CSA issues new Editions of TDG Class 2 Cylinder Standards
Transport Canada has issued an update “Notice” to inform the regulated community of recent updates to the Canadian Standards Association (CSA) standards addressing the requirements for the manufacture/qualification, selection and use of cylinders used in the transportation of dangerous goods (TDG).
Although these standards are primarily for compressed gases, their use may also be required or permitted for DG substances, other than Class 2, that may produce toxic or flammable vapours. Typically, this information is cited in standard TP14850 by reference in the packing instructions.
The four standards involved are:
- CSA B339, CSA B340
- (design/manufacture/qualification and selection/use, respectively) regarding cylinders, spheres and tubes, and other similar containers.
- CSA B341, CSA B342
- (manufacture/qualification and selection/use, respectively) regarding UN pressure receptacles and multi-element gas containers (MEGC).
Why Two Sets? Origins
The B339/B340 set are the seventh revision to the standards based on the older CTC (Canadian Transport Commission, pre-Transport Canada) national standards for these types of containers. These versions are the seventh revision of the original editions commencing in 1983 and 1986 respectively.
This contrasts with the B341/B342 set derived from the standards in UN Recommendation model regulations. The Canadian versions referenced here are the 3rd editions following 2009 and 2015 editions. Issuing these as CSA standards, rather than just adopting the UN Recommendations, facilitates incorporating the country-specific aspects such as special permits, reciprocity, etc.
Although the 2 Continue Reading…