CNG Hydrotesting Checkup Period

Although CNG cylinders are designed with the highest safety factors and undergo many tests to ensure safety, they should also undergo periodic safety visual inspections. The minimum requirement for conducting these inspections is as follows: General Visual Inspection: During preventative maintenance service, when fueling the vehicle, or any other time the cylinders are visible. Detailed Visual Inspection: 3 years in NGV-2; 3 years or 36,000 miles (whichever comes first) in FMVSS304. Individual manufacturers may set more frequent schedules.

NOTE: Detailed inspections should be performed by a trained cylinder inspector following CGA inspection procedures and manufacturer’s guidelines.

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