Industrial Gas Supply -

x Industrial Gases

Unmatched Product Range. Measurable Savings.
Versatility In Delivery Options

That sums up Airgas’ position with industrial gases. We offer industrial gas products as diverse as the industries we serve. We provide attractive economies of scale because of the purchasing power of our national network. And we have proven delivery systems for every application and location.


Argon (Ar) - 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 colorless, odorless, tasteless, noncorrosive, nonflammable and nontoxic. 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.

Carbon Dioxide (CO2) - a nonflammable, colorless, odorless gas. Found in air at concentrations of about 0.03%, carbon dioxide may exist simultaneously as a solid, liquid and gas at a temperature of –69.9°F (-56.6°C) and a pressure of 60.4 psig (416 kPa). At a temperature of –110°F (-79°C) and atmospheric pressure, carbon dioxide solidifies forming “dry ice” at a density of 97.4 pounds per cubic foot. Because of its low concentration in the atmosphere, air is not a suitable feedstock for carbon dioxide production. Instead, CO2 is obtained from by-product streams from various manufacturing processes. Bulk quantities of carbon dioxide are usually stored and shipped as liquid under pressure and refrigeration.

Although not an inert, carbon dioxide is nonreactive with many materials and is often used for inerting purposes, such as blanketing and purging of tanks and reactors. It’s also used as a shielding gas in the arc welding process. Carbon dioxide is the source of the bubbles in soft drinks and other carbonated beverages. It’s used to fill certain types of fire extinguishers that rely on its inert properties, density, and low temperature when released from high-pressure storage. In addition to its “inert” properties, carbon dioxide, as dry ice, is used to freeze a variety of foods.

Helium (He) - the second-lightest element (hydrogen being the lightest) has a gaseous specific gravity of 0.138. It’s a colorless, odorless, 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 a natural gas well where the helium is extracted from the crude natural gas stream and purified. Helium can be stored and shipped either as a gas or cryogenic liquid.

Helium is widely used as an inert gas in the arc welding process. And because of its low specific gravity and nonflammability, it’s often used in lighter-than-air applications such as the filling of balloons and blimps. Mixtures of helium and oxygen are used as a breathing gas in deep-sea diving. Liquid helium is also used in superconducting magnet applications, including magnetic resonance imaging (MRI).

Hydrogen (H2) - the lightest element, has a gaseous specific gravity of 0.0695 and a boiling point of –423°F (-252.8°C) at atmospheric pressure. It’s a colorless, odorless, tasteless, flammable gas found at concentrations of about 0.0001% in air. Hydrogen is produced by several methods, including steam/methane reforming, dissociation of ammonia, and recovery from by-product streams during chemical manufacturing and petroleum reforming. Hydrogen is stored and transported as either a gas or a cryogenic liquid.

Hydrogen is widely used in petroleum refining processes, such as hydrotreating, catalytic reforming and hydrocracking. It’s a raw material for many chemical processes ranging from manufacturing high-density polyethylene and polypropylene resins to the hydrogenation of food-grade oils. Hydrogen is also used as a reducing gas in metals processing operations. In the electronics industry, helium is used in manufacturing silicone wafers and computer chips. Rocket engine fuel is another major use for hydrogen.

Oxygen (O2) - constitutes approximately 21% of the air we breathe, 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 using either cryogenic liquefaction and distillation or adsorption technologies. Oxygen can be stored and shipped as either a gas or a cryogenic liquid.

The principal uses of oxygen are indicative of its strong oxidizing and life-sustaining properties. It’s used in medicine for therapeutic purposes and in the metals industry for steel-making and metal-cutting applications. In the chemical and petroleum industries, oxygen is used in the production of fuels and chemicals. O2 is used in the pulp and paper industry for a variety of applications, including pulp bleaching, black liquor oxidation and lime kiln enrichment. Oxygen/fuel combustion is used in the glass industry to reduce particulate and NOx emissions in melting operations.

Nitrogen (N2) - makes up 78.03% of air, has a gaseous specific gravity of 0.967 and a boiling point of –320.5°F (-195°C) at atmospheric pressure. It is colorless, odorless and tasteless. Nitrogen is often used as an “inert” gas because of its nonreactive 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, adsorption separation and membrane separation.

In the chemical and petroleum industries, gaseous nitrogen is used for storage tank blanketing and vessel inerting applications. It is also used in the electronics and metals industries because of its inert properties. Liquid nitrogen, produced by the cryogenic air separation process, is widely used in refrigerant applications such as cryogenic grinding of plastics and food freezing.

Shielding Gases and Mixtures for Welding - increase the efficiency of the welding process by creating an ideal environment that stabilizes the arc, improves fluidity of the molten metal, and improves the quality of the weld deposit.

The Airgas Gold Gas® shielding gas product line consists of seven premium mixtures that meet the stringent requirements of for MIG, TIG, flux-cored and robotic applications.

Acetylene (C2H2) - a colorless, flammable gas, with a garlic-like odor. Its combustion in pure oxygen produces the highest achievable flame temperature, over 3300°C, releasing 11,800 J/g, allowing it to be used in welding, cutting, brazing, and soldering metals. The oxy-acetylene torch can be used to repair ships underwater, to construct bridges, pipelines, dams, tunnels, buildings and to reinforce concrete.

Propylene(C3H6) - a flammable, colorless liquefied gas with a detectable odor. High-purity propylene is used as an alternative fuel for welding and cutting and is marketed by Airgas under the private AGFuel brand.

Propane (C3H8) - a colorless, flammable liquefied gas is also marketed by Airgas as an alternative fuel for welding and cutting.


Related Information

Welding Process Sell Sheet

Gold Gas Brochure

Gold Gas Sell Sheet

Physical Properties

Explosive Limits

Threshold Limit Values

Cylinder Specifications & Conversion Chart

Laser Brochure

Bulk Gas Brochure

MicroBulk Sell Sheet

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PRISM Nitrogen Membrane Systems Cabinet Series
PRISM Nitrogen Membrane Systems 3000 Series