Propane cylinders have identifying marks on the cylinder collar. The diagram shown is an example of a propane cylinder collar and some of the marks commonly present.
One marking that is important to consumers is the “restest” date, also known as the “requalification” date. Propane cylinders need to be requalified or replaced every ten years.
• Letter H in the diagram shows the original qualification date (i.e. the diagram indicates April
of 1994).
• Letter I in the diagram shows where the retest date is to be stamped if the cylinder is requalified (i.e. no date is shown which indicates the ten—year requalification is overdue). The original test date (H) and any requalification dates (I) must be presented in a specific manner.
The following information, obtained from Transport Canada, indicates how that date information is to be presented (as per Clause 24 of CAN/CSA-B339):
• Firstly, month requalification performed (two digits), followed by a space.
• Secondly, requalifier’s registered mark, followed by a space.
• Thirdly, year requalification performed (last two digits only).
• Finally, for requalification dates, the procedure symbol, followed by a space, where applicable (for propane cylinders, it is the letter E, which stands for “External Visual”).
Download the Guide to Cylinder Markings, from the Canadian Propane Association.
Budget Propane Ontario supplies bulk propane to residential, commercial, and construction sites in central Ontario. Call us to discuss your needs and to learn about the benefits of using propane. 1 888 405.7777