How much do you know about the basics of stainless steel LNG storage tanks?

Stainless steel LNG tanks are made of tempered material, boasting strong resistance to acidity and alkalinity, and are designed to meet public satisfaction by considering the impact of external environments on the tanks. They are highly popular in daily life and social settings. These tanks are primarily composed of natural gas pretreatment processes, liquefaction processes, storage processes, control systems, and fire protection systems, avoiding the drawbacks of outdated tanks, and are a new, satisfactory product.

Stainless steel LNG tanks are primarily containers for storing liquefied natural gas, mainly used in residential kitchens, automotive fuel, and chemical plants. These tanks come in various sizes for convenience, allowing you to choose based on your specific needs. Generally, tanks ranging from 5 to 50 cubic meters are suitable for residential use or gas stations. Tanks from 50 to 100 cubic meters are commonly used for satellite liquefaction units and large-scale industrial applications. These LNG tanks feature different characteristics to accommodate installations in various regions, greatly enhancing our daily lives.

Insulation method for the protective structure of the lng tank

1. The true vacuum powder insulation method for LNG storage tanks involves evacuating the annular space between the inner and outer walls, filling it with powder (talcum powder), and is commonly used in small LNG storage tanks. Vacuum powder insulated tanks are favored due to their production technology being similar to that of liquid nitrogen and liquid oxygen tanks, making the manufacturing technology of domestic producers quite mature. Since the operation and maintenance of LNG tanks are relatively convenient and flexible, their use is widespread. Most domestic LNG liquefaction stations use 50m3 and 100m3 cylindrical double-metal vacuum powder LNG storage tanks. Currently, tanks up to 200m3 can be produced, but due to their larger size, transportation is challenging, and they are generally less commonly used. Vacuum powder insulated tanks are also available in spherical designs, but their application range is typically 200-1500m3, and the on-site installation of spherical tanks is difficult.

2. Positive Pressure Insulation Accumulation

Insulated with thermal materials, the sandwiched layer is supplied with nitrogen gas; the insulation layer is typically thick, and widely used in large and medium-sized LNG storage tanks and containers. Usually in vertical LNG mother-daughter storage tanks.

3. High vacuum multilayer insulation.

Utilizing high vacuum multi-layer wrapped insulation, commonly used in tank cars. The cylindrical double-metal vacuum powder LNG storage tanks, commonly used in domestic LNG liquefaction stations. Considering that vertical tanks save space and have a larger static head of LNG, which is beneficial for the self-increaser's operation, vertical double-metal vacuum powder LNG storage tanks are adopted. The site's LNG storage capacity is not large, but the insulation performance requirements are high, thus opting for high vacuum multi-layer wrapped insulation tanks. Based on the LNG storage capacity and considering the ease of transporting skid-mounted equipment, a horizontal storage tank of 50 m³ is selected for the LNG transfer unit. Each LNG storage tank is equipped with a level gauge, differential pressure transmitter, pressure transmitter, temperature transmitter, and pressure gauge to provide on-site indication and remote control of the LNG level, temperature, and pressure within the tank. The tank top features a safety explosion-proof device, and the bottom is equipped with an interlayer extraction port and a temperature testing port. Based on the system's working pressure and considering economic factors, the design pressure of the inner tank is set at 1.2 MPa, and the design pressure of the outer tank is -0.1 MPa.

Cautionary Notes for LNG Tanks

1. Safe Operation of LNG Tanks: mm_+0 To prevent over-temperature and over-pressure phenomena in LNG tanks, the usage pressure and temperature should be controlled. The causes of over-temperature and over-pressure in LNG tanks include the following:

(1) Operational Errors To prevent operational errors, warning signs should be hung on critical operation devices. Clearly marked or written on the signs are the opening and closing directions of valves, their open and closed states, precautions, and more.

(2) Overfilling of Liquefied Gases Preventive measures against overfilling include: strictly filling according to the specified storage volume; upon discovering an overfill, immediately attempt to remove the excess; all instruments used for filling must be regularly inspected; level gauges should be periodically flushed; if there is any remaining liquid inside the container, it should be included in the filling volume; the weight cannot be ignored; and when the surrounding temperature rises, spraying for cooling should be carried out.

2. Maintenance and care for LNG tanks:

1. Cylinders must be stored in well-ventilated areas and kept at least 1.5 meters away from any fire or heat sources. Do not use fire to heat, scald with boiling water, or expose to direct sunlight. Regularly inspect the cylinder valves and pipeline joints for leaks, ensuring no gas escapes. Typically, check for leaks using soap and water, and strictly prohibit using open flames for leak testing.

LNG储罐厂家 

Low-temperature Storage Tanks, Liquid Oxygen Storage Tanks, LNG Storage Tanks, Liquid Nitrogen Storage Tanks, Carbon Dioxide Storage Tanks, Low-Temperature Vessels, Liquid Oxygen Vessels, LNG Vessels, Pressure Vessels, LNG Fueling Station Equipment

Product Features: Reasonably designed, high safety performance, easy to operate and maintain. The design phase fully considers equipment safety and also aims to reduce manufacturing costs, saving users' funds.

Application Range: Suitable for industrial gas stations, LNG refueling stations, LNG gasification stations, centralized gas supply for gas boilers, and centralized gas supply equipment for enterprises. Custom manufacturing available according to customer requirements.

