Compressed natural gas (CNG) is gas compressed to an extent where it can be used as an alternative fuel source. It is widely used for powering multiple industrial and individual applications. As we all know, it requires a robust and extremely safe cylinder to store, transport, and safely dispense them when needed. But do you know that these cylinders have multiple types and are suitable for different CNG storage purposes?
In this compressive blog post, we will explore types of CNG cylinders and how to choose them to facilitate your different CNG storage needs. Keep reading!
A] Understanding CNG Cylinders
CNG cylinders are a robust medium for storing CNG (Compressed Natural Gas) in a highly compressed way. They are meticulously designed to store high-pressure CNG and allow controlled dispensing when needed. CNG cylinders allow storage of CNG at high pressure, typically around 3000 to 3600 pounds per square inch (psi). In addition, it is equipped with multiple features, such as an extremely long service life (up to 20 years), corrosion resistance, robust safety mechanism, and ease of installation and use.
Looking for a CNG cylinder supplier?
B] Types of Cylinders For CNG Storage
Type 1 CNG Cylinders
Type 1 CNG cylinders are the most economical and widely used types of CNG tanks for a variety of purposes. It is typically made up of steel, making it extremely robust and heavy-duty. Due to its sturdy design, it can handle up to 300 bar pressure, allowing it to be used in most applications. Moreover, Type 1 CNG cylinders go through rigorous tests and pass stringent national and international safety guidelines, making them extremely secure.Â
Type 2 CNG Cylinders
Type 2 CNG cylinders, also known as hoop-wrapped cylinders, are typically made from steel and composite materials. It has nearly all the features and pressure-withstanding capabilities of a Type 1 CNG cylinder but at a higher cost.Â
Type 3 CNG Cylinders
Type 3 CNG cylinders are metal-lined cylinders composed of metal and composite materials for weight-efficient CNG gas storage. As Type 3 CNG tanks are made from metal and composite material compositions, they pose cost constraints on users. Other than that, they have nearly all the features and pressure-handling capabilities that a CNG cylinder should have.Â
Type 4 CNG Cylinders
Type 4 CNG cylinders are the lightest cylinders composed of carbon fibre and poly liner. They are the most expensive cylinders and comparatively less robust and resistant to damage. Besides, they have all the features and pressure-handling capability needed for multiple applications.Â
C] Factors To Choose The Right CNG Cylinder
1. Gas Expansion In Elevated Temperatures
Temperature fluctuations significantly impact CNG storage as the gas expands when exposed to higher temperatures. Compared to composite materials-based cylinders, Type 1 CNG cylinders, made of steel, provide superior resistance to thermal expansion. Their rigid structure ensures that even under high temperatures, the stored gas remains stable and safe. It reduces the risk of pressure variations or leaks.
2. Heat Tolerance
When choosing a CNG cylinder, heat tolerance is crucial to avoid potential hazards caused by extreme environmental conditions. Type 1 CNG cylinders have the highest heat resistance among all cylinder types, all thanks to their all-metal construction. Unlike other composite materials made cylinders, steel cylinders remain intact and provide consistent performance. In addition, Type 1 cylinders don’t degrade over time under high temperatures.
3. Impact Resistance
High impact resistance is another vital factor when selecting a CNG cylinder. Compared to composite-based types of CNG cylinders, which may be prone to cracking under heavy impact, Type 1 cylinders ensure long-term safety and durability. It ensures transporting cylinders becomes more effortless as Type 1 cylinders can bear more impact due to high impact resistance.Â
4. Corrosion Resistance
Corrosion deteriorates the structural integrity of the cylinder and makes it unsafe for continuous service. If you operate in a corrosion-prone area, it is vitally important to choose safe CNG cylinder options that have a mechanism to resist corrosion. In that case, all types of compressed natural gas cylinders have excellent corrosion resistance capability, whether it is type 1 or type 4.
5. Filling Efficiency
The ability to efficiently fill and dispense CNG is essential for seamless operation. Type 1 and Type 2 CNG cylinders have superior filling efficiency (up to 80%) compared to other types due to their uniform metal structure. This allows for quicker refuelling, making them an excellent choice for vehicles and industrial applications. So, choose any of the cylinders based on their cost-effectiveness.Â
6. Burst Prevention Measures
Safety is the top priority when selecting a CNG cylinder. So, cylinders that are thick and have high-impact resistance capability can be one that you can trust. They should undergo rigorous burst testing and comply with the highest safety standards. It ensures a reliable storage facility even under extreme conditions. In this case, only type 1 CNG cylinders fulfil all these requirements. Their thick steel walls offer the best protection against accidental over-pressurisation, making them the safest choice available.
D] Safety and Maintenance of CNG Cylinders
Regular maintenance of CNG cylinders is crucial for safety and efficiency. Inspect cylinders periodically for leaks, cracks, or physical damage. Ensure proper installation and conduct routine pressure testing to prevent potential hazards. Follow manufacturer guidelines for timely replacement and servicing. Keep cylinders away from excessive heat, direct sunlight, and corrosive substances and always use CNG gas cascade to store CNG cylinders. Proper ventilation in storage areas is essential to avoid gas buildup. Adhering to these safety measures extends the lifespan of CNG cylinders and ensures safe operation in vehicles or industrial applications.
Looking for a CNG cylinder supplier?
Conclusion
When selecting the right CNG cylinder, prioritising safety, durability, and cost-effectiveness is essential. While there are various types of CNG cylinders available, Type 1 CNG cylinders stand out as the best option across all selection factors. Their robust steel construction ensures unmatched impact resistance, superior heat tolerance, high corrosion resistance, efficient filling capability, and exceptional safety measures. Be it industrial use, transportation, or storage, Type 1 CNG cylinders provide a reliable and long-lasting solution for all CNG applications.
If you want to buy Type 1 CNG cylinders for your individual or industrial needs, We can help you out. Rama Cylinders is the largest CNG cylinder manufacturer in India, offering extremely robust CNG cylinders for storing CNG and powering different applications. In addition, we specialise in tailoring Type 1 CNG cylinders based on your needs. Contact us today!Â
FAQs
Type 1 CNG cylinders are considered the safest CNG cylinders due to their all-metal design and thick wall patterns.
Yes, composite material cylinders are more expensive than steel ones due combination of multiple materials to build a cylinder which eventually raises its overall cost.
The lifespan of any CNG cylinder is very long. It has a service life of upto 20 years.
When using a CNG cylinder, do not use a mobile phone near it, turn off the engine before refuelling, and regularly check for leaks.
Choose the right types of CNG cylinders based on the safety, durability, and cost-effectiveness factors. If any CNG cylinder type fits into these factors, choose that one without any hesitation.
