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Nitrogen

Buy liquid nitrogen or buy compressed nitrogen (N 2 )

Praxair offers compressed nitrogen and liquid nitrogen (N 2 ) in various purity and concentrations. For more information on purchasing Praxair liquid nitrogen and nitrogen, see the table below.

product name concentration
Compressed nitrogen (N 2 ) High purity> 99.999%
Low purity> 90%
Frozen liquid nitrogen (N 2 ) on-site purification > 99.999%
Ultra-high purity> 99.9999999%
Nitrogen-argon mixture 1 ppm-99.99%
Nitrogen and helium mixture 1 ppm-99.99%
Nitrogen and hydrogen mixture 1 ppm-99.99%
Nitrogen and oxygen mixture 1 ppm-99.99%

Praxair develops grades for each application. Call Praxair and we will determine the most appropriate supply method based on your operational needs.

Uses and applications of nitrogen and liquid nitrogen in various industries

Aerospace

Nitrogen is an indispensable gas in the aerospace industry. It is mainly used in high Reynolds number wind tunnels, heat treatment furnaces and autoclaves to assist in the manufacture of extremely lightweight materials. In addition, nitrogen can be used as a laser cutting auxiliary gas.

Automotive and transportation equipment

The 1s and 2s layers of the assembly shop use nitrogen and other welding gases to weld automobile parts, frames, mufflers and other components, because nitrogen can provide the necessary gas environment for the strong welding of any material. In addition, nitrogen is an important safety component of airbags.

Chemicals

Nitrogen is used as a pressurized gas to push liquids through pipes. It can be used to protect oxygen-sensitive materials from air interference and to remove volatile organic chemicals from the process.

energy

As an inert industrial gas, nitrogen can be used as a covering agent to isolate sensitive products and processes from the air. It can also be used as a purification agent to prevent pipeline and equipment pollution.

food and drink

Nitrogen is an important refrigerant for cooling, refrigeration and food freezing. Due to the extremely low freezing temperature of nitrogen, liquid nitrogen immersion freezing is the most efficient freezing method currently known for IQF foods. Nitrogen also plays an important role in reducing food spoilage, discoloration and taste, and strengthens the protective performance of retail packaging.

medical insurance

Nitrogen NF can be used as a cryogen to freeze and preserve blood, tissues and other biological samples. It can also freeze and destroy diseased tissue during cryosurgery and skin surgery. In addition, nitrogen can also power medical devices.

Metal production

As a carrier and purification gas for steel production, nitrogen is used to prevent oxidation and is a key component in heat treatment.

Petroleum gas

The petroleum and natural gas industry uses nitrogen to increase reservoir reserves and fracture hydrocarbon-bearing layers, thereby significantly increasing oil and gas production and improving operating efficiency.

Medicine and Biotechnology

Nitrogen is commonly used for purge, pressure transfer, mixing, and masking-to protect specific processes from moisture, oxidation, degradation, and contamination. Cryogenic liquid nitrogen is used to control the temperature of reactor cooling facilities, and biological samples can also be stored

Refining

As an industrial gas used to protect storage tanks and purification pipelines, nitrogen can also remove volatile organic compounds (VOC) from chemical process streams and wastewater, reducing volatile organic compound emissions.

Welding and metalworking

Nitrogen can be used as a purifying gas for welding stainless steel pipes. It can also be used as a laser cutting auxiliary gas and enhanced plasma cutting.

View applications of this gas in other industries.

diving
electronic
Glass manufacturing
laboratory

Supply of liquid nitrogen and nitrogen (N 2 ): storage tanks, dewars, containers and cylinders

Cylinders and liquid gas containers

For smaller and more specialized applications, Praxair uses high-pressure steel cylinders for nitrogen supply and liquid nitrogen through Dewar bottles of various sizes.

Bulk and minor gas delivery

Praxair's bulk gas and liquid delivery system is equipped with nitrogen tanks of various purity and sizes according to your site operation. It also provides small liquid "buy-guaranteed" gas supply as an alternative to steel and dewar Program.

pipeline

Praxair's pipeline supply system is flexible and economical. It can provide customers with extremely reliable nitrogen supply for daily nitrogen consumption.

On-site production

For customers with high demand for high-purity nitrogen, our on-site cryogenic air separation equipment can provide a reliable supply source. Praxair low temperature nitrogen production equipment (nitrogen equipment) and non-low temperature nitrogen equipment can meet the purity (over 90%) and output requirements of various products. Our equipment is efficient, reliable, and cost-effective at any given pressure and purity level.

Not sure which option is right for you?

Praxair provides a wide range of gases for any application anywhere in the world in a safe, reliable and efficient manner with its large scale and coverage. Call Praxair and we will develop the best supply plan for your specific operation.