LPG storage tanks include compressed gas or liquefied gas tanks, which can be divided into fixed-volume and variable-volume tanks based on the tank's volume. 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 change their geometric volume, are airtight to prevent leaks, and serve to balance air pressure and regulate gas supply volume, with pressure generally not exceeding 60MPa.
Liquefied gas storage tanks undergo rigorous quality assessment for the material of pressure components, exterior dimensions, weld quality, operational quality, installation quality, internal fittings, and safety accessories.
Routine physical and chemical tests for the material of the container, such as mechanical properties and chemical composition.
Rigorous X-ray non-destructive testing and magnetic particle inspection are conducted on the welding joints, welds, tank heads, and the mutual geometric positions of all pressure elements. Tests for the product's sealing, pressure resistance, and all technical indicators that could affect the safe operation of the product.
1. Safe Operation of LPG Storage Tanks - To prevent over-temperature and over-pressure phenomena in LPG storage tanks, the usage pressure and temperature should be controlled. The causes of over-temperature and over-pressure in LPG storage tanks include the following:
(1) Operation Errors To prevent operation errors, labels should be hung on critical operation devices, clearly marked with symbols or text indicating the opening and closing directions of valves, their states, precautions, etc.
(2) Excessive Filling of Liquefied Gases: Preventive measures include strictly filling according to the specified storage quantity; if over-filling is detected, the excess should be immediately removed; all gauges used for filling must be regularly inspected; the liquid level gauges should be periodically flushed; any remaining liquid in the container should be included in the filling quantity; its weight should not be neglected; when the surrounding temperature rises, spraying for cooling should be conducted.
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