Natural gas tanks, also known as low-temperature tanks, are vertical or horizontal double-layer vacuum insulated tanks. The inner shell is made of austenitic stainless steel, while the outer shell material varies by user location, generally selected as 345R according to national regulations. The space between the inner and outer shells is filled with insulating material, Pearlite sand, and vacuumed. The product undergoes on-site inspection by the National Technical Supervision Bureau and is issued a pressure vessel supervision and inspection certificate.
Natural gas tanks are the main equipment in LNG gasification stations, directly affecting their normal production and comprising a significant portion of the construction cost. They can be categorized into underground tanks, above-ground metal tanks, and pre-stressed concrete metal tanks. For LNG tanks, there are currently vacuum powder insulation tanks, positive pressure accumulation insulation tanks, and high vacuum layer insulation tanks. Medium and small-scale gasification stations typically opt for vacuum powder insulation low-temperature tanks. The tanks consist of an inner and outer layer, with the space in between filled with mica sand and evacuated to reduce the transfer of external heat, ensuring that the daily gasification rate of LNG inside the tank is less than 0.3%.
Natural Gas Storage Tank
The operation pressure of the natural gas storage tank is 0.6-1.44 MPa, with an operation temperature of -162°C. (Available in vertical or horizontal configurations) The tank is constructed with two layers for its body. To minimize heat transfer from the outside to the inside, a vacuum-insulation structure filled with diatomaceous earth is used between the layers, isolating it from the atmosphere. This prevents the impact of atmospheric pressure or temperature changes and the entry of moist air into the insulation layer between the inner and outer tanks, effectively ensuring and enhancing the performance of the insulation material.
Natural gas storage tanks have high safety requirements. As the stored is a low-temperature liquid, in the event of an accident, the refrigerated liquid will evaporate in large quantities, with the vaporization rate approximately 300 times greater than its refrigerated state, forming an explosive gas mixture in the atmosphere. Therefore, specifications like API and BS require storage tanks to have a double-walled structure and implement sealing concepts. In the event of a leakage in the first layer, the second layer can completely seal the leaked liquid and evaporated gas, ensuring the safety of the stored material.
LNG Storage Vessel
LNG stands for Liquefied Natural Gas. Its primary component is methane. LNG is colorless, odorless, non-toxic, and non-corrosive. Its volume is approximately 1/600th that of an equivalent volume of gaseous natural gas, and its weight is about 45% of the weight of an equivalent volume of water. The calorific value is around 52 MMBtu per ton (1 MMBtu = 2.52×10^8 calories).
Model:
CFL-5/0.8，CFL-10/0.8，CFL-15/0.8，CFL-20/0.8，CFL-30/0.8，CFL-50/0.8，CFL-60/0.8，CFL-100/0.8，CFL-150/0.8...
CFW-5/0.8，CFW-10/0.8，CFW-15/0.8，CFW-20/0.8，CFW-30/0.8，CFW-50/0.8，CFW-60/0.8，CFW-100/0.8，CFW-120/0.8，CFW-150/0.8…
Low-temperature storage tanks are designed and manufactured in strict accordance with national standards, widely used for the storage and use of cryogenic liquids such as liquid oxygen, liquid nitrogen, liquid argon, liquid carbon dioxide, liquid natural gas, and liquid ethylene. They come in various working pressures and specifications. Featuring unique high-vacuum insulation technology, they offer excellent insulation properties, long-term vacuum retention, and extremely low operating costs. The modular pipeline system and high-configured components enhance the equipment's performance and durability while reducing maintenance costs, significantly boosting your competitive edge.
Introduction:
Low-temperature thermal insulation tanks are of the vacuum powder insulation type, consisting of a double-container structure with an inner container and an outer container, which can be divided into vertical and horizontal types. The inner container, selected based on the medium it contains, is made of Austenitic stainless steel, specifically S30408. The outer container material is selected as Q345R depending on the user's location, with the space between the inner and outer containers filled with insulating material, Pearlite sand, and then evacuated.
