Portable tank instruction T9:
Minimum test pressure: 4 bar
Minimum shell thickness: 6 mm
Pressure-relief requirements: Normal
Bottom opening requirements: Prohibited for liquids.
Portable tank instruction T13:
Minimum test pressure: 6 bar
Minimum shell thickness: 6 mm
Pressure-relief requirements: Normal
Bottom opening requirements: Prohibited
Portable tank instruction T17:
Minimum test pressure: 10 bar
Minimum shell thickness: 6 mm
Pressure-relief requirements: Normal
Bottom opening requirements: § 178.275(d)(3)
Portable tank instruction T21:
Minimum test pressure: 10 bar
Minimum shell thickness: 10 mm
Pressure-relief requirements: Normal
Bottom opening requirements: Prohibited for liquids. § 178.275(d)(2).
When portable tank instruction T50 is indicated in Column (7) of the § 172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of § 173.313 of this subchapter.
When portable tank instruction T75 is referenced in Column (7) of the § 172.101 Table, the applicable refrigerated liquefied gases are authorized to be transported in portable tanks in accordance with the requirements of § 178.277 of this subchapter.