OD: 12 inch to 48 inch WT:6mm to 30mm standard:GB,ASTM,JIS,DIN,API5L,API5CT steel grade:ASTM A106,A53,X42,X52,X60,PSL1 SIZETHICKNESS(mm)MATERIALSTANDARD12”6-15 ASTM A53,A106,A283-D,A210-C,A333 JISG3456,G3454,G3455; ST37,ST42,ST45-8,ST52; GB Q235,20#,10#,45#,16Mn,Q345 API PSL1,PSL2,X52,J55,K55,N80 API5L,API5CT JIS, DIN, GB14”8-1516”8-1518”10-1620”10-1622”10-1824”10-1826”10-1828”10-1930”10-2032”10- ...