AS 5602:2009 pdf free download – Refined petroleum products – Vehicle bottom loading and vapour recovery
3.3 VAPOUR RECOVERY HOSE AND PIPING
The following requirements shall apply:
(a) The vapour hose shall be at least 3 m long, and preferably 4 m, permanently mounted to the vehicle vapour collection system within the envelope shown in Figure 2.2(a).
(b) The dedicated vapour recovery hose shall fit the tail of the 100 mm coupler.
(c) The dedicated vapour hose shall be 100 mm nominal bore approved vapour recovery hose. The body colour shall be black, with a 50 mm wide yellow helical band at a pitch of approximately 250 mm.
(d) Vehicles without a permanently mounted hose shall carry a hose compatible with the above items and shall comply with the relevant statutory requirements.
(e) Vapour recovery piping connected to two or more compartments shall be 100 mm diameter or of equivalent cross-section, to permit simultaneous filling of two compartments at 2500 L/min each.
4.1 SCOPE OF SECTION
This Section outlines requirements for the overfill protection system on the road tank vehicle.
4.2 TANK COMPARTMENT SENSING ELEMENT
An approved sensor element, compatible with existing equipment, shall be mounted in each vehicle tank compartment, at a level which will actuate the shutting down on product supply to the compartment, in order to maintain the minimum allowable ullage. This element shall be suitable for product temperatures of at least 7°C. A second element may be provided for product temperatures between 7°C and 120°C. NOTE: Generally the closure is in two stages. While the signal is instantaneous, the time to close the valve can vary, dependent on the type of valve used. From data provided by the valve manufacturers, the optimum time for closure is approximately 2.5 seconds for such a valve. This would then allow 105 L to enter the compartment at full flow before complete closure of the loading system is achieved. This ullage will be greater than the 3% allowed for compartments of less than 3000 L capacity.
4.3 CONNECTION BETWEEN FILL STAND AND VEHICLE
The following requirements apply:
(a) An approved electrical connection plug shall be fitted to the cable from the fill stand and provided with ten connector positions, seven of which shall be fitted with connector pins.
(b) An approved socket shall be fitted to the tank vehicle at the location shown in Figure 2.2(a) and labelled ‘ ELECTRICAL CONNECTION SOCKET ’.
(c) Connector pins corresponding to positions 3 to 8 shall be used, with Position 9 and 10, both being used for the common earth (see Figure 4.1). Connector pins corresponding to positions 1 and 2 shall be left blank.
(d) A dummy sensor shall be connected to unused pins if there are fewer than six compartments. For example, in a three-compartment truck Pin 3 connects to the sensor in Compartment 1, Pin 4 to Compartment 2, Pin 5 to Compartment 3 and Pins 6 and 7 are each connected to a dummy sensor. Pin 9 and 10 is always the common earth.
(e) Any new designs shall be compatible with existing equipment.