The Pressure Systems Safety Regulations 2000, requires a written scheme of examination for pressure systems and examination by a competent person.
PSSR applies to pressure systems containing a relevant fluid above 0.5 bar, such as steam boilers, air receivers, autoclaves and compressors, together with their pipework and protective devices. Before the system is used it must have a written scheme of examination drawn up or certified by a competent person.
The system is then examined by a competent person in line with that scheme, before deterioration could cause danger, and a report of examination issued. Where repairs are needed to prevent imminent danger, the system must not be used until they are done.