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TM 55-315
as appropriate, to determine compliance with the requirement.
(8) If the maximum normal operating pressure of a package is likely to exceed 0.35 kilogram per square
centimeter (gauge), the internal pressure of the container will not exceed the design pressure.
(9) External radiation and contamination levels are within the allowable limits.
n. No person may offer for transport a package of radioactive materials until the temperature of the packaging
system has reached equilibrium (see also e above) unless, for the specific contents, he has ascertained that the
maximum applicable surface temperature limits cannot be exceeded.
o. No person may offer for transport aboard a passenger-carrying aircraft any radioactive material unless that
material is intended for use in, or incident to, research or medical diagnosis or treatment, or is excepted under the
provisions of 49 CFR 175.10.
4-5. Quality Assurance Requirements (10 CFR 71.101 and 71.137)
Each activity engaged in design, fabrication, assembly, testing, maintenance, or use of packaging shall establish an
approved quality assurance program to be applied to the activity's function(s). Quality assurance program requirements
are further explained in chapter 9.
4-6. Requirements for Specification Containers (49 CFR 173.24)
a. Each specification container must be marked as follows:
(1) In an unobstructed area with letters and numerals identifying the container specification; for example,
DOT-1A, DOT-17E-304HT, or DOT-23G40 (see 49 CFR 178.0-2).
(2) With the name and address or symbol of the person making the mark specified in (1) above. Symbol
letters, if used, must be registered with the Bureau of Explosives. Duplicate symbols are not authorized.
(3) With stamped, embossed, burned, printed, or other markings to provide adequate accessibility,
permanency, and contract so as to be readily apparent and understood.
(4) With at least 1/2-inch-high letters and numeral, unless otherwise specified.
b. Packaging that does not comply with the applicable specifications listed in 49 CFR 178 and 179 must not be
marked to show such compliance (see 49 CFR 178.0-2 and 179.1).
c. For specification containers, compliance with the applicable specifications in 49 CFR 178 and 179 shall be
required in all details, except as otherwise provided in this paragraph.
4-7. Materials Used in Packaging (49 CFR 173.24)
a. Steel used shall be low-carbon, commercial quality. Stainless, open hearth, electric, basic oxygen, or other
similar quality steels are acceptable. Steel sheets of specified gauges shall comply with table 4-1.
b. Lumber used shall be well seasoned, commercially dry, and free from decay, loose knots, knots that would
interfere with nailing, and other defects that would materially lessen the strength.
c. Welding and brazing shall be performed in a workmanlike manner using suitable and appropriate techniques,
materials, and equipment.
d. Packaging materials and contents shall be such that no significant chemical or galvanic reaction will occur
among any of the materials in the package.
e. Closures shall be adequate to prevent inadvertent leakage of the contents under normal transport conditions.
Gasketed closures shall be fitted with gaskets of efficient material that will not be deteriorated by the contents of the
container.
f. Nails, staples, and other metallic devices shall not protrude into the outer packaging in such a manner as to be
likely to cause failures.
g. The nature and thickness of the packaging shall be such that, during transport, friction will not generate any
heat likely to decrease the chemical stability of the contents.
h. The polyethylene used must be of a type compatible with the lading and must not be permeable to an extent
that a hazardous condition could be caused during transport and handling.
Table 4-1. Sheet Steel Dimensions
Nominal thickness
Minimum thickness
Gauge No.
(in.)
(in.)
12
0.1046
0.0946
13
0.0897
0.0817
14
0.0747
0.0677
15
0.0673
0.0603
16
0.0598
0.0533
17
0.0538
0.0478
18
0.0478
0.0428
19
0.0418
0.0378
20
0.0359
0.0324
22
0.0299
0.0269
23
0.0269
0.0239
24
0.0239
0.0209
26
0.0179
0.0159
28
0.0149
0.0129
30
0.0120
0.0110
4-3
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