ADR portable tank instruction T7

Heading in ADR: “PORTABLE TANK INSTRUCTIONS”

Portable tank, Class 1 and 3–9: test 4 bar; shell See 6.7.2.4.2; relief Normal; bottom openings See 6.7.2.6.3.

T7 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 4 bar; minimum shell thickness "See 6.7.2.4.2" (millimetres of reference steel for metal shells, governed by 6.7.2.4); pressure relief "Normal" (governed by 6.7.2.8); bottom openings "See 6.7.2.6.3" (governed by 6.7.2.6). The word "Normal" in the relief column means every part of 6.7.2.8 applies with the single exception of 6.7.2.8.3. Bottom openings may be fitted, built to the arrangement set out in 6.7.2.6.3. 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; 6.7.2.4.2; 6.7.2.6.3.

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