Are air compressors with a capacity exceeding 30 liters considered special equipment?

Differences in Equipment Characteristics Between Air Compressors and Air Storage Tanks

When examining whether air‑compressing equipment with a capacity exceeding 30 liters falls under the category of special equipment, it is first necessary to distinguish between the compressor unit itself and its associated gas storage tank. The compressor, as a power machine that converts mechanical energy into pneumatic pressure energy, is not, in the current list of special equipment, subject to regulatory oversight on its own.

However, the ancillary components in the air compressor system…Gas storage tankIt is classified as a pressure vessel. Because pressure vessels contain gases or liquefied gases, they pose a certain risk of explosion and are therefore a key focus of safety supervision under special equipment regulations.

Criteria for Determining Special-Purpose Equipment for Pressure Vessels

Determining whether a pressure vessel qualifies as special equipment does not depend solely on its volume; rather, it must simultaneously meet specific technical parameters. According to relevant safety technical regulations, pressure vessels subject to special equipment oversight generally must satisfy the following conditions:

• The maximum working pressure is greater than or equal to 0. 1MPa (gauge pressure);
• The product of pressure and volume is greater than or equal to 2. 5MPa ·L;
• The contained medium is a gas, a liquefied gas, or a liquid whose maximum operating temperature is greater than or equal to its standard boiling point.

How are gas storage tanks with a capacity exceeding 30 liters defined?

When the volume of a gas storage tank exceeds 30 liters, as long as its maximum working pressure is equal to or greater than 0. 1MPa, the product of its pressure and volume typically far exceeds 2. 5MPa ·The critical value of L. Therefore, in the vast majority of industrial application scenarios,Gas storage tanks with a capacity exceeding 30 liters and operating under pressure are classified as pressure vessels within the category of special equipment., it needs to be brought under the safety supervision system for special equipment.

It should be noted that certain gas storage tanks meeting specific criteria may be classified asSimple pressure vesselSimple pressure vessels are generally exempt from periodic inspections during their design service life; however, this does not absolve them of all regulatory requirements, and their manufacture, installation, and operation must still comply with the relevant safety technical codes.

Recommendations for Enterprise Equipment Compliance Management

For enterprises that use gas storage tanks with a capacity exceeding 30 liters, the following management measures are recommended to ensure compliance and safety:

• Registration for Use:Before putting the equipment into service or within the prescribed time after it has been put into service, submit a registration application to the local special equipment safety supervision and administration authority and obtain a certificate of use registration.
• Periodic inspection:In strict accordance with the requirements of the safety technical specifications, submit a request for periodic inspection to a special equipment inspection agency prior to the expiration of the inspection validity period.
• Daily Maintenance and Inspections:Establish technical safety records for equipment, conduct regular routine maintenance and servicing, and calibrate safety accessories (such as safety valves and pressure gauges) to ensure that the equipment remains in good working condition.
• Personnel Training:Ensure that relevant management personnel and operators possess the requisite knowledge of special equipment safety and strictly adhere to operating procedures.

For specific definitions of equipment and regulatory requirements, companies are advised to consult the local special equipment safety supervision and administration authorities or specialized inspection agencies to obtain the most accurate policy guidance.