View all text of Subpart F [§ 179.400 - § 179.500-18]
§ 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 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. |
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