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Operation manual of LPG storage tank manufactured by Chengl
Release time:2018-08-25 16:08 Editor:truckdf From:Chengli



Operation manual of LPG storage tank manufactured by Chengli Special Automobile CO., Ltd. in China 
 
Warning
Before using the storage tank, the safety accessories must be assembled with the tank for air tightness test and do the nitrogen replacement for the tank with a pass result.
 
1, Summery
 
The horizontal tank is the special equipment used for storage of liquefied petroleum gas(Lpg) when the saturated vapor pressure is less than 1.77Mpa at the temperature 50℃ anf the safet storage is 19.95tons. The storage tank is designed according to the TSG 21-2-16 “stationary Pressure Vessels Safety and Technical Supervision Regulation” and requirements of GB/T 150 “Pressure Vessel”. Manufacturers should have the A2 level manufacturing license issued by the state administration of quality supervision, inspection and quarantine administration of boiler and pressure vessel. At any time, the factory should accept the inspection and supervision by the boiler pressure vessel examination board in local technical supervision bureau in the process of design, fabrication, inspection, delivery and any other report with the built drawings, product quality certificate, certificate of quality, brand extension and design calculation and other technical information issued by manufacturers should be given to users. Users with the above date go to register in the local boiler pressure vessel inspection agencies. Products can be put into use after getting the registration number.
 
Technical feature:
Design Standard
 “Pressure Vessel Safety Technology and Supervision Code”

“Pressure Vessel” (GB/T150) 
“Horizontal Vessel”(NB/T47042)
Other related rules, regulations and standard, etc.
 
Safety accessories adjustment and tank installation
 
Users must equip the tanks with safety accessories matching the technical parameters according to the standard. Safety accessories must conduct re-inspection before equipping on the tank. Adjusting must follow provisions of general layout design. Safety accessories installation organization must have related qualified certificate.
 
In tank installation, base surface of the tanks should be not less than 1m above the ground. Base surface should install base plate. Base installation for embedded anchor bolts is as below

 
Base installation surface should be titled after finish base installation, making sure the tank will be tilted. The slope is 3/1000. The drain hole is one the lowest end.
 
To keep the tank move freely in axial direction, double nuts are used for locking as above. After the lower nut was totally tighten firstly, then loose the nuts be one thread, in this way the base plate can slightly slide in axial direction. In bolts installation, to make sure each bolts have at least 10mm space to allow the nuts installation. The stationary saddle should be directly tightened by nuts. Grounding line on the saddle should be well grounding.
 
Key point for equipment safety usage.
Before LPG filling, tank must be conducted nitrogen replacement to ensure safety. The oxygen content in the tank must be lower than 3%.
Safety valves should be tightly closed under normal working conditions. The safety valve opens automatically when the tank overloads, environment temperature rises sharply, fire occurs or any other reasons, which makes the tank pressure exceeds the relief valve sealing pressure. When the safety valve relief pressure, the relived liquid or gas should be recycled or discharged into the air through the safety valve outlet pipe.
 
A cut off valve should be installed between safety valve and the tank, to prevent safety valve failure which means it cannot be closed and leads to large leakages. Then close the cut off valve and replace the safety valve. The cut-off valve is fully open during normal working and closed only when replacing the safety valve.
 
The seal of the safety valve device shall not be arbitrarily opened, if needs to re-debug, it must be adjusted by the approval organization by the national technology supervision agency.
 
On pressure gauge dial, a red line should be printed at design pressure value. An cut-off valve should be installed between pressure gauge and tank. Under normal working conditions of tank, the valve should be fully open, when replacement or testing pressure gauge, the cut off valve needs to be closed.  
 
On magnetic level gauge dial, a redline should be printed at the maximum filling height. When installation, the tank is completely empty, so the level gauge should be in zero position. a cut off valve should be installed between the level gauge and tank,  which is fully open during normal working, only closed the cut off valve in replacement of magnetic level gauge.
 
On temperature gauge dial, a red line should be printed at the design temperature 50℃. Between 40℃ and 50℃, it should be coated in yellow color.  
 
The lowest pressure in the tank in the process of using shall not less than 0.05Mpa, which is to prevent the air flow into the tank.
 
Operation management and maintenance
Users of the storage tanks must follow the rules of the “Pressure Vessel Safety and Technical Supervision Regulation” and other relevant laws and regulations strictly for safety technology management and prohibit overloading, over temperature and overpressure to ensure the security usage of the tank.
 
Technical director of users us responsible for the pressure vessels safety and technical management, and specify the professional technical personnel for the daily technical management of the pressure vessel.  
 
Tank operations should be tested and approved by the safe education training and get related certificates.
 
Cooling measures must be taken when any of the following circumstance occurs.
a, the pressure gauge indicating the value gets close to the red line, or the pressure is keep increasing.
b, the temperature gauge indicate the value reached the yellow warning signs.
 
When the tank pressure meet the design pressure value( the red line indicated value) and the safety valve does not open, the operator should take immediate measures to reduce the pressure of the tank first, then close the cut off valve under safety valve for maintenance calibration, and rapid installation of the safety valve to let the tank back to normal working condition.
 
The storage tank should be tested regularly in accordance with the related rules in “Pressure Vessel Safety Technology and Supervision Code”.


Chengli Special Automobile Co., Ltd. is the leading manufacturer and supplier of lpg gas pressure vessels in China. With many years’development, Chengli Special Automobile Co., Ltd. can supply surface lpg gas storage tank(5m3-200m3), underground lpg gas storage tank(10m3-80m3), lpg gas trailer(40,5m3-59.6m3), lpg gas truck(5m3-35.5m3), skid lpg gas plant(5-120m3), etc.And in 2016s, we have achieved the US ASME certificate for lpg gas pressure vessels, meaning we can design and mnufacture ASME standard lpg gas pressure vessels in our company and exporting, too. 

More information, please feel free to contact with Ms. Anita. The hot sale line is 0086 13886878855. 

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