Pressure

PSSR and the written scheme of examination explained

4 min read · Updated 11 June 2026

The Pressure Systems Safety Regulations 2000 (PSSR) require that pressure systems have a written scheme of examination, and are examined by a competent person in line with that scheme before deterioration could cause danger.

What is a written scheme of examination?

A document that specifies which parts of a pressure system are examined, the nature and frequency of examination, and any measures needed to prepare the system for safe examination. It must be drawn up or certified by a competent person before the system is operated.

Which systems are covered?

Systems containing a relevant fluid above 0.5 bar above atmospheric pressure, such as steam boilers, air receivers, autoclaves, compressors and the associated pipework and protective devices.

Duty holder responsibilities

  • Establish the safe operating limits of the system
  • Maintain the system in good repair
  • Ensure examination in line with the written scheme
  • Act on any report of imminent danger before further use

Managing PSSR on CertFlow

CertFlow stores each written scheme against its system, schedules examinations to the right competent person at the scheme intervals, and keeps every report of examination filed and searchable.

References

Sources & official guidance

Links to primary UK legislation and official regulator guidance. CertFlow is independent and not affiliated with these bodies.

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