... in 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: R11 ... 304,Gr.630(A264-17.4Ph) F5,F51,317L,904L 7.hardness:below 160HB Max Temperature10#/08#/ carbon steel/D: ...