Liquefied Natural Gas (LNG) storage tanks are composed of the tank body, instruments, pipelines, valves, etc. These tanks feature two types of liquid entry, from the top and bottom, which can be selected and used according to actual conditions.

The inner tank of the Liquefied Natural Gas storage tank is equipped with a safety system device consisting of double safety valves. In normal operating conditions, one set is in operation while the other is in standby. Should the operating safety valve trip, the manual pressure relief valve is immediately opened to depressurize below the tank's operating pressure. Simultaneously, the safety device is swiftly switched to the standby system via the manual handle, thereby effectively ensuring the tank's safety. This safety system device is composed of safety valves, explosion-proof devices, vent valves, and three-way ball valves, which not only reduces pipeline welding but also has excellent fire and electrostatic protection structures. Additionally, the safety relief ports on the outer shell are fully guaranteed to ensure the overall safety and reliability of the equipment. Low-temperature pipelines are集中引出 for easy operation and control, and the outlet is designed with Duralumin pipe structure to accommodate low-temperature requirements and reduce stress on the pipelines caused by thermal expansion and contraction, ensuring the tank's safety. The vacuum valve utilizes a triple-seal design.OFormed ring seal ensures reliable interlayer sealing, manufactured entirely from stainless steel with a compact design. The top of the liquefied natural gas storage tank features a suspension structure for easy transportation, lifting, and installation. The unique manhole design ensures the cleanliness of the interior when the container is sealed. Vacuum isolation valves and combined vacuum gauges are used on the liquefied natural gas storage tank for easy measurement of the vacuum degree in the interlayer and maintenance, extending the tank's lifespan and improving its quality. The storage tank is equipped with a level gauge and a pressure gauge for local display of liquid level and pressure. The interlayer insulation material is high-quality domestic pearl sand, with the performance parameters of the pearl sand as follows:

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 

3. Inspection, Testing, and Acceptance

1Inspect the inner cylinder material and only use it after it passes the inspection.

2All welds to be inspected.GB150.1～150.4-2011Inspection of standards and drawings required, upon passing inspectionA、BWeld-type seam100Gamma-ray inspectionC、DWeld seam classification100% Permeability Testing with Test Report Issued

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

4After inspection and approval, conduct a pneumatic test and issue a pressure test report. Upon successful pneumatic test, evacuate the system and perform a helium leak test once the vacuum level meets specifications.

5After interlayer leak test passes, fill with pearlescent sand and then evacuate, achieving a vacuum degree ofGB/T18442-2011Standard vacuum degree after sealing and capping.

Section 4: Technical Documents

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

⑴ Certificate of Product Quality for Equipment1Set (provided with equipment)

Including: Certificate of Material for Main Pressure Components, Material List, Structural Dimensions Inspection Report, Inspection Plan, Product Qualification Certificate, Pressure Vessel Product Data Sheet, Welding Records, Non-destructive Testing Report, Pressure Test Report, Special Equipment Manufacturing Supervision and Inspection Certificate (Local Inspection Authority), Product Brand Copy

Completion drawings Various1Piece (provided with the equipment)

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

⑷ User Manual1Piece (provided with the equipment)   

⑸ Equipment process diagrams and basic reference diagrams1Piece (signed contract)7Available today (subject to availability)

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

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