... High quality seamless steel pipe for oil field 1. Factory sell 2. OD: 10-630mm 3. ASTM,DIN,JIS,BS satandard Company : Shandong Donghai Steel Pipe ... Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ,API 5L,ASTM ... 5CT-0816,API 5L-0602,High Pressure Equipment licens, High quality seamless steel pipe for oil field