... BS satandard Company : Shandong Donghai Steel Pipe Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ,API 5L,ASTM ... ,K55,N80,P110,T1,T5,T11,T22,T23,and so onThird party inspectionBV, SGS, Lloyds TUVPackageIn bundle ... for an order less than 1000 tonsSurface treatmentBlack paint, yellow/transparent an-ti rust oil, galvanizedUsagePetroleum, chemical, power, gas, ...