Compressed air storage tanks fully meet the definition of sealed pressurized vessels, as they are airtight and contain gas at a pressure higher than atmospheric pressure. When specific pressure and volume criteria are met, such tanks are classified…
Special equipment
In compressed air systems, the air receiver tank is the most typical and legally designated pressure vessel component. Moreover, in certain screw compressors, the oil–gas separator tank also falls under the category of pressure vessels when it meets…
Compressed air systems in pharmaceutical manufacturing play a critical role. This article examines whether such systems qualify as pressure vessels, analyzes the relevant regulations and standards, delineates the criteria for classifying pressure vessels, and outlines the compliance requirements…
This article examines whether small mobile air compressors qualify as pressure vessels and special equipment. It provides a detailed analysis of the criteria for defining pressure vessels, including key parameters such as operating pressure, vessel volume, and the…
The safety valve of an air compressor is not classified as a special‑type equipment itself, but rather as a safety accessory for such equipment. As a critical protective component within the air compressor’s assembly, the safety valve plays…
Blog post
Does a 600-liter gas storage tank operating at a working pressure of 0.8 MPa qualify as special equipment?
This article provides a detailed analysis of whether an air storage tank with a working pressure of 0.8 MPa and a volume of 600 L qualifies as special equipment. Based on the current Safety Technical Code for Pressure…
This article provides a detailed analysis of whether miniature reciprocating‑piston air compressors fall under the category of special equipment. Starting with the definition of special equipment, it clarifies the classification of the compressor’s main unit and focuses on…
Whether a compressed-air storage tank qualifies as special equipment depends on its operating pressure, volume, and the nature of the contained medium. According to TSG 21, if the tank simultaneously meets the criteria of a design pressure ≥…
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