FAQ on Cylinders

What cylinders and tubes can I use in Canada?

How do I identify a TC specification cylinder or tube?

Where can I get a TC specification cylinder or tube?

Design and Construction 

What are the requirements for TC specification cylinders and tubes?

Can I convert a non-TC specification cylinder or tube into a TC specification cylinder or tube?

Selection and Use

Can I modify a TC specification cylinder or tube?

How do I select and use the right TC specification cylinder or tube for the dangerous goods?

Can I use a cylinder or tube other than a TC specification cylinder or tube to transport Class 2 dangerous goods?

What are the orientation requirements for containers during transportation?

Requalification, Reheat Treatment, Repair and Rebuilding

What are the requirements for periodic requalification, reheat treatment, repair and rebuilding of cylinders and tubes?

Where can I find a registered requalifier?

How do I identify a requalified cylinder or tube?

Facility Registration

How do I register to requalify cylinders and tubes in accordance with CSA B339?

How do I register to periodically inspect and test UN pressure receptacles in accordance with CSA B341?

How do I register to repair, reheat treat and rebuild cylinders and tubes in accordance with CSA B339?

How do I register as a TC specification cylinder or tube manufacturer?

How do I register as an Independent inspector in accordance with CSA B339?

How do I renew a Certificate of Registration?

How do I change the company name on a Certificate of Registration?

How can I request an amendment to an existing registration?

Where can I obtain more information?

What cylinders and tubes can I use in Canada?

Cylinders and tubes for transport of dangerous goods in Canada must be in accordance with the requirements set out in section 5.10 of the TDG Regulations. Specifically, subsection 5.10(1) references CSA B340 and CSA B342 which are two safety standards that address the requirements for cylinders and tubes used to transport Class 2 dangerous goods.

CSA B340 includes the selection and use requirements for older cylinder and tube specifications that have been in use in Canada for many years as well as newer cylinders and tubes that have been manufactured in accordance with CSA B339. Subsection 5.10(2) of the TDG Regulations requires that cylinders and tubes used in accordance with CSA B340 be manufactured in accordance with CSA B339. Cylinders and tubes manufactured in accordance with CSA B339 are commonly referred to as “TC specification” cylinders and tubes. Non-TC specification cylinders and tubes that were manufactured before January 1, 1993 may also be used in accordance with CSA B340 but must meet the requirements specified in paragraph 5.10(2)(b) or 5.10(2)(c) of the TDG Regulations. The prefix of the specification designation of these cylinders and tubes is marked as “CRC”, “BTC”, “CTC”, “ICC”, or “DOT”.

CSA B342 provides an alternative regulatory framework for using cylinders and tubes in Canada. This framework is closely aligned with the United Nations Recommendations on the Transport of Dangerous Goods – Model Regulations which has been developed to facilitate the international transport of dangerous goods. Cylinders and tubes used in accordance with CSA B342 are referred to as UN cylinders and UN tubes. Together, UN cylinders and UN tubes are referred to collectively as UN pressure receptacles. CSA B342 only authorizes the use of UN pressure receptacles that have been manufactured in accordance with CSA B341 and marked with the letters “CAN”, depicting Canada as the country of approval or UN pressure receptacles that have been manufactured in accordance with Title 49 of the U.S. Code of Federal Regulations (49 CFR) and marked with the letters “USA” as the country of approval. Canada and the USA mutually recognize the regulatory approvals for UN pressure receptacles. This means that UN pressure receptacles marked with “CAN” or “USA” as the country of approval can be used seamlessly and interchangeably in the United States and Canada. For more information on UN pressure receptacles, such as how to identify them, click here.

How do I identify a TC specification cylinder or tube?

A TC specification cylinder or tube will have a permanent marking displayed on it that meets the marking requirements set out in clause 4.18 of CSA B339.  Markings will be in a format similar to that shown below.  Certain markings are not required for all cylinder or tube specifications, as denoted by ‘where applicable'.  Please consult the standard for the marking requirements in their entirety.

