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The Useful Life of a CNG Cylinder - All You Need To Know

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  • The Useful Life of a CNG Cylinder - All You Need To Know

    Posted on Feb 25, 2014 by Shelley Mika - Also by this author
    [COLOR=#333333][FONT=Arial]Compressed natural gas (CNG) cylinders aren'€™t like your run-of-the-mill fuel tank. They are pressurized, which means users must take special precautions when it comes to proper maintenance, replacement and disposal. Because of the potential safety hazards of improper care, it's important to know the useful life of a CNG cylinder and to strictly follow recommended replacement times.

    Determining Useful Life
    The most obvious way to determine the useful life of a CNG cylinder is the expiration date listed on the cylinder's label.
    Last edited by John Mitton; 09-03-2015, 08:42 AM.

    • Curtis
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      Curtis commented
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      Re: The Useful Life of a CNG Cylinder - All You Need To Know

      Article continued.

      Dimmick said the Clean Vehicle Education Foundation has seen CNG tanks fail. And, while these incidents are few, they are serious in nature.
      “CVEF believes that it is very important to comply with the safety standards and codes for CNG cylinders. The failure modes that drive the tests in FMVSS 304 and NGV2 are a CNG leak and a cylinder rupture and these tests are predicated on a finite design life,” he said. “The Clean Vehicle Education Foundation assists in the investigation of serious incidents involving NGVs and these include a number of ruptures. In some cases, the cylinder had exceeded its labeled life but it has not been definitively possible to state that this was the cause of the rupture. From a statistical standpoint, relatively few CNG cylinders have been in service long enough to exhaust their design life.”

      “We strongly discourage fleets from purchasing used CNG cylinders, since it is very difficult to determine their history, such as whether or not they were involved in an accident. Damage is easily disguised but can have detrimental consequences,” Wollgiehn said. “Pricing can also be an indicator. If it sounds too good to be true, it usually is.”
      When in doubt, Horne of the Clean Vehicle Education Foundation said the best rule of thumb is to never deviate from code and manufacturer guidelines.

      “As long as the CNG cylinder owners follow the code requirements and manufacturers’ instructions concerning the inspection programs and the end of life date noted on the cylinder labels, we will continue to have safe and reliable CNG storage systems,” he said. “As we move toward more OEM products these issues will be part of the OEM maintenance programs and notices for the end of life removal, decommissioning and proper disposal of cylinders.”
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  • The Useful Life of a CNG Cylinder - All You Need To Know
    Curtis
    Posted on Feb 25, 2014 by Shelley Mika - Also by this author
    [COLOR=#333333][FONT=Arial]Compressed natural gas (CNG) cylinders aren'€™t like your run-of-the-mill fuel tank. They are pressurized, which means users must take special precautions when it comes to proper maintenance, replacement and disposal. Because of the potential safety hazards of improper care, it's important to know the useful life of a CNG cylinder and to strictly follow recommended replacement...
    05-05-2014, 12:59 PM
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