# -1 Individual specification requirements.

- **operation:** document
- **citation:** 49 CFR 179.401-1
- **title:** -1 Individual specification requirements.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** In addition to § 179.400, the individual specification requirements for the inner tank and its appurtenances are as follows:

DOT specification 113A60W 113C120W 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-
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- **app url:** https://regulus.evalyn.ai/document/49-cfr-179-401-1
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-179.401-1
**body:**

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

DOT specification 113A60W 113C120W 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) 0.097 0.4121. Bursting pressure, min. psig 240 300. Minimum plate thickness shell, inches (see § 179.400-7(a)) 3⁄16 3⁄16. Minimum head thickness, inches (see § 179.400-8 (a), (b), and (c)) 3⁄16 3⁄16. Test pressure, psig (see § 179.400-16) 60 120. Safety vent bursting pressure, max. psig 60 120. Pressure relief valve start-to-discharge pressure, psig (±3 psi) 30 75. Pressure relief valve vapor tight pressure, min. psig 24 60. Pressure relief valve flow rating pressure, max. psig 40 85. Alternate pressure relief valve start to-discharge pressure, psig (±3 psi) 90. Alternate pressure relief valve vapor tight pressure, min. psig 72. Alternate pressure relief valve flow rating pressure, max. psig 100. Pressure control valve Start-to-vent, max. psig (see § 179.400-20(c)(4)) 17 Not required. Relief device discharge restrictions § 179.400-20 179.400-20. Transfer line insulation § 179.400-17 Not 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]
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