Walk into any truck workshop and look past the lifts and the brake tester: in the corner, bolted down and humming, is a pressure vessel. The compressed air receiver feeding the impact guns, the tyre inflators and the air jacks is a pressure system in law - and HSE’s brief guide opens with the reason the law bothers: if pressure equipment fails in use, it can seriously injure or kill people nearby and cause serious damage to property. An air receiver that lets go in a workshop is a bomb with a drain valve, and the Pressure Systems Safety Regulations 2000 exist because receivers have killed.
HSE’s guidance condenses the duty into two sentences that every workshop manager should be able to recite: you need to ensure that a suitable written scheme of examination is in place before the system is operated - and you need to ensure that the pressure system is actually examined in accordance with that scheme.
Both halves matter, and they fail differently. The first failure is the missing scheme: the receiver installed years ago, plumbed in, and never documented. “Before the system is operated” is unforgiving phrasing - the scheme is a precondition of use, not a retrospective paperwork exercise. The second failure is the quiet one: the scheme exists in a drawer, the examination dates pass, and nobody notices because the receiver keeps working. A pressure system does not complain as it corrodes. The examination regime is the only thing listening to it.
The written scheme of examination is the document that defines what gets examined, on which parts, at what intervals, and by what method. HSE’s pressure systems leaflet sits alongside a companion leaflet dedicated to written schemes - Written schemes of examination: Pressure Systems Safety Regulations 2000 - which tells you how seriously the regulator takes the document itself. This is not a certificate bought once and framed; it is the living schedule that drives periodic examination of the vessel, its protective devices, and its pipework.
For a workshop, the system typically includes the receiver itself, the safety valve, the pressure gauge, and the associated pipework. The examination is carried out by a competent person - in practice, usually an inspector from the engineering inspection company that also handles the lift examinations, which is why the smart workshops put the receiver on the same inspection contract and calendar.
The pattern is predictable because the receiver is invisible when it works. Lifts get used every hour and get examined because everyone can see the failure mode. Brake testers are revenue equipment. The air receiver is infrastructure - silent, bolted down, older than the manager - and it only enters the conversation when the compressor trips or the insurance surveyor visits. Fleets that inherit workshops through acquisition routinely inherit receivers with no paperwork at all: the scheme was never drawn up, or it stayed with the previous owner’s files.
There is also a growth trap: the workshop that upgraded the compressor, added a second receiver, or extended the air lines has modified the pressure system, and the written scheme must reflect the system as it actually is. A scheme written for the old receiver does not cover the new one, however similar they look.
Fixing this takes one phone call and one folder. The phone call is to the engineering inspection provider: survey the compressed air system, draw up or update the written scheme of examination, and put the examinations on contract so they recur without memory. The folder is the paper trail: the scheme, the examination reports, any repairs or modifications, kept where the next manager and the next insurer can find them.
Then the daily habits that the written scheme assumes: drain the receiver condensate, watch the gauge behaviour, treat any hissing, weeping weld or weeping valve as a stop-and-report, and never let anyone weld or grind on a vessel. None of that replaces examination - it is what keeps the receiver honest between examinations.
Pressure systems sit in the same regulatory family as the other workshop examination regimes - the lifting equipment thorough examinations, the work equipment duties - and HSE’s framing is consistent across all of them: the equipment that can kill quietly gets a written, periodic, competent-person regime. The air receiver is usually the last one a transport business discovers it owns. The time to find it is this week, with the insurance surveyor’s checklist in hand, not after the bang.