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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Safety Advisory: Unauthorized Marking of Compressed Gas Cylinders

Safety advisory notice.

This is to notify the public that we (PHMSA) have discovered the unauthorized marking of high-pressure compressed gas cylinders, mainly cylinders containing welding gases, fire extinguishers, and self-contained breathing apparatus, by Consulting and Safety Specialists, Inc. (CSSI), located at 924 Lefort Bypass, Thibodaux, LA 70301. On November 30, 2006, an inspector from PHMSA's Office of Hazardous Materials Enforcement (OHME) conducted a compliance inspection of CSSI. As a result of that inspection, PHMSA has determined that CSSI did not hold a valid Requalifier Identification Number issued by DOT while requalifying (inspecting, testing, or certifying) high-pressure compressed gas cylinders. In addition, CSSI marked and certified an undetermined number of DOT specification and/or special permit high- pressure compressed gas cylinders as being properly tested in accordance with the Hazardous Materials Regulations (HMR), when it had not verified its equipment to be accurate as required by the HMR. A hydrostatic requalification and visual inspection, conducted as prescribed in the HMR, are used to verify the structural integrity of a cylinder. If the hydrostatic requalification and visual inspection are not performed in accordance with the HMR, a cylinder with compromised structural integrity may have been returned to service when it should have been condemned. Extensive property damage, serious personal injury, or death may result from rupture of a cylinder. Cylinders that have not been requalified in accordance with the HMR may not be charged or filled with compressed gas or other hazardous material and offered for transportation in commerce.

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