  1. Transport Canada mark “TC”
  2. specification designation
  3. service pressure (in bar)
  4. manufacturer's registered mark
  5. manufacturer's serial number (numbers, letters)
  6. test month and year
  7. independent inspector's registered mark (between month and year of test date)
  8. the letters “ST” followed by service temperature in degrees Celsius, where applicable
  9. the word “SPUN” where an end closure in the finished container has been welded by the spinning process, or the word “PLUG” where an end closure in the finished container has been effected by plugging
  10. water capacity (in litres) and the unit symbol “L”, where applicable
  11. the letter “T” followed by the tare (in kg) and the unit symbol “kg”, where applicable
  12. the letter “M” followed by the mass (in kg) and the unit symbol “kg”, where applicable
  13. the letters “REE” followed by the rejection elastic expansion, in mm
  14. the letters “DT” followed by the length of the dip in mm, followed by the unit symbol “mm”, where applicable
  15. the manufacturer's maximum rated capacity in cubic metres, (acetylene cylinders only)

Where can I get a TC specification cylinder or tube?

TC cylinder and tube manufacturers registered under CSA B339

Design and Construction

What are the requirements for TC specification cylinders and tubes?

As of January 1, 1993, cylinders and tubes for use in Canada must be designed, manufactured and tested in conformance with the requirements set out in the CSA B339 standard.  The requirements specified in this standard pertain to design, manufacturing and testing, inspection and marking.

Can I convert a non-TC specification cylinder or tube into a TC specification cylinder or tube?

NO. Once a cylinder or tube has been manufactured, there are no measures that can be taken to allow that cylinder or tube to meet the requirements of a TC specification.

Selection and Use

Can I modify a TC specification cylinder or tube?

NO.  A TC cylinder or tube must always be “in standard”.  Since cylinders and tubes are a “standardized means of containment” under the TDG Regulations, they must always remain in compliance with the requirements of the standard to which they were certified.

How do I select and use the right TC specification cylinder or tube for the dangerous goods?

It is the consignor's responsibility to select the appropriate cylinder or tube for their dangerous goods consignment.  CSA B340 is the safety standard applicable to the selection and use of cylinders, spheres, tubes, and other containers for the transportation of dangerous goods, Class 2.  To facilitate selection, the consignor should become familiar with the components of the markings on TC specification cylinders and tubes.

Can I use a cylinder or tube other than a TC specification cylinder or tube to transport Class 2 dangerous goods?

Yes. Subsection 5.10(2) of the TDG Regulations allows the use of certain cylinders and tubes manufactured before January 1, 1993 to transport Class 2 dangerous goods, provided they meet the requirements specified in the Regulations.

In addition, certain cylinders and tubes are approved for use under an Equivalency Certificate.  Such cylinders have the Equivalency Certificate number marked on them (e.g., TC-SU ####).  These cylinders and tubes must be used and periodically requalified in accordance with the terms of the respective Equivalency Certificate.

What are the orientation requirements for containers during transportation?

Clause 4.2.3 of safety standard CSA B340 requires that all containers filled with refrigerated liquid gas (e.g. UN1963 – helium, refrigerated liquid) or a liquefied flammable gas (e.g. UN1978 – propane) be transported in an upright position unless the container is designed for horizontal service. Additional requirements apply to manifolded containers.

Requalification, Reheat Treatment, Repair and Rebuilding

What are the requirements for periodic requalification, reheat treatment, repair and rebuilding of cylinders and tubes?

Only facilities registered by Transport Canada are allowed to requalify, repair, rebuild or reheat treat cylinders and tubes authorised for use in Canada by the TDG Regulations.  Requalification, repair and rebuilding of cylinders and tubes must be conducted in accordance with the requirements of clause 24 of the CSA B339 standard.  For periodic requalification, the standard requires that procedures detailed in certain CGA publications be followed.  A cylinder or tube must not be filled unless it is within its requalification period specified in clause 24 of CSA B339.  The requalification frequency varies according to specification of the cylinder or tube and its contents.

Where can I find a registered requalifier?

TC Registered Cylinder and Tube Requalifiers

How do I identify a requalified cylinder or tube?

