Boiler Accidents, Reporting, and Attendant Certification
The law asks two things of the people around a boiler: that it is in the charge of a certified attendant, and that any accident is reported promptly. Both exist because most boiler accidents trace back to how a boiler was run.
You'll learn
- Know what counts as an accident under the Act
- Know the reporting duty and its timing
- Understand First and Second Class attendant certificates
- Know what else an accident does to the boiler’s certificate
Before this: Registration, Certificates and Inspection
What counts as an accident
Under section 2(a) of the Boilers Act, 2025 an accident is an explosion of a boiler or steam pipe, or any damage to a boiler or steam pipe that is liable to weaken its strength, or an uncontrolled release of steam or water liable to cause injury or damage. It is a wider idea than “explosion”: a failed tube that releases steam is an accident.
The owner or the person in charge must report an accident in writing to the Inspector within 24 hours (s. 23). The boiler’s certificate ceases when an accident occurs (s. 13(1)(b)), so the boiler cannot simply be repaired and restarted.
Boiler attendant certificates
Section 11(1)(e) makes it an offence to use a boiler that is not in the charge of a person holding the certificate the rules require. The Boiler Attendants’ Rules, 2025, notified on 29 September 2025, set two classes by heating surface area:
| Boiler | Certificate |
|---|---|
| Single boiler up to 200 m², or up to three connected boilers totalling 200 m² | Second Class Boiler Attendant |
| Above that | First Class Boiler Attendant |
Certificates are valid nationally. Heating surface is fixed by the boiler’s design, not by its steam output.
Applied by GyanTosh’s compliance code: at 150 m², “Second Class”; at 350 m², “First Class”.
Why heating surface, and after an accident
The classes are defined by heating surface in square meters, not by steam output in kg/h, because heating surface is a fixed property of the boiler’s design. The same steam output can come from quite different heating surfaces, so a certificate class cannot be read off a TPH rating. Ask the manufacturer for the heating surface on the boiler’s documents.
- After an accident: make the boiler and area safe, preserve the evidence, report in writing within 24 hours, and do not repair or restart until the Inspector has dealt with it and a new certificate is in place.
- Most accidents have causes in operation and maintenance: low water, defeated safety devices, poor water treatment, unauthorized repairs. Training and attendance matter as much as the hardware.
Key takeaways
- An accident includes any damage weakening a boiler or steam pipe, or an uncontrolled release of steam or water.
- Report in writing to the Inspector within 24 hours; the certificate ceases on an accident.
- Second Class: up to 200 m² (single, or up to three connected boilers in total); First Class above.
- Certificate class follows heating surface, not steam output.