Piping CRN numbers can often be the

most complicated to obtain a CRN.

In addition to code requirements each

province has their own "ACT" which details

what needs to and what does not need to be CRN registered. As a minimum the manufacturer must have a quality system implemented that meets the requirements of CSA B51 or for manufacturers outside of Canada inspection must be performed by a State Boiler Inspector or Insurance Company Inspector, holding a National Board Commision. Outside of Canada the manufacturer alse needs to hold either a ASME U, S, PP stamp or ISO series certification or equivalent.


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Piping CRN

CANADIAN REGISTRATION NUMBER CRN, PRESSURE VESSEL, PIPING AND VALVE ENGINEERS.

Design drawings should show as a minimum the following information:

  • Construction Code (i.e. ASME B31.1, B31.3)
  • Design Pressure
  • Design Temperature
  • Type of pressure and type of test
  • Service Information (e.g. Air, Water, Steam, etc.)
  • Safety/Relief Valve Setting and location; or
  • Statement regarding overpressure protection

Design drawings, pipe specifications and, depending on the province, calculations are to be submitted to the jurisdiction where the CRN is being applied for. 


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Pipe Specifications shall indicate:

  • Pipe line identification.
  • Pipe size and schedule.
  • Pipe material.
  • Fittings classification, identification and rating.
  • Statement attesting that only CRN registered fittings are to be used.
  • Pipe joining methods and details (welding, brazing, or others).
  • NDE.
  • Statement describing maximum support spacing and type, and anchor location.
ROUND ENGINEERING INC.

​PIPING CRN NUMBERS HAVE TO BE OBTAINED FOR EACH INSTALLATION.