Mandatory compressed air receiver inspection: frequency and requirements

A regulated compressed air receiver under the Regulation respecting pressure installations (B-1.1, r. 6.1) must undergo periodic external inspection, even if it is exempt from an installation permit or welding. The base frequency is set by Table 1 under section 78, but three situations, relocation, a change in use, and a prolonged shutdown, trigger an inspection requirement. This article summarizes how often to inspect, what pushes a receiver off the normal schedule, and who is authorized to carry out the inspection at your plant.

Disclaimer. This article is provided for informational purposes only and does not constitute official legal or technical advice. Any decision related to the inspection, maintenance, or operation of a compressed air receiver must be validated by a qualified professional and comply with the requirements of the competent authorities. Refer to the regulation in force and to the RBQ for your official legal obligations.

Periodic inspection frequency (section 78)

Section 78 refers to a frequency table that applies to each category of pressure equipment. For a compressed air receiver, the applicable line is:

Equipment type	External inspection	Internal inspection
Compressed air receiver	Every 4 years	Not required

The table also covers other equipment categories (boilers, autoclaves, steam generators, etc.) at different frequencies, only the line applicable to compressed air receivers is reproduced here. A receiver holding a non-corrosive fluid follows the exact same frequency (4 years, external only).

Staying compliant, step by step

Confirm whether your receiver is regulated : check using the RBQ flowchart and the complete guide on CRN and permits.
Track the 4-year deadline : starting from commissioning or the last external inspection.
Watch for the 3 out-of-cycle triggers : relocation (section 79), a change in operating conditions, or a shutdown of more than one year (section 81).
Hire a recognized person : an inspector or body recognized by the RBQ; see the RBQ resources list.
Keep the inspection report : your proof of compliance if it’s ever requested.

Who can inspect a receiver?

Only a recognized person may inspect pressure equipment (section 71). A recognized person is someone who holds the qualifications to inspect pressure equipment (over 15 PSIG) and who is recognized by the RBQ. To hire a recognized person : an inspector or a body recognized by the RBQ, see the RBQ resources list.

Onyx M3 recommends contacting your insurer first. Some insurers hold the permits and certifications needed to carry out your periodic inspections at a lower cost.

Concrete example

A compressed air receiver commissioned in June 2022, with no prolonged shutdown or change in use:

Next external inspection due: June 2026, 4 years after commissioning (normal cycle under section 78).
If it is relocated to another building in 2025, section 79 requires both an internal and external inspection before it is put back into service at the new location, the 4-year clock then restarts from that inspection.
If the plant shuts down for more than 12 months and the receiver sits idle, section 81 requires an inspection and RBQ authorization before any restart, even if the 4 years have not elapsed. The prescribed period is 1 year.

Why it’s worth tracking ahead of the deadline. A receiver that is overdue for inspection can be taken out of service by an inspector, delay production, or complicate an insurance claim after an incident. During an assessment or compressed air audit conducted by Onyx M3, we review the general condition of your installations and flag receivers approaching their inspection deadline. The recognized person remains the only one authorized to carry out the regulatory inspection itself.

References

RBQ, Regulation respecting pressure installations (B-1.1, r. 6.1), sections 78 to 81 and Table 1, view the regulation.
Onyx M3, A complete guide to compressed air receivers in Québec : applicability, CRN and installation permits.

Frequently asked questions

How often must a compressed air receiver be inspected in Québec?

Table 1 under section 78 of the Regulation respecting pressure installations (B-1.1, r. 6.1) prescribes an external inspection every 4 years for a regulated compressed air receiver. No internal inspection is required under this normal cycle.

Can a compressed air receiver ever require an internal inspection?

Yes, in two specific cases: if an external inspection reveals a safety risk (section 80, the visual internal inspection may then be replaced by a non-destructive test such as ultrasound or radiography), or when the receiver changes location (section 79), unless it is mobile pressure equipment.

What triggers an inspection outside the normal 4-year cycle?

Three situations: relocating the receiver (section 79, requiring both internal and external inspection, except for mobile equipment); a change in operating conditions; or a shutdown of more than one year (section 81), the latter two also require authorization from the Régie du bâtiment du Québec before restarting.

Who is allowed to carry out a regulatory inspection of a compressed air receiver?

A "recognized person" as defined in section 1 of the regulation: a person or body recognized by the RBQ, typically an accredited insurance or inspection company, to assess compliance. The RBQ publishes the official list.

What should be done with the inspection report afterward?

Keep it: it is your proof of compliance for the RBQ and your insurers. It's recommended to file it with your receiver's other records (nameplate, CRN, installation compliance statement).