... ,GB/T8162,GB/T8163,API5L2.Size OD: 168-219mm WT: 6-22mm Length: 2-12m3.Surface treatment: black painted, varnished, galvanized ... : plain end, bevelled end with plastic caps protected.5.Applications: general service, fluid, gas transport, structure, machining, oil, gas ... Export Markets:Eastern EuropeNorth AmericaMid East/AfricaCentral/South AmericaAsiaWestern EuropeAustralasia API 5L GRB ERW Steel Pipe