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) Operator Error To prevent operator error, warning signs should be posted on critical operation devices. These signs should clearly mark the opening and closing directions of valves, their on/off status, and precautions.
(2) Overfilling of Liquefied Gases Preventive measures against overfilling include: strictly filling according to the specified storage capacity; upon discovering overfilling, immediately attempt to remove the excess; all gauges used for filling must be regularly inspected; the level gauge should be flushed regularly; if there is any residual liquid inside the container, it should be included in the filling quantity; the weight should not be ignored; when the surrounding temperature rises, spray cooling should be performed.
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LPG storage tanks include compressed gas or liquefied gas tanks. They can be categorized into fixed-volume and variable-volume tanks based on the tank's capacity. Large fixed-volume LPG tanks are typically spherical, while smaller ones are cylindrical. Variable-volume storage tanks, also known as low-pressure gas tanks or commonly called gas holders, can change their geometric volume, are airtight to prevent leaks, and serve to balance pressure and regulate gas supply. The pressure is usually not more than 60MPa.
Liquefied gas storage tanks undergo stringent quality assessments for the material of pressure components, exterior dimensions, weld quality, operational quality, installation quality, internal equipment, and safety accessories.
Routine physical and chemical tests for the material of the drum, such as mechanical properties and chemical composition.
The weld joints, weld seams, tank end caps, and the mutual geometric positions of all pressure elements are strictly inspected through X-ray non-destructive testing and magnetic particle inspection. Testing and verification of the product's sealability, pressure resistance, and all technical indicators that could affect the safe operation of the product.
