbon Steel 10# 20# Q235B ASTM A234 ASTM A105 ASTM A403Stainless ... ,Flange ,Bend,Stubtube,Weldole,NippleUnion,ClampInspection Factory in-house or Third Party inpectionSamples: Elbows, 316L Stainless Steel ,LR,90 DEG,18",SCH 40