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49 CFR Ch. I (10–1–14 Edition) § 180.209

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49 CFR Ch. I (10–1–14 Edition) § 180.209 § 180.209 49 CFR Ch. I (10–1–14 Edition) (IBR, see § 171.7 of this subchapter). shell must be performed at least once However, UN cylinders with a tensile every ten years. strength greater than or equal to 950 (4) Composite UN cylinders: Each MPa must be requalified by ultrasonic composite cylinder must be inspected examination in accordance with ISO and tested in accordance with ISO 11623 6406. (IBR, see § 171.7 of this subchapter). (2) Seamless UN aluminum: Each [71 FR 33894, June 12, 2006, as amended at 71 seamless aluminum UN pressure recep- FR 54397, Sept. 14, 2006; 76 FR 3389, Jan.19, tacle must be requalified in accordance 2011] with ISO 10461 (IBR, see § 171.7 of this subchapter). § 180.209 Requirements for requalifica- tion of specification cylinders. (3) Dissolved acetylene UN cylinders: Each dissolved acetylene cylinder must (a) Periodic qualification of cylinders. be requalified in accordance with ISO Each specification cylinder that be- comes due for periodic requalification, 10462 (IBR, see § 171.7 of this sub- as specified in the following table, chapter). The porous mass and the must be requalified and marked in con- shell must be requalified no sooner formance with the requirements of this than 3 years, 6 months, from the date subpart. Requalification records must of manufacture. Thereafter, subsequent be maintained in accordance with requalifications of the porous mass and § 180.215. Table 1 follows: TABLE 1—REQUALIFICATION OF CYLINDERS 1 Specification under which cylinder was Minimum test pressure Requalification period made (psig) 2 (years) DOT 3 ........................................................ 3000 psig ................................................. 5 DOT 3A, 3AA ............................................ 5/3 times service pressure, except non- 5, 10, or 12 (see § 180.209(b), (f), (h), corrosive service (see § 180.209(g)). and (j) DOT 3AL ................................................... 5/3 times service pressure ...................... 5 or 12 (see § 180.209(j) and § 180.209(m) 3 ). DOT 3AX, 3AAX ........................................ 5/3 times service pressure ...................... 5 3B, 3BN..................................................... 2 times service pressure (see 5 or 10 (see § 180.209(f)) § 180.209(g)). 3E .............................................................. Test not required. 3HT ............................................................ 5/3 times service pressure ...................... 3 (see §§ 180.209(k) and 180.213(c)) 3T .............................................................. 5/3 times service pressure ...................... 5 4AA480 ...................................................... 2 times service pressure (see 5 or 10 (see § 180.209(h)) § 180.209(g)). 4B, 4BA, 4BW, 4B–240ET ........................ 2 times service pressure, except non- 5, 10, or 12 (see § 180.209(e), (f), and corrosive service (see § 180.209(g)). (j)) 4D, 4DA, 4DS ............................................ 2 times service ........................................ 5 DOT 4E ..................................................... 2 times service pressure, except non- 5 corrosive (see § 180.209(g)). 4L ............................................................... Test not required. 8, 8AL ........................................................ .................................................................. 10 or 20 (see § 180.209(i)) Exemption or special permit cylinder ........ See current exemption or special permit See current exemption or special permit Foreign cylinder (see § 173.301(j) of this As marked on cylinder, but not less than 5 (see §§ 180.209(l) and 180.213(d)(2)) subchapter for restrictions on use). 5⁄3 of 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 § 173.301a(b) of this subchapter. (b) DOT 3A or 3AA cylinders. (1) A cyl- (i) The cylinder was manufactured inder conforming to specification DOT after December 31, 1945. 3A or 3AA with a water capacity of 56.7 (ii) The cylinder is used exclusively kg (125 lb) or less that is removed from for air; argon; cyclopropane; ethylene; any cluster, bank, group, rack, or vehi- helium; hydrogen; krypton; neon; ni- cle each time it is filled, may be re- trogen; nitrous oxide; oxygen; sulfur qualified every ten years instead of hexafluoride; xenon; chlorinated hydro- every five years, provided the cylinder carbons, fluorinated hydrocarbons, liq- conforms to all of the following condi- uefied hydrocarbons, and mixtures tions: thereof that are commercially free 320 VerDate Sep<11>2014 11:31 Jan 21, 2015 Jkt 232221 PO 00000 Frm 00330 Fmt 8010 Sfmt 8010 Y:\SGML\232221.XXX 232221 wreier-aviles on DSK4TPTVN1PROD with CFR Pipeline and Hazardous Materials Safety Administration, DOT § 180.209 from corroding components; permitted weight must be recorded as the new mixtures of these gases (see § 173.301(d) tare weight. of this subchapter); and permitted mix- (d) Cylinders 5.44 kg (12 lb) or less with tures of these gases with up to 30 per- service pressures of 300 psig or less. A cyl- cent by volume of carbon dioxide, pro- inder of 5.44 (12 lb) or less water capac- vided the gas has a dew point at or ity authorized for service pressure of below minus (52 °F) at 1 atmosphere. 