... Donghai Steel Pipe Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ,API 5L,ASTM A53, ... and so onThird party inspectionBV, SGS, Lloyds TUVPackageIn bundle with strips, sea-worth packing or according to our discussingPaymentL/ ... Certificate: ISO9001,API 5CT-0816,API 5L-0602,High Pressure Equipment licens, High quality seamless steel pipe for oil field