Technical Support Document
Requalification (retesting) of Aluminum Cylinders
July 1, 2008
The requalification of cylinders was formally known as the retesting of cylinders. Requalification is done to ensure that a cylinder is still acceptable to continue to be used as a pressure vessel to transport hazardous material. DOT requalifying of a cylinder and the marking thereof are to be performed by an approved DOT requalification facility that has been issued a DOT Requalifiaction Identification Number (RIN). The requirements for the requalifying of DOT cylinders in the US are identified in Title 49 of the Code Of Federal Regulations (CFR) in part 180, "Continuing Qualification and Maintenance Of Packaging" and any applicable DOT exemption.
The requalifying requirements of any cylinder are specific to the DOT specification and/or exemption to which the cylinder was manufactured. The DOT specification and/or exemption number are stamped on the crown of the cylinder. Cylinders manufactured by Catalina Cylinders are marked with "M4002" on the crown of the cylinders. Cylinders manufactured by Catalina Cylinders Cliff Impact Division are marked with "CLIFFDIV" on the crown of the cylinder.
The most basic of the retesting requirements for cylinders manufactured by Catalina Cylinders and Catalina Cylinders Cliff Impact Division are identified below.
All cylinders that have been successfully requalified will have the date of the retest (month and year) stamped in the crown of the cylinder with the RIN of the DOT approved requalification facility stamped between the month and year of the retest date.
If you have any questions with regards to the requalifying of cylinders manufactured by Catalina Cylinders or Cliff Impact please do not hesitate in contacting us directly.
So yeah, go to that page and print that up. Then if you get questions about not filling the tanks due to hydro, have seen it happen multiple times, you have this. I am tempted to find the exact paragraph it lists in that piece there, but after months of searching, i am happy enough with this for today. Maybe tonight i will find the exact paragraph in the DOT codes.