Type approval

The competent authority or a body designated by that authority shall issue in respect of each new type
of tank an approval attesting that the design is suitable for the purpose for which it is intended and
meets the construction and equipment requirements of this chapter as well as the special provisions
applicable to the substances to be carried.

The approval shall be based on the calculation and the test report, including all material and prototype
test results and its comparison with the design calculation, and shall refer to the design type
specification and the quality assurance programme.

The approval shall include the substances or group of substances for which compatibility with the
shell is provided. Their chemical names or the corresponding collective entry (see 2.1.1.2), and their
class and classification code shall be indicated.

In addition, it shall include design and threshold values (such as life-time, service temperature range,
working and test pressures, material data) specified and all precautions to be taken for the
manufacture, testing, type approval, marking and use of any tank, manufactured in accordance with
the approved design type.

Inspections

For every tank, manufactured in conformity with the approved design, material tests and inspections
shall be performed as specified below.

The material tests according to 6.9.4.2.2, except for the tensile test and for a reduction of the testing
time for the bending creep test to 100 hours shall be performed with samples taken from the shell.
Samples manufactured in parallel may only be used, if no cutouts from the shell are possible. The
approved design values shall be met.

Shells and their equipment shall either together or separately undergo an initial inspection before
being put into service. This inspection shall include:
- a check of conformity to the approved design;
- a check of the design characteristics;
- an internal and external examination;
- a hydraulic pressure test at the test pressure indicated on the plate prescribed in 6.8.2.5.1;
- a check of operation of the equipment;
- a leakproofness test, if the shell and its equipment have been pressure tested separately.

 

For the periodic inspection of tanks the requirements of 6.8.2.4.2 to 6.8.2.4.4 shall apply. In addition,
the inspection in accordance with 6.8.2.4.3 shall include an examination of the internal condition of
the shell.

The inspections and tests in accordance with 6.9.5.1 and 6.9.5.2 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 6.9.4.4.

Marking

The requirements of 6.8.2.5 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.

REQUIREMENTS FOR THE CONSTRUCTION, EQUIPMENT, TYPE APPROVAL, INSPECTION AND MARKING OF VACUUM-OPERATED WASTE TANKS

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.
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