Carbon steel air receiver is a specialized pressure vessel designed for storing compressed air. It primarily functions to buffer stored air while stabilizing system pressure, preventing frequent loading and unloading cycles of air compressors and removing most of the liquid water. Typically, it is used in conjunction with air compressors, air dryers, and filters to form a compressed air station for industrial production.

To ensure safety and stability, the air receivers undergo various tests, such as flaw detection, hydrostatic testing, and non-destructive testing. Only after passing inspections by the local Bureau of Quality and Technical Supervision are they certified and released from the factory with a pressure vessel certificate.