300 psig or less must be given a com- (iii) Before each refill, the cylinder is plete external visual inspection at the removed from any cluster, bank, group, time periodic requalification becomes rack or vehicle and passes the hammer due. External visual inspection must be test specified in CGA Pamphlet C–6 in accordance with CGA Pamphlet C–6 (IBR, see § 171.7 of this subchapter). or C–6.1 (IBR, see § 171.7 of this sub- (iv) The cylinder is dried imme- chapter). The cylinder may be proof diately after hydrostatic testing to re- pressure tested. The test is successful move all traces of water. if the cylinder, when examined under (v) The cylinder is not used for un- test pressure, does not display a defect derwater breathing. described in § 180.205(i)(1) (ii) or (iii). Upon successful completion of the test (vi) Each cylinder is stamped with a and inspection, the cylinder must be five-pointed star at least one-fourth of marked in accordance with § 180.213. an inch high immediately following the (e) Proof pressure test A cylinder made test date. in conformance with specifications (2) If, since the last required requali- DOT 4B, 4BA, 4BW, or 4E used exclu- fication, a cylinder has not been used sively for: liquefied petroleum gas that exclusively for the gases specifically meets the detail requirement limits in identified in paragraph (b)(1)(ii) of this Table I of ASTM D 1835, ‘‘Standard section, but currently conforms with Specification for Liquefied Petroleum all other provisions of paragraph (b)(1) (LP) Gases’’ (IBR see § 171.7 of this sub- of this section, it may be requalified chapter) or an equivalent standard con- every 10 years instead of every five taining the same limits; anhydrous di- years, provided it is first requalified methylamine; anhydrous methylamine; and examined as prescribed by anhydrous trimethylamine; methyl § 173.302a(b) (2), (3) and (4) of this sub- chloride; methylacetylene-propadiene chapter. stabilized; or dichlorodifluoromethane, (3) Except as specified in paragraph difluoroethane, difluorochloroethane, (b)(2) of this section, if a cylinder, chlorodifluoromethane, marked with a star, is filled with a chlorotetrafluoroethane, compressed gas other than as specified trifluorochloroethylene, or mixture in paragraph (b)(1)(ii) of this section, thereof, or mixtures of one or more the star following the most recent test with trichlorofluoromethane; and com- date must be obliterated. The cylinder mercially free from corroding compo- must be requalified five years from the nents and protected externally by a marked test date, or prior to the first suitable corrosion-resistant coating filling with a compressed gas, if the re- (such as galvanizing or painting) may quired five-year requalification period be requalified by volumetric expansion has passed. testing every 12 years instead of every (c) DOT 4-series cylinders. A DOT 4-se- five years. As an alternative, the cyl- ries cylinder, except a 4L cylinder, that inder may be subjected to a proof pres- at any time shows evidence of a leak or sure test at least two times the marked of internal or external corrosion, dent- service pressure, but this latter type of ing, bulging or rough usage to the ex- test must be repeated every seven tent that it is likely to be weakened years after expiration of the first 12- appreciably, or that has lost five per- year period. When subjected to a proof cent or more of its official tare weight pressure test, the cylinder must be must be requalified before being re- carefully examined under test pressure filled and offered for transportation. and removed from service if a leak or (Refer to CGA Pamphlet C–6 or C–6.3, defect is found. as applicable, regarding cylinder weak- (f) Poisonous materials. A cylinder ening.) After testing, the actual tare conforming to specification DOT 3A, 321 VerDate Sep<11>2014 11:31 Jan 21, 2015 Jkt 232221 PO 00000 Frm 00331 Fmt 8010 Sfmt 8010 Y:\SGML\232221.XXX 232221 wreier-aviles on DSK4TPTVN1PROD with CFR § 180.209 49 CFR Ch. I (10–1–14 Edition) 3AA, 3B, 4BA, or 4BW having a service fication becomes due. External visual pressure of 300 psig or less
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