[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR180.403]

[Page 1071-1072]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 180_CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS--Table of 
Contents
 
         Subpart E_Qualification and Maintenance of Cargo Tanks
 
Sec.  180.403  Definitions.

    In addition to the definitions contained in Sec. Sec.  171.8, 
178.320(a) and 178.345-1 of this subchapter, the following definitions 
apply to this subpart:
    Corroded or abraded means any visible reduction in the material 
thickness of the cargo tank wall or valve due to pitting, flaking, 
gouging, or chemical reaction to the material surface that effects the 
safety or serviceability of the cargo tank. The term does not include 
cosmetic or minor surface degradation that does not effect the safety or 
serviceability of the cargo tank
    Corrosive to the tank or valve means that the lading has been shown 
through experience or test data to reduce the thickness of the material 
of construction of the tank wall or valve.
    Delivery hose assembly means a liquid delivery hose and its attached 
couplings.
    Modification means any change to the original design and 
construction of a cargo tank or a cargo tank motor vehicle that affects 
its structural integrity or lading retention capability including 
changes to equipment certified as part of an emergency discharge control 
system required by Sec.  173.315(n)(2) of this subchapter. Any 
modification that involves welding on the cargo tank wall

[[Page 1072]]

must also meet all requirements for ``Repair'' as defined in this 
section. Excluded from this category are the following:
    (1) A change to motor vehicle equipment such as lights, truck or 
tractor power train components, steering and brake systems, and 
suspension parts, and changes to appurtenances, such as fender 
attachments, lighting brackets, ladder brackets; and
    (2) Replacement of components such as valves, vents, and fittings 
with a component of a similar design and of the same size.
    Owner means the person who owns a cargo tank motor vehicle used for 
the transportation of hazardous materials, or that person's authorized 
agent.
    Piping system means any component of a cargo tank delivery system, 
other than a delivery hose assembly, that contains product during 
loading or unloading.
    Rebarrelling means replacing more than 50 percent of the combined 
shell and head material of a cargo tank.
    Repair means any welding on a cargo tank wall done to return a cargo 
tank or a cargo tank motor vehicle to its original design and 
construction specification, or to a condition prescribed for a later 
equivalent specification in effect at the time of the repair. Excluded 
from this category are the following:
    (1) A change to motor vehicle equipment such as lights, truck or 
tractor power train components, steering and brake systems, and 
suspension parts, and changes to appurtenances, such as fender 
attachments, lighting brackets, ladder brackets; and
    (2) Replacement of components such as valves, vents, and fittings 
with a component of a similar design and of the same size.
    (3) Replacement of an appurtenance by welding to a mounting pad.
    Replacement of a barrel means to replace the existing tank on a 
motor vehicle chassis with an unused (new) tank. For the definition of 
tank, see Sec.  178.345-1(c), Sec.  178.337-1, or Sec.  178.338-1 of 
this subchapter, as applicable.
    Stretching means any change in length, width or diameter of the 
cargo tank, or any change to a cargo tank motor vehicle's undercarriage 
that may affect the cargo tank's structural integrity.

[Amdt. 180-2, 54 FR 25032, June 12, 1989, as amended at 55 FR 37065, 
Sept. 7, 1990; Amdt. 180-3, 57 FR 45466, Oct. 1, 1992; Amdt. 180-7, 59 
FR 55177, Nov. 3, 1994; 60 FR 17402, Apr. 5, 1995; Amdt. 180-10, 61 FR 
51342, Oct. 1, 1996; 63 FR 52850, Oct. 1, 1998; 64 FR 28050, May 24, 
1999; 68 FR 19286, Apr. 18, 2003]