ASTM A53 Seamless steel pipe(factory) OD:10-820mm WT:2-60mm Material:ASTM A53 GrA , ... ,API 5L,ST52 Length:3-12mm ASTM A53 Seamless steel pipe StandardASTM A53/A106 /A179,GB/T8162/8163,EN10255,ST52,API ... , competitive price, better is our services. ASTM A53 Seamless steel pipe(factory)