CNG Do's and Dont's

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CNG Do's and Dont's

Do's :


  • Vehicle using CNG to follow the required conditions mentioned in the Central Motor Vehicles Rules.
  • Ensuring that the workshop is authorized and observes safety standards and code of practices in kit installation and commissioning
  • Kit/cylinder to be of approved type for the make of vehicle
  • Vehicle to undergo the required pre-conversion checks thoroughly
  • Complete and thorough leak test of the gas system
  • Installer’s certificate to be collected from the workshop
  • Endorsement of CNG or bi-fuel mode in Registration Certificate from RTO
  • Annual checking of the CNG kit and keeping the related certificates
  • CNG Cylinder to follow the Gas cylinder rules and to be hydro tested once in 3 years keeping in mind the certificate of the same
  • Certificate of CNG kit, Fitness and hydro test to be possessed by the driver all the time
  • Acquainting yourself with the mechanism of CNG and the precautions essential for driving a CNG vehicle
  • In case of vehicles undergoing repairs involving welding, or heat application to any part (within 1.5 m) of the cylinder, the cylinder should be emptied first
  • In case of leakage in fuel system, vehicles shall not be parked within 6 m of any source of ignition or fire
  • Always refer to the supplier’s kit manual for the trouble-shooting guide and do not do it yourself
  • For emergency handling of any CNG leak, users must be aware of the location and operation of cylinder valve, master shut-off valve and burst disc in the CNG system. Study the system and ask your mechanic to identify these parts for you
  • Retrofitter doing the kit fitment should be able to demonstrate these operations to your satisfaction. It is advisable to operate the vehicle occasionally on petrol to ensure that the petrol system remains in good working conditions

Dont's

  • Buy components from different sources and install the kit yourself.
  • Modification or improvisation of the kit at unauthorized workshops.
  • Install an LPG, Propane or any other cylinder in place of CNG cylinder.
  • Filling LPG, Propane or any other fuel in place of CNG in a CNG cylinder.
  • Passengers on board while filling.

Other Precautions for your CNG Vehicle

  • The CNG kit installed in the vehicle should be insured along with vehicle accessories. The motorist should notify the insurance company to provide insurance on the CNG system, for which additional premium may be charged by the insurance company. Motorists should take the insurance cover for the additional CNG kit system.
  • As per present government regulation the pollution checks and a pollution certificate is mandatory even after converting the vehicle on CNG
  • A pressurized gas cylinder is probably the strongest component on the vehicle. Vehicles that were totally destroyed in collisions show the only discernible component being intact as the CNG gas cylinder. It is unlikely that cylinders will rupture due to collision impact
  • It is worth pointing out that natural gas is lighter than air and in the unlikely event of a leak from piping or container the gas will dissipate upwards quite quickly. In case of petrol and LPG, the vapour given off is heavier than air and will tend to pool near the ground