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BX metal ring pad is made of metal material by forging and heat treatment and machining into cross section shape is the entity of BX type metal gasket, have radial since the tight sealing effect, is a kind of special metal octagonal ring gasket, its action principle is cushion for leaning on and flange type ladder groove (mainly the lateral) out of contact, and through the pressure sealing function to form.
The BX ring gasket differs from the standard oval or octagonal shape since it is square in cross section and tapers in each corner. All BX ring type joints incorporate a pressure passage hole to allow for pressure equalization each side of the sealing faces. On assembly, metal to metal contact of the flange faces is achieved. They can only be used in API 6BX flanges. BX is used at pressures up to 20,000 psi.