Pressure Systems Safety Regulations 2000
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The Pressure Systems Safety Regulations 2000 (PSSR) require that pressure systems used at work are properly designed, manufactured, maintained and periodically examined by a competent person. The regulations apply to any system containing a relevant fluid at a pressure greater than atmospheric, where a failure could present a danger to persons.
A central requirement of PSSR is the Written Scheme of Examination (WSE). This document, prepared or certified by a competent person, identifies every protective device and every pressure vessel and pipework system that requires examination. It specifies the nature and frequency of each examination, the preparation required (such as draining or cooling) and any special measures needed.
The duty holder — the employer or person in control of the system — must ensure that the Written Scheme exists before the system is operated, and that examinations are carried out in accordance with the scheme.
PSSR applies across a wide range of sectors. If your premises has any pressure equipment above the relevant threshold — including boilers, compressed air systems or steam plant — you are likely to require a Written Scheme and periodic examinations.
Unlike LOLER, PSSR does not prescribe fixed maximum intervals. The competent person determines the appropriate interval for each item as part of the Written Scheme, based on the equipment type, age, condition and operating environment.
Pressure system failures can be catastrophic. A boiler explosion or pressure vessel rupture releases enormous stored energy — equivalent to a significant explosion. PSSR compliance is not a formality; it is a life-safety requirement. The HSE treats pressure system failures as high-priority investigations and prosecutes non-compliance vigorously.
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