English (United Kingdom) Viet Nam


  1. What is Compressed Natural Gas (CNG)?
  • CNG consists mostly of 85% methane (CH4), 10% ethane (C2H6) and the remainders are propane (C3H8), butane (C4H10) and only one carbon atom; therefore when burning the natural gas generates 20% CO2 and 50% NOx which is less than petrol. For that reason this gas is the clean gas and don’t pollute the environment. The natural gas is not easy to burn and lighter than air, therefore it disperses quickly and flies high when released.
  • The Natural Compressed Gas is a clean replacement energy as compared to other energy. It is composed of clean compressed natural gas at pressure of 3,000 or 3,600 psi.
  1. How is the safety of mother station and CNG factory established?


The mother station is designed and produced in accordance with the following standards:

  • MS1204:2001
  • Jointless steel cylinders – 3AA and 3AAX US DOT 49 CFR § 178.37ASME Section VIII: fire resistant pressure vessel
  • ASME B31.8: 1995 – Gas transport and distribution system
  • Additionally,  the above components are periodically inspected by competent authorities.


  1. How is the safety of CNG trailers established?
  • CNG cylinders are designed and produced in accordance with jointless steel tubes under the standard of 3AA and 3AAX - 3AAX -US DOT 49 CFR § 178.37.
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