... /A53 GRB, ST3 DIN 1629 st45 seamless pipe for water Marking :P/O No,SPEC. ... -5%/+5%; Product Namebig inch seamless steel pipe weightStandardAPI5L,ASTM, ANSI, GB,DIN,BSMaterialAPI 5L ... 820mmWall thickness2~60mmLength5-12m,or according to the customers’ requirementsTechnicsCold draw and hot rolledSurfaceBlack painting ... pallet bundle packing, paint on the pipe, plastic covers at the ends or as per customer ...