Specification :

BX Ring Joint Gasket Description
The type BX energized ring type joints, manufactured in accordance with API 6A, are designed for use on pressurized systems up to 20, 000 psi.
When correctly fitted, the type BX gasket allows virtual face to face contact of the flange faces which means that the gasket in fully trapped on both the inner and outer diameters.
All BX gasket incorporate a pressure balance hole to ensure equalization of pressure which may be trapped in the grooves.

BX Ring Joint Gasket Tolerances ( Inches)
> " A" Width of ring: + 0.008-0.000
> " D" Height of ring: + / -0.002
> " OD" Outer dimension of ring: + 0.000, -0.005
> " 23o" Angle: + / - 1/ 2o

Standard
Standard style BX ring type joints are manufactured in accordance with both API 6A and ASME B16.20 size and ratings. Available in both oval and octagonal configurations, both types are interchangeable on the modern octagonal type grooved flanges

As with all metal ring type joints including style BX, it is recommended to replace the ring when flange connection is broken.