Regulations on the Service Life of Air Compressor Storage Tanks

Definition of the Design Service Life of Air Compressor Storage Tanks

Air compressor storage tanks (air receivers) are classified as special equipment under the state‑regulated category of pressure vessels. In accordance with the relevant safety technical specifications for special equipment, the storage tank’s…Design service lifeThe design service life shall be determined by the manufacturer during the design phase and clearly indicated on the product’s design documentation, quality certificate, and equipment nameplate. During procurement and installation, enterprises must carefully verify these documents to confirm the specific design service life of the equipment.

Regulations on Periodic Inspection and Overdue Use

During operation, gas storage tanks must undergo regular inspections in strict accordance with applicable regulations. When a vessel reaches its design service life, it is not necessarily subject to immediate mandatory decommissioning; instead, the following guidelines shall be followed:

• Comprehensive inspection and evaluationThe user unit shall, prior to the equipment reaching its designed service life, apply to a qualified special‑equipment inspection agency for a comprehensive inspection.
• Safety Status RatingThe inspection agency conducts a comprehensive assessment based on the tank’s material aging, corrosion condition, weld quality, and other factors, and assigns a safety status rating.
• Conditions for Deferred Use: If the inspection conclusion is qualified and the safety condition rating meets the criteria for continued use, the equipment may be permitted to remain in service. However, during the extended period of use, it mustShorten the periodic inspection cycleand strengthen routine inspections.

Scrapping and deregistration procedures upon reaching the service life limit

If a gas storage tank fails inspection or the user decides to discontinue its use, it must be scrapped in strict accordance with the prescribed procedures; the transfer or re‑commissioning of such decommissioned equipment is strictly prohibited.

• Destructive processing: Physically destroy decommissioned storage tanks (e.g., by cutting or drilling) to completely eliminate their load-bearing capacity as pressure vessels.
• Process the cancellation procedures.The user shall bring the equipment registration certificate, the scrapping certificate, and relevant supporting documents to the original special equipment safety supervision and administration authority to complete the deregistration procedures.
• Archival Retention: File the equipment’s scrapping records, deregistration certificates, and other relevant documents in the enterprise’s special‑equipment safety management archives for future verification.

Recommendations for Daily Compliance Management in Enterprises

To ensure the safe operation of air compressor storage tanks, enterprises should establish a comprehensive equipment management system:

• Establish an equipment ledger.: Maintain detailed records of each gas storage tank, including its factory‑issued information, design service life, past inspection reports, and maintenance history.
• Establish an early warning mechanism: In the equipment management system, configure service life and inspection‑due‑date alerts to proactively schedule inspections or replacements, thereby preventing equipment downtime or regulatory compliance risks caused by overdue inspections.
• Implement dedicated personnel management.: A safety administrator holding a special equipment operator certificate is assigned to conduct daily inspections of the storage tanks, perform drainage operations, and carry out periodic verification of safety protection devices (such as safety valves and pressure gauges).