I. Equipment manufacturing meets the following regulations and standards:
1、TSG 21-2016Regulation for Safe Supervision of Fixed Pressure Vessels
2、GB150.1～150.4-2011"Pressure Vessel"
3、NB/T47014-2011"Welding Process Evaluation for Pressure Equipment"
4、NB/T47015-2011"Pressure Vessel Welding Procedure Specification."
5、GB/T25198-2010"Pressure Vessel Head"
6、NB/T47013-2015Non-Destructive Testing for Pressure Equipment
7、NB/T47016-2011"Mechanical Property Testing of Welded Specimens for Pressure Equipment Products."
8、JB/T4711-2003"Coating and Packaging for Pressure Vessels"
9、GB/T18442-2011"Fixed Vacuum Insulated Cryogenic Pressure Vessel"
II. Description of Equipment Features, Performance, and Structural Parameters
1Equipment Features
Liquefied natural gas tanks are horizontal, double-layered cylindrical vacuum powder-insulated structures, with the inner cylinder containingLNGMaterial:S30408The head is made of a standard elliptical head, with the outer cylinder facing the atmosphere, and the material isQ345RLow-alloy steel, with an octagonal support structure between the inner and outer cylinders. Insulation thickness250mmThe inner and outer tube sandwich is filled with thermal insulation material pearl sand and vacuumed, with the pressure between the inner and outer layers being absolute pressure ≤5PaThe vacuum level at the factory exceeds national standards, ensuring the evaporation rate criteria; the storage tank is equipped with a complete set of operation valves and gauges. These valves and gauges enable on-site observation of liquid inflow and outflow, as well as pressure and level.
2Performance and structural parameters
Liquefied Natural Gas (LNG) storage tanks consist of the tank body, instruments, pipelines, valves, etc. These tanks are designed with two 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 depressurize below the tank's maximum 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, not only reducing pipeline welding but also offering excellent fire and static electricity prevention structures. Additionally, the safety relief openings on the outer shell are fully guaranteed to ensure the entire equipment's safety and reliability. The low-temperature pipelines are centrally extracted for ease of operation and control, and the extraction outlet features a DuraTube structure to meet low-temperature requirements and minimize pipeline stress due to thermal expansion and contraction, ensuring the tank's safety. The vacuum relief valve employs a triple safety mechanism.OThe form seal effectively ensures the reliability of the sandwich seal, and it is made of full stainless steel with a compact size. The design of the liquefied natural gas (LNG) storage tank top incorporates a suspended 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 valves with vacuum gauges are used on the LNG storage tank, facilitating the measurement and maintenance of the vacuum degree in the sandwich, extending the tank's lifespan, and improving its quality. The LNG storage tank is equipped with a level gauge and a pressure gauge for local display of the liquid level and pressure. The sandwich insulating material is high-quality domestic pearl sand; the performance parameters of the pearl sand are as follows:
Serial Number | Indicator Name | Unit | Benchmark |
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, and it can be put into use only after passing the inspection.
2All welds are to be inspected.GB150.1～150.4-2011Inspection of standards and drawings is conducted; upon passing the inspection.A、BWeld-like seam100%Gamma-ray inspectionA、B、C、DWeld seam type100Permeability testing with a report issued
3After the cylinder assembly is completed, proceed to...GB150.1～150.4-2011Inspection of geometric dimensions, pipe end orientations, and shape deviations according to standards and drawings.
4After inspection, conduct a pneumatic pressure test and issue a pressure test report. Once the pneumatic pressure test passes, vacuum the product, and after achieving the required vacuum level, perform a helium leak test.
5After interlayer leak test passes, fill with pearl sand and then vacuum pump, achieving vacuum degree ofGB/T18442-2011Standard requirements for the sealed vacuum degree.
IV. Technical Data
1After the contract is signed, the seller shall provide the following technical documents to the buyer:
Certificate of Product Quality for 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 Reports, Pressure Test Reports, 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 Sheets1Each (supplied with the equipment)
⑷ User Manual1Each (provided with the equipment)
Equipment process diagram and basic reference diagram1Piece (Contract)7Available today (if applicable)
⑹ Certificate of Conformity for accessories, Instrument Calibration Report 1Pack (supplied with the equipment)
5. Quality Assurance, After-Sales Service, Technical Support
1The equipment's performance meets the user's requirements and ensures normal operation within the process range.
2Valves and instruments on storage tanks come with a one-year warranty, during which free service and repairs are provided, and damaged parts are replaced at no cost. The equipment warranty period is from the date of delivery.12Months.
3During the warranty period, if there is an issue with our manufactured equipment on-site: If the issue is due to manufacturing defects, we will address it upon receiving formal notification from the customer within normal working hours.2Hourly Response24Technicians will arrive on-site within hours to address the issue. Service personnel will not leave until the fault is resolved. Parts replacement is free within the warranty period; beyond that, only cost-based fees will be charged.
4During equipment operation, in case of a malfunction, the seller shall first address the issue, then determine the responsibility, with the principle of ensuring normal equipment operation.
Lifetime technical consultation provided by the supplier, ready to answer any questions from users at any time.
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