... ASTM A234 WPB ELBOW :we are manufacturer for carbon steel pipe and fittings,like 45deg,90deg,180deg,L/R OR ... tee, CON reducer, ECC reducer, pipe cap,flange. CON AND ECC REDUCER: CARBON STEEL,STAINLESS,STELL,ALLOY STEEL NOMINAL DIAMETERBIG ... 3-142018-1420 MATERIAL: A234WPB,A283,A105,A53,A106,API5L STANDARD: ASTM/ANSI,DIN,ISO,GB,JIS,BS OTHERS: ... are made under the ISO 9001:2000 strictly. carbon pipe fitting