[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR180.411]

[Page 1153-1154]
 
                        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 E_Qualification and Maintenance of Cargo Tanks
 
Sec.  180.411  Acceptable results of tests and inspections.

    (a) Corroded or abraded areas. The minimum thickness may not be less 
than that prescribed in the applicable specification.
    (b) Dents, cuts, digs and gouges. For evaluation procedures, see CGA 
C-6 (IBR, see Sec.  171.7 of this subchapter).
    (1) For dents at welds or that include a weld, the maximum allowable 
depth is \1/2\ inch. For dents away from welds, the maximum allowable 
depth is \1/10\ of the greatest dimension of the dent, but in no case 
may the depth exceed one inch.
    (2) The minimum thickness remaining beneath a cut, dig, or gouge may 
not be less than that prescribed in the applicable specification.
    (c) Weld or structural defects. Any cargo tank with a weld defect 
such as a crack, pinhole, or incomplete fusion, or a structural defect 
must be taken out of hazardous materials service until repaired.
    (d) Leakage. All sources of leakage must be properly repaired prior 
to returning a tank to hazardous materials service.

[[Page 1154]]

    (e) Relief valves. Any pressure relief valve that fails to open and 
reclose at the prescribed pressure must be repaired or replaced.
    (f) Liner integrity. Any defect shown by the test must be properly 
repaired.
    (g) Pressure test. Any tank that fails to meet the acceptance 
criteria found in the individual specification that applies must be 
properly repaired.

[Amdt. 180-2, 54 FR 25032, June 12, 1989, as amended at 68 FR 75764, 
Dec. 31, 2003]