[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: 49CFR180.511]

[Page 1164-1165]
 
                        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 F_Qualification and Maintenance of Tank Cars
 
Sec.  180.511  Acceptable results of inspections and tests.

    Provided it conforms with other applicable requirements of this 
subchapter, a tank car is qualified for use if it successfully passes 
the following inspections and tests conducted in accordance with this 
subpart:
    (a) Visual inspection. A tank car successfully passes the visual 
inspection when the inspection shows no structural defect that may cause 
leakage from or failure of the tank before the next inspection and test 
interval.
    (b) Structural integrity inspection and test. A tank car 
successfully passes the structural integrity inspection and test when it 
shows no structural defect that may initiate cracks or propagate cracks 
and cause failure of the tank before the next inspection and test 
interval.
    (c) Service life shell thickness. A tank car successfully passes the 
service life shell thickness inspection when the tank shell and heads 
show no thickness reduction below that allowed in Sec.  180.509(g).
    (d) Safety system inspection. A tank car successfully passes the 
safety system inspection when each thermal protection system, tank head 
puncture resistance system, coupler vertical restraint system, and 
system used to protect discontinuities (e.g., breakage grooves on bottom 
outlets and protective housings) on the tank car conform to this 
subchapter.
    (e) Lining and coating inspection. A tank car successfully passes 
the lining and coating inspection and test when the lining or coating 
conforms to the owner's acceptance criteria.
    (f) Leakage pressure test. A tank car successfully passes the 
leakage pressure test when all product piping, fittings and closures 
show no indication of leakage.
    (g) Hydrostatic test. A Class 107 tank car or a riveted tank car 
successfully passes the hydrostatic test when it

[[Page 1165]]

shows no leakage, distortion, excessive permanent expansion, or other 
evidence of weakness that might render the tank car unsafe for 
transportation service.

[Amdt. 180-8, 60 FR 49079, Sept. 21, 1995, as amended by Amdt. 179-50, 
61 FR 33256, June 26, 1996; 66 FR 45187, Aug. 28, 2001]