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.

[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]