Heze Boiler Factory Co., Ltd.

Liquefied Natural Gas (LNG) storage tanks are composed of the tank body, instruments, pipelines, valves, etc. These tanks feature two types of liquid inlet methods—upper and lower—allowing for selection based on actual conditions.

The inner tank of the Liquefied Natural Gas (LNG) storage tank is equipped with a safety system device featuring dual safety valves. Under normal operation, one set is in operation while the other is on standby. If the safety valve in operation trips, the manual pressure relief valve is immediately opened to depressurize below the tank's working pressure. Simultaneously, the safety device is swiftly switched to the standby system, effectively ensuring the tank's safety. This safety system device consists of safety valves, explosion-proof devices, vent valves, and three-way ball valves, not only reducing pipeline welding but also having excellent fire and static electricity prevention structures. Additionally, the safety relief openings on the outer shell are fully guaranteed to ensure the overall safety and reliability of the equipment. The low-temperature pipeline is centrally extracted for ease of operation and control, and the extraction outlet is designed with a Dural structure to accommodate low-temperature requirements and reduce stress on the pipeline due to thermal expansion and contraction, ensuring the tank's safety. The vacuum valve features triple "O" ring seals to effectively guarantee the reliability of the sandwich seal, and is made entirely of stainless steel with a compact size. The top of the LNG storage tank is designed with a suspended structure for ease of transportation, lifting, and installation. The unique design of the manhole ensures the cleanliness of the interior when the inner container is sealed. Vacuum isolation valves and combined vacuum gauges are used on the LNG storage tank for easy measurement of the vacuum degree in the sandwich and for maintenance, extending the tank's service life and improving its quality. The LNG storage tank is equipped with a level gauge and pressure gauge for local display of liquid level and pressure. The sandwich insulation material is high-quality domestic pearl sand, with the performance parameters of the pearl sand as follows:

Serial Number, Indicator Name, Unit, Indicator

Loose Bulk Density: 50-60 Kg/m³

2 Grain size mm 0.1-0.2 not less than 80%

Thermal Conductivity (atmospheric pressure, temperature 310-77k) W/m.k.s < 0.026

Moisture Content (Weight) % < 0.1

5 Unexpanded Rate % ≤1

6 Temperature ℃ -200℃ to 600℃

7 pH Value: 6.5～7.5

3. Inspection, Testing, and Acceptance

1. Inspect the inner cylinder material; use only upon passing inspection.

2. All welds are inspected in accordance with the GB150.1-150.4-2011 standards and drawings. Upon passing the inspection, Class A and B welds undergo 100% X-ray inspection, while Class C and D welds are subjected to 100% penetrant testing, with a corresponding inspection report issued.

3. After the cylinder assembly is completed, inspect the geometric dimensions, pipe end orientations, and shape deviations in accordance with the GB150.1-150.4-2011 standards and drawings.

4. After inspection passes, conduct a pressure test and issue a pressure test report. Once the pressure test is approved, proceed with vacuum pumping. After achieving the required vacuum level, conduct a helium leak test.

5. After the sandwich leak test passes, fill with pearl sand and then evacuate to a vacuum. Seal the vacuum once the vacuum level meets the requirements of GB/T18442-2011 standard.

IV. Technical Data

1. Upon contract signing, the seller shall provide the following technical documents to the buyer:

⑴ Each set of product quality certificates for the equipment (provided with the equipment)

Including: Certificate of Material for Main Pressure Components, Bill of Materials, Structural Dimensions Inspection Report, Inspection Plan, Product Certificate of Conformity, Pressure Vessel Product Data Sheet, Welding Records, Non-Destructive Testing Report, Pressure Testing Report, Supervision and Inspection Certificate for Special Equipment Manufacturing (Local Inspection Institute), Product Brand Copy

⑵ As-built drawings, 1 set each (provided with the equipment)

Each set of strength calculation documents (supplied with the equipment)

Each unit comes with 1 instruction manual (provided with the equipment)

⑸ 1 equipment process diagram and 1 basic reference diagram (to be provided within 7 days of contract signing)

⑹ 1 set of product compliance certificates, 1 calibration report for instruments (provided with the equipment)

LNG Storage Tank

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 same 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. Equipped with unique high-vacuum insulation technology, they offer excellent insulation properties, long-lasting vacuum maintenance, and extremely low operating costs. Modular pipeline systems and high-configured components enhance the equipment's performance and durability while reducing maintenance costs, significantly boosting your competitive edge.

