BS/EN 12312-12-2017 pdf download.Aircraft ground support equipment— Specific requirements Part 12: Potable water service equipment.
5.1.5 The ground clearance shall allow without interference the transversing of two surfaces Intersecting at an angle of ± 30 (5 %) either in bridging or cresting.
5.1.6 The height of the potable water vehicle shall allow the servicing of aircraft as intended by the manufacturer (see 6.4).
Parts of potable water vehicles intended to be driven underneath the aircraft should not be more than 1,60 m (63 in) above the ground (see EN 19 15-1:2013, Introduction, f) — negotiation).
5.1.7 All parts of the water system shall be made of materials acceptable for use in connection with potable waler. Where stainless steel is used, the material shall be acid resistant like quality No 1.4404 according to EN 10088-1. All inside surfaces shall be pickled.
5.1.8 Self-propelled potable water vehicles shall be equipped with driver accommodation.
5.1.9 A working light shall be provided, e.g. for connection of hoses to the aircraft during night operations. The design and installation of the light shall conform to EN 1837. The minimum luminous flux of the lamp shall be 250 Im.
5.1.10 FillIng the tanks of the potable water vehicle should where possible be performed from the ground level without climbing upon the vehicle. Any hose connection, valve and control shall be accessible from the ground level.
Where climbing upon the vehicle is necessary, guard-rails shall be installed in accordance with
EN 1915-1:2013, 5.13.2.
5.1.11 The operator’s workplace shall have a durable slip-resistant floor surface, with a minimum Ru
slip-resistance classification.
Slip resistance classification shall be measured in accordance with DIN 51130:2014-02, Table 3.
5.2 Tanks
5.2.1 For easy cleaning and disinfecting. tanks shall have the following features:
a) all inside fittings, welds, joints and rivets shall have a smooth finish;
b) cylindrical ends shall have a convex shape;
c) all inside corners of the tank shell shall have a radius of at least 10 mm (0,4 in);
d) the bottom of the tank shall have a minimum slope of 10 towards the drain point.
5.3.3 There shall be a relief valve to allow the pressure to be regulated according to the requirements of different aircraft types. The relief valve shall be adjustable easily, e.g. without using tools. A pressure gauge easily readable and the means of adjustment of the pressure relief device shall be provided at the workplace.
NOTE I The pressure range on commonly encountered civil transport aircraft is 1,5 bar to 3,5 bar. NOTE 2 An independent aircraft water tank draining system can be installed.
5.3.4 Control devices shall be provided to allow the pump to be operated from the ground and, where fitted, from the work platform.
5.3.5 A meter, equipped with a zero reset, shall be provided to indicate the amount of water delivered
to the aircraft
5.3.6 Water hoses shall:
a) be flexible;
b) have an inside diameter of at least 19 mm (3/4 in):
c) enable servicing of the intended aircraft (see EN 1915-1:2013, Introduction, f) — negotiation and 6.4) and shall be equipped with a coupler meeting the requirements of ISO 17775 at the delivery end;
dl be made of material acceptable for use in connection with potable water. NOTE A hose draining system can be installed.
5.4 Workplaces
5.4.1 Fixed or vertically moving lifting/work platrorms shall be provided on the potable water vehicle. This is not applicable for vehicles where It is possible to reach the service connections from ground level (see EN 1915-1:2013. Introduction, f) negotiation). Moving liftingJwork platforms shall comply with the applicable requirements of EN 12312-8.
Where there Is a risk of fallIng from a height greater than I m, fixed guard rails shall be Installed in
accordance with EN 1915-1:2013. 5.13.2.3.
Access to the lifting/work platforms shall comply with EN 1915-1:2013, 5.14.
5.4.2 The minimum load capacity of work platforms shall be 200 kg (441 Ib).BS/EN 12312-12-2017 pdf download.

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