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. |
source: 29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.
cite as: 49 CFR 179.401-1