ADR tank code PxBH(M)
ADR tank code for Class 2 gases: liquefied/dissolved gas tank, X (test pressure from 4.3.3.2.5), openings B, hermetically closed, suffix (M).
PxBH(M) is decoded part by part from the 4.3.3.1.1 table for Class 2 gases. Part 1 "P" is a tank, battery-vehicle or MEGC for liquefied or dissolved gases; part 2 "X" is the minimum relevant test pressure taken from the table in 4.3.3.2.5 for the gas. Part 3 "B" (openings): tank filled or discharged from the bottom through openings having 3 closures; or a battery-vehicle/MEGC with openings below the liquid surface or for compressed gases. Part 4 "H" (safety valves/devices): the tank is hermetically closed (see 1.2.1). The "(M)" after the code means the gas may also go in battery-vehicles or MEGCs. The code gives the least stringent tank accepted; others may be used under the hierarchy in 4.3.3.1.2.
| tank type: P | tank, battery-vehicle or MEGC for liquefied or dissolved gases |
|---|---|
| calculation pressure: X | the minimum relevant test pressure taken from the table in 4.3.3.2.5 for the gas |
| openings: B | tank filled or discharged from the bottom through openings having 3 closures; or a battery-vehicle/MEGC with openings below the liquid surface or for compressed gases |
| safety valves: H | hermetically closed (see 1.2.1) |
| suffix: (M) | the substance may also be carried in battery-vehicles or MEGCs (3.2.1, column (12)) |
Note. Tank codes permitted in place of this one: see the hierarchy in 4.3.3.1.2 (Volume II page 208); not computed here. "x" in the code stands for the value X, read per gas from the 4.3.3.2.5 table. The (M) suffix is explained in 3.2.1 under column (12) (Volume I page 297), not in the 4.3.3.1.1 table.
Refers to: 4.3.3.1.1; 4.3.3.1.2; 4.3.3.2.5; 6.8.3.2.9; 6.8.3.2.10; 1.2.1; 6.8.2.2; 6.8.3.2.
Carried by 32 Table A entries
UN 1005 · UN 1008 · UN 1026 · UN 1040 · UN 1048 · UN 1050 · UN 1062 · UN 1067 · UN 1082 · UN 1581 · UN 1582 · UN 1749 · UN 1859 · UN 1967 · UN 2189 · UN 2191 · UN 2197 · UN 2204 · UN 2417 · UN 2420 and 12 more UN numbers
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 4.3.3.1.1, tank code PxBH(M), page 207.
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.