LNG Cryogenic Storage Tanks
Function: Used for LNG liquid storage.
Appearance: vertical storage tank, horizontal storage tank
Insulation material: vacuum powder (cinnabar sand); wrap-around (glass fiber)
Daily transpiration rate: <0.3%
Planned maximum working pressure: 1.2MPa
Safety valve opening pressure: 1.25MPa
Pressure resistance: <1.6MPa
Planned temperature: -196℃
Working temperature: -162℃
Precautions for the use of storage tanks:
1. For storage tanks with double root valves, the valves close to the storage tank should be normally open.
2. When unloading the truck, it is recommended that the limit filling capacity of the storage tank should not exceed 90% of the effective volume (the manufacturer gives it as 85%-95% of the geometric volume), and the operating margin should not be less than 10%.
3. When the pressure of the storage tank is high, it is not necessarily a problem with the storage tank. The heat leakage and liquid storage time of the whole system should be considered. Generally, when the pressure exceeds 1.1MPa, it is necessary to discharge and relieve the pressure. The lng gas station equipment manufacturer reminds If the storage tank is under high pressure for a long time, it will affect the life of the interlayer vacuum of the storage tank.
4. When a large amount of long-term sweating or frosting occurs in the storage tank, and the pressure continues to rise rapidly, the vacuum failure should be considered, and urgent treatment should be carried out, manual pressure relief, and transfer of the LNG liquid in the tank.
5. The storage tank is recommended to be tested for vacuum every other year. When the storage tank is a hot tank, the vacuum degree is less than 1pa, and when the storage tank is a cold tank, the vacuum degree is less than 0.5pa (0.00375TOF), which is qualified.
6. The storage tank cannot be transported with liquid, and the LNG liquid in the tank should be discharged when it is out of use for a long time.
7. Storage tanks are pressure vessel equipment. According to the requirements of the “Pressure Vessel Safety Skills Supervision Regulations” promulgated and implemented by the People’s Republic of China, the installation, repair and modification of pressure vessels must be notified to the local quality inspection department by a qualified unit and approved. Only after installation, repair and modification can be carried out.
The above is an analysis of the related use matters of lng storage tanks. Wuxi Hansheng Pressure Vessel Industrial Co., Ltd. specializes in the transportation of liquid oxygen, liquid nitrogen, liquid argon, liquid carbon dioxide and liquefied natural gas (LNG) and other cryogenic liquid storage tanks and tankers. It is safe, fast and efficient. Welcome to consult and cooperate.
Post time: Jun-24-2022