ADR packing instruction P401
Heading in ADR: “P401 PACKING INSTRUCTION”
Steel pressure receptacles tested at 6 bar with inert gas blanket, or combination packagings with threaded inners of max 1 l and 30 kg per outer.
Two options. (1) Steel pressure receptacles meeting 4.1.3.6, tested initially and every 10 years at 0.6 MPa (6 bar gauge) or more, with the liquid under an inert gas blanket of at least 20 kPa (0.2 bar) gauge. (2) Combination packagings: drums, boxes or jerricans of the listed types with glass, metal or plastics inners with threaded closures of up to 1 litre, each surrounded by inert cushioning and absorbent material able to take the whole contents, and no more than 30 kg net per outer. General rules 4.1.1 and 4.1.3 apply.
| Value | Applies when |
|---|---|
| 6 bar | minimum test pressure of steel pressure receptacles (0.6 MPa gauge) |
| 0.2 bar | minimum inert gas blanket gauge pressure |
| 1 l | maximum inner packaging capacity |
| 30 kg | maximum net mass per outer packaging |
| Type | Code | Packing groups | Max capacity (L) | Max net mass (kg) |
|---|---|---|---|---|
| steel pressure receptacles — inner: subject to 4.1.3.6 | — | — | — | — |
| combination: drums — inner: glass, metal or plastics with threaded closures, max 1 l | 1A1, 1A2, 1B1, 1B2, 1N1, 1N2, 1H1, 1H2, 1D, 1G | — | — | 30 |
| combination: boxes — inner: glass, metal or plastics with threaded closures, max 1 l | 4A, 4B, 4N, 4C1, 4C2, 4D, 4F, 4G, 4H1, 4H2 | — | — | 30 |
| combination: jerricans — inner: glass, metal or plastics with threaded closures, max 1 l | 3A1, 3A2, 3B1, 3B2, 3H1, 3H2 | — | — | 30 |
| special packing provisions referenced | RR7 |
|---|
Refers to: 4.1.1; 4.1.3; 4.1.3.6.
Carried by 5 Table A entries
UN 1183 · UN 1242 · UN 1295 · UN 2965 · UN 2988
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 4.1.4.1, P401, page 108.
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.