Design and manufacture of various liquefied gas storage tanks, factory price of LPG storage tanks, Shandong manufacturer

Description :

　　Inspection of liquefied gas storage tank products

　　1) Annual inspection

　　The user of this product shall conduct an annual inspection of the pressure vessel, which shall include at least an inspection of the safety management of the pressure vessel, an inspection of the pressure vessel body and operation status, and an inspection of safety accessories. The safety hazards of pressure vessels discovered during annual inspections should be promptly eliminated.

　　2) Regular inspection

　　The user of this product shall submit a request for regular inspection to the special equipment inspection agency one month before the expiration of the validity period of the regular inspection of the pressure vessel.

　　The user shall submit the conclusion report to the registration authority for filing, and strictly control the product in accordance with the requirements of the inspection report

　　Liquefied gas storage tankIt is a storage of liquid petroleum gas, belonging to the third category of pressure vessels, and an important component of liquefied gas stations. Liquefied gas storage stations are composed ofLiquefied gas storage tankComposed of hydrocarbon pumps, compressors, filling systems, sprinkler systems, fire protection systems, etc. The scale of liquefied gas stations, the transportation methods, loading and unloading methods, and bottle filling methods of liquefied petroleum gas are different, and the process flow of storage and distribution stations is also different. The process flow usually adopts hydrocarbon pumps, compressors, or a combination of hydrocarbon pumps and compressors. Large storage and distribution stations generally use mechanized and automated filling and transportation equipment, and usually adopt a process flow of hydrocarbon pump compressor joint operation, that is, unloading with compressor and filling with hydrocarbon pump. In order to complete tasks such as unloading train tank cars, filling bottles, and filling car tank cars, the liquid phase pipe of the unloading wharf of the train tank car is connected to the liquid phase inlet pipe of the storage tank; The suction port of the hydrocarbon pump is connected to the liquid phase outlet pipe of the liquefied gas storage tank, while the outlet of the hydrocarbon pump is connected to the liquid phase pipe of the bottle filling workshop and the liquid phase pipe of the truck tanker loading and unloading platform. All liquid phase pipelines of the storage and distribution station are interconnected to form a unified liquid phase pipeline system.

　　The gas phase pipes of the train tanker unloading wharf, truck tanker loading and unloading platform, liquefied gas storage tank, liquefied gas residual tank, and residual liquid emptying rack in the storage and distribution station are connected to the suction and exhaust main pipes of the compressor through a gas phase valve group, forming a unified gas phase system. Using a compressor, the gas phase can be extracted from any liquefied petroleum gas storage tank and sent to other liquefied gas storage tanks, train tankers, or truck tankers.

　　By using the above-mentioned liquid and gas phase pipeline systems and valves, the following operations can be completed: loading and unloading of train and car tank trucks, filling and pouring of liquefied gas storage tanks, filling of steel cylinders, and pouring out of residual liquid in steel cylinders. The liquefied petroleum gas in steel cylinders and tank trucks is filled using hydrocarbon pumps, or it can be filled by pressurizing the liquefied petroleum gas storage tank with a compressor (pumping from other liquefied petroleum gas storage tanks).

　　When using a hydrocarbon pump for filling, it is not allowed for the liquid phase to circulate multiple times inside the hydrocarbon pump, as this can cause overheating of the liquid phase, leading to the formation of an "air blockage" inside the hydrocarbon pump and disrupting its operation. Therefore, a safety bypass reflux valve is installed in the system, which can automatically discharge excess liquid phase into the reflux pipe and flow back to the liquefied gas storage tank.

　　Due to the operation of gas-phase pipelines under varying temperatures and pressures, condensation (i.e. liquid phase) may occur inside the pipes. To avoid bringing impurities and moisture from the liquid phase and liquefied petroleum gas into the compressor cylinder, a gas-liquid separator should be installed on the compressor inlet pipe. Installing an oil and gas separator on the outlet pipe of the compressor is to prevent gaseous liquefied petroleum gas from carrying lubricating oil out of the cylinder and contaminating other equipment.East liquefied gas storage tank manufacturer LPG liquefied petroleum gas storage tank prices are low

　　Liquefied gas storage tankIt is a storage pressure vessel and should also be manufactured, tested, and accepted in accordance with GB150 "Steel Pressure Vessels"; And accept the supervision of the "Regulations on Safety Technology Supervision of Pressure Vessels" (referred to as the "Regulations") issued by the Ministry of Labor.LPG storage tankIt mainly consists of a cylinder, a head, a manhole, supports, and various connecting pipes.Liquefied gas storage tankThere are liquid phase pipes, gas phase pipes, sewage pipes, as well as pressure gauges, thermometers, liquid level gauges, etc.

　　1.1 Design pressure of liquefied gas storage tank

　　The design pressure is determined based on the work pressure, and the principle is based on the hazardous operating conditions. Usually 1.05-1.1 times the work pressure is selected, and 1.1 is chosen for this design,

　　This storage tank is used for the storage of liquefied petroleum gas and is at room temperature. The working pressure is the saturated vapor pressure of the medium at the corresponding temperature. The saturated vapor pressure of propane can be selected as the main component. Therefore, the saturated vapor pressure of propane at 50 ℃ is taken as the working pressure. According to the table above, the saturated vapor pressure of propane at 50 ℃ is 1.710MPa. Therefore, the gauge pressure is 1.710-0.1=1.610MPa, and the design pressure is 1.610x1.1=1.77MPa.

　　1.2 Design temperature of LPG storage tank

　　Design temperature refers to the metal temperature of the components set for the container under normal operating conditions. Its value must be greater than or equal to the normal operating temperature. Due to the working environment outside Jingmen, the design temperature is set at 54 ℃.

　　. 3 Selection of materials for liquefied petroleum gas storage tanks

　　The correct selection of materials is crucial for the safe operation of equipment and reducing production costs. The materials used for pressure vessels include pressure shells and equipment components, as well as pressure and non pressure components, including steel plates, steel pipes, steel bars, etc.

　　Pressure vessels are formed and welded from steel plates. Flanges can be made of steel plates or forgings depending on the situation. Bolts and nuts are made of steel bars. The support should be made of steel or steel pipe. Common carbon steel and low-alloy steel include Q245R, Q345R, etc. Seamless steel pipe materials include: 10Mn, 16Mn, etc.

　　For this storage tank, the design pressure is medium pressure and the temperature range is -20-50. Based on the comprehensive equipment structure, process, and working conditions, referring to GB713-2008 and checking Table 2 of "Steel Plates for Boilers and Pressure Vessels", Q345R material can be selected. Density ρ=785kg/m3, allowable stress [σ]=189MPa. Steel pipe materials such as 16Mn can be selected

　　According to JB/T 4732, Q235-A can be used as the support material, and Q235 can be selected for the anchor bolts and nuts according to GB/T700-2007 regulations.

　　companyWe are a domestic manufacturer of pressure vessels (5-200 cubic meters of liquefied gas storage tanks, liquefied natural gas storage tanks, low-temperature oxygen nitrogen argon storage tanks, liquid carbon dioxide storage tanks, etc.), with qualifications for the production and manufacturing of Class I, II, and III pressure vessels.

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