[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR180.207]

[Page 1120-1122]
 
                        TITLE 49--TRANSPORTATION
 
   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 
                      DEPARTMENT OF TRANSPORTATION
 
PART 180_CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS--Table 
 
        Subpart C_Qualification, Maintenance and Use of Cylinders
 
Sec.  180.207  Requirements for requalification of UN pressure 

receptacles.

    (a) General. (1) Each UN pressure receptacle used for the 
transportation of hazardous materials must conform to

[[Page 1121]]

the requirements prescribed in paragraphs (a), (b) and (d) in Sec.  
180.205.
    (2) No pressure receptacle due for requalification may be filled 
with a hazardous material and offered for transportation in commerce 
unless that pressure receptacle has been successfully requalified and 
marked in accordance with this subpart. A pressure receptacle may be 
requalified at any time during or before the month and year that the 
requalification is due. However, a pressure receptacle filled before the 
requalification becomes due may remain in service until it is emptied.
    (3) No person may requalify a UN composite pressure receptacle for 
continued use beyond its 15-years authorized service life. A pressure 
receptacle with a specified service life may not be refilled and offered 
for transportation after its authorized service life has expired unless 
approval has been obtained in writing from the Associate Administrator.
    (b) Periodic requalification of UN pressure receptacles. (1) Each 
pressure receptacle that is successfully requalified in accordance with 
the requirements specified in this section must be marked in accordance 
with Sec.  180.213. The requalification results must be recorded in 
accordance Sec.  180.215.
    (2) Each pressure receptacle that fails requalification must be 
rejected or condemned in accordance with the applicable ISO 
requalification standard.
    (c) Requalification interval. Each UN pressure receptacle that 
becomes due for periodic requalification must be requalified at the 
interval specified in the following table:

     Table 1.--Requalification Intervals of UN Pressure Receptacles
------------------------------------------------------------------------
      Interval (years)       UN pressure receptacles/hazardous materials
------------------------------------------------------------------------
10.........................  Pressure receptacles for all hazardous
                              materials except as noted below (also for
                              dissolved acetylene, see paragraph (d)(3)
                              of this section):
5..........................  Composite pressure receptacles.
5..........................  Pressure receptacles used for:
                             All Division 2.3 materials.
                             UN1013, Carbon dioxide.
                                UN1043, Fertilizer ammoniating solution
                                 with free ammonia.
                             UN1051, Hydrogen cyanide, stabilized
                              containing less than 3% water.
                             UN1052, Hydrogen fluoride, anhydrous.
                             UN1745, Bromine pentafluoride.
                                UN1746, Bromine trifluoride.
                             UN2073, Ammonia solution.
                             UN2495, Iodine pentafluoride.
                             UN2983, Ethylene Oxide and Propylene oxide
                              mixture, not more than 30% ethylene oxide.
------------------------------------------------------------------------

    (d) Requalification procedures. Each UN pressure receptacle that 
becomes due for requalification must be requalified at the interval 
prescribed in paragraph (c) of this section and in accordance with the 
procedures contained in the following standard, as applicable. When a 
pressure test is performed on a UN pressure receptacle, the test must be 
a water jacket volumetric expansion test suitable for the determination 
of the cylinder expansion or a hydraulic proof pressure test. The test 
equipment must conform to the accuracy requirements in Sec.  180.205(g). 
Alternative methods (e.g., acoustic emission) or requalification 
procedures may be performed if prior approval has been obtained in 
writing from the Associate Administrator.
    (1) Seamless steel: Each seamless steel UN pressure receptacle, 
including MEGC's pressure receptacles, must be requalified in accordance 
with ISO 6406 (IBR, see Sec.  171.7 of this subchapter). However, UN 
cylinders with a tensile strength greater than or equal to 950 MPa must 
be requalified by ultrasonic examination in accordance with ISO 6406.
    (2) Seamless UN aluminum: Each seamless aluminum UN pressure 
receptacle must be requalified in accordance with ISO 10461 (IBR, see 
Sec.  171.7 of this subchapter).
    (3) Dissolved acetylene UN cylinders: Each dissolved acetylene 
cylinder must be requalified in accordance with ISO 10462 (IBR, see 
Sec.  171.7 of this subchapter). The porous mass and the

[[Page 1122]]

shell must be requalified no sooner than 3 years, 6 months, from the 
date of manufacture. Thereafter, subsequent requalifications of the 
porous mass and shell must be performed at least once every ten years.
    (4) Composite UN cylinders: Each composite cylinder must be 
inspected and tested in accordance with ISO 11623 (IBR, see Sec.  171.7 
of this subchapter).

[71 FR 33894, June 12, 2006, as amended at 71 FR 54397, Sept. 14, 2006]