ADR tank special provision TU18
Filling kept low enough that liquid heated to the safety-valve opening pressure would fill no more than 95 % of capacity; 4.3.2.3.4 not applied.
The tank must be filled only to a level such that, if the cargo warmed until its vapour pressure matched the opening pressure of the safety valve, the liquid would then take up less than 95 % of tank capacity at that temperature. The filling provision of 4.3.2.3.4 does not apply.
| Value | Applies when |
|---|---|
| 95 % | liquid volume limit at the temperature where vapour pressure equals the safety-valve opening pressure |
Note. Page 224 prints the codes TU8 to TU20 in a separate column from their texts in the extraction; the text was matched to the code by order (13 codes, 13 text blocks, TU10 and TU20 both reading "(Reserved)").
Refers to: 4.3.2.3.4.
Carried by 6 Table A entries
UN 1038 · UN 1961 · UN 1966 · UN 1972 · UN 3138 · UN 3312
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 4.3.5, TU18, page 224.
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.