A written scheme of examination for the MGPS is required by the Regulations. The scheme defines the type, frequency and extent of examination of specific parts of the medical gas system, particularly those classified as pressure vessels, for which a two-yearly internal visual inspection is usually required.

A competent person is required to prepare this written scheme. The competent person may be an organisation, and will usually be a nominated person from the insurance company that carries out periodic pressure vessel inspections. (This is not the Competent Person (MGPS) defined under the permit-to-work system in this Health Technical Memorandum.)

Pressure safety valve replacement scheme (five-yearly). This advice arises from the inherent lack of corrosion of these components when used with the very dry gases in the MGPS, and is an alternative to pressure testing, which requires MGPS shut-downs and could be dangerous if line pressures were to be increased during patient use. Details of the procedure should appear in the written scheme.

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