[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR180.209]
[Page 1051-1054]
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 C--Qualification, Maintenance and Use of Cylinders
Sec. 180.209 Requirements for requalification of specification cylinders.
(a) Periodic qualification of cylinders. (1) Each specification
cylinder that becomes due for periodic requalification, as specified in
the following table, must be requalified and marked in conformance with
the requirements of this subpart. Requalification records must be
maintained in accordance with Sec. 180.215. Table 1 follows:
Table 1.--Requalification of Cylinders \1\
------------------------------------------------------------------------
Specification under which Minimum test
cylinder was made pressure (psig) \2\ Test period (years)
------------------------------------------------------------------------
DOT 3....................... 3000 psig........... 5
DOT 3A, 3AA................. 5/3 times service 5, 10, or 12 (see
pressure, except Sec. 180.209(b),
noncorrosive (f), (h), and (j)
service (see Sec.
180.209(g)).
DOT 3AL..................... 5/3 times service 5 or 12 (see Sec.
pressure. 180.209(j))
DOT 3AX, 3AAX............... 5/3 times service 5
pressure.
3B, 3BN..................... 2 times service 5 or 10 (see Sec.
pressure (see Sec. 180.209(f))
180.209(g)).
3E.......................... Test not required...
3HT......................... 5/3 times service 3 (see Secs.
pressure. 180.209(i) and
180.213(c))
3T.......................... 5/3 times service 5
pressure.
4AA480...................... 2 times service 5 or 10 (see Sec.
pressure (see Sec. 180.209(e)(14)
180.209(g)).
4B, 4BA, 4BW, 4B-240ET...... 2 times service 5, 10, or 12 (see
pressure, except Sec. 180.209(e),
non-corrosive (f), and (j))
service (see Sec.
180.209(g)).
4D, 4DA, 4DS................ 2 times service..... 5
DOT 4E...................... 2 times service 5
pressure, except
non-corrosive (see
Sec. 180.209(g)).
4L.......................... Test not required...
8, 8AL...................... .................... 10 or 20 (see Sec.
180.209(i))
Special Permit cylinder.......... See current See current
special permit. special permit
Foreign cylinder (see Sec. As marked on 5 (see Secs.
173.301(j) of this cylinder, but not 180.209(KB) and
subchapter for restrictions less than 5/3 of 180.213(d)(iii))
on use). any service or
working pressure
marking.
------------------------------------------------------------------------
\1\ Any cylinder not exceeding 2 inches outside diameter and less than 2
feet in length is excepted from volumetric expansion test.
\2\ For cylinders not marked with a service pressure, see Sec.
173.301(e)(1) of this subchapter.
(b) DOT 3A or 3AA cylinders. (1) A cylinder conforming to
specification DOT 3A or 3AA with a water capacity of 56.7 kg (125 lb) or
less that is removed from
[[Page 1052]]
any cluster, bank, group, rack, or vehicle each time it is filled, may
be requalified every ten years instead of every five years, provided the
cylinder conforms to all of the following conditions:
(i) The cylinder was manufactured after December 31, 1945.
(ii) The cylinder is used exclusively for air; argon; cyclopropane;
ethylene; helium; hydrogen; krypton; neon; nitrogen; nitrous oxide;
oxygen; sulfur hexafluoride; xenon; fluorinated hydrocarbons, liquefied
hydrocarbons, and mixtures thereof that are commercially free from
corroding components; permitted mixtures of these gases (see
Sec. 173.301(d) of this subchapter); and permitted mixtures of these
gases with up to 30 percent by volume of carbon dioxide, provided the
gas has a dew point at or below minus (52 deg.F) at 1 atmosphere.
(iii) Before each refill, the cylinder is removed from any cluster,
bank, group, rack or vehicle and passes the hammer test specified in CGA
Pamphlet C-6 (incorporated by reference; see Sec. 171.7 of this
subchapter).
(iv) The cylinder is dried immediately after hydrostatic testing to
remove all traces of water.
(v) The cylinder is not used for underwater breathing.
(vi) Each cylinder is stamped with a five-pointed star at least one-
fourth of an inch high immediately following the test date.
(2) If, since the last required requalification, a cylinder has not
been used exclusively for the gases specifically identified in paragraph
(b)(1)(ii) of this section, but currently conforms with all other
provisions of paragraph (b)(1) of this section, it may be requalified
every 10 years instead of every five years, provided it is first
requalified and examined as prescribed by Sec. 173.302a(b) (2), (3) and
(4) of this subchapter.
(3) Except as specified in paragraph (b)(2) of this section, if a
cylinder, marked with a star, is filled with a compressed gas other than
as specified in paragraph (b)(1)(ii) of this section, the star following
the most recent test date must be obliterated. The cylinder must be
requalified five years from the marked test date, or prior to the first
filling with a compressed gas, if the required five-year requalification
period has passed.
