CRN Registration for Air Receivers and Compressed Air Tanks

Reviewed by CRN expert team · Last updated: October 2, 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 the destination jurisdiction's exemption thresholds typically require CRN
• ASME VIII-1 is the standard design code for most air receivers
• Nameplate must show CRN, MAWP, design temperature

For a standard catalogue unit, the first step is verification rather than registration: confirm the existing registration covers the province of installation and that the unit's nameplate matches the registered design. For a custom receiver, the design registration comes first and the nameplate follows it. In both cases the nameplate is the document an inspector reads, so it must agree with the registration on file.

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 the exemption thresholds of the jurisdiction where they will be installed require CRN. Small portable tanks below threshold may be exempt.

Where a tank is close to an exemption threshold, the determining figures are the jurisdiction's own pressure and volume criteria, not a vendor's general statement. Recording the destination province and the unit's design conditions before purchase keeps the compliance question settled before the equipment arrives on site.

"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."