For the periodic inspection of tanks the requirements of to shall apply. In addition,
the inspection in accordance with shall include an examination of the internal condition of
the shell.

The inspections and tests in accordance with and shall be carried out by the expert
approved by the competent authority. Certificates shall be issued showing the results of these
operations. These certificates shall refer to the list of the substances permitted for carriage in this shell
in accordance with


The requirements of shall apply to the marking of FRP tanks, with the following amendments:
- the tank plate may also be laminated to the shell or be made of suitable plastics materials;
- the design temperature range shall always be marked.

In addition, when they are shown under an entry in Column (13) of Table A of Chapter 3.2, the special
provisions of 6.8.4 (e) (TM) shall also apply.


NOTE 1: For portable tanks and UN multiple-element gas containers (MEGCs) see Chapter 6.7; for fixed
tanks (tank-vehicles), demountable tanks and tank containers and tank swap bodies, with shells made
of metallic materials, and battery-vehicles and multiple element gas containers (MEGCs) other than
UN MEGCs see Chapter 6.8; for fibre-reinforced plastic tanks see Chapter 6.9.
NOTE 2: This Chapter applies to fixed tanks, demountable tanks, tank-containers and tank swap bodies.



NOTE: A tank which fully complies with the requirements of Chapter 6.8 is not considered to be a
"vacuum-operated waste tank".

The term "protected area" means the areas located as follows:
(a) The lower part of the tank in a zone which extends over a 60o angle on either side of the lower
generating line;
(b) The top part of the tank in a zone which extends over a 30° angle on either side of the top
generating line;
(c) On the end front of the tank on motor vehicles;
(d) On the rear end of the tank inside the protection volume formed by the device stipulated in


The special requirements of 6.10.2 to 6.10.4 complete or modify Chapter 6.8 and are applied to
vacuum-operated waste tanks.
Vacuum-operated waste tanks may be equipped with openable ends, if the requirements of Chapter
4.3 allow bottom discharge of the substances to be carried (indicated by letters "A" or "B" in Part 3 of
the tank code given in Column (12) of Table A of Chapter 3.2, in accordance with
Vacuum-operated waste tanks shall comply with all requirements of Chapter 6.8, with the exception
of requirements overtaken by a special provision in this Chapter. However the requirements of,, and shall not apply.


Tanks shall be designed for a calculation pressure equal to 1.3 times the filling or discharge pressure
but not less than 400 kPa (4 bar) (gauge pressure). For the carriage of substances for which a higher
calculation pressure of the tank is specified in Chapter 6.8, this higher pressure shall apply.

Tanks shall be designed to withstand a negative internal pressure of 100 kPa (1 bar).

Items of equipment

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