High quality seamless steel pipe for oil field 1. Factory sell 2. ... Company : Shandong Donghai Steel Pipe Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ... 1000 tonsSurface treatmentBlack paint, yellow/transparent an-ti rust oil, galvanizedUsagePetroleum, chemical, power, gas, industrial, ship building ... , High quality seamless steel pipe for oil field