Whether it is a fitting, pressure vessel, boiler, or piping system that you want to get CRN registration for, Cammar Corporation can help with the design and evaluation so it complies with the governing adopted codes, standards, and regulations. In other words, it needs to meet CRN requirements.

1. CRN Number Acquisition Help
“…unless pressure equipment is exempt from legislation,
it needs to be properly registered with a
CRN (Canadian Registration Number)
before it can be legally operated.”
Whether it is a fitting, pressure vessel, boiler, or piping system that you want to get CRN registration for, Cammar Corporation
can help with the design and evaluation so it complies with the governing adopted codes, standards, and regulations. In other
words, it needs to meet CRN requirements.
Remember, unless a pressure equipment design is exempt from legislation requirements, it needs to be properly registered with
a CRN (Canadian Registration Number) before it can be legally operated. And to get it registered, it needs to comply with the
related regulations and meet CRN requirements. We can help you do this.
The CRN requirements that Cammar Corporation considers and / or can help you with, include:
 Code or Standard of Construction
The code or standard of construction, and whether it is adopted by the governing provincial regulations, is very important to
consider. Only codes and standards adopted by the regulations or their equivalent are acceptable for use unless
special permission is granted. We can help you determine if yours is adopted or not, and what choices you have.
 Drawings
Suitability of drawings, professional authentication, and amendments to include information consistent with regulatory
requirements need consideration too. Drawings are the things which are registered since they define the design, so their
contents need to be evaluated to ensure that things aren’t missed. Unsuitable drawings can be rejected.
 Calculations
Are further calculations needed? We’ll take a look at what you have, and advise what further calculations are needed. We
can do calculations for you.
 Application Forms
Completion of application forms including statutory declarations, accreditation certificates when they are necessary, and
professionally authenticated documentation can be problematic. Surprisingly, inadequate documentation can be the cause
of many delays or application rejections. We can help you navigate through the forms.
 Radiography
Depending on the design, radiography is needed for all sorts of reasons. We can help you decide what level of radiography is
best for your design or application.
 Required Thickness
All pressure parts need to be adequately thick, including corrosion allowance, to ensure that equipment doesn’t fly apart
under pressure. We can evaluate your design to see if its pressure parts meet thickness requirements or not. What is
a pressure part? Is a pressure part always under pressure? Answers: If a part is removed and the assembly flies apart, then
the part was a pressure part! A pressure part need not be under pressure itself.
 Attached Components
Unless the design details of attached components are included with the application, Canadian Registration Numbers (CRNs)

2. of attached components are necessary. A new CRN can be made from other, combined CRNs. If attached components are
not exempt from registration, then a list of their CRNs will be needed! We can help assist in determining if attached
equipment has a valid CRN or not.
 Weld Dimensions
Construction details and dimensions need to be documented in enough detail to show that the requirements of Section IX and
the code of construction have been met when joining is required. Registration of WPS’s are needed for
domestic construction. Each code of construction has its own rules in relation to weld dimensions, and we can assist with
documenting them properly.
 Heat Treatment
Residual stresses associated with welding is often a concern, and each code of construction describes the pre heat,
temperature hold time, and cool down that is permitted. This needs to be documented properly for each design, and we can
assist with this.
 Design Conditions
Design conditions define the extreme limits at which equipment can be used, and include: the maximum allowable
working pressure (MAWP); maximum allowable working temperature (MAWT); and minimum design metal temperature if
code or standard requires it (MDMT).
 Material Specifications
Is the particular material you would like to use allowed? Different rules apply for listed and unlisted materials, depending on
the proposed code or standard of construction. We can help you determine what’s allowed and what’s not, and help you to
select an alternate, better material choice for your design conditions.
 Material Suitability
Different materials have different temperature limits, strengths, etc. Some can work for you, others can’t. We can help you
decide which is which.
 Impact Testing
In Canada, unfortunately, it is cold for half the year. Really cold sometimes. This means that many metals have brittle
transition temperatures that are above what mother nature affords outside. So, in many cases, impact testing is required. We
can help you decide when it’s necessary, and how to specify it on your drawings.
 Hydro-Testing
The last stage of construction for all pressure equipment, unless exempted for good reason and with the acceptance of the
regulator, is hydro-testing. Often, the test pressure is a function of allowable strength at temperature, and we can help you to
determine what that test pressure must be to meet code or standard requirements.
 Pneumatic-Testing
This can be extremely dangerous, and unless good justification is given and accepted by the regulator, is generally not
allowed in lieu of hydro-testing. We can help you to justify pneumatic testing when it is necessary, and assist in defining a
safe perimeter zone and procedure, to facilitate the test.
 Flange Ratings
Most designs that follow an ASME code or standard use ASME B16.5 flange ratings. If unmodified from the dimensions
and limits specified therein, then further justification for their use is not required by Regulators. However, modified ASME
B16.5 flanges or those used outside of the design limits specified in ASME B16.5, need further justification. Either
ASME Section II, an acceptable full gasket calculation, or Appendix Y calculation will be needed, depending on your
circumstances. We can assist you with this.
 Sharp Edges
Sharp edges can result in stress concentrations, and should be eliminated when possible. Your drawings should show this,
and we can assist you to make sure that appropriate notation is included.
 Proof Testing
When there are no code rules that apply to a proposed geometry, the preferred justification method is proof testing per
UG101 or A22, depending on the code of construction. We can help you determine when such a test is necessary, how to
specify it, report it, and have it witnessed.
 FEA Justification
In the rare event that code rules do not apply and proof testing is infeasible due to economic factors or size of the equipment,
then Regulator’s can permit an FEA. This must be completed in strict adherence to CSA B51 requirements. We can help
you determine if an FEA is justifiable, and how you can make it meet CSA B51 requirements.
 Other Things
Pressure equipment comes in all shapes, sizes, and uses. This article just an introduction. More requirements than what
is mentioned above need to be considered. If you’re thinking about something not mentioned here, the likelihood is that
we’ve seen something like it before. Give Cammar Corporation a call to discuss CRN requirements more!
http://cammarcorporation.com