Resources
Letters of Interpretation
The following is a list of written interpretations from Office of Hazardous Materials relating to the re-qualification of cylinders.
You can view all interpretation letters to the Office of Hazardous Materials by CFR section at this link
June 25, 2012 Letter of Interpretation regarding the testing of dry chemical fire suppression system cylinders to fire extinguisher specs.
August 9, 2010 Letter of Interpreation About Using the CGA C-1.1 Pamphlet as a Training Resource
May 13, 2008 Letter of Interpretation concerning the use of latest edition CGA pamphlets vs cited editions
May 17, 2007 Letter of Interpretation About Marking a “VE” on Cylinders That Do Not Require a Eddy Current Examination
June 5, 2006 Letter of Interpretation that allows the end use to star stamp a cylinder
July 28, 2026 4B-Extinguishers
July 27, 2026 Proof Test Volume Cylinders
March 30, 2012 Required CGA Editions
March 17, 2026 ISO Transporting in USA
January 19, 2022 Visual Records
March 24, 2021 Concerning 3AL Requalification Period
April 19, 2023 Marking UN Cylinders
April 20, 2023 Concerning 4D Over-Pressurization
April 25, 2022 Concerning Outsourcing Eddy Current Examination
June 24, 2025 Concerning 90 Pretest
July 10, 2025 Marking DOT on UN Cylinders
July 22, 2025 Concerning Condemning End of Service Life
August 28, 2023 Concerning Tested if not Transporting
Did you know that the Office of Hazardous Materials has a support staff available to answer your regulation questions ? You can contact them by email or phone by clicking here.
