Authorized DOT Cylinder Requalifiers
This link is effective for finding requalifiers in a specific area. You can use the map or search by specific RIN/VIN number by following the instructions on the page above the map (by number it may not always work.)
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Code of Federal Regulations Title 49
Link to CFR 49 - Transportation, Chapter 1, SubChapter C - New version of application.
For requalification procedures click below:
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DOT Special Permits List
Search Special Permit numbers by finding and clicking the group range that contains the permit you are looking for.
Note: the Search feature does not find expired special permit numbers. If you search for a special permit and it is expired, it will not find the documentation.
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Eddy Current - VE Stamp
This link refers to CFR 49, Section 180. Scroll to paragraphs 180.209.m & 180.213 for eddy current testing requirements & VE marking.
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M Numbers Search - Domestic (US)
Enter search details for specific company or scroll through the numerical list for the M number you are looking for to identify the US manufacturer.
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M Numbers Search - Foreign
Click the link for a downloadable copy of the Foreign Cylinder Manufacturers as of 2024
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NIOSH Respirator User Notice
NIOSH notice about SLC in 6351 Cylinders
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OSHA - Occupational Safety & Health
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OSHA - CFR 29 - 1910.101A
OSHA - Compressed Gas Regulations
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TC TDG Facilities and Service Providers
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