1.din2448 seamless steel tube 2.material:Astm a 53/106/ API 5LA/B,ST37, ... range petroleum, construction ,shipbuilding,smelting, aviation, power, foodstuff, papermaking, chemical, medical equipment, boiler heat, exchanger, gas metallurgy, etc.Min Order Quantity1 ... pipe,carbon steel pipe,butt welded pipe din2448 seamless steel tube