Page 10 - CNG/ LNG ESP Participant Guide 2024

NGV Essentials and Safety Practices

Background Natural gas vehicles (NGVs) are very different from those powered by liquid fuels
because natural gas is a gas. Fuel is stored onboard these vehicles in either
compressed or liquefied form.

Compressed natural gas (CNG) vehicles store fuel at extremely high pressures and,
although these vehicles are manufactured to extremely stringent safety standards,
technicians working on, or around, natural gas vehicles must be familiar with the
safety hazards and common safety practices that should be followed.

Liquefied natural gas (LNG) is a cryogenic fuel which can cause serious burns if
significant amounts are accidentally spilled or leaked onto skin. Technicians servicing
LNG vehicles also must be familiar with the potential hazards and safety practices that
must be followed.

Purpose of Training To provide the necessary safety and technology information for technicians and fleet
operations personnel to safely work on or around natural gas vehicles—both CNG and
LNG.

Target Population Heavy- and light-duty fleet and dealership vehicle technicians, maintenance
supervisors, fleet managers and other related team members responsible for
performing CNG and LNG vehicle maintenance.

Course Objectives ▪ Explain the properties and characteristics of natural gas
▪ Compare natural gas, gasoline, and diesel fuels
▪ Recognize all major low- and high-pressure CNG and LNG fuel system components;
describe their operation and safety features
▪ Describe the differences between dedicated, bi-fuel, and dual-fuel NGVs
▪ Employ safety precautions and techniques when servicing natural gas-powered
vehicles
▪ Understand CNG and LNG fueling station equipment, safety devices, operation and
fueling procedures
▪ Identify CNG and LNG defueling methods and the related safety precautions

Course Materials Participant Guide

NGV Essentials and Safety Practices (CNG & LNG) © 2024 AFVi All Rights Reserved Page 10