BS 4865-4: 1989 : Dimension of gaskets for flanges to BS 4504 — Part 4. Specification for corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges
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This Part of BS 4865 specifies the dimensions and marking of IBC (inside bolt circle) corrugated, flat or grooved metallic and filled metallic gaskets for use in conjunction with steel flanges, complying with BS 4504 : Section 3.1 for nominal sizes pressure PN10, PN 16, PN 25 and PN 40 and for normal sizes up to and including DN 900.
BS 4865-4: 1989 : Dimension of gaskets for flanges to BS 4504 — Part 4. Specification for corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges