Product Description

Brand  He Guo Group  Model  CFW-60/0.8

Material: Stainless Steel, Diameter: 2916mm

Application Range: -162℃; Volume: 60,000L

Heat exchange area - See drawing sq. m; Ambient temperature - See drawing °C

Wall Thickness: 8mm, Outer 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 an LNG Tank

Outer Canister: Protects the inner canister and the insulation material between the inner and outer canisters, forming a vacuum between them to enhance the insulation performance of the material. The outer canister completely seals off any leakage of liquid and vapor, ensuring storage safety.

Inner Tank: Primarily used for storing LNG, but due to the extremely low-temperature characteristics of LNG, the materials and manufacturing requirements for the tank are very strict. Inlet and outlet pipes: Pay attention to the length of the upward inlet pipe, which is nearly the same as the inner tank. The inlet pipes in the storage tank use a combination nozzle and porous tube, allowing newly injected LNG to mix thoroughly with the existing LNG. LNG is transported to the gas 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 upward feeding 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 upward feeding pipe nozzle in a spray form, cooling some of the gas to a liquid state and reducing the tank pressure, facilitating smooth unloading. If the LNG temperature in the tanker is higher than that in the storage tank, the downward feeding method is employed. The high-temperature LNG enters the storage tank through the downward feeding inlet, mixing with the low-temperature LNG inside to cool down and prevent the high-temperature LNG from evaporating through the upward feeding inlet, which could increase the tank pressure and make unloading difficult. In actual operations, since the LNG gas source is usually farther from the cities consuming the gas, when transported over long distances to consuming cities, the LNG temperature in the tanker is typically higher than that in the storage tank at the gasification station, necessitating the use of the downward feeding method. Therefore, except for the first time of LNG filling, the downward feeding method is generally used during normal unloading procedures.

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 to release excess gas and stabilize the pressure. The set pressure of the safety valve is generally 1.04-1.1 times the operating pressure of the pressure vessel, while the reset 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 nominal pressure standards.

Setpoint Pressure: Also known as the adjusting 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-seated after the safety valve discharge, and the medium stops flowing. Seat pressure is an important parameter indicating the quality of the safety valve's use, generally requiring it to be at least 80% of the working pressure, with the upper limit set to prevent frequent valve disc oscillation.

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

External Shell Bursting Disc: Designed to prevent leakage at the connection root between the inner tank and the pipeline, which could lead to increased pressure in the sandwich layer and potentially cause the external shell to explode. The bursting disc is installed to relieve pressure promptly, thereby protecting the storage tank.

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

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

Product Description

Brand  He Guo Group  Model  CFW-30/0.8

Material: Stainless Steel, Diameter: 2916mm

Application Range    -162℃    Volume    30000L

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

Wall Thickness: 8/10mm, Dimensions: 2916*8289mm

Origin: Shandong Heze

30立方LNG储罐 60立方天然气储罐 100立方液化天然气储罐厂家

The operational pressure of the low-temperature LNG storage tank is 0.6-1.44 MPa, with an operational temperature of -162°C. (Available in vertical or horizontal designs) The LNG storage tank is composed of two layers—inner and outer. To minimize external heat transfer to the tank, a vacuum-insulation panel made of diatomite is used between the layers to isolate it from the atmosphere. This prevents the influence of atmospheric pressure or temperature changes and the entry of humid air into the insulation layer between the inner and outer tanks, effectively ensuring and enhancing the performance of the insulation material.

Regulations and standards for fixed pressure vessels safety

1. GB/T 18442-2011 "Fixed Type Vacuum Insulated Low-Temperature Pressure Vessel"

2. GB50028—2006 "Urban Gas Pipeline Design Code"

(Note: Applicable to the design of new, expanded, or reconstructed urban gas pipelines for various users, including residential, commercial, industrial production, heating, ventilation, and air conditioning, etc., in cities, towns, or residential areas.)

3. GB50494—2009 "Town Gas Technology Specification"

(Note: Applicable to the construction, operation, maintenance, and use of urban gas facilities.)

4. GB50156—2012 Design and Construction Code for Gasoline and Gasoline Filling Stations

(Note: Applies to the design and construction of new, expanded, and reconstructed automobile gas stations, CNG stations, and combined fueling and CNG stations.)

5. JB/T6869-1997  "Safety Rules for the Use of Low-Temperature Liquid Storage and Transportation Equipment"

(Note: Applicable to low-temperature storage and transportation equipment for liquid oxygen, nitrogen, argon, and carbon dioxide in low-temperature liquid containers and tank trucks.)

Low-temperature LNG storage tanks are equipped with multiple valves and pipeline sections, including: top inlet valve, bottom inlet valve, liquid discharge, overflow valve, vent valve, vacuum gauge valve, exhaust valve, main inlet valve, gas usage valve, three-way switch valve, inner cylinder safety valve, liquid level display gas phase valve, also for equalizing valve, vacuum gauge, outer cylinder explosion-proof device, pressure gauge, liquid level gauge, pipeline safety valve, remote transmission interface, and other valves. The material of the valves is very important; improper material can cause external or internal leakage of the shell and sealing surfaces; the comprehensive mechanical properties, strength, and rigidity of the components do not meet the usage requirements and may even fracture. Therefore, the material is the primary and key issue in the selection process of low-temperature storage tank valves. The company has strict requirements for the selection of product valves and pipelines, ensuring customer safety and peace of mind through strict quality and performance screening by professionals.

30立方LNG储罐 60立方天然气储罐 100立方液化天然气储罐厂家