... petrochemical industry Huahai sealing--Specialized gasket supplier API BX & RX gasketstandardised production used in petrochemical industry Huahai sealing--Specialized gasket ... supplier 1.type: R,BX,RX,IX 2 shape: octagonal, oval, lens 3 .size: ... F5,F51,317L,904L 7.hardness:below 160HB Max Temperature10#/08#/ carbon steel/D: 450soft iron 450F5 540304 600 316 ...