The Liquefied Natural Gas (LNG) storage tank is composed of the tank body, instruments, pipelines, valves, etc. The LNG storage tank features two liquid inlet methods, top and bottom, which can be chosen and used according to the actual situation.
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 and the other in standby. If the safety valve in operation trips, the manual pressure relief valve is immediately opened to relieve pressure below the tank's operating pressure. Simultaneously, the safety device is swiftly switched to the standby system using 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 featuring excellent fire and static electricity prevention structures. Additionally, the safety relief ports set on the housing are fully guaranteed to ensure the entire equipment's safety and reliability. Low-temperature pipelines are集中引出for ease of operation and control, and the outlet is structured with Duralumin pipes 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 employs a triple-sealed design.OThe shape ring 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 storage tank features a suspension structure at the top 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 regulators are used on the liquefied natural gas storage tank for easy measurement and maintenance of the sandwich vacuum degree, extending the lifespan of the tank and enhancing its quality. The tank is equipped with a level gauge and pressure gauge for on-site display of liquid level and pressure. The sandwich insulation material is high-quality domestic pearlescent sand, with the performance parameters of the pearlescent 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 PHPlease provide the Chinese content to be translated into American English. 6.5～7.5
Section 3: Inspection, Testing, and Acceptance
1Inspect the inner cylinder material and use it only after passing the inspection.
2All welds shall be inspected.GB150.1～150.4-2011Inspection of standards and drawings is conducted; upon passing inspectionA、BWeld seam classification100Percent-ray detectionC、DWeld-like seam100Permeability testing with a certificate of inspection provided
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, conduct a pneumatic test and issue a pressure test report. Upon passing the pneumatic test, evacuate the vacuum. Once the vacuum level meets the requirements, perform a helium leak test.
5After interlayer leak test passes, fill with pearlescent sand and then evacuate, 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 buyer with the following technical information:
⑴ Product Quality Certificate for the Equipment1Set (supplied with equipment)
Including: Material Certificate for Main Pressure Components, Bill of Materials, Structural Dimensions Inspection Report, Inspection Plan, Product Compliance 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
As-Built Drawings Various1Piece (supplied with the equipment)
Section 3: Strength Calculation Sheets1Piece (supplied with the equipment)
④ User Manual1Each (provided with the equipment)
Equipment process flow diagrams and basic reference diagrams1Piece (Contract)7Available today)
⑹ Certificate of conformity for accessories, instrument calibration report 1Piece (provided with the equipment)
This product is a horizontal fixed vacuum powder insulation low-temperature storage tank, featuring a double-layer cylindrical structure. The inner container is used for storing low-temperature liquid natural gas, while the outer shell forms and protects the vacuum insulation space. The intermediate layer is filled with pearl sand and evacuated to create an effective insulation system. The design of the outer shell and support system is capable of withstanding the relevant external forces during manufacturing, transportation, installation, and use. The tank bottom is equipped with a complete set of valves, instruments, and safety devices for operation.
Safety:
One, stainless steel plates are purchased from Taiyuan Iron and Steel Plant, the leading manufacturer of stainless steel plates in China, ensuring quality. The tubing is sourced from Anhui Tianda Steel Tube, the top supplier of domestic stainless steel seamless tubes.
Two, materials are all in compliance withGB150-2011The "Pressure Vessel" undergoes re-inspection; material cutting is performed using a CNC plasma cutting machine, with strict control over the geometric dimensions of the cylinder sections.
Section 3: Both longitudinal and circumferential seams are welded using submerged arc welding, resulting in good appearance and formation, with the inner lining also being processed.100%XRay inspection.
Vacuum Degree:
One, the inner and outer surfaces of the stainless steel liner are degreased and pickled, the carbon steel shell is sandblasted and rust-removed on both inner and outer surfaces, ensuring paint adhesion, extending the paint's corrosion resistance lifespan, enhancing the stainless steel plate's corrosion resistance, reducing the air release from the sandwich, thereby guaranteeing the vacuum degree's longevity.
Two, prior to sand filling, perform a unique dehydration pretreatment on pearl sand, and heat the sandwich layer by nitrogen gas displacement treatment, significantly reducing the gas emission source.
Three, the process of negative pressure filling and positive pressure compaction for sand ensures the uniformity of the sandwiched pearlescent sand. The use of vibration rod compaction technology maximizes the filling amount of the pearlescent sand, guaranteeing the insulating effect of the sandwich layer.
Four: Utilizing a unique vacuum extraction process, significantly reduces the vacuuming time of the inner tank and the sandwich layer, ensuring the vacuum level of the sandwich is superior to the national standard requirements. Ensures the vacuum level of the storage tank is3～5No reprocessing required within the year.
Appearance:
One: The bending of the pipe is done on a CNC bending machine, ensuring strict dimensional accuracy. By not using elbow joints, it significantly reduces pipe resistance and enhances the aesthetics of the outer piping system.
The paint used is from the world-renowned Jotun brand, with two coats of primer and two coats of topcoat, ensuring the lifespan and aesthetic quality of the equipment.
