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What is the best pipe material to use for a compressed air system? Manufacturers have many options when it comes to compressed air piping materials. As with most decisions, the choice in piping materials for sale comes down to tradeoffs between cost, performance, longevity and aesthetics. Here are some of the most common materials used for compressed air piping and the pros and cons of each.
Plastic compressed air piping is cheap, lightweight, easy to install and non-corrosive. However, not all plastics are the same. If you are using plastic piping, it is important to make sure it is durable enough to stand up to years of use and will not be damaged by contact with oils and lubricants from your compressed air system. Most critically, you must make sure that the plastic piping you choose is OSHA-approved for use in compressed air systems.
PVC and CPVC are highly cost-effective and easy to work with. These characteristics have made them very popular for use in plumbing and other applications. Unfortunately, OSHA has banned PVC and CPVC piping for use in compressed air systems.
The reason OSHA does not allow PVC or CPV in compressed air piping is that these plastics are not strong enough to withstand high-pressure applications such as compressed air distribution. In addition, these plastics will degrade when they come in contact with oils and lubricants from the air compressor, leading to fractures and splintering. Over time, this degradation will lead to excessive air leakage and an increased risk of a sudden dangerous rupture. Injuries caused by early installations of PVC and CPVC piping in compressed air systems led to OSHA banning the use of the materials for these applications.
There are several other options when it comes to plastic compressed air piping, including Acrylonitrile butadiene styrene (ABS), polyethylene (PE) and high-density polyethylene (HDPE). These materials retain many of the benefits of PVC and CPVC but are more durable and do not degrade when exposed to oils and lubricants.
On the other hand, even high-quality plastic pipes will not match the strength and durability of a metal compressed air piping system. The cement used for connectors may also be more prone to failure and air leaks than welded metal piping. However, a well-designed plastic system with the right cements can offer similar performance to metal pipes if treated with care.
Piping options made from various types of metal are the more traditional choice for compressed air distribution. Metal pipes are stronger and more resistant to blowouts, cracks and splits. They are not degraded by contact with oils and lubricants. They are also less likely to warp than plastic piping. For these reasons, metal is the most popular choice for compressed air system piping.
Metal pipes are more expensive than plastic and some may take a bit longer to install. But once they are in place, they are likely to last a long time. There are many different types of metal compressed air piping systems to choose from. Each material has its own set of advantages.
Galvanized steel piping has many of the same advantages and disadvantages of its black iron counterpart, with one major exception: galvanization significantly reduces corrosion. This makes it a popular choice for compressed air systems.
If you are using galvanized piping, you should be aware that the galvanized coating will degrade over time. As the zinc coating degrades, it can flake off inside the piping, causing blockages or fouling in the air lines. Sharp flakes are also a safety concern when they are blown out of the air lines at high speeds.
Stainless steel is highly durable and resistant to corrosion, making it the longest-lasting (and most expensive) choice among the steel and iron piping alternatives. Stainless steel piping does not degrade or corrode like black iron or galvanized piping, making it a good choice for applications where it is essential to keep rust and particulates out of the air stream. It also looks great.
However, stainless steel is difficult to cut and work with, requiring specialized installers with the right tools and training for the job. It is just as heavy as traditional iron and also prone to the same leakage around joints and welds. Due to its high cost and other drawbacks, it is one of the least common choices for compressed air system piping.
Copper pipe is another corrosion-free choice for compressed air piping. It is lighter than iron and easier to install than stainless steel. Like iron, copper piping uses readily available fittings and standard joining techniques. The same properties that make copper a popular choice for plumbing make it attractive for use in compressed air systems.
The main drawback of copper is cost. The cost of copper has risen dramatically in recent years, making its use in compressed air system design less appealing. In addition, you will need a skilled plumber or welder to install or make changes to the system.
Modular compressed air piping systems made of aluminum are easy to install and modify. Modern modular piping systems require minimal tools for installation and do not need heavy supports or anchoring. These systems can be installed without threading, brazing or welding, so they do not require a hot work permit. Modifications with these systems are easy, too, and can often be completed in-house without hiring a plumber or subcontractor.
Fluid-Aire Dynamics prefers the Unipipe Modular Aluminum Piping System. This modular aluminum system is lightweight, corrosion-free and very easy to install and modify. The flexible and versatile system offers the widest product range for the transport of compressed air, inert gases and vacuum as well as high-pressure air and fluids. It is available in a broad range of sizes, pressures and fittings. Here are some other advantages of the Unipipe system:
Fluid-Aire Dynamics can help you select, install and maintain your compressed air piping. We can also help you design your piping layout for maximum performance and determine the right size compressed air piping for your needs.
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We discuss the grain-size measurements made during shock compression using in situ x-ray diffraction. Our experiments have shown unambiguously that single-crystal iron shock loaded above 13 GPa along the [100] direction will transform from the ambient α phase (bcc) to a highly ordered polycrystalline ϵ phase (hcp). Here, we present a detailed shape analysis of the diffraction peaks using a modified Warren-Averbach method to quantify the microstructure of shock-compressed high-pressure iron. The ϵ phase was determined through this method to have grain sizes between 2 and 15 nm, in reasonable agreement with results from large-scale molecular-dynamics simulations. We conclude that single-crystal iron becomes nanocrystalline in shock transforming from α to ϵ phase.
Are you looking to choose the best material for a compressed air system pipe? There are many choices for compressed air piping materials. The choice of piping material is a decision that must be made between performance, cost, and aesthetics. Below are the pros and cons of each of these materials.
Plastic compressed air pipe is lightweight, non-corrosive, and easy to install. Plastics come in a variety of shapes and sizes. Plastic piping should be durable enough to withstand years of use. It also needs to resist oils and lubricants that can damage it from the compressed air system. You must ensure that any plastic piping used in compressed air systems is OSHA-approved. OSHA stands for Occupational Safety and Health Administration. Plastic pipes get brittle over time and can crack, break, or even shatter.
PVC and CPVC: These pipes are not OSHA approved forcompressed air systems. PVC and CPVC can be very cost-effective and are easy to use. They are very popular in plumbing and other applications due to these characteristics.OSHA has now banned the use of CPVC and PVC piping in compressed air systems.
Since long, black iron piping has been a standard in compressed air delivery. Black metal piping can be found in older installations. It is strong and durable so it can withstand a lot of abuse. These pipes are made using traditional welding and threading techniques. They can be installed by any plumber who has the appropriate fittings from their local hardware store.
Galvanized steel pipes have many of the same benefits and drawbacks as their black iron counterparts, but one important exception is that galvanization greatly reduces the risk of corrosion. This makes it a popular choice in compressed air systems.
Galvanized piping can degrade over time. The zinc coating can flake inside the piping and cause blockages or fouling of the air lines. Sharp flakes can also pose a safety risk when they are blown from the air lines at high speed.
Stainless steel is the most durable and resistant to corrosion of all the steel and iron pipe alternatives. Stainless steel piping is not susceptible to corrosion like galvanized or black iron piping. This makes it an excellent choice for applications that require the removal of particulates and rust from the airstream. It looks amazing too.
Stainless steel can be difficult to cut and work with. This makes it a challenging material that requires skilled installers who have the right tools and training. It is as heavy as iron and can also leak around joints and welds. It is not a common choice for compressed air system pipes because of its high price and few of these disadvantages.
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