What type of steel is specified for piping in CNG applications?

In CNG applications, the use of Schedule 80 ASTM Steel for piping is preferred due to its thickness and durability. Schedule 80 pipe has a higher wall thickness compared to Schedule 40 and Schedule 60, which provides greater strength and resistance to pressure. This characteristic is essential for safely transporting compressed natural gas, which is stored and transported at high pressures.

The increased wall thickness helps mitigate the risks associated with leaks or ruptures in the pipeline, which can be catastrophic in gas transportation. Additionally, Schedule 80 pipe is more capable of withstanding the stresses caused by temperature fluctuations and environmental factors, further enhancing safety in CNG applications.

Other types of steel such as Schedule 40, Schedule 60, and Schedule 100 may not provide the same level of pressure resistance or might be deemed unnecessary for typical applications, making Schedule 80 the most suitable choice for safely handling CNG.