Refrigeration: For TSSA, not required if Capacity is less than 3 Tons (11 KW)
Pressure Vessels: Per the Saskatchewan website, for a new boiler or a pressure vessel,
there are exceptions if it bears a CRN from another province or it if has been NB
approved, among other requirements. Please view their site for complete details:
TSSA lays out in a flow-chart form the requirements for piping registration in Ontario:
ABSA will not register a fluid that is not “expansible”, thus excluding systems such
as hydraulic systems.
Please remember that this has been supplied for information purposes only. Only ASME
can interpret the Code rules, and each Canadian Jurisdiction has their own requirements.
The data presented in the following flowcharts is published in the B51 Code and serves
as a general guide for fluids categorized as either "not more hazardous than water",
"non-lethal", or "lethal". When dealing with a specific case, there may be additional
factors to consider.
When is a CRN Number required?
TABLE 1 CATEGORIES OF FITTINGS
Type of fitting
Pipe fittings : including couplings, tees, elbows, wyes, plugs, unions, nipples,
pipe caps or reducers
Flanges : all flanges
Valves : all line valves
Expansion joints, flexible connections, and hose assemblies : all types
Strainers, filters, separators and steam traps
Measuring devices : including pressure gauges, level gauges, sight glasses, level
and pressure transmitters
Certified capacity-rated pressure-relief devices acceptable as primary overpressure
protection on boilers, pressure vessels and pressure piping, and fusible plugs
Pressure-retaining components that do not fall into any of the above categories.
What category does the fitting fall under?
-For Fittings, this position has a zero placeholder.
-For Pressure Vessels, this position is blank.
-For Pressure Piping, both positions 1 & 2 have a "P", such as PP2785.7
-For Fittings, this position holds the category of the fitting.
-For Pressure Vessels, it holds an assigned letter.
-For Power Piping, it holds a 'P', as noted above.
-See table below for each Jurisdiction's identification number/letter.
-For a Canada-wide registration, the user can place a 'C' here instead of listing
all of the other jurisdictions. For example, for a fitting: 0A2548.2C.
-For certain categories of fittings, see comments entitled “Limited CRN Registration”
relating to how to handle the fact that BCSA & Saskatchewan will not register these
categories of fittings.
The acronym 'CRN' stands for: Canadian Registration Number. This number is issued
by a Canadian Jurisdiction and covers either pressure vessels, fittings, or pressure
piping. It is a necessary authorization allowing these components to be in operation
in Canada. The Canadian standard B51 defines it as having the following features: