How much is a babjehec-known liquefied natural gas tank?

LNG Natural Gas Storage Tank, Liquid Low-Temperature Container

Low-temperature liquefied natural gas storage equipment is widely used in various industries of the national economy, including industry, agriculture, national defense, and scientific research. The application of natural gas storage equipment is increasingly widespread, primarily due to its advantages over traditional steel cylinders, such as ease of transportation, energy savings, safety and reliability, purity assurance, and versatility. China's low-temperature storage tanks are developing towards high quality, diverse varieties, and large capacities.

Low-temperature liquid storage tanks are high-vacuum insulated stainless steel pressure vessels, designed for storing, transporting, and using liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, or carbon dioxide. These low-temperature containers are manufactured according to GB18442 standards and are used for reliable and cost-effective transportation and storage of low-temperature liquids, as well as for on-site storage and supply of low-temperature liquid gases across a wide range of applications.

Manufactured fixed pressure vessels meet the following regulations and standards:

1. TSG 21-2016 "Safety Supervision Regulations for Fixed Pressure Vessels"

2. GB150.1-150.4-2011 "Pressure Vessels"

3. NB/T47014-2011 "Welding Process Qualification for Pressure Equipment"

4. NB/T47015-2011 "Code for Welding Procedure of Pressure Vessels"

5. GB/T25198-2010 Pressure Vessel End Cap

6. NB/T47013-2015 Non-Destructive Testing of Pressure Equipment

7. NB/T47016-2011 "Mechanical Property Testing of Welded Specimens for Pressure Equipment Products"

8. JB/T4711-2003 "Coating and Packaging for Pressure Vessels"

9. GB/T18442-2011 "Fixed Vacuum Insulation Low-Temperature Pressure Vessel"

A low-temperature storage tank is a pressure vessel used for storing various cryogenic liquids, such as natural gas tanks, LNG tanks, liquid oxygen tanks, liquid argon storage vessels, and low-temperature liquid nitrogen tanks. Therefore, its safe operation rules should consider factors such as the gas risk characteristics, cryogenic maintenance effects, surrounding environmental conditions, and pressure vessel characteristics. So, what are the specific operation rules for low-temperature storage tanks? Let's find out together below.

1. Types of facilities and fire separations

The types of low-temperature storage tanks produced are classified as Class B, with the minimum fire resistance grade of Grade II. The fire separation between low-temperature storage tanks should not be less than half the diameter of the larger tank among the adjacent two tanks. There are no fire separation requirements for oxygen storage tanks with a volume of 50 m3 or less and their operational buildings. The spacing between nitrogen and argon storage tanks should meet construction and maintenance requirements and should not be less than 2 meters.

2. Lightning and Static Electricity Protection

The low-temperature storage tank area must be equipped with lightning and static electricity grounding devices. A qualified unit should be invited to inspect the grounding resistance regularly every year. The equipment, pipes, and flanges on the low-temperature storage tank, as well as the threaded joints, should be bridged with metal wires, with the bridging resistance being less than 0.03Ω.

Establish strict procedures for the distribution, collection, and on-site management of low-temperature steel materials, which is a crucial quality assurance method for the manufacturing of low-temperature pressure vessels. Particularly in the manufacturing site, as low-temperature steel can easily be mixed with general steel, without stringent management, it poses significant safety risks. Low-temperature steel and welding rods should be handled separately with dedicated storage. After technical briefings, construction personnel and management staff must be familiar with the identification of low-temperature steel and welding rods to prevent confusion with other types of steel. A record should be kept for the incoming and outgoing materials, and any remaining materials should be promptly re-labeled. The surface quality of low-temperature steel requires high standards, and during storage and transportation, the surface should be protected and color-coded labels should be used for identification. Cutting and material preparation should be supervised by material management personnel and color-coded labels should be transferred promptly. The surface of low-temperature steel should not be marked with steel stamps. Plate materials and semi-finished products should be categorized by batch number and standard and stored on shelves. Pre-formed materials should be stored on racks or supports. It is strictly forbidden to place low-temperature steel materials, especially焊接 materials, directly on the ground. The distance from the support to the ground and walls should be no less than 300mm. The welding rod storage area should comply with relevant welding material management regulations, with the temperature not below 10°C and relative humidity not exceeding 60%, with proper records maintained. Welding rods should be dried at the specified temperature for 2 hours before use and then stored in a constant temperature drying box (100-150°C).

In the pressure vessels currently used in petrochemical enterprises, low-temperature pressure vessels account for a certain proportion. Due to their lower operating temperatures, the brittleness of the vessel materials increases accordingly. Under the effect of tensile stress on the pressurized components, brittle fractures may occur suddenly when the stress level is below the material's yield strength or allowable stress. Such fractures typically occur with no or only minor plastic deformation before and after, without overall yielding, making them difficult to detect in everyday production and posing a greater safety threat to petrochemical production. Therefore, for low-temperature pressure vessels, there must be an enhanced level of requirements for design, material selection, manufacturing, and inspection compared to non-low-temperature pressure vessels.

LNG Natural Gas Storage Tanks, Liquid Low-Temperature Vessels

30, 60, 100 cubic meter LNG storage tanks

30, 60, and 100-cubic-meter LNG tanks are commonly used in our production. It's believed that this new type of LNG tank will be quickly embraced by a wide range of users. Compared to conventional tanks, the LNG tank offers enhanced safety. LNG tanks can be categorized by size: small LNG tanks, ranging from 5 to 30 cubic meters, are often used in residential gas vaporization stations and LNG vehicle refueling stations; medium-sized LNG tanks, from 30 to 150 cubic meters, are commonly used in satellite liquefaction units and are the ideal choice as a replacement for standard tanks.

1. The storage system for LNG tanks consists of low-temperature storage tanks, affiliated pipelines, and control instruments, yet it falls under the category of low-temperature storage tanks.

2. All lng storage tank pipelines are made of austenitic stainless steel tubes. Austenitic stainless steel tubes offer excellent low-temperature properties.

3. Available in vertical (lng) storage tanks, these tanks utilize vacuum powder insulation technology for heat insulation. The inner tank and pipes are made of Austenitic S30408 stainless steel, while the outer shell is constructed from high-quality carbon steel Q345R pressure vessel steel plate. These lng storage tanks not only have a long lifespan but are also extremely safe to use, having gained widespread recognition.

30, 60, 100 cubic meter LNG storage tanks, LNG gasification station, and vehicle refueling station process and equipment selection