Currently in force:
CSA -B621-20

Date published:
November 2020 (English and French)

Amendments in force:

Previous edition:
CSA -B621-14

Upcoming edition / amendment:
A new edition of the Standard is currently under development.


What is the scope of the standard?

The CSA -B621 standard sets out the requirements for selection, use, handling, filling and unloading of highway tanks, TC portable tanks and other large containers, for transportation of dangerous goods included in Classes 3, 4, 5, 6.1, 8 and 9.  The standard does not apply to TC 56, CTC 56, DOT 56, TC 57, CTC 57, or DOT 57 that are no longer manufactured but are still authorized for use as set out in CAN/CGSB-43.146.

Where is the standard referenced in the TDG  Regulations?

Section 5.14 of the TDG  Regulations specifies that a means of containment in accordance with CSA B621 is a permitted container for the transport of dangerous goods in Class 3, 4, 5, 6.1, 8 and 9, by road or by ship.

How do I view the standard for free?

The CSA Group has launched an online platform that allows registered users free access to Transportation of Dangerous Goods (TDG) safety standards published by CSA Group referenced in federal TDG regulations. Users can now log into Communities of Interest and register to find the TDG View Access site at https://community.csagroup.org/community/ohs/tdg-standards-view-access#.

How do I obtain a copy of the standard?

A copy of this standard can be purchased from the Canadian Standards Association (CSA).

When does the 2020 version of CSA B621 come into effect?

This standard has come into effect 19 November 2020 but the regulatory amendment provides a period of transition that allows a person to comply with the 2014 standard until 31 May 2021.

What is the status of the next edition?

The CSA Technical Committee on the B621 standard is continuously working on the next edition.

Where can I obtain more information?

For more information on matters pertaining to CSA B621, please contact a means of containment specialist by email at tdgcontainers-tmdcontenants@tc.gc.ca. Include the text "Highway Tanks" in the subject line.

Quick Links

FAQ on Highway Tanks (tank trucks and trailers) and TC Portable tanks

The FAQ on Highway Tanks (tank trucks and trailers) and TC Portable tanks includes information on the requirements for highway tanks (tank trucks and trailers) and TC portable tanks as well as the requirement to be registered by Transport Canada to manufacture, assemble, modify, repair, inspect or test highway or portable tanks.

Highway and TC Portable Tanks Registered Facilities

Search the TDG database for facilities registered by Transport Canada pursuant to CSA -B620 for manufacture, assembly, modification, repair, inspection and testing, and mobile inspection and testing of highway and TC portable tanks.

CSA B620

Information on CSA B620 (the CSA standard on "Highway tanks and TC portable tanks for the transportation of dangerous goods")

CSA B622

Information on CSA B622 (the CSA standard on "Selection and use of highway tanks and TC portable tanks for the transportation of dangerous goods, Class 2").