Introduction:

Low-temperature insulation tanks are of the vacuum powder insulation type, consisting of a double container structure made up of an inner container and an outer container, which can be divided into vertical and horizontal types. The inner container is made of austenitic stainless steel, specifically S30408, depending on the medium it contains. The outer container material varies according to the user's location, with Q345R being used. The space between the inner and outer containers is filled with pearlite insulation material and then evacuated to create a vacuum.

Usage:

Storage of 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 and then vacuumed. The standard vacuum level after the sandwich is sealed is:

Seal Vacuum Gauge

Design Parameters:

Design Pressure: 0.84 Mpa, 1.32 Mpa, 1.68 Mpa

Working Pressure: 0.8 MPa, 1.2 MPa, 1.6 MPa

Design Temperature: -196°C

Operating Temperature: -196°C

Effective Volume: 2.5 m3, 3.5 m3, 5 m3, 10 m3, 15 m3, 20 m3, 30 m3, 50 m3, 60 m3, 100 m3

Definition:

LNG stands for Liquefied Natural Gas.

The primary component is methane. LNG is colorless, odorless, non-toxic, and non-corrosive, with a volume approximately 1/600th of the same amount of gaseous natural gas. Its weight is about 45% of the same volume of water, and its calorific value is around 52 MMBtu/ton (1 MMBtu = 2.52×10^8 calories).

Formed:

The natural gas produced from the gas field is first purified, then liquefied at ultra-low temperatures (-162℃) under atmospheric pressure to form liquefied natural gas.

The critical temperature of LNG between gas and liquid states 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 for storing LNG, a type of special equipment.TwoSimilar pressure vessels, made of 06Ni9DR material, have undergone flaw detection, hydrostatic and pneumatic testing, on-site inspection by the Technical Supervision Bureau, and issued with a pressure vessel inspection certificate. The manufacturing process is completed with external rust removal and painting, etc. The liquefied gas storage tank has strict quality assessment for the material, appearance dimensions, weld quality, operational quality, installation quality, internal equipment, and safety accessories.

Routine physical and chemical tests for the tank material, such as mechanical properties and chemical composition.

The welding joints, welds, tank end caps, and the mutual geometric positions of all pressure components are rigorously inspected through X-ray non-destructive testing and magnetic particle inspection. Tests are conducted on the product's sealing, pressure resistance, and all technical indicators that could affect the safe operation of the product.

1. Natural Gas Storage Tank LNG Storage System: The LNG storage system consists of low-temperature storage tanks, 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, typically use austenitic stainless steel pipes for LNG pipelines. Austenitic stainless steel pipes offer excellent low-temperature properties.

4. Vertical natural gas storage tanks (LNG tanks) with vacuum powder insulation technology. The inner cylinder and pipeline materials are made of OCr18Ni austenitic stainless steel, while the outer cylinder is made from high-quality carbon steel Q345R pressure vessel steel plate. Our company offers a variety of specifications, including 50-100 cubic meters of liquefied natural gas storage tanks.

5. Applications of Natural Gas Storage Tanks: Chemical fuel, residential fuel, automotive fuel, combined power generation, heat pumps, fuel cells, etc.

6. Natural Gas Storage Tank Liquefaction Process: Cascading Liquefaction Process, Mixed Refrigerant Liquefaction Process, Liquefaction Process with an Expander.

7. The natural gas liquefaction plant consists of pre-treatment process, liquefaction process, storage system, control system, and fire protection system, etc.