BS 5M 23:1987

This standard BS 5M 23:1987 Specification for an identification scheme for pipelines is classified in these ICS categories:

• 49.080 Aerospace fluid systems and components

This International Standard lays down the requirements for a scheme to indicate, by appropriate marking, the functions or contents of rigid pipe assemblies in aircraft and spacecraft systems, but excluding those in aero-engines with the exception of those which connect directly to the airframe systems at their break points.

These requirements may also be applied to hose assemblies, if desired.

The purpose of the scheme is to provide the minimum identification necessary for normal maintenance purposes.

NOTE – Markers used for the purpose of applying this identification scheme should not adversely affect the chemical or mechanical properties of the pipes or conduits.

Includes a modified scope and field of application. A symbol for filtered air has been added, and details of the supplementary marker have been expanded.