ADR portable tank instruction T22

Heading in ADR: “PORTABLE TANK INSTRUCTIONS”

Portable tank, Class 1 and 3–9: test 10 bar; shell 10 mm; relief See 6.7.2.8.3; bottom openings Not allowed.

T22 belongs to the T1–T22 set of portable tank instructions, which serve Class 1 and Class 3–9 goods, liquid or solid; the tank has to satisfy the general rules of 4.2.1 and the design rules of 6.7.2. Its four entries are: minimum test pressure 10 bar; minimum shell thickness "10 mm" (millimetres of reference steel for metal shells, governed by 6.7.2.4); pressure relief "See 6.7.2.8.3" (governed by 6.7.2.8); bottom openings "Not allowed" (governed by 6.7.2.6). The relief column points to 6.7.2.8.3, so that additional relief arrangement applies to this instruction. Bottom openings are barred when a liquid is carried (6.7.2.6.1); a substance that stays solid at every temperature met in normal carriage may still use bottom openings built to 6.7.2.6.2. FRP shells under these instructions are limited to Class 1, 3, 8, 9, 5.1, 6.1 or 6.2 substances, and Chapter 6.9 then applies too. Column (10) gives the least demanding instruction allowed; tanks under stricter instructions may be used as set out in 4.2.5.2.5.

Note. Values read from the T1–T22 table; the higher instructions also accepted in place of this one are listed in the 4.2.5.2.5 table (Volume II page 189), not repeated here.

Refers to: 4.2.1; 6.7.2; 6.7.2.4; 6.7.2.8; 6.7.2.6; Chapter 6.9; 4.2.5.2.5; 6.7.2.8.3; 6.7.2.6.1; 6.7.2.6.2.

Carried by 20 Table A entries

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