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§ 179.401-1 Individual specification requirements.

49 CFR 179.401-1

  1. CFR
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  3. Title 49
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  5. Subtitle B
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  7. Chapter I
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  9. Part 179
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  11. Subpart F
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  13. 49 CFR 179.401-1
Citation49 CFR 179.401-1
CorpusDaily eCFR
Displayed edition2026-05-18
Last updated2026-05-18

§ 179.401-1 Individual specification requirements.

In addition to § 179.400, the individual specification requirements for the inner tank and its appurtenances are as follows:

DOT specification113A60W113C120W
Design service temperature, °F−423−260.
Material§ 179.400-5§ 179.400-5.
Impact test (weld and plate material)§ 179.400-5(c)§ 179.400-5(c).
Impact test values§ 179.400-5(d)§ 179.400-5(d).
Standard heat transfer rate.
(Btu per day per lb. of water capacity, max.) (see § 179.400-4)0.0970.4121.
Bursting pressure, min. psig240300.
Minimum plate thickness shell, inches (see § 179.400-7(a))3⁄163⁄16.
Minimum head thickness, inches (see § 179.400-8 (a), (b), and (c))3⁄163⁄16.
Test pressure, psig (see § 179.400-16)60120.
Safety vent bursting pressure, max. psig60120.
Pressure relief valve start-to-discharge pressure, psig (±3 psi)3075.
Pressure relief valve vapor tight pressure, min. psig2460.
Pressure relief valve flow rating pressure, max. psig4085.
Alternate pressure relief valve start to-discharge pressure, psig (±3 psi)90.
Alternate pressure relief valve vapor tight pressure, min. psig72.
Alternate pressure relief valve flow rating pressure, max. psig100.
Pressure control valve Start-to-vent, max. psig (see § 179.400-20(c)(4))17Not required.
Relief device discharge restrictions§ 179.400-20179.400-20.
Transfer line insulation§ 179.400-17Not required.

[Amdt. 179-32, 48 FR 27708, June 16, 1983, as amended at 49 FR 24318, June 12, 1984; 65 FR 58632, Sept. 29, 2000; 66 FR 45390, Aug. 28, 2001]