Dangerous Goods by Road
REQUIREMENTS FOR THE CONSTRUCTION, EQUIPMENT, TYPE APPROVAL, INSPECTIONS AND TESTS, AND MARKING OF TANKS, BULK CONTAINERS AND SPECIAL COMPARTMENTS FOR EXPLOSIVES OF MOBILE EXPLOSIVES MANUFACTURING UNITS (MEMUs)
NOTE 1: For portable tanks, see Chapter 6.7; for fixed tanks (tank-vehicles), demountable tanks, tankcontainers
and tank swap bodies, with shells made of metallic materials, see Chapter 6.8; for fibrereinforced
plastics tanks see Chapter 6.9; for vacuum operated waste tanks see Chapter 6.10; for bulk
containers see Chapter 6.11.
NOTE 2: This Chapter applies to fixed tanks, demountable tanks, tank-containers, tank swap bodies, which do
not comply with all requirements of the Chapters mentioned in Note 1 as well as bulk containers and
special compartments for explosives.
Scope
The requirements of this Chapter are applicable to tanks, bulk containers and special compartments
intended for the carriage of dangerous goods on MEMUs.
General provisions
Tanks shall meet the requirements of Chapter 6.8, notwithstanding the minimum capacity defined in
section 1.2.1 for fixed tanks, as modified by the special provisions of this Chapter.
Bulk containers intended for the carriage of dangerous goods on MEMUs shall comply with the
requirements for bulk containers of type BK2.
Where a single tank or bulk container contains more than one substance each substance shall be
separated by at least two walls with drained air space between.
Tanks
Tanks with a capacity of 1 000 litres or more
These tanks shall meet the requirements of section 6.8.2.
For UN Nos. 1942 and 3375, the tank shall meet the requirements of Chapters 4.3 and 6.8 concerning
breather devices and, in addition, shall have bursting discs or other suitable means of emergency
pressure relief, approved by the competent authority of the country of use.
For shells not of a circular cross-section, for example box-shaped or elliptical shells, which cannot be
calculated according to 6.8.2.1.4 and standards or technical code mentioned therein, the ability to
withstand the permissible stress may be demonstrated by a pressure test specified by the competent
authority.
These tanks shall meet the requirements of sub-section 6.8.2.1 other than 6.8.2.1.3, 6.8.2.1.4 and
6.8.2.1.13 to 6.8.2.1.22.
The thickness of these shells shall not be less than the values given in the table below:
|
Austenitic stainless steels |
2.5 mm |
|
Other steels |
3 mm |
|
Aluminium alloys |
4 mm |
|
Pure aluminium of 99.80% |
6 mm |
Protection of the tank against damage through lateral impact or overturning shall be provided.
Protection shall be provided according to 6.8.2.1.20 or the competent authority shall approve
alternative protection measures.
By derogation from the requirements of 6.8.2.5.2 tanks do not need to be marked with the tank code
and the special provisions, as applicable.
Tanks with a capacity of less than 1 000 litres
The construction of these tanks shall meet the requirements of sub-section 6.8.2.1 other than 6.8.2.1.3,
6.8.2.1.4, 6.8.2.1.6, 6.8.2.1.10 to 6.8.2.1.23 and 6.8.2.1.28.