Usage:
Liquid Oxygen (LO2), Liquid Nitrogen (LN2), Liquid Argon (LAr), Liquefied Natural Gas (LNG), Liquid Carbon Dioxide (LCO2)
Insulation Performance:
Insulation materials are filled with pearlescent sand under heat conditions and then vacuumed. The standard vacuum degree after the sandwich is sealed is:
Sealing Vacuum Gauge
Design Parameters:
Design Pressure: 0.84 Mpa, 1.32 Mpa, 1.68 Mpa
Operating Pressure: 0.8 MPa, 1.2 MPa, 1.6 MPa
Design Temperature: -196℃
Operating Temperature: -196℃
Effective Volume: 2.5m³, 3.5m³, 5m³, 10m³, 15m³, 20m³, 30m³, 50m³, 60m³, 100m³
Definition:
LNG stands for Liquefied Natural Gas.
The primary component is methane. LNG is colorless, odorless, non-toxic, and non-corrosive, with a volume about 1/600th that of an equivalent volume of gaseous natural gas. Its weight is approximately 45% of the weight of an equivalent volume of water, and its calorific value is around 52MMBtu/t (1MMBtu = 2.52×10^8 cal).
Formed:
The natural gas produced from the gas field is first purified and then liquefied under ultra-low temperature (-162℃) and atmospheric pressure to form liquefied natural gas.
The critical temperature of LNG between gas and liquid phases at atmospheric pressure is -162℃.
The standard commonly used in LNG manufacturing is API 620.
Meaning:
Liquefied Natural Gas (LNG) storage tanks are specialized products designed for storing liquefied natural gas, and are classified as special equipment.TwoSimilar to pressure vessels, the 06Ni9DR material has undergone flaw detection, hydrostatic and pneumatic testing, on-site inspection by the Technical Supervision Bureau, and a pressure vessel inspection certificate has been issued. The external rust removal and painting processes have been completed. The liquefied gas storage tank has strict quality assessment for the material of the pressure-bearing components, appearance dimensions, weld quality, operational quality, installation quality, internal equipment, and safety accessories.
Routine physical and chemical tests of the drum material, such as mechanical properties and chemical composition.
The welding joints, welds, head of the tank, and the mutual geometric positions of all pressure elements are strictly inspected through X-ray non-destructive testing and magnetic particle inspection. Testing and examinations are conducted on the product's sealing, pressure resistance, and all technical indicators that may affect the safe operation of the product.
1. LNG Storage Tank System: The LNG storage system consists of a low-temperature storage tank, auxiliary pipelines, and control instruments.
2. By capacity classification:
Small natural gas storage tanks, 5-50 cubic meters, commonly used in residential gas liquefaction stations, LNG vehicle refueling stations, etc.
Medium-sized natural gas storage tank, 50-100 cubic meters, commonly used in satellite liquefaction units, industrial gas vaporization stations, etc.
3. Natural gas storage tanks, LNG pipelines typically use austenitic stainless steel pipes. Austenitic stainless steel pipes offer excellent low-temperature properties.
4. Vertical natural gas storage tanks (LNG tanks) featuring vacuum powder insulation technology. The inner tank and pipeline materials are made of OCr18Ni Austenitic stainless steel, while the outer tank is constructed from high-quality carbon steel Q345R steel plate for pressure vessels. Our company offers a variety of sizes ranging from 50 to 100 cubic meters in liquefied natural gas storage tanks.
5. Uses of Natural Gas Storage Tanks: Chemical fuel, residential fuel, automotive fuel, cogeneration, heat pumps, fuel cells, etc.
6. Natural Gas Storage Tank Liquefaction Process: Cascade Liquefaction Process, Mixed Refrigerant Liquefaction Process, Liquefaction Process with Expander.
7. The natural gas storage tank liquefaction unit consists of the natural gas pretreatment process, liquefaction process, storage system, control system, and fire protection system.
