Huzhou Boiler Factory Co., Ltd.

Liquefied Natural Gas (LNG) storage tanks consist of the tank body, instruments, pipelines, valves, etc. These tanks feature two types of liquid inlet methods, the upper and lower sections, which can be chosen and used according to 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 and the other in standby. If the operating safety valve trips, the manual pressure relief valve is immediately opened to relieve pressure below the tank's operating pressure. Simultaneously, the safety device is swiftly switched to the standby system via the manual handle, effectively ensuring the tank's safety. This safety system device consists of safety valves, explosion-proof devices, vent valves, and three-way ball valves, which not only reduces pipeline welding but also features excellent fire and electrostatic protection structures. Additionally, the safety relief openings on the housing are designed to ensure the entire equipment's safety and reliability. Low-temperature pipelines are centrally extracted for ease of operation and control, and the extraction point is constructed with Dura tube to meet low-temperature requirements and reduce stress on the pipeline due to thermal expansion and contraction, ensuring the tank's safety. Vacuum valves are sealed with three "O" rings to effectively ensure the reliability of the sandwich seal, and are made of full stainless steel, being compact in size. The top of the LNG storage tank is designed with a吊挂 structure for ease of transportation, lifting, and installation. The unique工艺manhole design ensures internal cleanliness when the inner container is sealed. Vacuum isolation valves and combined vacuum gauge valves are used on the LNG storage tank for easy measurement of the vacuum degree in the tank's sandwich layer and maintenance, extending the tank's lifespan 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 pearlescent sand, with the following performance parameters:

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

Moisture Content (Weight) % < 0.1

5 Non-puffing Rate % ≤ 1

6 Temperature ℃ -200℃ ~ 600℃

7 pH Level: 6.5-7.5

III. Inspection, Testing, and Acceptance

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

2. All welds are inspected according to the GB150.1-150.4-2011 standards and drawings. After passing the inspection, Class A and B welds are subjected to 100% X-ray inspection, Class C and D welds undergo 100% penetrant testing, and a test report is issued.

3. After the cylinder assembly is completed, the geometric dimensions, pipe end orientation, and shape deviation are inspected in accordance with the GB150.1-150.4-2011 standards and drawings.

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

5. After the interlayer leak test passes, fill with pearlescent sand and then evacuate. Seal the vacuum after achieving the requirements of GB/T18442-2011 standard.

Section 4: Technical Documents

1. Upon contract signing, the seller shall provide the buyer with the following technical data:

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

Including: Certificate of Material for Main Pressure Components, Material List, Structural Dimension Inspection Report, Inspection Plan, Product Qualification Certificate, Pressure Vessel Product Data Sheet, Welding Records, Non-destructive Testing Report, Pressure Test Report, Special Equipment Manufacturing Supervision and Inspection Certificate (Local Inspection Authority), Product Brand Copy

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

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

Each with 1 user manual (provided with the equipment)

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

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

LNG Storage Tank

LNG stands for Liquefied Natural Gas. It is primarily composed of methane. LNG is colorless, odorless, non-toxic, and non-corrosive, with a volume about 1/600th that of its gaseous form. The weight of LNG is approximately 45% of the same volume of water, and its calorific value is around 52 MMBtu/ton (1 MMBtu = 2.52 x 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 storing and using deep cryogenic liquids such as liquid oxygen, liquid nitrogen, liquid argon, liquid carbon dioxide, liquid natural gas, and liquid ethylene, featuring 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, reduce maintenance costs, and significantly boost your competitive edge.

Introduction:

Low-temperature insulated storage tanks are of vacuum powder insulation type, consisting of a double-container structure composed of an inner container and an outer container, which can be categorized into vertical and horizontal types. The inner container, selected material is Austenitic stainless steel, specifically S30408, based on the medium it contains. The outer container material is selected as Q345R depending on the user's region, with the interlayer between the inner and outer containers filled with insulation material called mica sand and then vacuumed.

Application:

Liquid Oxygen (LO2), Liquid Nitrogen (LN2), Liquid Argon (LAr), Liquefied Natural Gas (LNG), Liquid Carbon Dioxide (LCO2)

Thermal Insulation Performance:

Insulation materials use pearl sand filling in the sandwich layer under high temperature conditions and vacuum extraction. After the sandwich layer is sealed, the standard vacuum degree 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℃

Operating Temperature: -196°C

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

Definition:

LNG stands for Liquefied Natural Gas.

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

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 states at atmospheric pressure is -162°C.

The standard commonly used in LNG manufacturing is API 620 of the American Petroleum Institute.

Meaning:

Liquefied Natural Gas (LNG) storage tanks are specialized products for storing liquefied natural gas, a type of special equipment.TwoType pressure vessels, 06Ni9DR material, completed with flaw detection, hydraulic and pneumatic tests, on-site inspection by the Technical Supervision Bureau, issuance of pressure vessel inspection certificate, and processes such as external rust removal and painting. Liquefied gas storage tanks undergo rigorous quality assessment of the material, dimensions, weld quality, operational quality, installation quality, internal equipment, and safety accessories.

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

The welding joints, welds, tank end caps, and the mutual geometric positions of all pressure elements 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. LNG Storage Tank 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 refueling stations, etc.

Medium-sized natural gas storage tanks, 50-100 cubic meters, commonly used in satellite liquefaction units, industrial gasification stations, etc.

3. Natural gas storage tanks, typically use austenitic stainless steel pipes for LNG pipelines. Austenitic stainless steel pipes exhibit excellent low-temperature properties.

4. Vertical natural gas storage tanks (LNG tanks) with vacuum powder insulation technology for thermal insulation. The inner cylinder and pipeline materials are made of OCr18Ni austenitic stainless steel, while the outer cylinder is constructed from high-quality carbon steel Q345R pressure vessel steel plate. Our company offers a variety of specifications ranging from 50 to 100 cubic meters for 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 Processes: Cascade Liquefaction Process, Mixed Refrigerant Liquefaction Process, Expansion Turbine Liquefaction Process.

7. The natural gas liquefaction facility consists of a natural gas pretreatment process, liquefaction process, storage system, control system, and fire protection system.