Cylinder Requalification Markings

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Following requalification, each cylinder shall be plainly and permanently marked in accordance with CSA B339-14 standard.

The CPA reminds members that the markings shall be arranged horizontally (A B C D E), where:

A = month of requalification (two digits), followed by a space
B = requalifier’s or, where applicable, independent inspector’s registered mark (indicated by XY in
Clause 24.6.3.2), followed by a space
C = year of requalification (last two digits only)
D = procedure symbol (Δ, ★, ♦, , E, R, RB, RH, S, FS or VE), followed by a space
E = repairer’s (if different from requalifier), rebuilder’s, or reheat treater’s registered mark (indicated by
WZ — see Clause 24.6.3.2 of CSA B339-14).

TDG Standards such as the CSA B339 can be viewed online. Register or log in at https://community.csagroup.org/welcome and scroll down to click on “TDG STANDARDS” in the View Access column.

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