Introduction
The Vertical LNG Cryogenic Storage Tank is a fixed industrial vessel designed to store liquefied natural gas at extremely low temperatures, typically around -162°C.
Product Parameters
|
Parameter |
Specification |
|
Gross Capacity |
50 – 250 m³ |
|
MAWP (Max Allowable Working Pressure) |
0.8 / 1.2 / 1.6 MPa |
|
Height-to-Diameter Ratio |
Customizable per site layout |
|
Standard Outer Diameter |
≤ 3,500 mm (medium units) |
|
Minimum Order Quantity |
1 unit |
|
Annual Production Capacity |
Up to 120 tanks/year |
|
Shell Thickness Tolerance |
Zero negative deviation permitted |
|
Dry Weight & Center of Gravity (CoG) |
Laser-marked on nameplate |
Technical Performance
|
Parameter |
Specification / Range |
|
Boil-Off Rate (BOR) |
0.12% – 0.15% / day (for 100 m³ capacity) |
|
Insulation System |
High-vacuum multi-layer insulation (super-insulation) |
|
Thermal Bridge Control |
Automated precision tension-wrapped structure |
|
Vacuum Level (Factory Sealed) |
≤ 0.05 Pa |
|
Vacuum Measurement Method |
Calibrated digital Pirani gauge verification before shipment |
|
Vacuum Maintenance System |
External tamper-resistant vacuum evacuation port |
|
Getter System |
Palladium-based catalytic getter panels for hydrogen adsorption |
|
Thermal Operating Range |
Stable performance up to 45°C ambient temperature |
|
Vacuum Retention Warranty |
5-year structural vacuum guarantee |
Industrial Applications
Industrial Energy Supply: Direct pipeline integration for heavy industry (paper mills, glass foundries) replacing coal or heavy fuel oil infrastructure.
Peak-Shaving Support: Rapid-injection high-pressure storage for municipal utilities and grid peak-shaving stations during emergency supply deficits.
Marine Bunkering: Shore-to-ship and terminal storage fully compliant with IGC/IGF codes and international port authority safety mandates.
Off-Grid Energy: Remote fuel storage engineered for commercial mining fleets and isolated power generation grids operating in arctic conditions down to -40°C.
Quality Control
Weld Non-Destructive Testing (NDT): 100% Radiographic Testing (RT) on all inner vessel longitudinal and circumferential butt welds, executed by ASNT Level II/III certified technicians.
Vacuum Integrity: Helium mass spectrometer leak testing on the fully assembled inner vessel, ensuring a verified leak rate of< 1 × 10⁻⁹ Pa·m³/s to guarantee long-term vacuum retention.
Pressure & Thermal Verification: Pneumatic proof testing at 1.15× design pressure, hydrostatic testing, and mandatory Post-Weld Heat Treatment (PWHT) for all heavy-walled pressure boundary components.
Material & Insulation: Dual-layer containment utilizing SA-240 Type 304/304L stainless steel (inner) with 100% EN 10204 Type 3.1 MTR heat-number traceability, and Q345R or SA-516 Grade 70 carbon steel (outer jacket) finished with a 300-micron marine-grade epoxy coat for C5-M coastal environments, supported by low-conductivity FRP rods.
Welding Qualifications: All pressure boundary welding procedures and operators are qualified strictly to ASME Section IX and EN ISO 15614-1 standards.
Engineering Delivery Services
Turnkey Logistics: Execution of heavy-haul permitting, multi-axle transport route clearance, and specialized port/site crane rigging coordination.
EPC Design Integration: Provisioning of certified civil foundation reaction loads, anchor bolt layouts, and localized wind/seismic shear calculation packets.
Site Commissioning: On-site vacuum field verification, system nitrogen purging, and controlled cryogenic cool-down monitoring by field engineers.
O&M Documentation: Complete English-language Operations & Maintenance manuals, including localized statutory compliance and annual safety inspection checklists.
Compliance & Certifications
ASME Certification
Full compliance with ASME Section VIII Division 1 and Division 2, code-stamped with official "U" and "U2" designators and registered with the National Board (NBBI).
European Compliance
CE marking under the European Pressure Equipment Directive (PED 2014/68/EU) utilizing AD2000 and EN 13458 design and construction standards.
Authorized Audits
Annual manufacturing facility and process verification maintained under active Lloyd's Register, TÜV SÜD, or SGS surveillance.
FAQ
Q: What is the expected service life of this LNG storage tank under continuous industrial operation?
A: The design service life is 20–25 years under standard LNG station duty cycles. Major pressure-bearing components are fatigue-designed with scheduled inspection intervals every 5 years.
Q: How long does it take from order confirmation to on-site commissioning?
A: Typical lead time is 10–14 weeks for manufacturing, followed by 2–3 weeks for transportation, installation, and commissioning. For urgent projects, production priority scheduling can shorten fabrication by approximately 10–15%.
Q: What is the actual field-proven thermal stability over time?
A: In typical LNG station environments, boil-off performance remains within design range for the first 5–7 years. After this period, performance is mainly influenced by maintenance conditions rather than structural degradation.
Q: What happens if vacuum performance gradually decreases after long-term use?
A: The system includes a monitored vacuum maintenance interface that allows controlled re-evacuation if performance deviation is detected. In most cases, corrective maintenance restores thermal efficiency without requiring structural replacement.
Q: Are there real-world projects where this tank has been successfully deployed?
A: Yes, the system has been deployed in industrial LNG stations and off-grid energy supply projects in both coastal and inland regions. Typical applications include peak-shaving stations and remote industrial fuel supply systems.
Q: Can the tank operate reliably in extreme climate conditions?
A: Yes, the system is designed for ambient temperatures up to 45°C and cold-region operation down to -40°C.
Q: What are the main operational risks and how are they controlled?
A: The primary risks are vacuum degradation and valve system leakage. These are mitigated through continuous pressure monitoring, redundant sealing design, and scheduled inspection protocols.
Q: What is the total cost of ownership (TCO) over a 10-year operation period?
A: Most operating cost comes from periodic inspection, valve maintenance, and instrumentation calibration. Compared with above-ground pressurized storage, the system reduces energy loss costs due to low boil-off design.
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