(c) DOT 4-series cylinders. A DOT 4-series cylinder, except a 4L
cylinder, that at any time shows evidence of a leak or of internal or
external corrosion, denting, bulging or rough usage to the extent that
it is likely to be weakened appreciably, or that has lost five percent
or more of its official tare weight must be requalified before being
refilled and offered for transportation. (Refer to CGA Pamphlet C-6 or
C-6.3, as applicable, regarding cylinder weakening.) After testing, the
actual tare weight must be recorded as the new tare weight.
(d) Cylinders 5.44 kg (12 lb) or less with service pressures of 300
psig or less. A cylinder of 5.44 (12 lb) or less water capacity
authorized for service pressure of 300 psig or less must be given a
complete external visual inspection at the time periodic requalification
becomes due. External visual inspection must be in accordance with CGA
Pamphlet C-6 or C-6.1 (incorporated by reference; see Sec. 171.7 of this
subchapter). The cylinder may be proof pressure tested. The test is
successful if the cylinder, when examined under test pressure, does not
display a defect described in Sec. 180.205(i)(1) (ii) or (iii). Upon
successful completion of the test and inspection, the cylinder must be
marked in accordance with Sec. 180.213.
(e) Proof pressure test. A cylinder made in conformance with
specifications DOT 4B, 4BA, 4BW, or 4E used exclusively for: liquefied
petroleum gas that meets the requirements in Table I of ASTM D 1835,
Standard Specification for Liquefied Petroleum (LP) Gases (incorporated
by reference; see Sec. 171.7 of this subchapter); anhydrous
dimethylamine; anhydrous methylamine; anhydrous trimethylamine; methyl
chloride; methylacetylene-propadiene stabilized; or
dichlorodifluoromethane, difluoroethane, difluorochloroethane,
chlorodifluoromethane, chlorotetrafluoroethane, trifluorochloroethylene,
or mixture thereof, or mixtures of one or more with
trichlorofluoromethane; and commercially free from corroding components
and protected externally by a suitable corrosion-resistant coating
[[Page 1053]]
(such as galvanizing or painting) may be requalified by volumetric
expansion testing every 12 years instead of every five years. As an
alternative, the cylinder may be subjected to a proof pressure test at
least two times the marked service pressure, but this latter type of
test must be repeated every seven years after expiration of the first
12-year period. When subjected to a proof pressure test, the cylinder
must be carefully examined under test pressure and removed from service
if a leak or defect is found.
(f) Poisonous materials. A cylinder conforming to specification DOT
3A, 3AA, 3B, 4BA, or 4BW having a service pressure of 300 psig or less
and used exclusively for methyl bromide, liquid; mixtures of methyl
bromide and ethylene dibromide, liquid; mixtures of methyl bromide and
chlorpicrin, liquid; mixtures of methyl bromide and petroleum solvents,
liquid; or methyl bromide and nonflammable, nonliquefied compressed gas
mixtures, liquid; commercially free of corroding components, and
protected externally by a suitable corrosion resistant coating (such as
galvanizing or painting) and internally by a suitable corrosion
resistant lining (such as galvanizing) may be tested every 10 years
instead of every five years, provided a visual internal and external
examination of the cylinder is conducted every five years in accordance
with CGA Pamphlet C-6 (incorporated by reference; see Sec. 171.7 of this
subchapter). The cylinder must be examined at each filling, and rejected
if a dent, corroded area, leak or other condition indicates possible
weakness.
(g) Visual inspections. A cylinder conforming to a specification
listed in the table in this paragraph and used exclusively in the
service indicated may, instead of a periodic hydrostatic test, be given
a complete external visual inspection at the time periodic
requalification becomes due. External visual inspection must be in
accordance with CGA Pamphlet C-6 or C-6.3, as applicable (incorporated
by reference; see Sec. 171.7 of this subchapter). When this inspection
is used instead of hydrostatic pressure testing, subsequent inspections
are required at five-year intervals after the first inspection. After
September 30, 2003, inspections must be made only by persons holding a
current RIN and the results recorded and maintained in accordance with
Sec. 180.215. Records must include: date of inspection (month and year);
DOT specification number; cylinder identification (registered symbol and
serial number, date of manufacture, and owner); type of cylinder
protective coating (including statement as to need of refinishing or
recoating); conditions checked (e.g., leakage, corrosion, gouges, dents
or digs in shell or heads, broken or damaged footring or protective ring
or fire damage); disposition of cylinder (returned to service, returned
to cylinder manufacturer for repairs or condemned). A cylinder passing
requalification by the external visual inspection must be marked in
accordance with Sec. 180.213. Specification cylinders must be in
exclusive service as shown in the following table:
------------------------------------------------------------------------
Cylinders conforming to-- Used exclusively for--
------------------------------------------------------------------------
DOT 3A, DOT 3AA, DOT 3A480X, DOT 4AA480 Anhydrous ammonia of at least
99.95% purity.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Butadiene, inhibited, that is
DOT 4B, DOT 4BA, DOT 4BW. commercially free from
corroding components.
