1 Standard: GB/T8163 ,ASTM A53,ASTM A106,API5L,DIN1629,JIS G3458,ISO 559 , DIN 17172 2 Material: 10#, 20#, Q295, Q345, 45#, ST4 20# Seamless pipe for liquid use :1 Standard: GB/T8163 ,ASTM A53,ASTM A106,API5L,DIN1629,JIS G3458,ISO 559 , DIN 171722 Material: 10#, 20#, Q295, Q345, 45#, ST44/52,ASTM A53,/106GRB3 Dimensions:32-920mm, Thickness: 4-35mm4 Applications :widely used for water, oil and gas ...