... API 5L,API 5CT,API 5CT.5B,GB/T9711.1,GB/T9711.2-99 ect Material :J55,K55,N80 ect Product Name:pipe ... 630mm2,Thickness:5-30mm3,Application:For line pipe in petroleum and natural gas4,Quality:First ... other paintingCommodityOil casing pipe/tubePlace of originTianjin, China(Mainland)StandardAPI 5L,API 5CT,API 5CT.5B,GB ... quality. we can offer many steel pipe with differernt steel grades.your inquiry will ...