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 sq. m    Ambient temperature    See drawing °C

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

Origin: Shandong Heze

30立方立式lng储罐 卧式LNG储罐 低温天然气储罐厂家

The low-temperature storage tank features a double-wall structure, with the inner vessel containing low-temperature liquids, withstanding the pressure and low temperatures of the medium. The material of the inner vessel is a low-temperature-resistant alloy steel (0Crl8Ni9). The outer shell acts as a protective layer for the inner vessel, maintaining a certain gap to form an insulating space, and supporting the weight of the inner vessel, the medium, and the vacuum negative pressure of the insulation layer. The outer shell does not come into contact with the low temperature and is made of container steel. The insulating layer is mostly filled with mica sand, and a high vacuum is pulled. The evaporation rate of the low-temperature storage tank is generally less than 0.2%.

LNG tanks are categorized by capacity

(1) Small (5-50 m³): Commonly used for civil LNG refueling stations and civil gas liquefaction stations. (2) Medium (50-100 m³): Often utilized for industrial gas liquefaction stations. (3) Large (100-1000 m³): Suitable for small-scale LNG production facilities.

(4) Large (10,000-40,000 m3): Used for base load and peak-shaving liquefaction units. (5) Extra-large (40,000-200,000 m3): Used for LNG receiving stations.

LNG tanks are categorized by shape

Spherical: Generally used for medium to small capacity tanks. (2) Cylindrical: Used in tanks of various capacities. LNG tanks are categorized by their placement: (1) Above-ground: Located on the ground. (2) Underground: Located beneath the ground.

Determination of Design Pressure and Calculated Pressure

Currently, the majority of 100m³ vertical LNG storage tanks have a maximum working pressure of 0.8MPa. According to the regulations of GB150 "Steel Pressure Vessels," when the maximum working pressure of the storage tank is 0.8MPa, the design pressure can be taken as 0.84MPa. The filling factor of the tank is 0.95, and the net pressure of the liquid column after filling the inner tank with LNG is 0.062MPa. The absolute pressure between the inner and outer tanks is 5Pa, resulting in a calculated pressure of 1.01MPa for the inner tank.

The primary function of the outer tank is to securely fix the inner tank and insulating material in a suspended or supported manner, while forming a high-vacuum insulating layer with the inner tank. The loads acting on the outer tank are mainly the gravitational loads of the inner tank and the medium, as well as the vacuum negative pressure of the insulating layer. Therefore, the outer tank is an external pressure vessel, with a design pressure of -0.1 MPa.

Material selection for LNG tanks

During normal operation, the working temperature of the LNG storage tank is -162.3°C. Before the first use, the tank must be pre-cooled using liquid nitrogen at -196°C, making the design temperature of the tank -196°C. The inner tank must withstand both the working pressure of the medium and the low temperature of LNG, requiring the material to have excellent comprehensive mechanical properties at low temperatures, particularly good low-temperature toughness. Therefore, the inner tank material is selected as SS30408. Based on the calculated pressure of the inner tank and the selected material, the calculated thickness and design thickness are 11.1mm and 12.0mm, respectively. As a normal temperature external pressure vessel, the outer tank material is chosen as low-alloy container steel 16MnR, with a design thickness of 10.0mm.

LNG Tank接管Design

Manholes on the inner tank include: inlet liquid ports, outlet liquid ports, liquid discharge ports, vapor ports, level checking ports, upper level gauge ports, lower level gauge ports, and 8 process manholes. The material of the pipe connections on the inner tank is all OCrl8Ni9.

For easy regular measurement of vacuum and evacuation, a vacuum evacuation port is provided on the bottom sealing cap of the outer shell (the port is sealed after evacuation). To prevent vacuum failure and the leakage of the inner tank medium into the outer shell, a pressure relief device is set on the sealing cap of the outer shell.

