The Complete Guide to CNG Fuel System Inspections

Front cover of the AFVi technical resource, The Complete Guide to CNG Fuel System Inspections. A technician uses a tablet to review fuel system schematics in a shop.

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The Complete Guide to CNG Fuel System Inspections offers clear, practical guidance about inspecting natural gas vehicles.

Learn about the four types of CNG inspections, their required inspection intervals, how to identify damage before it becomes a risk, and the best practices for documentation and compliance.

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Defueling or de-energizing alternative fuel vehicles requires specialized training and instructions.  This document is intended for summary-level, general informational purposes only and does not replace manufacturer guidelines or professional training on specific procedures for defueling or de-energizing alternative fuel vehicles.  Never attempt to defuel or de-energize an alternative fuel vehicle unless you have received professional training and have in your possession and understand how to implement written instructions from the manufacturer.

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CNG Fleet Manager Knowledge Checklist