Experts in Gas Cabinets

Axenics has more than 30 years of experience in building gas cabinets, gas boxes and gas panels for a variety of industrial applications. Through our work with a variety of companies in a range of industries, we have found that terms “gas cabinet” and “gas box” are used interchangeably.

Our experienced engineers and supply chain experts work directly with our customers and materials suppliers from the initial design phase through manufacturing and delivery.

Gas cabinets not only contain the gas itself, but also house the controls and sheet metal to protect the gas panel as well as the surrounding environment. There is also room inside the gas box or gas cabinet for gas canisters and cylinders. Gas boxes protect people from being exposed to potentially harmful gases.

Axenics takes every precaution to ensure that a gas cabinet is built to specifications precise to the manufacturing operation, while making sure to use materials and components that are suitable to the characteristics of each gas. You can contact our in-house engineers to discuss gas box options and to decide on the type of gas that would be appropriate for your project.

This larger skid build shows you some of the gas cabinets we have the ability to do.

Gas Panels Built to Specification

Axenics builds gas panels to customer order specifications and designs. Calling on our in-house engineering and design capabilities, we help our customers determine the right type of gas panel based on what they are trying to accomplish, and then we build what you need – valves, regulators, pipes, controls, etc.

Gas panels can be installed inside gas boxes or can be independent of the gas tanks/cylinders. Gas panels are relatively simple devices while gas boxes or cabinets are more complex.

Axenics is well qualified to build efficient handling systems for gas, liquid and chemical delivery. We build custom sub-assemblies of complex gas boxes designed to fit your specific needs. We are dedicated to providing an end product that is of superior quality and that it is also delivered on time and within budget.

Gas Cabinet Safety

To address gas cabinet safety concerns while also providing a centralized delivery system, gas panels and gas boxes manufactured by Axenics can provide an efficient way to deliver the right amount of gas to each workstation. In addition, implementation of these systems allows for gas cylinder switch-outs to happen more conveniently, with less disruption to the production floor, and reduce the number of canisters taking up space on the floor. Here are some characteristics of certain gases that you may choose to use in a gas cabinet, as well as the types of gas delivery components that work best for safety:

Corrosive gases have the ability to deteriorate or destroy other materials on contact or when there is water present. These gases can also irritate and damage the skin, eyes, lungs or mucous membranes. If an OEM has a working environment where any inorganic materials or water may be able to penetrate the gas cabinet, then the gas delivery system should be equipped with traps and check valves to prevent water and other materials from getting sucked back into any cylinders containing corrosive gas. In addition, the manufacturer should have a safety policy in place that mandates workers to wear protective clothing and equipment when changing out the cylinders, as well as situate an eye and body wash station nearby.

Toxic and poison gases can be non-flammable, flammable, oxidizing, reactive and high pressure. Their toxic nature will be based on the specific gas. During the design of a gas cabinet utilizing one of these gases, one issue that needs to be addressed is potential leaking of toxic gas during change out of the cylinders. Any time there is the toxic gas lurking in the inline, it could potentially leak into the room when a worker opens the cylinder valve. Purge valve systems should be designed into the gas cabinet to remove toxic gas from the piping manifold. You can purge the lines using an inert gas.

Oxidant gases have the ability to combust, but won’t burn as a typical flammable gas. This type of gas can, except for O2 gas, displace the oxygen that is present in the room. Thus, manufacturers should keep all combustible materials away from the cylinders. A gas delivery system can be built fully enclosed with a small access panel where a person can reach inside to control the valves. Oxidant gases should be used with a regulator that is specifically designed and has a label that says it was cleaned for O2 gas service.

Cryogenic gases have temperatures that can reach a boiling point of -130 degrees Fahrenheit. This extreme coldness can significantly deteriorate many materials, making them brittle and increasing the possibility that they crack under high pressures. Blocks in the inline can also cause temperature fluctuation, and an increase of temperature can make the line burst from pressure buildup. A safety relief valve as well as a vent line should be considered when designing a gas cabinet for these gases.

Pyrophoric gases are commonly used in the semiconductor industry. These gases can spontaneously explode or catch fire without the presence of any materials to ignite them. Some pyrophoric gases can also release an abundance of heat energy. A manufacturer must take as many precautions with pyrophoric gases as they would with flammable gases when designing a gas cabinet for these gases. This includes a purge valve, vents, and a flash arrestor for the delivery system.

Choosing Pipes for Your Gas Box

Axenics is always looking for ways to improve your product. Once we receive your design for a gas box, our team might see a better way to utilize pipe bending in the project, to save space, time and money. Here are some questions to ask when deciding on the best type of pipes to install into your gas box:

Is the Material Compatible with Gas?

Certain materials can be negatively impacted by the properties of the gas. The pipe could corrode faster, become brittle and crack apart, or cause contaminants to leak or leach into the gas cylinder.

What Pressure Rating is Required?

Certain pipe and tube material is only rated to withstand specific pressures before experiencing failure. Pipes come with a pressure rating that signifies the amount of pressure they can withstand before bursting or cracking. For example, copper pipe may have a pressure rating of type L, which indicates that they can withstand gas pressures of up to 200 pounds per square inch gauge (PSIG).

How Important is Gas Purity?

For certain applications, such as manufacturing semiconductors or medical devices, the purity of the gas used is essential. The piping needs to have a certain thickness, when the pipe is welded together. One type of pipe material used to ensure high purity gas applications is stainless steel with an electro-polished interior. A manufacturer may also select copper tubing or plastic tubing when they do not want a hard pipe or seams.

How Hot is the Gas?

Some gases may have extreme hot or cold temperatures, such as cryogenic gases that have a boiling point of minus 130 degrees Fahrenheit. These gases can cause the wrong type of pipes to break or burst. The material selected has to withstand extreme temperatures. A manufacturer may also have to select a material that prevents temperature fluctuations, as some gases can spontaneously combust (pyrophoric gases) when there is a change in temperature.

Which Sterilization Method is Best?

Sometimes a pipe must undergo sterilization to remove contaminants and ensure the highest purity gas is being sent through the line. Selecting gas box piping requires understanding how the pipe will react to certain cleaning methods. If a clean in place (CIP) sterilization method is used where chemicals are placed inside the pipe, the pipe materials must be able to withstand the chemicals and not corrode. If a steam in place (SIP) method is used, the pipe material must be able to withstand the steam’s high temperatures.

Axenics’ focus is on the efficiency of your build. Our expertise isn’t the design of someone else’s system. Our prowess is the building of that system, based on your company’s designs submitted to us via drawings. Please contact Axenics with any of your gas cabinet build questions.

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