Highway and TC portable tanks for the transport of dangerous goods
Current status: Closed
Opened on April 12, 2019 and closed on June 11, 2019.
The Canadian Standards Association (CSA) has released the drafts of the update to safety standards CSA B620, CSA B621 and CSA B622 for a 60-day consultation period. Once the safety standards have been finalized and published, a notice will be issued specifying the coming into force date of the updated standards.
- Safety standard CSA B620 sets out the requirements for the design, manufacture, assembly, modification, inspection, testing and repair of highway and TC portable tanks. The standard also prescribes registration requirements by Transport Canada (TC) of facilities, Design Engineers and Design Review Agencies for conducting the activities within the scope of the standard.
- Safety standard CSA B621 sets out the selection and use requirements for highway and TC portable tanks transporting dangerous goods of Class 3, 4, 5, 6.1, 8, and 9.
- Safety standard CSA B622 sets out the selection and use requirements for highway and TC portable tanks transporting dangerous goods of Class 2.
Join in: how to participate
Share your ideas
Please note that all CSA public review drafts are reviewed on-line and comments from the public to improve the standard can be posted on-line. The draft cannot be downloaded, but may be accessed from the CSA Group Web site via the following links:
CSA B620 Draft
CSA B621 Draft
CSA B622 Draft
Who is the focus of this consultation
All Canadians are invited to participate in the online consultations. Those with a particular interest may include:
- Highway tank associations
- Highway tank facilities
- DG carriers and haulers
Key questions for discussion
The draft safety standards build on CSA B620-14, CSA B621-14 and CSA B622-14 by incorporating the following notable technical changes:
- Updated American Society of Mechanical Engineers (ASME) code by referencing dynamically to the latest edition of the ASME code;
- Revised tank securement requirements for all tanks;
- Revised damage protection requirements for TC 331, TC 338 and TC 341 tanks;
- Certain TC 331 tanks subject to 10-year internal inspections and pressure testing instead of every 5 years;
- Reintroduction of TC 51 portable tanks, with updated requirements;
- Revised insulation requirements for TC 423 tanks;
- New pressure gauge selection and calibration requirements for pressure tests;
- Revised thickness testing requirements;
- Revised pressure testing requirements;
- Revised inspection and test reporting requirements;
- Updated tank inspector and tester training and qualification requirements; and
- New training organization registration requirements for qualification of inspectors and testers.
- Non-rectangular TC 44 tanks are no longer limited to diesel fuel only. Permitted for transport of other dangerous goods, similar to TC 406 and equivalent tanks;
- Revised requirements for tanks with an intermediate bulkhead;
- Emergency shutoff marking requirements for manually activated remote shutoff device;
- Revised dangerous goods table sorted by United Nations (UN) number; and
- At least two chock blocks required when using chock blocks to prevent unintended vehicle movement.
- 10-year internal inspection and pressure test frequency permitted for certain smaller tanks with maximum capacity of 13250L and used to transport UN1075 (LPG) or UN1978 (Propane);
- Revised emergency discharge control of tanks in compressed liquefied gas service (not including class 2.2) – all tanks with a 5-year phase in period;
- Revised and updated nurse tank and nurse tank piping requirements for the agricultural sector;
- Revised dangerous goods table sorted by UN number;
- At least two chock blocks required when using chock blocks to prevent unintended vehicle movement;
- Emergency shutoff marking requirements for manually activated remote shutoff device; and
- Portable tanks loaded while on vehicle require tank securement designed by Professional Engineer.
Project Manager, Worker and Public Safety
178 Rexdale Blvd.
Telephone: 416 747 2496