Does the air compressor count as a pressure vessel

The air compressor itself does not belong to the pressure vessel.

A pressure vessel is a closed container that can withstand pressure, and is usually used to store, transmit or process fluid media such as gas, liquid or liquefied gas. The air compressor is a kind of mechanical equipment that compresses and delivers gas to the place where it is needed. Its main function is to compress the gas, not to store or process the fluid medium.

However, some components in the air compressor, such as oil and gas separator and gas storage tank, may belong to the category of pressure vessel, because they need to withstand a certain internal pressure. The design, manufacture and use of these components need to comply with relevant pressure vessel standards and regulatory requirements to ensure their safety and reliability.

Therefore, although the air compressor itself is not a pressure vessel, it is necessary to pay attention to the safety and compliance of its related components during use and maintenance.