All FAQs

  • How do I get a CRN number?

    You can get a CRN number by filling out and submitting an application form to the governing organization in the province or territory where the equipment will be used. As each province and territory controls the rules and regulations in its region, you will need to contact the governing body specific to that area in order to obtain the proper application forms and requirements. If the equipment will be used in more than one province or territory, getting a CRN number can be a bit more complicated. In this case, you will need to submit an application to each jurisdiction. Alternatively, you can get a CRN with the help of an organization that has extensive CRN expertise and experience. Organizations like Cammar Corporation can help with pressure equipment design, evaluation and CRN registration. Read More...
  • When should I apply for a CRN?

    If your equipment requires a Canadian Registration Number, you must apply for the CRN before the pressure equipment can be installed and used in Canada. In fact, it is wise to complete your CRN registration before the pressure equipment is in the final stages of design (i.e. before the equipment is built). This will ensure that you follow CSA B51 and other regulations without issue. In any case, to avoid unnecessary complications, make sure that your CRN registration is completed before any assembled equipment leaves the producer. If the equipment will not be assembled until after it leaves the manufacturer (e.g. the equipment must be assembled in the field), be sure the design has a Canadian Registration Number. Read More...
  • Do I need a CRN number?

    Will your pressure equipment operate at 15 PSIG or higher? If so, you may need a CRN number. In most cases, pressure equipment in Canada requires a Canadian Registration Number (CRN). That is unless a CRN exemption applies to your equipment. Exemptions vary from province to province. Therefore, you will need to check the codes and regulations specific to the province or territory in which your pressure system will be developed and operated. If you need a CRN number for your equipment, it must be obtained before the pressure equipment is installed and used. If you require assistance in determining whether your equipment needs a CRN number, Canadian Registration Number (CRN) Services organizations, like Cammar Corporation, can help. Read More...
  • What requires a CRN registration?

    Pressure equipment, including pressure vessels, boilers, piping and fittings, used in Canada requires a CRN registration. Equipment must be registered with a CRN before it is used. In general, if pressure equipment operates at a pressure greater than 15 PSIG it will likely require a CRN registration. In fact, unless a particular exemption applies to the equipment, a Canadian Registration Number is needed. Keep in mind, provincial and territorial governments have the authority to govern equipment safety in their region. Therefore, CRN registration requirements vary by province and territory. As a result, CRN exemptions are set out by provincial and territorial governments. Read More...
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  • Why are CRNs required?

    CRNs, or Canadian Registration Numbers, are required in Canada to ensure public safety. A CRN number Canada helps to guarantee that pressure equipment meets adequate safety requirements. Equipment must be designed, built and tested based on codes and standards that have been developed to protect the public. As well, provincial and territorial governments in Canada use CRNs to assign responsibility for pressure equipment designs. Although each province and territory has authority over registration and requirements in their own region, regulatory bodies work together to ensure that CRNs are recognizable and can be tracked across the country. A CRN is required before the pressure equipment is built. Read More...
  • What is MAWP?

    Per ASME Section VIII-1 Appendix 3, MAWP (maximum allowable working pressure) is “the maximum gage pressure permissible at the top of a completed vessel in its normal operating position at the designated coincident temperature for that pressure.  This pressure is the least of the values for the internal or external pressure to be determined by the rules of Division 1 for any of the pressure boundary parts, including static head thereon, using nominal thicknesses exclusive of allowances for corrosion and considering effects of any combination of loadings listed in the code that are likely to occur at the designated coincident temperature.“ Read More...
  • What is design pressure?

    Per ASME Section VIII-1 Appendix 3, design pressure is “the pressure used in the design of a vessel component together with the coincident design metal temperature, for the purpose of determining the minimum permissible thickness or physical characteristics of the different ones of the vessel.  When applicable, the static head shall be added to the design pressure to determine the thickness of any specific zone of the vessel.” Read More...
  • What is a generic design?

    A generic design describes variable dimensions and feature locations of pressure equipment.  For example, a generic vessel design can describe a variable shell length, all possible nozzle locations and sizes, together with proximities of nozzle groups etc.  For vessels, generic designs cannot vary the head shape, shell diameter, maximum pressure, maximum temperature, or minimum temperature.  Other restrictions may apply subject to regulator acceptance. Read More...
  • What is a boiler?

    Alberta Regulation 49/2006 defines it as “a vessel in which steam or other vapour may be generated under pressure or in which a liquid may be put under pressure by the direct application of a heat source.”  Other legislation and code define it in similar ways.  CSA B51 Boiler, Pressure Vessel and Pressure Piping Code, defines it as “as a vessel under the Act”.  By ‘Act’, CSA B51 refers to the governing statute in each provincial or territorial jurisdiction.  For all boilers registered with a CRN in Canada, in the absence of a Variance issued by the jurisdictional regulatory authority, the requirements of ASME Section I must be met in its entirety. Read More...