LPG storage tanks include compressed gas or liquefied gas tanks. They can be categorized into fixed-volume and variable-volume tanks based on whether the tank's volume changes. Large fixed-volume LPG tanks are typically spherical, while smaller ones are cylindrical. Variable-volume tanks, also known as low-pressure gas storage tanks or commonly referred to as gas holders, can alter their geometric volume, are sealed tightly to prevent leakage, and serve to balance air pressure and regulate gas supply, with pressures generally not exceeding 60MPa.

Liquefied gas storage tanks undergo strict quality assessment for the material of pressure components, dimensions, weld quality, operational quality, installation quality, internal fittings, and safety accessories.

Routine physical and chemical tests of the drum material, such as mechanical properties and chemical composition.

The welding joints, welds, tank ends, and mutual geometric positions of all pressure components are strictly inspected via X-ray non-destructive testing and magnetic particle inspection. Tests for product sealing, pressure resistance, and all technical indicators that could affect the safe operation of the product.

Liquefied gas storage tanks are pressure vessels and are required by the state to be inspected annually (with a recommended service life of 10 years for simple pressure vessels). Since inspections are conducted, there are products that pass or fail. Generally, due to improper usage or inadequate maintenance, businesses may find their liquefied gas storage tanks fail inspection and must be decommissioned. As storage tanks are special equipment, decommissioning requires a specific process. Although air compressor liquefied gas storage tanks are generally considered safe special equipment, they can also explode due to improper manufacturing, design, installation, or management. Therefore, we must follow the operation procedures for air compressor liquefied gas storage tanks, avoid shortcuts, and never purchase inexpensive, unqualified storage tanks. Tanks with 1 cubic meter and 10 kg capacity or less are classified as simple pressure vessels and do not require inspection; according to national regulations, they are exempt from inspection for the first 7 years from the date of manufacture on the label, but this applies only to the tank itself.

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