Special requirements for the carriage of substances with a flash-point of not more than 60 °C

FRP tanks used for the carriage of substances with a flash-point of not more than 60°C shall be
constructed so as to ensure the elimination of static electricity from the various component parts so as
to avoid the accumulation of dangerous charges.

The electrical surface resistance of the inside and outside of the shell as established by measurements
shall not be higher than 109 ohms. This may be achieved by the use of additives in the resin or
interlaminate conducting sheets, such as metal or carbon network.

The discharge resistance to earth as established by measurements shall not be higher than 10^7 ohms.

All components of the shell shall be electrically connected to each other and to the metal parts of the
service and structural equipment of the tank and to the vehicle. The electrical resistance between
components and equipment in contact with each other shall not exceed 10 ohms.

The electrical surface-resistance and discharge resistance shall be measured initially on each
manufactured tank or a specimen of the shell in accordance with a procedure recognized by the
competent authority.

The discharge resistance to earth of each tank shall be measured as part of the periodic inspection in
accordance with a procedure recognized by the competent authority.

Items of equipment

The requirements of 6.8.2.2.1, 6.8.2.2.2 and 6.8.2.2.4 to 6.8.2.2.8 shall apply.

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 (b) (TE) shall also apply.

Type testing and approval

For any design of a FRP tank type, its materials and a representative prototype shall be subjected to
the design type testing as outlined below.

Material testing

The elongation at fracture according to EN ISO 527-4:1997 or EN ISO 527-5:2009 and the heat
distortion temperature according to EN ISO 75-1:2013 shall be determined for the resins to be used.

manufactured in parallel may only be used, if it is not possible to use cutouts from the shell. Prior to
testing, any liner shall be removed.
The tests shall cover:
- Thickness of the laminates of the central shell wall and the ends;
- Mass content and composition of glass, orientation and arrangement of reinforcement layers;
- Tensile strength, elongation at fracture and modulus of elasticity according to EN ISO 527-
4:1997 or EN ISO 527-5:2009 in the direction of stresses. In addition, the elongation at fracture
of the resin shall be established by means of ultrasound;
- Bending strength and deflection established by the bending creep test according to EN ISO
14125:1998 + AC:2002 + A1:2011 for a period of 1000 hours using a sample with a minimum
width of 50 mm and a support distance of at least 20 times the wall thickness. In addition, the
creep factor α and the ageing factor β shall be determined by this test and according to
EN 978:1997.

The interlaminate shear strength of the joints shall be measured by testing representative samples in
the tensile test according to EN ISO 14130:1997.
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