DOT 3A, DOT 3A480X, DOT 3AA, DOT 3B, Cyclopropane that is
DOT 4AA480, DOT 4B, DOT 4BA, DOT 4BW. commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 4B, Fluorinated hydrocarbons and
DOT 4BA, DOT 4BW, DOT 4E. mixtures thereof that are
commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Liquefied hydrocarbon gas that
DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. is commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Liquefied petroleum gas that
DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. meets the requirements in
Table I of ASTM D 1835,
Standard Specification for
Liquefied Petroleum (LP) Gases
(incorporated by reference;
see Sec. 171.7 of this
subchapter).
DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT Methylacetylene-propadiene,
4BA, DOT 4BW, DOT 4E. stabilized, that is
commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT Anhydrous mono,
4BA, DOT 4BW. di,trimethylamines that are
commercially free from
corroding components.
DOT 4B240, DOT 4BW240.................. Ethyleneimine, inhibited.
------------------------------------------------------------------------
[[Page 1054]]
(h) Cylinders containing anhydrous ammonia. A cylinder conforming to
specification DOT 3A, 3A480X, or 4AA480 used exclusively for anhydrous
ammonia, commercially free from corroding components, and protected
externally by a suitable corrosion-resistant coating (such as paint) may
be requalified every 10 years instead of every five years.
(i) Requalification of DOT-8 series cylinders. (1) Each owner of a
DOT-8 series cylinder used to transport acetylene must have the cylinder
shell and the porous filler requalified in accordance with CGA Pamphlet
C-13 (incorporated by reference; see Sec. 171.7 of this subchapter).
Requalification must be performed in accordance with the following
schedule:
----------------------------------------------------------------------------------------------------------------
Shell (visual inspection) Porous filler requalification
requalification ---------------------------------------
Date of cylinder manufacture ----------------------------------------
Initial Subsequent Initial Subsequent
----------------------------------------------------------------------------------------------------------------
Before January 1, 1991.......... Before January 1, 10 years.......... Before January 1, Not required.
2001. 2011.
On or after January 1, 1991..... 10 years \1\...... 10 years.......... 3 to 20 years \2\. Not required.
----------------------------------------------------------------------------------------------------------------
\1\ Years from date of cylinder manufacture.
\2\ For a cylinder manufactured on or after January 1, 1991, requalification of the porous filler must be
performed no sooner than 3 years, and no later than 20 years, from the date of manufacture.
(2) Unless requalified and marked in accordance with CGA Pamphlet C-
13 (incorporated by reference; see Sec. 171.7 of this subchapter) before
October 1, 1994, an acetylene cylinder must be requalified by a person
who holds a current RIN.
(3) If a cylinder valve is replaced, a cylinder valve of the same
weight must be used or the tare weight of the cylinder must be adjusted
to compensate for valve weight differential.
(4) The person performing a visual inspection or requalification
must record the results as specified in Sec. 180.215.
(5) The person performing a visual inspection or requalification
must mark the cylinder as specified in Sec. 180.213.
(j) Cylinder used as a fire extinguisher. Only a DOT specification
cylinder used as a fire extinguisher and meeting Special Provision 18 in
Sec. 172.102(c)(1) of this subchapter may be requalified in accordance
with this paragraph (j).
(1) A DOT 4B, 4BA, 4B240ET or 4BW cylinder may be tested as follows:
(i) For a cylinder with a water capacity of 5.44 kg (12 lb) or less,
by volumetric expansion test using the water jacket method or by proof
pressure test. A requalification must be performed by the end of 12
years after the original test date and at 12-year intervals thereafter.
(ii) For a cylinder having a water capacity over 5.44 kg (12 lb)--
(A) By proof pressure test. A requalification must be performed by
the end of 12 years after the original test date and at 7-year
intervals; or
(B) By volumetric expansion test using the water jacket method. A
requalification must be performed 12 years after the original test date
and at 12-year intervals thereafter.
(2) A DOT 3A, 3AA, or 3AL cylinder must be requalified by volumetric
expansion test using the water jacket method. A requalification must be
performed 12 years after the original test date and at 12-year intervals
thereafter.
(KB) Requalification of foreign cylinders filled for export. A
cylinder manufactured outside the United States, other than as provided
in Sec. 171.12a of this subchapter, that has not been manufactured,
inspected, tested and marked in accordance with part 178 of this
subchapter may be filled with compressed gas in the United States, and
shipped solely for export if it meets the following requirements, in
addition to other requirements of this subchapter:
(1) It has been inspected, tested and marked (with only the month
and year of test) in conformance with the procedures and requirements of
this subpart or the Associate Administrator has authorized the filling
company to fill foreign cylinders under an alternative method of
qualification; and
(2) It is offered for transportation in conformance with the
requirements of Sec. 173.301(l) of this subchapter.
[[Page 1055]]
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