Transport Canada (TC) has advised stakeholders that 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.Scope of the standards
- CSA B620 “Highway tanks and TC portable tanks for the transportation of dangerous goods” 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.
- CSA B621 “Selection and use of highway tanks, TC portable tanks, and other large containers for the transportation of dangerous goods, Classes 3, 4, 5, 6.1, 8, and 9” 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.
- CSA B622 "Selection and use of highway tanks and TC portable tanks, for the transportation of dangerous goods, Class 2” sets out the selection and use requirements for highway and TC portable tanks transporting dangerous goods of Class 2.
Highlights of changes to the draft standardsCSA B620
- 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.
Please note that the draft safety standards may be accessed from the CSA Group Web (see links above) and cannot be downloaded from the site. Please also note the draft safety standards are reviewed on-line and comments to improve the standard can be posted on-line. If you have difficulty accessing the documents, kindly contact: Ron Meyers, Project Manager, Worker and Public Safety, firstname.lastname@example.orgCOSTHA will be drafting comments for submission. Please provide your comments via email to: email@example.com by May 17, 2019.