THE RULES HAVE CHANGED The Department of Transportation has recently changed Special Permit 14157. SP14157 covers all Worthington Cylinder X-Series, 3442 PSI steel scuba cylinders. Changes to SP14157 include how the cylinder is evaluated for pass / fail at the time of requalification hydro test. These cylinders are no longer evaluated by the percentage of Permanent Expansion. These cylinders are now evaluated for pass / fail by the REE (Rejection Elastic Expansion). That is, the Elastic Expansion cannot exceed the Rejection Elastic Expansion. The REE is stamped into the shoulder of every X-Series Worthington cylinder and it is located on our website.
A similar change has also occurred to Transport Canada’s TC-SU 4957 Equivalency Certificate.
Please note that these changes do not have any effect on Worthington LP-Series DOT 3AA steel cylinders or Worthington aluminum 3AL aluminum cylinders.
Worthington Cylinders continues to recommend that the Hydrostatic Requalification Procedures released on June 4, 2010 …