Page 28 - WM E-Learning Handbook

Slide Topic Content Notes

Depressurizing Low-Pressure  Always follow manufacturer’s
Components procedures

 Generic description of
procedure
 Close all cylinder valves
or disconnect electric
solenoid valve
 Using defueling port or
bleed valve, depressurize
the high-pressure fuel
system
 Use bleed valve on low-
pressure fuel system (if
present) to depressurize
OR
 Use two wrenches to
disconnect the fitting of
the component to be
serviced

Safety Practices for Welding and  Follow WM hot work

Hot Work procedures

 Hot work permits are

required outside of

designated hot work areas

 Ensure hot work area (within

35 feet) is clear of flammable

and combustible materials

 Use welding blankets or

shields to protect CNG fuel

system components

 Check the fuel system for

leaks with a gas detector

 Defuel or remove fuel system

components if necessary

 A fire watch may be

necessary while conducting

hot work

 Sparks and hot work debris

can travel beyond your

viewpoint

 Always maintain an active

fire watch for a minimum of

30 minutes

 Inspect the fuel system for

heat damage

Technician Safety and Awareness Training for NGVs © 2018 NGVi All Rights Reserved Page 26