Commodites: oil cracking pipe Standard:JIS,DIN ,ASTM ,API ,EN.ECT Commodites: oil cracking pipe Standard:ASTM A53 ,API Spec 5L ,ASTM A179,ASTM A335,DINMaterial: 20#,45#,16Mn,12CrMo .AND SO ONOD:6mm-720mmW.t: 1MM-60MMApplication: Used in the fertilizer,boiler ,power station ,ship millitary ,chemical industry ,food industry and so on