API 5L seamless steel round pipe Thickness:0.2-10mm, Length:0-12000mm ... 20-620mm Standard: GB/AISI/ASTM API 5Lseamless steel round pipe1.Grade: ASTMA106,10#,20#,Q235B,Q195,45#2. ... -1998 DIN 1629-1984 3.Applicant seamless steel tube for high pressure boilers Grade:20G,20MnG,25MnG ... ASTM SA179,SA192,BS30595. ApplicantHigh pressure seamless steel tube for chemical Fertilizer EguipmentsGrade:10,20G,Q345,Q390, ...