Section 28(4) in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
(4)When filling the vessels on vehicles with compressed gas, the following procedure shall be complied with in addition to the other requirements, namely:-(i)the place where the vehicle is parked shall be properly leveled;(ii)the vehicle shall be prevented from accidental movement during the transfer operation. The parking brake of the vehicle shall be on and the engine shall remain stopped, except when it is necessary to drive the pump. Where necessary, wheel chock blocks shall be used;(iii)any driving units or electrical equipment not required and not specifically designed for the transfer operation shall be stopped or isolated;(iv)the vessel mounted on a vehicle shall be electrically bonded to the fixed installation before any flammable liquefied gas transfer operations is carried out;(v)before a vehicle is moved, the electrical and the liquid and vapour connections shall be disconnected, care being exercised to avoid spillage. Where wheel chock blocks have been used they shall be removed. The vehicle shall be checked to ensure that it is in safe working order and the surrounding areas checked to ensure that any liquefied flammable gas that may have leaked or has to be vented has safely dispersed.
