Cryogenic Tank Safety

Liquid oxygen, liquid nitrogen and liquid argon are cryogenic liquids. Their boiling temperatures are:

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• Liquid Oxygen -297.3°F | -183°C
• Liquid Nitrogen -320.4°F | -195.8°C
• Liquid Argon -302.6°F | -185.9°C

The sublimation point of Liquid CO2 is -109.3°F | -78.5°C.

To minimize heat transfer and sustain very low temperatures, the storage vessel must be specially designed. Storage vessels for liquid oxygen, liquid nitrogen and liquid argon are commercially available in various capacities from 350 to 13,000 U.S. gallons (1,325 to 49,210 liters) water capacity. The storage vessels may be either vertical, spherical, or horizontal depending on the site and consumption requirements for Cryogenic Bulk Tanks.

Cryogenic liquids storage vessels have three basic components:

1. Inner Pressure Vessel
   A vessel usually made of stainless steel or other materials that have favorable strength characteristics when exposed to cryogenic temperatures.


2. Outer Vessel
   A vessel made of carbon steel or stainless steel. Under normal operating conditions, this vessel retains the insulation around the inner pressure vessel, and can also maintain a vacuum around the inner vessel. Typically, the outer vessel is not exposed to cryogenic temperatures.


3. Insulation
   The space between the inner and outer vessel, containing several inches of insulating material maintained in a vacuum. The vacuum and insulating material help to reduce heat transfer and thereby reduce the boil-off of the liquid oxygen, liquid nitrogen or liquid argon stored within the vessel.

The inner vessel of the storage tank is typically designed to sustain a maximum allowable working pressure of 250 psig ( kPa). Vessels may be fabricated for higher or lower working pressures and special applications. The service pressure of the vessel is adjustable.

Caution: Storage Facility Maintenance

Only authorized and trained personnel should maintain and operate the liquid oxygen, liquid nitrogen or liquid argon storage facility and its components. Safety concerns should be reported immediately.

General Safety Rules for Liquid Oxygen, Liquid Nitrogen and Liquid Argon

The following are general safe handling rules for liquid oxygen, liquid nitrogen and liquid argon:

• Do not store liquid oxygen, liquid nitrogen or liquid argon in confined spaces or poorly ventilated areas.
• Ensure that cryogenic liquids are handled only by persons instructed in the properties of the material and in the proper procedures for handling it.
• Ensure that all piping in which cryogenic liquids could be trapped between two valves and receptacles is equipped with pressure relief valves that are piped to properly designed vents.
• vDo not smoke or create sparks near liquid oxygen equipment and tanks. Do not approach liquid oxygen tanks with an open flame.

Cryo Station Layout

Cryogenic Storage Tank Specifications - Oxygen, Nitrogen and Argon

Cryogenic Storage Tank Specifications - Carbon Dioxide - Horizontal

Cryogenic Storage Tank Specifications - Carbon Dioxide - Vertical

Product Description

Horizontal Welded Insulated Tank Cryogenic Liquid Gas Cylinder Storage Dewar      

What is a dewar tank?

A dewar tank, also known as a Dewar flask or simply a Dewar, is a specialized container used for storing and transporting cryogenic liquids, such as liquid nitrogen, liquid oxygen, or liquid helium. It is designed to keep these substances at extremely low temperatures, close to or at their boiling points, which can be as low as -196 degrees Celsius (-321 degrees Fahrenheit) for liquid nitrogen.

Why is it called a dewar?

The Dewar tank is named after its inventor, Sir James Dewar, a Scottish physicist and chemist who developed the container in the late 19th century. The primary purpose of a Dewar tank is to provide excellent thermal insulation to prevent the cryogenic liquid inside from rapidly evaporating.

Cryogenic Liquid Nitrogen Dewars Structure

The construction of a Dewar tank usually consists of two main parts:

Inner Vessel: This is a double-walled container with an inner and outer chamber. The inner chamber holds the cryogenic liquid, while the space between the inner and outer walls is usually evacuated or filled with a vacuum to minimize heat transfer through conduction and convection.

Outer Jacket: The outer jacket surrounds the inner vessel and acts as an additional layer of insulation. It is typically made of metal and helps to further reduce heat transfer from the surrounding environment.

Dewar tanks are commonly used in scientific research, industrial applications, and medical facilities for a variety of purposes, such as preserving biological samples, freezing and storing cells, and providing a continuous supply of cryogenic substances for experiments and medical treatments.

Due to their efficiency in maintaining extremely low temperatures, Dewar tanks play a crucial role in various fields that require the storage and handling of cryogenic materials.

SERLNG are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

Product Parameters

We are a professional manufacturer of customized cryogenic liquid nitrogen Dewar tanks, please tell us your needs, and contact us to obtain customized information about Dewars.

Production Process

The gas cylinder is easy to use, safe and reliable, economical and durable. The special features are as follows

1.The support system of the inner tank is made of stainless steel to achieve the purpose of low heat loss and high strength.

2. It is easy to use and can be operated independently by a single person.

3. Store pure cryogenic liquid. Large storage capacity. The gas storage capacity of a DP175 Dewar cylinder is equivalent to more than 18 times the gas storage capacity of a standard high-pressure gas cylinder.

4. The internal pressure of the gas cylinder will rise during the deactivation phase after filling. The gas cylinder has a high-performance insulation system, and its pressure rise rate is low. Under normal circumstances, there is no need to reduce the pressure through a safety valve.

5. The built-in supercharger and vaporizer can realize continuous supply of gas or liquid, and there is no need to install an external vaporizer under the designed dosage.

Note: When filling natural gas, use double safety valves and eliminate the rupture disc in the inner tank.

Caution: Adjusting the top screw of the combined pressure regulator does not accelerate the pressurization speed. Adjusting the top pin of the combined pressure regulator at will will result in combined pressure regulation. The valve will be damaged.
 

Packaging & Shipping

Dewar Tanks will be packaged by high quality export wooden boxes.
Standard model dewar tanks will be dliveried within 7 days.

FAQ

1. What information needed if we sent you the inquiry of the tanks?
The capacity, working pressure and the working medium is most important, and then your special request is also very important. If possible, tell us the usage, this will help us recommend the most appropriate tanks for you.

Contact us to discuss your requirements of Horizontal Liquid Dewar Cylinder. Our experienced sales team can help you identify the options that best suit your needs.