ADR special packing provision B18
UN 3531 and 3533 IBCs must be built to vent gas or vapour so pressure cannot burst them if stabilization fails.
For UN 3531 and 3533 under IBC07, the IBC design must allow gas or vapour to escape, so that a pressure rise after loss of stabilization cannot rupture the IBC.
Note. Appears only in IBC07. Same effect as B19 (IBC03) and PP92 (packagings, P002).
Carried by 2 Table A entries
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 4.1.4.2, IBC07, B18, page 149.
Paraphrase in FreightUtils' own words, not the official text. Not yet reviewed.
ADR 2027 amendments (accepted, applying from 1 January 2027) are not yet reflected on this page.