CNG Type 2 Cylinders: The High-Pressure Storage Solution Combining Safety and Performance

In the field of clean energy vehicles, Compressed Natural Gas (CNG) has gained widespread attention for its economic and environmental advantages. At the heart of CNG storage lies the CNG Type 2 Cylinder, a critical component that directly impacts vehicle safety and performance. This article delves into the technical features and safety standards of this high-pressure container, providing a comprehensive understanding of this essential equipment.

Core Role: The High-Pressure Energy Reservoir

A CNG Type 2 Cylinder is a high-pressure vessel specifically designed for storing compressed natural gas. Given the highly flammable and explosive nature of the gas stored at a working pressure of up to 20 MPa (approximately 200 bar), the cylinder demands extreme safety and reliability. As such, it is classified as specialized equipment with potential hazards, requiring the most stringent standards in its design, materials, and manufacturing processes.

Exceptional Safety: International Certifications and Precision Engineering

To meet the safety requirements of global markets, our cylinders can be customized to comply with authoritative international certifications such as ECE R110, ISO 11439-2013, and ISO 11119-1. These certifications ensure that every stage of the product, from design to final inspection, adheres to the highest safety standards.

The core material of the cylinder is high-quality 30CrMo alloy steel, used for the liner. This material offers high strength, excellent toughness, and superior fatigue resistance, providing a robust and reliable foundation for the cylinder.

Flexible Configuration: Meeting Diverse Needs

Understanding the varying requirements of different vehicle models and installation spaces, we offer highly flexible customization services:

Valve Options: Available in single-valve and double-valve configurations to accommodate different piping system designs.

Size Customization: Cylinder diameters can be customized to specifications such as 325mm, 356mm, 406mm, and 426mm, providing optimal spatial layout solutions.

Innovative Structure: Composite Material Hoop Wrapping Technology

The outstanding performance of the CNG Type 2 Cylinder stems from its advanced "composite" structure. It is not a purely metallic cylinder but incorporates a 30CrMo steel liner reinforced in the cylindrical section using advanced "hoop wrapping" technology. This process involves strengthening the liner with resin-impregnated high-strength long fibers (such as fiberglass or carbon fiber).

This structure ingeniously combines the impermeability of metal with the high specific strength of composite materials:

Steel Liner: Ensures excellent gas tightness, effectively preventing gas permeation.

Composite Layer: Provides exceptional burst strength and safety, making the cylinder lighter in weight compared to all-steel cylinders while offering superior fatigue life and corrosion resistance.

Conclusion

The CNG Type 2 Cylinder represents the advanced level of CNG storage technology. Through the sophisticated integration of materials science and structural engineering, it achieves a perfect balance of lightweight design and high performance while ensuring absolute safety. For vehicle manufacturers, retrofit shops, and end-users alike, choosing a fully certified and scientifically designed CNG Type 2 Cylinder is fundamental to ensuring the safe, efficient, and reliable operation of CNG vehicles.