scope:

This part of IS0 7005 for a single system of flanges specifies requirements for circular steel flanges in the following PN designations:

It specifies the types of steel flanges and their facings, dimensions, tolerances, threading, bolt sizes, flange face surface finish, marking, testing and inspection.

It does not specify pressure/temperature ratings or materials for steel flanges. However, annex D gives guidance on selected materials and annex E gives guidance on the pressure/ temperature ratings for some flanges made from the materials listed in annex D.

This part of IS0 7005 does not apply to flanges made from bar stock by turning.

Nor does it apply to flanges of types 11,12, 13,14 and 15 made from plate material.

The various gasket types, dimensions, design characteristics and materials used are not within the scope of this part of IS0 7005.

NOTE - Dimensions of gaskets are given in IS0 7483.