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Frequently Asked Questions
Design Questions
Q : How do I register a boiler, pressure vessel, fitting or piping system design in Ontario?
A : Please refer to the design registration guidelines under the Design Registration section of this site for instructions on submitting your designs to us for review. Ask us about TSSA's one-stop, national registration service for fittings or pressure vessels by calling (416)-734-3299.
Q : What is a Canadian Registration Number (CRN)?
A : The Canadian Registration Number (CRN) is a number issued by each province or territory of Canada to the design of a boiler, pressure vessel or fitting. The CRN identifies the design has been accepted and registered for use in that province or territory. The province or territory is represented by numeric digits following the decimal point within the CRN as shown in the list below. The first registering province or territory is the first digit after the decimal. For example, a design registered first in Ontario and then in Alberta might be issued the number 4321.52:
1 = British Columbia
2 = Alberta
3 = Saskatchewan
4 = Manitoba
5 = Ontario
6 = Quebec
7 = New Brunswick
8 = Nova Scotia
9 = Prince Edward Island
0 = Newfoundland
N = Nunavut
T = Northwest Territories
Y = Yukon Territory
C, follows the designation of the province of first registration if the design is subsequently registered across Canada (e.g., M 4156.5C shows the design as first registered in Ontario, then across Canada)
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Q : What is an Ontario Identification Number (OIN)?
A : The Ontario Identification Number (OIN) was a number issued by TSSA to uniquely identify each boiler and pressure vessel in Ontario during the period 1965 to June 2003. OIN's were issued for boilers and pressure vessels that had a valid CRN, had been inspected and found acceptable. The OIN is no longer issued by TSSA.
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| Boilers and Pressure Vessels Training Seminar Schedule 2008 / 2009
Seminar Schedule Is Available! | |
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| Director's Order: Boilers and Pressure Vessels Code Adoption Document - Amendment
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| TSSA Update: Boilers and Pressure Vessels/Operating Engineers Edition (Summer 2007)
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| Reminder Notice:
Certificate of Authorization for Refrigeration and Air Conditioning Piping Systems | |
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| Ontario and Alberta Welder Reciprocal Agreement
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| Certificate of Authorization for Refrigeration Contractors
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| Director's Order: Quality Control Systems
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| Piping and Repair / Alteration Certification Programs
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