Product Description

Brand Huoguo Group Model CFW-60/0.8

Material: Stainless Steel, Diameter: 2916mm

Application Range    -162℃    Volume    60000L

Heat Exchange Area    See drawing m²    Ambient Temperature    See drawing °C

Wall Thickness: 8mm, External Dimensions: φ2916*14929mm

Origin: Shandong Heze

60 Cubic Meters Horizontal LNG Storage Tank, Natural Gas Low-Temperature Storage Tank, Vacuum LNG Storage Tank, Competitive Price

The Functions of Different Parts of LNG Tanks

Outer Canister: Protects the inner canister and the insulating material between the inner and outer canisters, forming a vacuum between them to enhance the insulating properties of the material. The outer canister can completely seal off any leaking liquid and evaporated gas, ensuring storage safety.

Inner罐: Primarily for storing LNG, due to the ultra-low temperature properties of LNG, strict requirements are placed on the material and manufacturing of the tank. Liquid intake pipes (top and bottom): Pay attention to the length of the upper intake pipe, which is approximately the same as the inner tank. The intake pipes in the storage tank use a combination nozzle and porous pipes to ensure that newly added LNG is thoroughly mixed with the existing LNG. LNG is transported to the refueling station from the LNG liquefaction plant via road tankers or tank container trucks. During unloading, to prevent an increase in pressure within the LNG storage tank from affecting unloading speed, the upper intake method is used when the LNG temperature in the tanker is lower than that in the storage tank. The low-temperature LNG in the tanker is sprayed into the storage tank through the upper intake pipe nozzle in a spray form, cooling some of the gas to a liquid state and reducing the tank pressure, allowing for smooth unloading. If the LNG temperature in the tanker is higher than that in the storage tank, the lower intake method is employed; the high-temperature LNG enters the tank from the lower intake port, mixing with the cooler LNG inside to lower the temperature and avoid evaporation of the high-temperature LNG through the upper intake port, which could increase the tank pressure and complicate unloading. In practice, due to the distance from the LNG gas source to the consuming cities, the LNG temperature inside the tanker is typically higher than that in the storage tank at the gasification station upon arrival, necessitating the use of the lower intake method. Therefore, except for the first time of filling LNG, the lower intake method is generally used for normal unloading operations.

Safety Valve: When the pressure inside the storage tank exceeds the set pressure of the safety valve (also known as the working pressure), the safety valve will automatically open, releasing excess gas to stabilize the pressure. The set pressure of the safety valve is generally 1.04-1.1 times the operating pressure of the pressure vessel, and the seat pressure is 0.8 times the operating pressure of the vessel.

Safety Valve Terminology: The nominal pressure of a safety valve indicates the maximum allowable pressure under normal temperature conditions. For safety valves used in high-temperature equipment, the reduction in allowable stress of the material under high temperature should not be considered. Safety valves are designed and manufactured according to the nominal pressure standard.

Setpoint Pressure: Also known as the adjustment pressure, it is the pressure of the medium when the safety valve disc starts to lift under operating conditions. Discharge Pressure: The pressure on the inlet side when the valve disc reaches the specified opening height.

Seat Pressure: The inlet pressure when the valve seat is re-tightened after the safety valve discharge, and the medium stops flowing out. Seat pressure is an important parameter indicating the quality of the safety valve usage, generally requiring it to be at least 80% of the working pressure, with the upper limit set to prevent frequent valve disc oscillation.

Opening and Closing Pressure Difference: The difference between the opening pressure and the return seat pressure.

Outer Shell Burst Disc: Designed to prevent leakage at the junction of the inner tank and pipeline, and to avoid the outer shell explosion caused by increased pressure between the layers. The burst disc is installed to relieve pressure in time, thereby protecting the storage tank.

Differential Pressure Level Gauges: The differential pressure level gauge is commonly used in LNG storage tanks.

Hekou 60 Cubic Horizontal LNG Storage Tank, Natural Gas Low-Temperature Storage Tank, Vacuum LNG Storage Tank - Competitive Pricing

7 Liquefied Natural Gas Storage Tank

7.1 General Provisions

7.1.1 Selection of Liquefied Natural Gas Storage Tanks Shall Comply with the Following Regulations:

Conduct risk assessment for the tank design of liquefied natural gas storage, determining the impact on surrounding environment, personnel, and property safety.

2. Select the tank type shown in Appendix B of this specification for liquefied natural gas storage tanks.

In densely populated industrial areas or those with numerous facilities, it is advisable to choose double-walled tanks, full containment tanks, or film-lined tanks.

Under conditions where the required safe spacing is met, a single-container option may be selected.

7.1.2 The design of the liquefied natural gas storage tank shall comply with the following regulations:

During and after the OBE period, the tank system should continue to operate.

During and after the SSE, the storage capacity of the tank should remain unchanged and be capable of isolation and maintenance.

The liquefied natural gas (LNG) storage tanks should undergo seismic calculations under OBE and SSE conditions, ensuring the safety of shutdown under SSE conditions; the prestressed concrete outer shell of the full-volume tanks should be subjected to ultimate bearing capacity calculations under ALE conditions.

7.1.3 The pipe openings of the liquefied natural gas storage tank should be located at the top of the tank.

7.1.4 The response spectra of OBE, SSE, and ALE shall be determined in accordance with the following requirements:

The OBE should represent ground motion with a 10% exceedance probability within 50 years (return period of 475 years) and a damping ratio of 5%, and its response spectrum should not be less than the value corresponding to the seismic fortification earthquake for the region as specified by the current national standard "Code for Seismic Design of Buildings" GB 50011.

SSE should represent seismic ground motion with a 2% probability of exceedance within 50 years (return period of 2475 years) and a damping ratio of 5%, and its response spectrum should not be less than the value corresponding to the rare earthquake as specified in the current national standard for seismic design of buildings, GB 50011, for the region in question.

The acceleration value of the 3 ALE spectrum should be half of the SSE spectrum acceleration value.

4. When the vertical earthquake response spectrum is unavailable, the vertical earthquake influence coefficient should not be less than 65% of the maximum value of the corresponding horizontal earthquake influence coefficient.

7.1.5 The auxiliary structures of the liquefied natural gas storage tank should be designed in accordance with OBE.

7.1.6 During seismic action, the damping ratios for each design component of the liquefied natural gas storage tank should be selected according to the specifications in Table 7.1.6.

Table 7.1.6: Anibin of Various Design Components

7.1.7 The permanent loads and variable loads of the liquefied natural gas storage tank shall comply with the specifications in Table 7.1.7.

Table 7.1.7: Permanent and Variable Loads of Liquefied Natural Gas Storage Tanks

Note: 1 a), b) Refer to Appendix B of this specification. "√" indicates consideration, while "—" indicates non-consideration.

2 “√*” indicates that it only applies to the steel tank top of the normal temperature steel outer tank for low-temperature steel outer tanks.

7.1.8 The seismic and accidental loads for liquefied natural gas storage tanks shall comply with the specifications in Table 7.1.8.

Table 7.1.8 Earthquake and Accidental Loads on Liquefied Natural Gas Storage Tanks

    Note: a), b) Refer to Appendix B of this specification. "√" indicates consideration, while "—" indicates non-consideration.

7.1.9 The site of the liquefied natural gas receiving station should undergo seismic and geological disaster assessments.