... ,N80,P110 Length:R1 R2.R3 API 5CT oil pipe Used in the oil casing, natural gas .fertilizer,boiler ,power station ,ship ... :R1 R2.R3Type of Threading: STC,BTC.LTCTianjin JiangHaiLong Steel Co.,Ltd, is a large universal company of professianl production and selling ... ,high pressure,medium and low pressure ,stainless steel pipes and oil pipe with different material standards for more than 15 professsional ...