28)Type 2:steel cylinders with composite reinforcement

Type 2 CNG cylinders are a type of CNG storage cylinder that combines steel construction with composite reinforcement. They offer improved strength and weight characteristics compared to Type 1 steel cylinders. Here are some key features of Type 2 CNG cylinders:

Construction: Type 2 cylinders have a steel liner similar to Type 1 cylinders, but they are additionally reinforced with composite materials. The steel liner provides structural strength, while composite materials, such as fiberglass or carbon fiber, are used to enhance the cylinder’s mechanical properties.

Composite Reinforcement: The composite materials, in the form of continuous filament windings or woven fabrics, are applied over the steel liner. These reinforcements provide added strength and stiffness to the cylinder, allowing for a reduction in weight while maintaining structural integrity.

Weight Reduction: The incorporation of composite materials in Type 2 cylinders results in a lighter weight compared to Type 1 cylinders. The reduced weight contributes to improved vehicle fuel efficiency and increased payload capacity.

Pressure Rating: Type 2 cylinders have pressure ratings that can range from 200 bar (2,900 psi) to 250 bar (3,600 psi) or higher, depending on the specific design and regulatory requirements.

External Protection: Similar to Type 1 cylinders, Type 2 cylinders often feature an external protective coating or paint to provide corrosion resistance and ensure durability.

Inspection and Testing: Type 2 cylinders undergo rigorous testing and certification procedures to ensure compliance with safety standards. This includes hydrostatic testing, ultrasonic thickness testing, and visual inspections to assess the cylinder’s integrity and condition.

Compatibility: Type 2 cylinders are compatible with various CNG vehicles and can be used in a range of applications, including cars, buses, trucks, and other commercial vehicles.

Safety Considerations: Proper installation, handling, and maintenance are essential for the safe use of Type 2 cylinders. It is crucial to follow manufacturer guidelines, local regulations, and best practices for cylinder installation, inspection, and maintenance.

Type 2 CNG cylinders are designed to offer an improved balance between strength, weight, and cost compared to Type 1 cylinders. The use of composite reinforcement allows for weight reduction while maintaining the necessary structural integrity, making Type 2 cylinders a popular choice for CNG storage in various vehicles and applications.