The liquefied natural gas (LNG) storage tank consists of the tank body, instruments, pipelines, valves, etc. The LNG storage tank employs two liquid inlet methods: from the top and bottom, which can be selected and used as per actual conditions.

The inner tank of the Liquefied Natural Gas storage tank is equipped with a safety system consisting of dual safety valves. Under normal operating conditions, one set is in operation while the other is on standby. If the operating safety valve trips, the manual pressure relief valve is immediately opened to depressurize below the tank's working pressure. Simultaneously, the safety device is swiftly switched to the standby system via the manual handle, effectively ensuring the tank's safety. This safety system consists of safety valves, explosion-proof devices, vent valves, and three-way ball valves, which not only reduces pipeline welding but also features excellent fire and static electricity prevention structures. Additionally, the safety relief openings on the shell are fully guaranteed to ensure the entire equipment's safety and reliability. The low-temperature pipelines are集中引出 for easy operation and control, and the outlet is designed with a Duralumin structure to meet low-temperature requirements and reduce pipeline stress caused by thermal expansion and contraction, ensuring the tank's safety. The vacuum evacuation valve is equipped with three levels of safety.O"Formed ring sealing ensures the reliability of the sandwich seal, and is made of full stainless steel with a compact design. The top design of the liquefied natural gas tank features a suspended structure for easy transportation, lifting, and installation. The unique manhole design guarantees the cleanliness of the interior when the container is sealed. Vacuum isolation valves and a combined vacuum valve with vacuum gauges are used on the liquefied natural gas tank, facilitating the measurement and maintenance of the vacuum level in the sandwich, extending the tank's lifespan and enhancing its quality. The tank is equipped with a level gauge and a pressure gauge for local display of liquid level and pressure. The sandwich insulating material is high-quality domestic pearl sand, with the following performance parameters of the pearl sand:"

Serial Number Indicator Name Unit Index 

1 Loose Bulk Density Kg/m3 50－60 

2 Particle size mm 0.1－0.2 Not less than80% 

3 Thermal Conductivity (at atmospheric pressure),Temperature310-77k） W/m.k.s ＜0.026 

4 Moisture Content(Weight) % ＜0.1 

5 Unexpanded Rate % ≤1 

6 Temperature ℃ －200℃～600℃ 

7 PHValue   6.5～7.5 

Section 3: Inspection, Testing, and Acceptance

1Inspect the inner cylinder material; usage is permitted upon passing the inspection.

2All welds are subject toGB150.1～150.4-2011Inspection of standards and drawings is conducted; upon passing the inspection.A、BWeld seam classification100% Gamma-ray inspectionC、DWeld-like seam100Percent penetration testing with a corresponding test report issued

3After the cylinder assembly is complete, proceed as follows:GB150.1～150.4-2011Standards and drawings require inspection of geometric dimensions, pipe end orientations, and shape deviations.

4After inspection, conduct a pneumatic test and issue a pressure test report. Upon passing the pneumatic test, evacuate the air. Once the vacuum level meets the requirements, perform a helium leak test.

5After interlayer leak test passes, fill with pearlescent sand and then vacuum, achieving a vacuum degree ofGB/T18442-2011Standard requirement for the sealed vacuum degree.

Section 4: Technical Documents

1After the contract is signed, the seller shall provide the following technical data to the buyer:

Certificate of Product Quality for the equipment1Set (provided with equipment)

Including: Material Certification for Main Pressure Components, Bill of Materials, Structural Dimension Inspection Report, Inspection Plan, Product Compliance Certificate, Pressure Vessel Product Data Sheet, Welding Records, Non-Destructive Testing Report, Pressure Test Report, Supervision and Inspection Certificate for Special Equipment Manufacturing (Local Inspection Authority), Product Brand Copy

Completion drawings Various1Piece (supplied with the equipment)

Section 3: Strength Calculation Sheets1Pack (supplied with the equipment)

⑷ Instruction Manual1Piece (supplied with the equipment)   

Equipment process diagram and basic reference diagram1Per Unit (Contract Signing)7Available today)

⑹ Certificate of Conformity for matching products, Instrument Calibration Report 1Piece (supplied with the equipment)

Cautionary Notes

1. Cylinders must be stored in well-ventilated areas, with a distance of no less than 1.5 meters from any flame or heat source. Cylinders are strictly prohibited from being heated with fire, scalded with boiling water, or exposed to direct sunlight. Regular inspections should be conducted on cylinder valves and pipeline joints to ensure airtightness and prevent leaks. Leak detection can be performed using soap water, but using an open flame for testing is strictly forbidden.

2. When lighting, ignite the primer first, followed by opening the gas; do not reverse the order. There should be someone present to supervise during use, and do not leave the area to prevent boiling water from overflowing and extinguishing the flame, which could cause the escaping gas to ignite and explode. After using the gas cylinder, make sure to close the valve tightly to prevent gas leakage.

3. The liquefied gas inside the cylinder should not be completely exhausted; a certain residual pressure should be maintained. The residual pressure should generally be greater than 49.03 kPa (i.e., 0.5 kg/cm2, gauge pressure) to prevent air from entering the cylinder. After the liquefied petroleum gas is used up, the remaining residue inside the cylinder is also a flammable substance and should not be poured out arbitrarily to avoid fires caused by the flow and evaporation of the residue.

4. LPG cylinders are pressurized containers that require proper maintenance and regular inspections. During handling and use, prevent the cylinder from falling or being struck. Do not use metal tools to敲击 open the valve. Protect from direct sunlight and prolonged exposure to rain. Cylinders are typically inspected every 2 years.

5. Although the explosive range of liquefied petroleum gas (LPG) is not very wide, its lower limit is small, making it easy to ignite and explode upon leakage. Moreover, as LPG is heavier than air, it tends to flow downward upon leakage in the air, accumulating in low-lying areas and posing a hidden danger of gas explosion. Therefore, in areas prone to gas leakage, relying solely on window ventilation is insufficient; attention must also be given to lower-level ventilation.

6. When liquid gas leakage is detected indoors, promptly open windows and doors for ventilation, allowing it to disperse towards a direction without open flame. Strictly prohibit any fire-making activities nearby. Use the product only after the fault is rectified and the distinctive odor has dissipated. Dispose of any leaked liquid on the ground by covering it with sand and soil before removing it to a safe location. In case of a gas cylinder fire, immediately close the valve, move it to an open area outdoors, and extinguish the fire using dry powder extinguishers, CO2 extinguishers, or by covering it with a wet sack.

7. Educate children not to tamper with gas cylinders carelessly, and users must be aware of the safety knowledge for using gas cylinders.