High quality seamless steel pipe for oil field 1. Factory sell 2. OD: 10- ... Steel Pipe Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ,API 5L,ASTM A53 ... than 1000 tonsSurface treatmentBlack paint, yellow/transparent an-ti rust oil, galvanizedUsagePetroleum, chemical, power, gas, industrial, ship building ... licens, High quality seamless steel pipe for oil field