Boiler Registration, Certificates, Inspection and Hydraulic Test
A boiler may only be used once it is registered and holds a valid certificate, and only up to the pressure that certificate allows. Certificates run for a limited period and lapse early in several situations. Inspection and the hydraulic test are how the boiler earns each new certificate.
You'll learn
- List the owner’s obligations under the Act
- Know when a certificate ceases
- Understand the renewal timeline
- Prepare for an inspection and hydraulic test
Before this: Boilers Act 2025 and IBR
What the owner must do
- The boiler must be registered with the Inspector before it is used, and the register number permanently marked on it. (s. 11(1)(a), s. 12)
- You must hold the certificate or provisional order authorizing use, and be able to produce it. (s. 11(1)(c), s. 20)
- The boiler must never be operated above the maximum pressure recorded on that certificate. (s. 11(1)(d))
- Where the rules require it, the boiler must be in the charge of a person holding a certificate of proficiency or competency. (s. 11(1)(e))
- Moving a boiler from one State to another must be reported before it is used again. (s. 11(1)(b))
- Any accident — an explosion, or an uncontrolled release of steam or water liable to cause injury or damage — must be reported. (s. 2(a), s. 23)
When a certificate stops being valid
Certificates are granted for up to twelve months (s. 12(6)). A certificate ceases to be in force when:
- the period it was granted for expires (s. 13(1)(a))
- an accident occurs to the boiler (s. 13(1)(b))
- the boiler is moved — except a vertical boiler under 20 m² of heating surface, or a portable or vehicular boiler (s. 13(1)(c))
- a structural alteration, addition or renewal is made to the boiler (s. 13(1)(d))
- the Chief Inspector or Inspector prohibits its use as being in a dangerous condition (s. 13(1)(f))
Renewal runs through a competent person, who must inspect within 15 days of the owner’s application and inform the owner and the Chief Inspector of any defect within 48 hours of the inspection; the Chief Inspector then orders renewal or refuses it (s. 13). If the application was made before the certificate expired, the boiler may continue in use at the certified pressure while renewal is decided (s. 15); a late application forfeits that.
Preparing for inspection and the hydraulic test
- Apply for renewal well before expiry, with the boiler’s history and log available.
- Shut down, cool, drain and open the boiler: manholes, handholes and inspection doors.
- Clean the water side and gas side so the surfaces can actually be examined: scale, sludge and soot hide cracks and thinning.
- Isolate and lock out steam, feed, blowdown and fuel connections; confirm no common line can backfeed.
- Make mountings and fittings available for examination — safety valves, gauges, valves, fusible plugs where fitted.
- For the hydraulic test, the boiler is filled with water, vented of air, and pressurized above its working pressure to the value the regulations require, then held and examined for leaks and distortion.
Water is used rather than steam or air because it stores little energy under pressure: if something does fail, it leaks rather than bursts. The test proves the pressure parts; the internal inspection finds the corrosion, cracking and thinning that a test alone might not reveal.
Key takeaways
- Register before use, hold a valid certificate, never exceed its pressure, use certified attendants.
- Certificates run up to twelve months and lapse on expiry, accident, moving, alteration or prohibition.
- Renew through a competent person; apply before expiry to keep running while renewal is decided.
- Prepare for inspection: shut, cool, drain, open, clean, isolate; the hydraulic test uses water for safety.