Clause 24 of CSA B339 specifies the marking requirements for cylinders and tubes that have been requalified.  The marking arrangement is as follows:

A B C D E

A = month requalification performed (two digits), followed by a space
B = requalifier's registered mark, followed by a space
C = year requalification performed (last two digits only)
D = procedure symbol, followed by a space, where applicable
E = repairer's, rebuilder's, or reheat treater's registered mark, if applicable

Facility Registration

How do I register to requalify cylinders and tubes in accordance with CSA B339?

To register to requalify cylinders and tubes, each facility must submit an application to the Director. The registration requirements for a facility are addressed in clause 25.3 of CSA B339, however, application forms have been developed to facilitate the registration process.

To register to requalify cylinders by external visual inspection in accordance with CSA B339, a completed external visual inspection application form must be submitted.

To register to requalify cylinders for acetylene service in accordance with CSA B339, a completed acetylene cylinder requalification application form must be submitted.

To register to requalify cylinders by pressure test and visual inspection in accordance with CSA B339, a completed pressure test and visual inspection application form must be submitted. Applicants must also be familiar with the pressure test training requirements that apply to individuals requalifying cylinders at registered requalification facilities.

The Director will issue a Certificate of Registration to facilities meeting the requirements to requalify cylinders and tubes set out in clause 24 of CSA B339. Upon registration, an identifying mark is issued to each requalifier. This mark must be stamped or affixed, depending on the container specification, on the cylinder or tube each time it is requalified.  A Certificate of Registration is valid for a period of five years, prior to which time the facility must apply for renewal.

Cylinder or tube manufacturers holding a Certificate of Registration are authorized to requalify containers of the specification listed on their Certificate of Registration.

How do I register to periodically inspect and test UN pressure receptacles in accordance with CSA B341?

To register to periodically inspect and test UN pressure receptacles, each facility must submit an application to the Director. The registration requirements for a facility are addressed in Annex B of CSA B341. Note that a registration to requalify cylinders pursuant to CSA B339 does not automatically allow a facility to periodically inspect and test UN pressure receptacles; registration to CSA B341 is required. The Certificate of Registration, once obtained, will show which standards the facility has been registered to.

To register to periodically inspect and test UN pressure receptacles by pressure test and visual inspection in accordance with CSA B341, a completed pressure test and visual inspection application form must be submitted. Applicants must also be familiar with the pressure testing training requirements that apply to periodic inspection and test personnel at registered facilities.

The Director will issue a Certificate of Registration to facilities meeting the requirements to periodically inspect and test UN pressure receptacles set out in Annex B of CSA B341. Upon registration, an identifying mark is issued to each periodic inspection and test body. This mark must be stamped or affixed, depending on the container specification, on the UN pressure receptacle each time it is periodically inspected and tested. A Certificate of Registration is valid for a period of five years, prior to which time the inspection and test body must apply for renewal.

UN pressure receptacle manufacturers holding a Certificate of Registration are authorized to periodically inspect and test UN pressure receptacles of the specification listed on their Certificate of Registration.

How do I register to repair, reheat treat and rebuild cylinders and tubes in accordance with CSA B339?

To register to repair, reheat treat and rebuild cylinders and tubes, each facility must submit an application to the Director in accordance with clause 25.3 of CSA B339. The Director will issue a Certificate of Registration to facilities meeting the requirements to repair, reheat treat and rebuild cylinders and tubes set out in clause 24 of CSA B339. Upon registration, an identifying mark is issued to each facility. This mark must be stamped on the cylinder or tube upon completion of the repair, reheat treatment or rebuild. A Certificate of Registration is valid for a period of five years, prior to which time the facility must apply for renewal.

Cylinder or tube manufacturers holding a Certificate of Registration are authorized to repair, reheat treat and rebuild containers of the specification listed on their Certificate of Registration.

Applicants should consult the Engineering Services Division prior to submitting an application for registration. This consultation will be used to provide the applicant with feedback regarding the scope of the application and to confirm the type of information that will be needed to process the application. The goal of this consultation is to ensure that applicants are well informed prior to submitting the application and to ensure that the applicant is able to submit a complete application. Incomplete applications will significantly delay the review process and may result in the denial of the application. In order to initiate a consultation, please submit a request for a consultation via email to tdgcontainers-tmdcontenants@tc.gc.ca and include a general description of the scope of registration that you are seeking.

