49 C.F.R. § 180.212 Repair of DOT–3 series specification cylinders.
Title 49 - Transportation
Link to an amendment published at 71 FR 33895, June 12, 2006. (a) General requirements for repair of DOT 3 series cylinders. (1) No person may repair a DOT 3-series cylinder unless— (i) The repair facility holds an approval issued under the provisions of subpart I of part 107 of subchapter A of this chapter; and (ii) Except as provided in paragraph (b) of this section, the repair and the inspection are performed under the provisions of an approval issued under subpart H of part 107 of subchapter A of this chapter and conform to the applicable cylinder specification contained in Part 178 of this subchapter. (2) The person performing the repair must prepare a report containing, at a minimum, the results prescribed in §180.215. (b) Repairs not requiring prior approval. Approval is not required for the following specific repairs: (1) The removal and replacement of a neck ring or foot ring on a DOT 3A, 3AA, or 3B cylinder that does not affect a pressure part of the cylinder when the repair is performed by a repair facility or a cylinder manufacturer of these types of cylinders. The repair may be made by welding or brazing in conformance with the original specification. After removal and before replacement, the cylinder must be visually inspected and any defective cylinder must be rejected. The heat treatment, testing and inspection of the repair must be performed under the supervision of an inspector and in accordance with the original specification. (2) External re-threading of a DOT 3AX, 3AAX or 3T cylinder or internal re-threading of a DOT–3 series cylinder to restore the total number of neck threads engaged to the condition specified in the applicable specification. The repair work must be performed by a manufacturer of these types of cylinders. Upon completion of the re-threading, the threaded opening must be inspected by an independent inspection agency and gauged in accordance with Federal Standard H–28 or an equivalent standard containing the same specification limits. The re-threaded cylinder must be stamped clearly and legibly with the word “RETHREAD” on the shoulder, head, or neck. No cylinder may be re-threaded more than one time without approval of the Associate Administrator. [70 FR 34077, June 13, 2005]
Title 49: Transportation
PART 180—CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS
Subpart C—Qualification, Maintenance and Use of Cylinders
§ 180.212 Repair of DOT–3 series specification cylinders.
