... ) Standards of Steel Pipe: ASTM A106 , ASTM 53 , API 5L and etc.5) Surface of Steel Pipe oiled or black ... (hot finished steel tube )StandardDIN17175,DIN1626,DIN2448,DIN17120,API 5L, API 5CT, ASTM A106, ASTM A53,ASTM A179,ASTM ... transport; shipbuilding, construction, steel structure; city piping system etc.Min Order QuantityAccording to customer's requirementProductivity4000 Tons /month seamless steel ...