ADR portable tank provision TP21
Shell at least 8 mm thick; hydraulic test and internal inspection at least every 2.5 years.
The shell thickness must be 8 mm or more, and the tank must be hydraulically tested and inspected internally at intervals of no more than 2.5 years.
| Value | Applies when |
|---|---|
| 8 mm | minimum shell thickness |
| 2.5 years | maximum interval for hydraulic test and internal inspection |
Note. On page 201 the TP19–TP33 codes are printed in a column separate from their texts; texts were matched to codes in printed order (15 codes, 15 texts).
Carried by 2 Table A entries
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 4.2.5.3, TP21, page 201.
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.