An air receiver is the pressure vessel that stores compressed air from your compressor. Like other pressure equipment, whether it needs periodic in-service inspection isn't automatic — it depends on its hazard level under AS 4343, which is worked out from its pressure, volume and contents.
The quick test: pressure × volume
A common rule of thumb for air receivers is the pressure–volume figure (pV). Larger receivers — broadly those above the pV threshold used by the regulator — fall into the band that needs periodic external and internal inspection by a competent person to AS/NZS 3788. Smaller receivers below that threshold generally need routine operating surveillance rather than a full statutory inspection regime.
The exact figures and hazard level depend on the specific vessel, so the reliable way to know is to check the nameplate data against the current standard — not to guess from the size of the tank.
Typical inspection intervals for an in-scope air receiver
- External inspection — commonly around every 2 years
- Internal inspection — commonly around every 4 years
- Any pressure relief valve — regular external checks, with periodic set-pressure testing through accredited partners
How to find out where you stand — free
If you're not sure whether your air receiver is in scope, the fastest answer is a free AS 4343 assessment: send a photo of the equipment and its nameplate, and we'll tell you plainly whether it needs inspection and roughly when it would be due. Half the time the answer is that you're fine as you are — which is also worth knowing.
Not sure where your equipment stands?
Send a photo of the equipment and its nameplate and we'll tell you plainly under AS 4343 — free, no obligation.
Common questions
- Does a small workshop air compressor need inspecting?
- It depends on the receiver's hazard level under AS 4343. Many small receivers sit below the threshold that requires full in-service inspection and instead need routine operating surveillance. The nameplate figures decide it — a free assessment will confirm which side of the line yours is on.
- Who can inspect an air receiver?
- In-service inspection must be carried out by a competent person to AS/NZS 3788 — in practice, a certified in-service pressure-equipment inspector such as an AICIP-certified inspector.
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This guide is general information, not legal or engineering advice. Inspection requirements depend on your specific equipment and jurisdiction; confirm against the current edition of the applicable standard. Speqo supplements but does not replace your own duty-holder obligations.