See 4.2.5.2.6, T23 - Portable tank instruction -

T23

This portable tank instruction applies to self-reactive substances of class 4.1 and organic peroxides of class 5.2. The general provisions of 4.2.1 and the provisions of 6.7.2 shall be met. The provisions specific to self-reactive substances of class 4.1 and organic peroxides of class 5.2 in 4.2.1.13 shall also be met.

Minimum test pressure (bar): 4

Minimum shell thickness (in mm - reference steel): see 6.7.2.4.2

Bottom opening provisions: see 6.7.2.6.3

Pressure-relief provisions (see 6.7.2.8): see 6.7.2.8.2, 4.2.1.13.6, 4.2.1.13.7, 4.2.1.13.8

Degree of filling: see 4.2.1.13.13