How do I register as a TC specification cylinder or tube manufacturer?

The TDG Regulations require that cylinders and tubes used for the transport of Class 2 dangerous goods be manufactured at facilities registered with Transport Canada in accordance with the CSA B339 standard.  Only manufacturers who are registered by Transport Canada as required in clause 25 of the standard are permitted to manufacture TC specification cylinders and tubes. To register to manufacture cylinders and tubes, each manufacturing facility must submit an application to the Director in accordance with clause 25.2 of CSA B339. The Director will issue a numbered Certificate of Registration to manufacturers of TC specification cylinders or tubes who meet the requirements of the standard.  The manufacturer's registered mark indicated on the Certificate of Registration is included in the permanent marking of each cylinder or tube.  A Certificate of Registration is valid for a period of five years, prior to which time the facility must apply for renewal.

Applicants should consult the Engineering Services Division prior to submitting an application for registration. This consultation will be used to provide the applicant with feedback regarding the scope of the application and to confirm the type of information that will be needed to process the application. The goal of this consultation is to ensure that applicants are well informed prior to submitting the application and to ensure that the applicant is able to submit a complete application. Incomplete applications will significantly delay the review process and may result in the denial of the application. In order to initiate a consultation, please submit a request for a consultation via email to tdgcontainers-tmdcontenants@tc.gc.ca and include a general description of the scope of registration that you are seeking.

How do I register as an Independent inspector in accordance with CSA B339?

To register to as an independent inspector for new, reheat-treated, or rebuilt TC cylinders and tubes, the applicant must submit an application to the Director in accordance with Clause 25.4 of CSA B339. The Director will issue a Certificate of Registration to applicants meeting the inspection requirements set out in Clause 25.4 of CSA B339. Upon registration, an identifying mark is issued to each independent inspector. This mark is to be applied on each TC cylinder or tube at time of manufacture and shall be considered a declaration that the requirements for the TC cylinder or tube have been met. A Certificate of Registration is valid for a period of five years, prior to which time the facility must apply for renewal.

Applicants should consult the Engineering Services Division prior to submitting an application for registration. This consultation will be used to provide the applicant with feedback regarding the scope of the application and to confirm the type of information that will be needed to process the application. The goal of this consultation is to ensure that applicants are well informed prior to submitting the application and to ensure that the applicant is able to submit a complete application. Incomplete applications will significantly delay the review process and may result in the denial of the application. In order to initiate a consultation, please submit a request for a consultation via email to tdgcontainers-tmdcontenants@tc.gc.ca and include a general description of the scope of registration that you are seeking.

How do I renew a Certificate of Registration?

The Director may issue a new Certificate of Registration where the Director is satisfied that the applicant has demonstrated familiarity with the requirements of the standard and the capability to consistently meet the requirements of the standard. This Certificate of Registration will replace any Certificate of Registration previously issued to the facility.

Requalifiers:

Requalification facilities wishing to renew a Certificate of Registration authorising the requalification of cylinders or tubes pursuant to CSA B339 must apply to the Director in the same manner as for an initial application. Facilities are expected to submit an application for renewal at least three months prior to the expiry date of the Certificate of Registration.

Repairers, reheat treaters and rebuilders:

To renew a Certificate of Registration, the certificate holder must submit a written application for renewal in accordance with clause 25.3 of the CSA B339 standard, at least 3 months prior to expiry of the existing registration. The renewal application must indicate any changes to the information included in the initial application.  If there are no changes, a statement to that effect should be made in the renewal application.

Manufacturers:

To renew a Certificate of Registration, the certificate holder must submit a written application for renewal in accordance with clause 25.2 of the CSA B339 standard, at least 3 months prior to expiry of the existing registration. The renewal application must indicate any changes to the information included in the initial application.  If there are no changes, a statement to that effect should be made in the renewal application.

Independent Inspectors:

To renew a Certificate of Registration, the certificate holder must submit a written application for renewal in accordance with clause 25.4 of the CSA B339 standard, at least 3 months prior to expiry of the existing registration. The renewal application must indicate any changes to the information included in the initial application. If there are no changes, a statement to that effect should be made in the renewal application.

