... ,JIS,BS satandard Company : Shandong Donghai Steel Pipe Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ,API 5L,ASTM A53, ASTM ... G3455,JIS G3456,JIS G2461,DIN 1629,DIN 1630,DIN2440, DIN2448,DIN 17175,GB/T8162-2008,EN10204,EN10216-1,EN10216-2 ... G3455,JIS G3456,JIS G2461,DIN 1629,DIN 1630,DIN2440, DIN2448,DIN 17175,GB/T8162-2008,EN10204,EN10216-1,EN10216-2 ...