Fifteen years from the date of the first hydrostatic pressure test all composite cylinders
shall be returned to the manufacturer or competent organisation(s) authorised to test
composite cylinders on behalf of the manufacturer, for re-assessment. The manufacturer,
in conjunction with the competent organisation(s) where appropriate, and the approved
Inspection Body shall establish suitability for further service. Where this is found to be
appropriate, the Health and Safety Executive shall be advised.

Thirty years from the date of the first hydrostatic pressure test any composite cylinders
still in-service shall be returned to the manufacturer or competent organisation(s)
authorised to test composite cylinders on behalf of the manufacturer, for re-assessment.
Thereafter they may continue in service to the end of their design life only with written
consent of the manufacturer and the approved Inspection Body.

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