... WPB ELBOW :we are manufacturer for carbon steel pipe and fittings,like 45deg,90deg,180deg,L/R OR ... ,equal or reducing tee, CON reducer, ECC reducer, pipe cap,flange. CON AND ECC REDUCER: CARBON STEEL,STAINLESS ... A283,A105,A53,A106,API5L STANDARD: ASTM/ANSI,DIN,ISO,GB,JIS,BS OTHERS: 1. Special design available ... All the production process are made under the ISO 9001:2000 strictly. carbon pipe fitting