[Code of Federal Regulations]

[Title 49, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR180.212]



[Page 1096-1097]

 

                        TITLE 49--TRANSPORTATION

 

   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 

                      DEPARTMENT OF TRANSPORTATION

 

PART 180_CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS

--Table of Contents

 

        Subpart C_Qualification, Maintenance and Use of Cylinders

 

Sec. 180.212  Repair of DOT-3 series specification cylinders.



    (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 Sec. 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



[[Page 1097]]



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]