In addition to Sec. 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........................ Sec. 179.400-5... Sec. 179.400-5.Impact test (weld and plate Sec. 179.400-5(c) Sec. 179.400-5(c)
material). .Impact test values.............. Sec. 179.400-5(d) Sec. 179.400-5(d)
.Standard heat transfer rate.
(Btu per day per lb. of water 0.097............. 0.4121.
capacity, max.) (see Sec.
179.400-4).Bursting pressure, min. psig.... 240............... 300.Minimum plate thickness shell, \3/16\............ \3/16\.
inches (see Sec. 179.400-7(a)).Minimum head thickness, inches \3/16\............ \3/16\.
(see Sec. 179.400-8 (a), (b),
and (c)).Test pressure, psig (see Sec. 60................ 120.
179.400-16).Safety vent bursting pressure, 60................ 120.
max. psig.Pressure relief valve start-to- 30................ 75.
discharge pressure, psig ([3
psi).Pressure relief valve vapor 24................ 60.
tight pressure, min. psig.Pressure relief valve flow 40................ 85.
rating pressure, max. psig.
Alternate pressure relief valve .................. 90.
start to-discharge pressure,
psig ([3 psi).Alternate pressure relief valve .................. 72.
vapor tight pressure, min. psig.Alternate pressure relief valve .................. 100.
flow rating pressure, max. psig.Pressure control valve Start-to- 17................ Not required.
vent, max. psig (see Sec.
179.400-20(c)(4)).Relief device discharge Sec. 179.400-20.. 179.400-20.
restrictions.Transfer line insulation........ Sec. 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]