What materials are compatible with CNG?

The compatibility of materials with compressed natural gas (CNG) is crucial in ensuring safety and performance in storage and transport systems. Certain types of steel and aluminum are commonly used in high-pressure applications like CNG tanks and pipelines due to their strength, lightweight properties, and resistance to corrosion.

These metals can handle the high pressures associated with CNG without compromising structural integrity. Specifically, alloyed steel grades and aluminum grades are selected for their superior mechanical properties and ability to maintain performance over a range of temperatures, which is essential for the safe handling of CNG.

The other materials listed may not provide the same level of safety or efficiency. For instance, wood and plastic may not be able to withstand high pressure, glass can be brittle and is not suitable for high-pressure applications, and materials like copper and lead can corrode or react unfavorably when in contact with CNG. Thus, the use of certain types of steel and aluminum is the most suitable for systems handling CNG.