Type 3: composite cylinder with metal liner

Type 3 CNG cylinders are a type of CNG storage cylinder that features a composite construction with a metal liner. They offer a lightweight and high-strength solution for CNG storage. Here are some key features of Type 3 CNG cylinders:

Construction: Type 3 cylinders consist of a metal liner, usually made of aluminum or steel, and are wrapped with multiple layers of composite materials. The metal liner provides structural strength, while the composite layers offer reinforcement and protection.

Composite Material: The composite materials used in Type 3 cylinders are typically made of fiberglass or carbon fiber. These materials are lightweight and provide high strength-to-weight ratios, allowing for reduced cylinder weight without compromising structural integrity.

Weight Reduction: Type 3 cylinders are significantly lighter compared to Type 1 and Type 2 cylinders. The combination of a metal liner with composite reinforcement allows for substantial weight reduction, improving vehicle fuel efficiency and payload capacity.

Pressure Rating: Type 3 cylinders have pressure ratings similar to Type 1 and Type 2 cylinders, typically ranging from 200 bar (2,900 psi) to 250 bar (3,600 psi) or higher, depending on regulatory requirements.

External Protection: Type 3 cylinders are typically coated with an external protective layer or paint to provide corrosion resistance and enhance durability.

Inspection and Testing: Type 3 cylinders undergo rigorous testing and certification processes to ensure compliance with safety standards. This includes hydrostatic testing, ultrasonic thickness testing, and visual inspections to verify the cylinder’s integrity and condition.

Compatibility: Type 3 cylinders are compatible with various CNG vehicles and can be used in different applications, including cars, buses, trucks, and other commercial vehicles.

Safety Considerations: Proper installation, handling, and maintenance are vital for the safe use of Type 3 cylinders. It is essential to follow manufacturer guidelines, local regulations, and best practices for cylinder installation, inspection, and maintenance.

Type 3 CNG cylinders are favored for their lightweight construction, which contributes to improved vehicle efficiency and increased payload capacity. The combination of a metal liner with composite reinforcement provides a robust and reliable solution for CNG storage, making Type 3 cylinders a popular choice in the industry.