What is the minimum material requirement for all tubing in CNG applications?

The minimum material requirement for all tubing in CNG applications is Type 304 Stainless Steel. This material is widely recognized for its excellent corrosion resistance and strength, making it suitable for handling compressed natural gas. The use of Type 304 is particularly advantageous in environments where exposure to moisture and various chemicals can occur, as it maintains its integrity and performance over time.

Type 316 Stainless Steel, while it does offer superior corrosion resistance, especially in saline environments, is not the baseline requirement for all CNG applications, although it may be preferred in extremely harsh conditions. Copper and aluminum, while used in certain applications, do not meet the same mechanical strength and corrosion resistance required for high-pressure CNG systems, making them unsuitable as a minimum material requirement. The selection of Type 304 ensures that the tubing can withstand the pressures and chemical environments typical in CNG systems while remaining cost-effective and readily available.