ADR tank code L21DH(+)

ADR tank code for Classes 1 and 3–9: liquid tank, 21 bar, openings D, hermetically closed, suffix (+).

L21DH(+) is decoded part by part from the 4.3.4.1.1 table for Classes 1 and 3–9. Part 1 "L" is a tank for liquid-state substances (liquids, or solids handed over molten); part 2 "21" is minimum calculation pressure of 21 bar (see 6.8.2.1.14). Part 3 "D" (openings): filled and discharged from the top; nothing opens below the liquid surface. Part 4 "H" (safety valves/devices): the tank is hermetically closed (see 1.2.1). The "(+)" restricts the tank: it may be used alternately for other substances only if its certificate of type approval allows it, and the column (13) special provisions complete the requirements (4.3.4.1.3). The code gives the least stringent tank accepted; others may be used under the hierarchy in 4.3.4.1.2.

Note. Tank codes permitted in place of this one: see the rationalized approach and hierarchy in 4.3.4.1.2 (Volume II pages 217–222); not computed here. L21DH appears in the 4.3.4.1.3 list on Volume II page 223 (outside the cited range); this record is anchored to the 4.3.4.1.1 table instead.

Refers to: 4.3.4.1.1; 4.3.4.1.2; 6.8.2.1.14; 6.8.2.2.2; 6.8.2.2.6; 1.2.1; 4.3.4.1.3.

Carried by 3 Table A entries

UN 1052 · UN 1744 · UN 1790