- Created on Monday, February 08 2021 05:57
- Written by Sherry Gresham
Luxfer Gas Cylinders position oncerning life extension of DOT-CFFC carbon composite cylinders by means of Modal Acoustic Emission (MAE) requalification
On April 21, 2017, the U.S. Department of Transportation’s (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) announced that it had “issued a special permit to authorize the extension of the 15-year service of certain carbon fiber reinforced aluminum-lined cylinders (DOT-CFFC) that are used in self-contained breathing apparatuses by firefighters and first responders.” The PHMSA website states that under this new Special Permit 16320, issued to Digital Wave Corporation, “cylinder life can be extended an additional 15 years through the use of Modal Acoustic Emissions (MAE) testing . . . in five-year increments. . . .”
Luxfer Gas Cylinders, the world’s largest manufacturer of carbon composite cylinders used in self-contained breathing apparatuses (SCBA), has not been involved with this new life-extension program. Luxfer 15-year SCBA cylinders are designed and approved in the U.S. (Special Permit 10915) and Canada for a 15-year service life, and Luxfer accordingly issues a 15-year warranty for the full service life of each cylinder it manufactures. Since 1995, Luxfer has made more than 10 million carbon composite SCBA cylinders, which have an exceptional safety record. Over the years, Luxfer has conducted a significant amount of testing over and above standard requirements to ensure that Luxfer cylinders can stand up to demanding firefighting environments for a 15-year period.
The special permit issued to Digital Wave initially required that the original special permit marking of each cylinder requalified by means of MAE testing be covered and replaced with “DOT-SP-16320.” However, on October 5, 2017 the Special Permit was reissued with the requirements modified so that cylinders that have been requalified by MAE “must be marked “DOT-SP 16320”in addition to the original cylinder special permit number. This was change was enacted to overcome the fact that no SCBA manufacturer has approved Digital Wave life extended cylinders. Leaving Luxfer’s Special Permit number on a cylinder that is used in service beyond 15 years violates that terms of the permit, but we have no way to compel Digital Wave to remove our permit number. Luxfer cannot accept responsibility or liability for use of Luxfer-manufactured cylinders beyond the 15-year service life for which they were designed, nor does the Luxfer cylinder warranty extend beyond 15 years.
30-year Luxfer SCBA cylinders already available
Since 2008, Luxfer has manufactured and sold carbon composite SCBA cylinders with a 30-year design life under its LCX®-EL (Extra Life) brand. These cylinders are heavier and have thicker liners and more composite reinforcement than Luxfer 15-year designs as this is needed to meet performance requirements of the 30-year DOT special permit, as well as international standards for cylinders with a 30-year life.
Luxfer offers a wide range of SCBA cylinders
As part of a comprehensive range of SCBA cylinders, Luxfer also offers specially engineered higher-pressure (5,500-psi) cylinders, as well as super-lightweight models (LCX®-SL range) and extreme-duty models (LCX®-XL range).
• June 7, 2017
Posted by: Luxfer Gas Cylinders
• SCBA and life support