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