Natural gas tanks, also known as low-temperature tanks, are vertical or horizontal double-layer vacuum-insulated storage tanks. The inner shell is made of austenitic stainless steel, while the outer shell material varies by user location, following national regulations to use 345R. The annular space between the inner and outer shells is filled with insulating material, pearl sand, and then evacuated. The product undergoes on-site inspection by the National Technical Supervision Administration and is issued with a pressure vessel supervision and inspection certificate.
Natural gas storage tanks are the main equipment of LNG gasification stations, directly affecting the normal production of the stations and occupying a significant portion of the construction cost. They can be categorized into underground tanks, above-ground metal tanks, and metal prestressed concrete tanks. For LNG tanks, there are currently vacuum powder insulation tanks, positive pressure stacked insulation tanks, and high vacuum layer insulation tanks. Medium and small-sized gasification stations generally opt for vacuum powder insulation type low-temperature tanks. The tanks are divided into inner and outer layers, with the gap filled with mica sand and vacuumed to reduce the transmission of external heat, ensuring that the daily gasification rate of LNG within the tank is less than 0.3%.
Natural Gas Storage Tank
The operating pressure of the natural gas storage tank is 0.6-1.44 MPa, with an operating temperature of -162°C. (Available in vertical or horizontal configurations) The tank is constructed with two layers for the shell. To minimize heat transfer from the outside to the inside, a vacuum insulation structure with diatomaceous earth as the insulating material is used between the layers, isolating it from the atmosphere. This prevents the impact of atmospheric pressure or temperature changes and the entry of humid air into the insulation layer between the inner and outer shells, effectively ensuring and enhancing the performance of the insulation material.
Natural gas storage tanks have stringent safety requirements. As they store low-temperature liquids, any accident could lead to a large-scale evaporation of the refrigerated liquid, with the vaporization amount reaching about 300 times the original refrigerated state, forming explosive gas clouds in the atmosphere. Therefore, standards such as API and BS require double-walled tank structures and the application of containment concepts. In the event of a leak in the primary tank, the secondary tank can completely contain the leaked liquid and evaporated gas, ensuring storage safety.
Heze Boiler FactoryLimited Company
60CubicLNGStorage Tank Technical Parameters:
Container Type: IICategory Structure Type: Horizontal Insulation Method: Vacuum Powder Insulation (Pearlescent Sand)
Please provide the Chinese content that needs to be translated into American English. Quality: LNG(Liquefied Natural Gas (LNG) Maximum Allowable Working Pressure:0.86Mpa
Design Temperature: Inner Shell:-196℃ Outer Shell:-20-50℃
Work pressure:0.8Mpa Outer Shell:-0.1 MPa Design Pressure:0.84Mpa Outer Shell:-0.1 MPa
Available Accumulation:60m3 Effective Volume:54m3 Material: Inner Liner:S30408 Outer Case:Q345R
Spec: Inner Liner:?2400×12400×7/8 Outer Shell:?2900×13140×8/10 Total Length:14929mm
Total Weight:21760kg Insulation Spacing:250mm Inner tube material:S30408 Dimensions?2916×14929mm
Insulation Sandwich MaterialTCHP-50Matte pearl sand Fill Volume: >30.8m3
Internal Cylinder Pressure Test: Medium: Nitrogen Test Pressure:1.06Mpa
Valves; Low-temperature stainless steel gate valves Sealing vacuum degree: ≤5Pa Static Evaporation Rate ≤0.316%/d
Vacuum Insulation Layer Air Leak Rate ≤2×10-6 Pa.m3/s Vacuum Insulated Double Skin Leakage Rate ≤6×10-5 Pa.m3/s
Manufacturing Acceptance Standards:
GB/T18442.1~18442.6-2011, TSG21~2016"Regulation for Solid Container"NB/T47042-2014
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