... EN10297,EN10210,ASTM A519,JIS G3445,API 5L GR.B, ASTM A106GR.B,ASTM A53GR.B,DIN17175, DIN2391/2448 cold drawn and mecanical seamless ... -50mmStandardAPI5L ,EN, DIN, ASME, BS, GB,JISGradeAPI 5L GR.B, ASTM A106GR.B,ASTM A53GR.B JIS G3445 STKM11A STKM12A STKM13A STKM14A EN10297 E275K2 ...