Page 29 - WM E-Learning Handbook

Slide Topic Content Notes

Welding and Hot Work: Less than six feet from CNG cylinders
The Six Foot Rule

Greater than six feet from CNG cylinders

Welding and Hot Work:  Close cylinder valves

Greater Than Six Feet of the CNG  Operate engine to consume

Cylinders fuel lines.

 Check fuel system and hot

work area for leaks.

 Cover fuel system

components with welding

blanket

Welding and Hot Work:  Defuel/depressurize fuel
Within Six Feet of the CNG system.
Cylinders
 Operate engine to consume
fuel in lines.

 Open bleed valve in the
FMM.

 Close valves on FMM and all
cylinders.

 Check the fuel system and
hot work area for leaks.

 Use welding blankets and
shields to cover CNG fuel
system components.

 Disconnect and remove CNG
cylinders and fuel lines if
necessary.

Technician Safety and Awareness Training for NGVs © 2018 NGVi All Rights Reserved Page 27