Special equipment

Air compressors themselves are classified as power machinery and do not fall under the category of special equipment; however, their associated air receivers are pressure vessels. Generally, air receivers with a volume exceeding 30 liters and operating at…

The classification of pressure vessels in screw air compressor oil–gas separators has long been a subject of close attention. This article clarifies the criteria for defining simple pressure vessels, examines the differences in regulatory classification between small and…

The screw air compressor’s main unit itself is not classified as a pressure vessel; however, its associated air receiver tank and the internal oil–gas separator are legally designated as pressure vessels or simple pressure vessels when they meet…

The screw compressor unit itself is generally not classified as a special‑purpose device under national regulations. However, its associated components—such as air receivers, pressure pipelines, and safety accessories—are subject to special‑equipment oversight if they meet the statutory pressure…

As a gas‑compression power device, a screw compressor is not itself classified as a pressure vessel. However, ancillary components in its system—such as air receivers and oil–gas separators—are subject to pressure‑vessel regulation if their working pressure, volume, and…

Screw-type air compressors themselves are generally not classified as special equipment; however, certain critical components within their auxiliary systems may fall under the scope of special equipment regulations. This article provides a detailed analysis of the special‑equipment status…

Screw-type air compressors do not, by themselves, incorporate a standalone pressure vessel in the conventional sense; however, they do contain pressurized components such as oil–gas separation tanks. Typically, an air‑compressor system requires an external receiver tank to stabilize…

The screw-type air compressor unit itself is not classified as a special‑purpose device; however, the associated air receivers and pressure pipelines, when they meet specific parameter thresholds, are included in the catalog of special‑purpose equipment and subject to…