Certify Your Cylinder and CNG Storage Vessels

If your equipment is due for inspection or certification, we’re here to help. We understand how urgent these needs can be, which is why we offer fast and reliable CNG inspection services to ensure your systems are safe, compliant, and ready to operate.

For urgent requests, don’t hesitate to contact us. We’ll prioritize your needs and work quickly to get your certification process started. Let’s make sure your operations stay on track—reach out to us today!

Compressed Natural Gas (CNG) storage vessels and cylinders are critical components in fuel systems, necessitating regular inspections to ensure safety and compliance. Whether you’re using large stationary or transportable vessels for bulk storage or smaller cylinders in vehicles, adhering to proper inspection protocols is essential.

Inspection Intervals:

Light-Duty Vehicles (Gross Vehicle Weight Rating [GVWR] < 10,000 lbs):

• Inspect every 3 years or 36,000 miles, whichever comes first.
• Mandatory inspection after any fire or accident. (Electronic Code of Federal Regulations)

Heavy-Duty Vehicles (GVWR ≥ 10,000 lbs):

• Inspect at least every 12 months.

Mandatory inspection after any fire or accident.(AFVI)

Large Storage Vessels:

• Inspection intervals may vary depending on manufacturer recommendations and regulatory requirements. Regular inspections typically include annual reviews and periodic pressure testing.(Southwest Gas)

Regulatory Standards:

Federal Motor Vehicle Safety Standard (FMVSS) 304:

Mandates that CNG cylinders be inspected every 3 years or 36,000 miles, whichever comes first, and after any accident or fire.(Federal Register)

ANSI NGV 2:

• Requires visual inspection of CNG cylinders at least every 3 years or 36,000 miles. (Transport Project)

ASME Standards:

• Apply to larger vessels, ensuring they meet industry-specific pressure and safety requirements. (Southwest Gas)

Certification Process:

For both vessels and cylinders, the certification process typically involves:

1. Visual Inspections: Checking for damage, corrosion, or wear.
2. Pressure Testing: Verifying that the container can safely withstand its operating pressures.
3. Compliance with Standards: Ensuring adherence to FMVSS 304, ANSI NGV 2, or ASME standards, as applicable.
4. Documentation: Providing a certification report to confirm compliance and maintain regulatory records.

Manufacturer Recommendations:

Always follow the inspection and maintenance guidelines provided by the cylinder or vessel manufacturer. Some manufacturers may recommend more frequent inspections than regulatory requirements.

Inspection Personnel:

Inspections should be conducted by certified CNG Cylinder and Fuel System Inspectors to ensure thorough and accurate assessments. (Transport Project)

 Additional Considerations:

Beyond scheduled intervals, inspections are required after any incident that could potentially damage the cylinder or vessel, such as a fire, accident, or significant impact.

Adhering to these inspection protocols is essential for maintaining the safety and integrity of CNG storage systems.