... .3--1250mm 3)Thickness:1.8--60mm 4)API5L.ASTM-A53,BS1387-85,JIS-G3444,GB/T3091-2001,etc. CommodityERW steel pipeSpecification21 ... .8-14.27mmMaterialQ195,Q215,Q345,20#,10#,16Mn.etcStandardAPI5L.ASTM-A53,BS1387-85,JIS-G3444,GB/T3091-2001,etc.10#,20#,35 ...