hot rolled seamless pipe EN10297,EN10210,ASTM A519,JIS G3445,API 5L GR.B, ASTM A106GR.B,ASTM A53GR.B,DIN17175, DIN2391/2448 hot ... ,EN, DIN, ASME, BS, GB,JISGradeAPI 5L GR.B, ASTM A106GR.B,ASTM A53GR.B JIS G3445 STKM11A STKM12A STKM13A STKM14A EN10297 ... S235JRH S275J0H S275J2H S255J2H DIN 1629, DIN17175, DIN2391, DIN2448, ASTM/ASME53, ASTM A519 1010 1012 1025 1045 4130 MT X1020 MT 1020CertificateAPI ...