A person must meet the requirements of 49 CFR Section 107.805 to be approved to inspect, test, certify, repair, or rebuild a cylinder in accordance with a DOT specification or a UN pressure receptacle under subpart C of part 178 or subpart C of part 180, or under the terms of a special permit issued under this part.

How to Apply for a RIN Number (Repair and/or Rebuild)

Procedures and Applications 

Each applicant must arrange for an independent inspection agency, approved by the Associate Administrator, to perform a review of its inspection or requalification operation. The person seeking approval must bear the cost of the inspection. If the inspection performed by an independent inspection agency is completed with satisfactory results, the applicant must submit a letter of recommendation from the independent inspection agency, an inspection report, and an application containing the information prescribed in Section 107.705(a) and 107.805(c)(1)(2)(3)(4). Applications are attached below for your convenience. 

49 CFR References sites for Cylinder Requalifiers

• 107.805
• 180.211
• 180.212