How do I change the company name on a Certificate of Registration?

A Certificate of Registration is issued to an individual or to a corporate entity who is the certificate holder. A certificate of registration may not be conveyed from one certificate holder to another. A name change on a Certificate of Registration is only permitted if the certificate holder remains the same individual or corporate entity as before. In such a case the certificate holder may submit a written request to the Director. The request must include the Certificate of Registration number, the new certificate holder name, a justification that the conditions for name change apply, and the date on which the change is proposed to become effective.

How can I request an amendment to an existing registration?

A facility registered with Transport Canada pursuant to CSA B339 must submit an application for an amendment to a Certificate of Registration to the Director when there is a change to the information previously submitted to the Director for the purpose of obtaining a Certificate of Registration or when the facility wishes to request a change in the scope of its existing registration.

The Director may issue a revised Certificate of Registration where the Director is satisfied that the applicant has demonstrated familiarity with the requirements of the standard and the capability to consistently meet the requirements of the standard depending on the nature of the amendment. This Certificate of Registration will replace any Certificate of Registration previously issued to the facility.

Requalifiers:

Requalification facilities wishing to amend an existing Certificate of Registration authorising the requalification of cylinders or tubes pursuant to CSA B339 must apply to the Director in the same manner as for an initial application.

Repairers, reheat treaters and rebuilders:

The information required to request an amendment to an existing registration will vary depending on the nature of the amendment. Applicants should consult the Engineering Services Division in order to seek further instructions. To initiate a consultation, please submit a request for a consultation via email to tdgcontainers-tmdcontenants@tc.gc.ca and include a reference to your file number as well as a general description of the amendment that you are seeking.

Manufacturers:

The information required to request an amendment to an existing registration will vary depending on the nature of the amendment. Applicants should consult the Engineering Services Division in order to seek further instructions. To initiate a consultation, please submit a request for a consultation via email to tdgcontainers-tmdcontenants@tc.gc.ca and include a reference to your file number as well as a general description of the amendment that you are seeking.

Independent Inspectors: 

The information required to request an amendment to an existing registration will vary depending on the nature of the amendment. Applicants should consult the Engineering Services Division in order to seek further instructions. To initiate a consultation, please submit a request for a consultation via email to tdgcontainers-tmdcontenants@tc.gc.ca and include a reference to your file number as well as a general description of the amendment that you are seeking.

Where can I obtain more information?

For more information:

Inquiries pertaining to applications for registration:
1-855-298-1520
After choosing the language (1 for English, 2 for French), press option 1.

MOCregister-Registrecontenant@tc.gc.ca

Technical inquiries pertaining to TC cylinders and tubes:
tdgcontainers-tmdcontenants@tc.gc.ca.
Please include the text "Cylinders" in the subject line.

Quick links

CSA B339

Information on CSA B339 (the standard on "Cylinders, Spheres, and Tubes for the Transportation of Dangerous Goods".

CSA B340

Information on CSA B340 (the standard on "Selection and Use of Cylinders, Spheres, Tubes, and Other Containers for the Transportation of Dangerous Goods, Class 2").

Cylinder manufacturers

Search the TDG database for cylinder and tube manufacturers registered with Transport Canada to manufacture cylinders in accordance with CSA B339.

Cylinder requalifiers

Search the TDG database for cylinder and tube requalifiers registered with Transport Canada in accordance with CSA B339.

Independent inspectors for cylinder and tube manufacture

Search the TDG database "Independent inspectors for cylinder and tube manufacture" for inspectors registered with Transport Canada to provide in-plant inspection at cylinder and tube manufacturing facilities in accordance with CSA B339.

CTC special permits

Paragraph 5.10(2)(b) of the TDG Regulations allows cylinders manufactured until the end of 1992 in accordance with permits (CTC special permits) issued under the Canadian Transport Commission (CTC) “Regulations for the Transportation of Dangerous Goods by Rail” to continue in use to transport Class 2 dangerous goods in accordance with the terms of the respective CTC Permit.

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