Type 4 CNG Cylinder

Liquefied natural gas (LNG) vehicles require special gas cylinders designed specifically for this purpose. These cylinders are essential for storing LNG during transportation and refueling. By rearranging the information, we can discuss the importance and features of these specialized gas...
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Liquefied natural gas (LNG) vehicles require special gas cylinders designed specifically for this purpose. These cylinders are essential for storing LNG during transportation and refueling. By rearranging the information, we can discuss the importance and features of these specialized gas cylinders.
The utilization of liquefied natural gas (LNG) as a fuel source for vehicles necessitates the use of specially designed gas cylinders. These cylinders are specifically tailored to meet the unique requirements associated with LNG storage and refueling. Their significance lies in their ability to safely contain the liquefied gas throughout transportation and enable efficient refueling processes.
The special gas cylinders used for LNG vehicles have several noteworthy features. To start, their construction materials are carefully selected to withstand extreme temperatures and pressures associated with LNG storage and transportation. They must be able to contain the cryogenic liquid while maintaining its low temperature to prevent vaporization and ensure optimum fuel efficiency.
Moreover, these cylinders are engineered with advanced insulation systems to minimize heat transfer and maintain the LNG's low temperature. This insulation helps to preserve the liquid's state and prevent any unwanted transitions to gaseous form. It also plays a crucial role in reducing fuel evaporation during storage and transportation.
The design of these gas cylinders prioritizes safety, as LNG is highly flammable. They incorporate specialized valves and pressure-relief systems to mitigate the risk of over-pressurization. These safety mechanisms ensure that pressure build-up within the cylinder is regulated, preventing potential accidents or leaks that could compromise the integrity of the vehicle or harm individuals.
Furthermore, these cylinders are built with durability in mind. They undergo rigorous testing and quality control measures to ensure their ability to withstand the demanding conditions of LNG vehicle usage. Their robustness and reliability are vital for ensuring the long-term performance and longevity of LNG vehicles.
In summary, the availability of gas cylinders designed specifically for liquefied natural gas (LNG) vehicles is crucial for their successful operation. These cylinders possess unique features that allow them to safely store and transport LNG, maintain its low temperature, and ensure optimal fuel efficiency. The incorporation of advanced insulation systems, safety mechanisms, and rigorous quality control measures underpins their significance in the LNG vehicle industry.

 

Vehicle air cylinder

It is not recommended to utilize installation techniques such as welding and patching that can reduce the gas cylinder's strength and stiffness. It is important to adhere to this precautionary measure to ensure the safe and proper functioning of the cylinder.

 

For the installation of gas cylinders, it is important to ensure a reasonable and orderly arrangement. It is crucial that the gas cylinder does not extend beyond the outer contour edge of the vehicle after installation. Additionally, it is necessary to maintain a minimum distance of 2000 mm between the gas cylinder and the vehicle's exhaust pipe. However, if the distance is less than 200 mm, it is essential to incorporate a reliable thermal insulation device. Furthermore, it is vital that the distance between the inlet valve of the gas cylinder and the maximum outer contour edge on both sides of the vehicle is not less than 2000 mm.

 

In the event that the gas cylinder is installed longitudinally, meaning its axis is aligned with the vehicle's longitudinal axis, the rear of the vehicle should be where the valves and instruments of the gas cylinder are positioned.

 

To ensure a secure installation of the gas cylinder, it is necessary to firmly fix it in place. A reliable method involves using a flexible anti-skid gasket with a minimum thickness of 2mm. This gasket should be positioned between the gas cylinder and the fixed seat to prevent any slippage or movement. Additionally, the fastening bolt utilized must have a locking device that meets the specified torque requirements set by the design.
Once the gas cylinder is installed and properly fastened, it should be able to withstand a force equivalent to 8 times the total weight of the cylinder when it is fully loaded. This force must be accounted for in all six directions: upward, downward, leftward, rightward, forward, and backward. The gas cylinder should remain stationary with no relative displacement between itself and the fixed seat.
Moreover, it is important to note that the maximum relative displacement allowed at the fixed point between the gas cylinder and fixed seat should not exceed 13mm. This ensures the stability and integrity of the installation. Furthermore, it is crucial to regularly inspect the fasteners to ensure they are not loose. This will help maintain the overall security and effectiveness of the gas cylinder installation.

 

It is prohibited to install the air cylinder inside the cab or the passenger compartment. I urge you to refrain from placing the air cylinder in these areas for safety reasons.

 

Pipeline and connector

To ensure the smooth operation of the pipe system, it is crucial that the pipes are arranged in an orderly and well-planned manner. There should be no instances of collision or friction with any adjacent parts. To secure the pipes, fixing clips should be used with proper spacing not exceeding 600mm.
In case the pipes come in contact with adjacent parts or have to pass through an orifice plate, it must be protected with a gasket having low tenderness resistance. When setting up a rigid connection pipe, it is vital to ensure that an "O" shape is created between the two parts.
Moreover, if you are installing an "S" or "U" shape pipe, ensure that the radius of curvature of the center line is not less than 5 times the outer diameter of the pipe. This will allow for the elimination of issues like thermal expansion, cold contraction, and vibration. By implementing these measures, you can achieve a smoothly functioning pipe system with a longer lifespan.

 

To ensure safety and prevent any potential hazards, it is imperative to maintain a distance of at least 75mm between pipelines, joints, and engine exhaust pipes. It is recommended to install a reliable and sturdy thermal insulation device if the distance is between 75mm to 200mm. Additionally, it is mandated that the distance from the transmission shaft should not be less than 75mm. Adhering to these guidelines can minimize any risks and ensure a secure environment.

 

To ensure safe and efficient transportation, it is recommended to use flexible hoses for pipelines connecting tractors and trailers. Specifically, it is recommended to use special stainless steel metal hoses for this purpose.
To ensure that the flexible hose is securely fastened in place, elastic fixing clips should be used to attach the hose to the base part of the vehicle. The spacing between fixing clips should not be greater than 300mm, and the hose should be fixed both before and after each bend in the pipeline.
In addition, it is important to ensure that there is an adequate distance between the hose and the engine exhaust pipe. Specifically, the distance between the two should be no less than 100mm. If the distance is between 100mm and 200mm, a reliable and fixed thermal insulation device should be installed to prevent any potential hazards.
By following these guidelines, you can help ensure that your transportation operations are both safe and efficient.

 

To ensure safety, it is important to maintain a minimum distance of 15 mm between the cryogenic pipeline and any parts of the automotive electrical circuit, water pipe, gas pipe, oil pipe or other components that are not resistant to low temperatures. This precautionary measure is crucial in preventing any potential damage that may occur due to the extreme coldness of the cryogenic material that flows through the pipeline. So, it is essential to adhere to these guidelines to avoid any potential hazards.

 

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