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Dominion Gas

Scientific and Analytical Gases

Argon (Ar) Helium (He) Hydrogen (H2) Nitrogen (N2) Oxygen (O2)

Argon (Ar) is a monatomic, chemically inert gas composing slightly less than 1% of the air. Its gaseous specific gravity is 1.38 and its boiling point is -302.6°F (-185.9°C). Argon is colourless, odourless, tasteless, non-corrosive, non-flammable, and non-toxic. Commercial argon is the product of cryogenic air separation, where liquefaction and distillation processes are used to produce a low-purity "crude" argon product which is then purified to the commercial product. Argon is used primarily for its properties as an inert gas in applications such as arc welding, steelmaking, heat treating, and electronics manufacturing.

Argon (Ar) Helium (He) Hydrogen (H2) Nitrogen (N2) Oxygen (O2)

Helium (He) is the second lightest element (hydrogen being the lightest) with a gaseous specific gravity of 0.138. It is a colourless, odourless, tasteless inert gas at room temperature and atmospheric pressure. Its boiling point is –452.1°F (–268.9°C) at atmospheric pressure. Helium is present in dry air at a concentration of 0.0005%. Its principal source is natural gas wells where the helium is extracted from the crude natural gas stream and purified. Helium can be stored and shipped either as a gas or a cryogenic liquid. Helium is widely used as an inert gas in the arc welding process. Helium is also used as a carrier gas for gas chromatography. Also, its low specific gravity and non-flammability allow its use in lighter-than-air applications such as the filling of balloons and blimps. Mixtures of helium and oxygen are used as a breathing gas for deep-sea diving. Liquid helium is used in superconducting magnet applications, including magnetic resonance imaging (MRI).

Argon (Ar) Helium (He) Hydrogen (H2) Nitrogen (N2) Oxygen (O2)

Hydrogen (H2) makes up 98% of the known universe, and it is the third most abundant element on the earth's surface. It is the lightest of all the gases, with a gaseous specific gravity of 0.0695. It is a component of water, minerals and acids, and it makes up a fundamental part of all hydrocarbons and organic substances. At atmospheric temperatures and pressures, hydrogen exists as a gas; however, it liquefies at -252.9°C (-423°F). Next to helium, it is the coldest known fluid. Hydrogen is one of the materials now being considered as an alternative fuel because it is renewable, abundant, efficient, and unlike other alternatives, produces zero emissions. Many believe that this versatile material will become a primary fuel and energy carrier of the future.
Argon (Ar) Helium (He) Hydrogen (H2) Nitrogen (N2) Oxygen (O2)

Nitrogen (N2) constitutes 78.03% of the air, has a gaseous specific gravity of 0.967, and has a boiling point of -320.5°F (-195.8°C) at atmospheric pressure. It is colourless, odourless, and tasteless. Nitrogen is often used as an "inert" gas due to its non-reactive nature with many materials. However, nitrogen can form certain compounds under the influence of chemicals, catalysts, or high temperature. Commercial nitrogen is produced by a variety of air separation processes, including cryogenic liquefaction and distillation, pressure swing adsorption (PSA), and membrane separation. Gaseous nitrogen is used in the chemical and petroleum industries for storage tank blanketing and vessel inerting applications. It is also used extensively by the electronics and metals industries for its inert properties. Liquid nitrogen, produced by the cryogenic air separation process, finds wide use as a refrigerant in applications such as cryogenic grinding of plastics and food freezing.

Argon (Ar) Helium (He) Hydrogen (H2) Nitrogen (N2) Oxygen (O2)

Oxygen (O2) constitutes approximately 21% of the air, has a gaseous specific gravity of 1.1, and has a boiling point of -297.3°F (-183°C). Oxygen is produced by air separation processes that use either cryogenic liquefaction and distillation or vacuum swing adsorption (VSA) separation. Oxygen can be stored and shipped as either a gas or a cryogenic liquid. The principal uses of oxygen stem from its strong oxidizing and life-sustaining properties. It is used in medicine for therapeutic purposes and in the metals industry for steelmaking and metal-cutting applications. In the chemical and petroleum industries, oxygen is used in the production of a wide variety of fuels and chemicals. Oxygen is used in the pulp and paper industry for a variety of applications, including pulp bleaching, black liquor oxidation, and lime kiln enrichment. In the glass industry, oxygen/fuel combustion is used to reduce particulate and NOx emissions in melting operations.

 

Cylinders - Sizes and Connections

High Purity Argon, Helium and Nitrogen can be supplied in either 47.2 L cylinders or in quads of 16, 48 or 64 cylinders. All of our standard cylinders are fitted with BS3 connections.

Gases - Specifications

Products HP Argon HP Helium HP Nitrogen
Specifications      
O2 < 10 ppm < 10 ppm < 10 ppm
H2O < 10 ppm < 10 ppm < 10 ppm
THC* < 1 ppm < 1 ppm < 1 ppm
CO + CO2 < 1 ppm < 1 ppm < 1 ppm
H2 NA** NA NA
Halocarbons NA NA NA
N2 < 5 ppm < 5 ppm  
Certification Batch, Conformance Individual Cylinder Individual Cylinder

* THC = total hydrocarbons
** NA = not analysed

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