... -76mm; (1)Standard:ASTM A53 BS 1387 GB/T3091 (2)Material:20#,Q195,Q235,Q345,St 52,St 37(3)OD ... requirements. Technique :Cold rolled, Inspection: With Chemical Composition and Mechanical Properties Analysis; Hydrostatic Test, Dimensional and Visual Inspection, Also With Nondestructive ... industry, Food Processing, Pharmaceutical, Petrochemical, Chemical, Machine Building, Automobile Seamless Steel Pipe