CRN Registration for Air Receivers and Compressed Air Tanks

Reviewed by Dhruv Barot, P.Eng. · Last updated: March 1, 2026

Air receivers and compressed air storage tanks are among the most ubiquitous pressure vessels in Canadian industry. Any compressed air receiver exceeding pressure and volume thresholds requires CRN registration before installation in Canada.

Why Air Receivers Require CRN

Compressed air stores significant energy. An unregistered air receiver that fails can cause catastrophic injury. Provincial inspectors routinely check for CRN nameplates. Non-compliant air receivers result in immediate stop-use orders.

• Receivers above 15 psig and 1.5 US gallon volume typically require CRN
• ASME VIII-1 is the standard design code for most air receivers
• Nameplate must show CRN, MAWP, design temperature

Standard vs Custom Air Receiver CRN

Standard catalogue air receivers from established manufacturers typically already carry CRNs for major provinces. Custom-fabricated receivers require new CRN registration. Kopfkino handles both: verifying existing CRNs and obtaining new registrations.

Frequently Asked Questions

My small workshop air compressor has a tank, does it need CRN?

Most commercial and industrial air receivers above approximately 1.5 US gallons at operating pressure above 15 psig require CRN. Small portable tanks below threshold may be exempt.

"The single most expensive CRN mistake we see is treating registration as an afterthought. Design for CRN from day one: pick your provinces early, align the calculations with CSA B51 before the drawings are finalized, and most submissions clear review in a single comment round."