... ,DIN1629 , API 5L Steel Grade GB/T8162 , GB/T8163:10#, 20#, 35#, 45#, 16MN(Q345B) ASTM A53 GR. A , GR. ... Impact Test etc), Exterior Size Inspection, Nondestructive Test (Ultrasonic flaw detector, Eddy. current flaw detector), Hydrostatic Test. Seamless steel pipe: ASTM A 53 ... 2393 seamless steel pipes for structural purpose Material: Rst34-2, Rst37-2, RSt44-2, St52 Size: OD 16mm - OD 426mm OCTG PIPE, ...