Low-temperature storage tanks are primarily used in the industrial gas sector, with a vast range of applications. Industries such as steel mills, chemicals, oil, food, and aerospace all require gases. Industrial gases like oxygen, nitrogen, and argon, which are in high demand, are separated from air using air separation equipment. The air is compressed and liquefied, then separated based on the different boiling points of oxygen, nitrogen, and argon, before being stored in low-temperature storage vessels.

    Liquefied Natural Gas (LNG)The tank features a long service life, compact structure, minimal land occupation, centralized control, ease of operation and maintenance, and is a double-layer fixed vacuum powder insulation low-temperature storage tank. The inner tank is made of stainless steel.,Outer shell materialQ235BOr16MnRThe liquid oxygen tank surface is coated with an anti-corrosion layer using sandblasting, sweeping, and spraying techniques, while a two-component rapid curing liquid paint is also employed.

Liquefied Natural Gas (LNG) storage tanks consist of the tank body, instruments, pipelines, valves, etc. These tanks are designed with two types of liquid inlet methods, upper and lower, allowing for selection based on actual conditions.

The inner tank of the Liquefied Natural Gas (LNG) storage tank is equipped with a safety system device featuring dual safety valves. Under normal operation, one set is in active mode while the other is on standby. If the active safety valve trips, the manual pressure relief valve is immediately opened to release pressure to the highest working pressure of the tank. Simultaneously, the safety device is swiftly switched to the standby system via the manual handle, effectively ensuring the tank's safety. This safety system device consists of safety valves, explosion-proof devices, vent valves, and three-way ball valves, not only ensuring pipeline welding quality but also boasting excellent fire and static electricity prevention structures. Additionally, the safety relief openings on the outer shell are designed to ensure the overall safety and reliability of the equipment. The low-temperature pipelines are集中引出 for operation and control, with the outlet using Duralumin pipe structures to accommodate low-temperature requirements and reduce stress caused by thermal expansion and contraction, ensuring the tank's safety. The vacuum pump valve is sealed with three "O" rings, effectively guaranteeing the reliability of the sandwich seal, and is made of full stainless steel with a compact design. The top of the LNG storage tank features a research and developed suspension structure for easy transportation, lifting, and installation. The unique process manhole design ensures the cleanliness of the inner tank when sealed. Vacuum isolation valves and combined vacuum gauges are used on the LNG storage tank for measuring and maintaining the vacuum level of the tank's sandwich, extending the tank's lifespan and enhancing its quality. The LNG storage tank is equipped with a level gauge and pressure gauge for local display of liquid level and pressure.

LNG storage tanks are composed of the tank body, instruments, pipelines, valves, etc. These tanks feature both upper and lower liquid inlet methods, which can be selected and used according to actual conditions.

The inner tank of the Liquefied Natural Gas (LNG) storage tank is equipped with a safety system device featuring dual safety valves. Under normal operating conditions, one set is in operation while the other is on standby. If the safety valve in operation trips, the manual pressure relief valve is immediately opened to release pressure 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 device consists of safety valves, explosion-proof devices, vent valves, and three-way ball valves, not only reducing pipeline welding but also offering excellent fire and static electricity prevention structures. Additionally, the safety relief openings on the housing are fully guaranteed to ensure the entire equipment's safety and reliability. The low-temperature pipelines are集中引出 for ease of operation and control, and the outlet is designed with a Duralumin pipe structure to meet low-temperature requirements and minimize pipeline stress caused by thermal expansion and contraction, ensuring the tank's safety. The vacuum pump valve is equipped with three levels of "OFormed ring seal ensures reliable interlayer sealing, made entirely of stainless steel with a compact size. The top design of the liquefied natural gas tank features a suspended structure for easy transportation, lifting, and installation. The unique manhole design ensures internal cleanliness when the container is sealed. Vacuum isolation valves and combined vacuum gauges are used on the liquefied natural gas tank for easy measurement of the interlayer vacuum and maintenance, extending the tank's lifespan and improving its quality. The tank is equipped with a level gauge and pressure gauge for local display of liquid level and pressure. The interlayer insulation 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 (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 before use.

2All welds to be inspectedGB150.1～150.4-2011Inspection of standards and drawings required, upon passing inspectionA、BWeld-like seam100%Gamma-ray inspectionC、DWeld-like seam100% Permeability inspection with a test report issued

3After the cylinder assembly is completed, 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, and upon reaching the required vacuum level, perform a helium leak test.

5After the interlayer leak test passes, fill with pearl sand and then perform vacuum extraction; the vacuum degree reachesGB/T18442-2011Standard requirement for post-sealing vacuum degree.

Section 4: Technical Documents

1Upon contract signing, the seller shall provide the buyer with the following technical documents:

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

Including: Material Certificate 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

As-Built Drawings Various1Piece (supplied with the equipment)

Section 3: Strength Calculation Sheets1Piece (supplied with the equipment)

⑷ User Manual1Pack (provided with the equipment)   

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

⑹ Certificate of Conformity for accessory products, instrument calibration report 1Pack (supplied with the equipment)