规格(mm)壁厚(mm)材质标准48.32.5-7.0 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
ASTM GRA,GRB API5L,API5CT JIS, DIN, GB BS60.33.0-7.076.13.0-8.088.93.0-10.01023.0-10.01083.0-11.0114.33.0-12.01213.0-12.01273.0-12.01334.0-12.0139.73.0-12.01523.0-12.01593.0-13.01653.0-13.0168.33.5-13.0177.83.5-13.0193.44.0-14.02033.0-14.02193.5-14.0244.55.5-14.02735.5-14.0