30-cubic-meter Vertical LNG Storage Tanks, Horizontal LNG Storage Tanks, Low-Temperature Natural Gas Storage Tanks Manufacturer

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 sq. m Environmental Temperature - See drawing °C

Wall Thickness: 8mm; Outer Dimensions: φ2916*14929mm

Origin: Shandong Heze

60-cubic-meter LNG Storage Tank, Horizontal LNG Storage Tank, Manufacturer Specializing in 60-cubic-meter Liquefied Natural Gas Tanks

LNG tanks are atmospheric pressure, low-temperature, large storage vessels, typically with a flat bottom and double-walled cylindrical design. The inner cylinder is usually made of 9% nickel alloy steel, but can also be all aluminum, stainless steel foil, or pre-stressed concrete. The outer wall is made of carbon steel or pre-stressed concrete. The suspended thermal support platform at the top of the wall is aluminum, while the tank roof is constructed from carbon steel or concrete. The main thermal insulation materials inside the LNG tank include expanded perlite, elastic glass fiber felt, and foam glass bricks.

LNG Storage Tank Specifications

Low-temperature resistance

The boiling point of liquefied natural gas at atmospheric pressure is -162°C. Therefore, LNG tanks require excellent low-temperature resistance and insulation properties.

(2) High safety requirements

Due to the storage of low-temperature liquids inside the tank, in the event of an accident, the refrigerated liquid would volatilize in large quantities, with the vaporization amount being approximately 625 times that of the refrigerated state, forming an explosive mixture in the atmosphere. Therefore, it is required that the tank be constructed with a double-walled structure and utilize the sealing concept. In the event of a leak in the first layer of the tank, the second layer can completely seal off the leaking liquid and the evaporating gas, ensuring storage safety.

(3) Special material.

The inner container must be capable of withstanding low temperatures and is made of Austenitic stainless steel, while the outer cylinder is constructed from Q345R mild low-carbon alloy steel plate.

(4) Strict thermal insulation measures.

Due to the maximum temperature difference of up to 200℃ between inside and outside the can, the can must have excellent insulation properties to maintain an internal temperature of -160℃. High-performance insulation material should be filled between the inner and outer shells. The insulation material at the bottom of the can must also possess sufficient pressure-bearing capabilities. (5) Good seismic performance

The seismic requirements for general buildings are to crack but not collapse under specified seismic loads. To ensure the safety of storage tanks under unexpected loads, they must possess excellent seismic performance. The tank must remain undamaged under the given seismic intensity. (6) Strict construction requirements

The tank welds must undergo 100% magnetic particle inspection (MT) and 100% vacuum leak tightness test (VBT). Strict selection of insulation materials is required, and the prescribed procedures must be followed during construction.

Huzhou Boiler Factory Co., Ltd. is a key enterprise designated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China for the production of boiler pressure vessels. It is an associate member of the China Industrial Boiler Association and a member of the China Association of Heating, Ventilation and Air Conditioning. The company holds B-grade boiler manufacturing qualifications (Cert No. TS2110587-2011), third-class pressure vessel manufacturing qualifications (Cert No. TS2210916-2013), and design qualifications (Cert No. TS1237085-2011), and has passed the ISO9001 international quality management system certification.

Huzhou Boiler Factory Co., Ltd. Main Products:

Chemical Storage Tanks (liquefied gas tanks, liquefied petroleum gas tanks, liquid ammonia tanks, propane tanks, propylene tanks, isobutane tanks, chloromethane tanks, etc.); Non-standard Pressure Vessels (towers, heat exchangers, autoclaves, reaction vessels, stainless steel containers, etc.)

Cooling auxiliary equipment (evaporative coolers, ammonia storage vessels, drain tanks, circulating tanks, oil separators, separators, condensers, intermediate coolers, siphon tanks, economizers, etc.)

Boiler equipment (including steam boilers, hot water boilers, thermal oil boilers, oil-gas boilers, waste heat boilers, etc.).

Low-temperature Storage Tanks (Liquid Oxygen Tanks, Liquid Oxygen Vessels, Liquid Nitrogen Tanks, Liquid Nitrogen Vessels, Liquid Argon Tanks, Carbon Dioxide Tanks, LNG Tanks, Liquefied Natural Gas Tanks)

60-cubic-meter LNG Storage Tank, Horizontal LNG Storage Tank, Professional Manufacturer of Liquefied Natural Gas Storage Tanks