The Canadian Registration Number (CRN)  is a number issued by each province/territory in Canada to the design of boilers, pressure vessels or fittings. Industrial instrumentation such as pressure gauges, thermometers and related accessories all fall under this jurisdiction. The CRN identifies that the design has been accepted and registered for use in that province/territory.

加拿大注冊號（CRN）是由加拿大省/地區發布鍋爐設計一個數字，壓力容器或配件。工業儀表如壓力表、溫度計及相關配件都屬于這種管轄權。CRN標識設計已被注冊使用，省/地區。