M&M Compliance Training
For most of the summer, steam boiler plant leads a quiet life. Space heating is off, hot water demand is down, and in many boiler houses one boiler carries the load while its neighbour sits in standby or lay-up. Then the temperature drops — and within a few weeks the same plant is expected to run at or near full output, around the clock, for months.
That transition is where problems surface. The weaknesses that develop quietly over a low-load summer — a lapsed examination, a corroding standby boiler, an operator whose refresher quietly expired — all get found out by winter demand, usually at the least convenient moment. This article looks at why the colder months raise the stakes for pressure systems, what the Pressure Systems Safety Regulations 2000 (PSSR) and BG01 guidance expect, and the practical checks estates and engineering teams should be making now, while there is still time to act on what they find.
A pressure system failure is unforgiving at any time of year: stored energy in a steam boiler is released instantly and catastrophically if containment fails. But autumn and winter concentrate the risk for three practical reasons:
The weaknesses that develop quietly over a low-load summer are found out by winter demand — usually at the least convenient moment.
The Pressure Systems Safety Regulations 2000 apply across Great Britain and are supported by the HSE’s Approved Code of Practice L122, Safety of pressure systems. Their purpose is blunt: to prevent serious injury from the release of stored energy when a pressure system or one of its parts fails.
The centrepiece is the written scheme of examination. Before a qualifying pressure system is operated, a suitable written scheme of examination must be in place, and the required examination under that scheme must have been completed. The scheme itself is drawn up or certified by a competent person — typically an engineer surveyor from an inspection body or insurer — and systems containing steam are in scope at any pressure. The scheme identifies every protective device and pressure vessel to be examined, the nature and maximum interval of examinations — commonly around 14 months for steam boilers, as the scheme specifies — and the preparation each examination requires. The user must then have the examinations carried out on time, act on the results, operate within safe limits, and maintain the system properly.
Alongside the regulations sits BG01: Guidance on the Safe Operation of Boilers, produced jointly by the Combustion Engineering Association (CEA), the Safety Assessment Federation (SAFed) and the HSE, together with the HSE’s INDG436 guidance on managing industrial steam and hot water boilers. BG01 is where the people side lives: supervision and attendance arrangements, alarm and limiter testing regimes, and the expectation that operators and managers are trained to a recognised standard.
Competent person examinations that lapsed quietly over the summer; standby boilers laid up without a defined wet or dry storage regime; safety valve and low-water-level cut-out tests logged sporadically or not at all; water treatment and blowdown records that drifted once the heating went off; BOAS refreshers expired; and out-of-hours cover that relies on “phone whoever answers” rather than a documented arrangement.
Confirm the written scheme is current, certified by your competent person, and covers every item of pressure plant on site — including standby boilers, hired-in plant, air receivers and steam-using equipment added since the scheme was last reviewed.
2. Competent person examinations
Check every examination is in date and that anything due over the winter is booked now. An examination that lapses in December means either running plant unlawfully or losing it at peak demand — neither is a plan.
3. Return-to-service checks after lay-up
Before a laid-up or standby boiler rejoins service, verify its storage regime was followed and test safety valves, water level controls, low-water cut-outs, limiters and alarms — with the results recorded, not just performed.
4. Feedwater and Water Treatment
Re-establish the full water treatment regime before load rises: feedwater quality, TDS control, blowdown rates and chemical dosing. Poor water treatment is a slow-motion boiler failure.
5. Operator competence
Audit training records against BG01 expectations: BOAS certification for operators (CertIBO) and managers (DipBOM) is valid for five years, so check refresher dates now — courses book up ahead of winter.
6. Supervision and cover arrangements
Match your attendance and supervision regime to how the plant will actually run in winter — including nights, weekends and holiday cover — and make deputising arrangements formal and documented.
7. Logbooks and records
Reinstate the daily and weekly check discipline before demand forces the pace: a complete boiler house log is both your early-warning system and your evidence that the safe system of work is operating.
An examination that lapses in December means either running plant unlawfully or losing it at peak demand — neither is a plan.
BG01 is clear that safe boiler operation rests on trained, assessed people: it points operators and managers to the Boiler Operation Accreditation Scheme (BOAS), run by the CEA and recognised by industry, insurers and the HSE. Certification requires documented practical experience as well as formal training, and must be refreshed every five years. More broadly, the law expects anyone operating, maintaining or managing pressure plant to be competent — a combination of training, skills, experience and knowledge that can be evidenced, not asserted.
In healthcare estates, that expectation sits inside the familiar safe-systems-of-work structure: many organisations appoint Authorised Persons for pressure systems and an independent Authorising Engineer to audit the arrangements, mirroring the other engineering disciplines. On investigation after an incident, the first questions are about people, not pipework: who was appointed, on what basis, with what training, and when was it last renewed? A structured competence management system — one current record mapping each role to its appointment, training evidence and refresher dates — is what turns that conversation into a formality. Our guide to How to prepare for Your Authorising Engineer’s Annual Audit | M&M Compliance Training explains what good looks like.
M&M Compliance Training Services works on both sides of the pressure systems framework. We deliver steam boiler safety and competence training aligned to BG01 and PSSR 2000 requirements, support Authorised Person arrangements for pressure systems, provide Authorising Engineer (AE) Services and help estates teams build the competence management systems that keep appointments, training records and audit evidence current all year round — not just when winter exposes the gaps.
Talk to us about steam boiler competence training, pressure systems AP arrangements or AE appointments - while there is still time before the heating season.
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