Operation and Maintenance Procedures for LNG Tanks

I. LNG Unloading Procedure

Note: (Example: 1# LNG Storage Tank Liquid Inlet)

Check if the pressure gauges, level indicators, thermometers, flammable gas detectors, and safety valves at the LNG unloading platform and within the 1# LNG storage tank area are operating normally.

2. Check if valves C-8, G1-5, G1-11, G1-13, G1-15, B-1, and B-2 are in the open position, and if valves G1-8, C-1, C-2, C-3, C-4, C-5, C-6, and C-7 are closed. Inspect that the root valve bolts of the LNG storage tank are tight and the flange connections are intact. If loose, secure them immediately.

3. Prior to entering the station, the LNG tanker must raise the static electricity grounding wire. After entering, the speed of the LNG tanker must not exceed 5 kilometers per hour, and it must stop at the designated location, turn off the engine, remove the key, pull up the handbrake, close the doors securely, place the wooden chocks, and connect the static electricity grounding wire. Install the LNG tanker loading and unloading hoses: one: Connect the LNG tanker (Xinjiang Guanghui) self-pressurized liquid phase outlet to the liquid phase inlet of the gasifier; connect the LNG tanker self-pressurized gas phase inlet to the gas phase outlet of the gasifier; connect the LNG tanker liquid phase outlet to the LNG pipeline. Two: Connect the lower liquid inlet and outlet of the LNG tanker (XinAo Anruike) to the LNG pipeline, and connect the gas phase pipeline to the BOG pipeline.

4. The pressure of LNG tankers should be maintained between 0.55-0.7 MPa. When the pressure of the LNG tanker falls below 0.55 MPa, the LNG tanker's self-pressurization system or the unloading platform's gasifier should be activated to increase the pressure.

5. Open valve G1-8 to pre-cool the incoming liquid pipeline with LNG from the tank.

6. After pre-cooling is complete, open valve C-2 and the LNG tanker discharge valve. Fill the LNG storage tank with LNG by simultaneously filling from both the bottom and top. On-site, adjust the opening of valve C-2 based on the filling speed of Tank No. 1.

7. When the pressure difference between the LNG tank truck and the LNG storage tank is less than 0.1 MPa, open valve G1-14 to depressurize the LNG storage tank, or activate the LNG tank truck's self-pressurization system or the regasifier at the unloading platform to increase pressure on the LNG tank truck, maintaining a pressure difference of 0.2 MPa between the LNG tank truck and the storage tank is recommended. During the depressurization process of the LNG storage tank, the pressure after the regulator must be strictly controlled and should not exceed the regulator's cut-off pressure.

8. After confirming that the LNG in the LNG tank truck has been unloaded, close valve C-2 and open valve C-3 to reduce pressure. When the LNG tank truck is connected to the city...

30立方LNG储罐厂家、30立方天然气储罐优质供应商

For 30-cubic-meter LNG storage tanks with a volume of 500 cubic meters or less, the gas phase space of spherical low-temperature storage tanks and vertical flat-bottom cylindrical low-temperature storage tanks from the same manufacturer can accommodate nearly the same amount of BOG. With equal filling rates and evaporation rates, for each activation of the BOG compressor in the vertical flat-bottom cylindrical low-temperature storage tank, the spherical low-temperature storage tank's compressor needs to be activated 1.02, 1.05, or 1.06 times, respectively, with similar activation frequencies and comparable operational costs. When the volume is 10,000 cubic meters, for each activation of the BOG compressor in the vertical flat-bottom cylindrical low-temperature storage tank, the spherical low-temperature storage tank's compressor requires 2.42 activations, resulting in higher operational costs for the spherical low-temperature storage tank.

LNG Tank Features:

(1) LNG Tanks offer superior structural pressure-bearing, load-bearing, and thermal insulation compared to 30 cubic meter vertical flat-bottomed cylindrical low-temperature storage tanks.

(2) For volumes of 1500m3 and below, the material cost of low-temperature liquid oxygen storage tanks is comparable or better than that of vertical flat-bottomed cylindrical low-temperature storage tanks. For volumes above 1500m3, the material cost of vertical flat-bottomed cylindrical low-temperature storage tanks is superior to that of LNG storage tanks, with the advantage becoming more pronounced as the volume increases.

(3)建造难度方面低温液氧储罐略高于立式平底圆筒形低温储罐；建造周期二者相当30立方LNG储罐厂家。

(4) LNG tanks offer superior advantages in terms of foundation footprint, cost, and safety compared to vertical flat-bottomed cylindrical low-temperature storage tanks.

(5) For storage capacities of 5,000 m3 or less, the operating costs of spherical low-temperature storage tanks are comparable to those of vertical flat-bottomed cylindrical low-temperature storage tanks; for capacities of 10,000 m3 or more, the operating costs of vertical flat-bottomed cylindrical tanks are lower than those of low-temperature liquid oxygen storage tanks. Generally speaking, for medium and small low-temperature storage tanks, when selecting a type considering process requirements for pressurized storage, manufacturers of 30-cubic LPG tanks should opt for spherical low-temperature storage tanks. For capacities between 200 m3 and 1,500 m3 without pressurized storage, low-temperature liquid oxygen storage tanks can be chosen. For capacities greater than 1,500 m3, vertical flat-bottomed cylindrical low-temperature storage tanks offer better economic value.