We specialise in the provision of Electrostatic Earthing of road tanker system in compliance with the following codes of practice: 

1. BS PDC LC/TR6 0079-32-1:2015 Explosive Atmosphere. 

2. NFPA 77 Static Electricity – Annex G Earthing and Bonding Diagrams.

Additional guidance is published within BS PDC LC/TR 60079-32-1:2015 Explosive atmospheres in relation to earthing and bonding of road tanker systems. Extracts from this guidance are shown below. 

7.3.2.3.3 Precautions for road tankers

1 – Earthing and bonding

a) The bonding resistance between the chassis, the tank and the associated pipes and fittings on the truck should be less than 1MΩ. For wholly metallic systems, the resistance should be 10Ω or less and if a higher value is found further investigations should be made to check for possible problems of e.g. corrosion or loose connection. 

b) An earthing cable should be connected to the truck before any operation (e.g. opening man lids, connecting pipes) is carried out. It should provide a resistance of less than 10Ω between the truck and the gantry’s designated earthing point and should not be removed until all operations have been completed.

c) It is recommended that the earth cable required in be part of a static earth monitoring system that continuously monitors the resistance between the truck and a designated earthing point on the gantry and activates interlocks to prevent loading when this resistance exceeds 10Ω. It is further recommended that the static earth monitoring system should be capable of differentiating between connection to the truck’s tank (or earth connection point) and other metal objects. This type of system will prevent operators from connecting the earthing system to objects (e.g. the mud­guards) that may be electrically isolated from the truck’s container.