Helium (He) is the second lightest process gas next to hydrogen. Colorless, odorless, tasteless, nontoxic and chemically inert, helium is nonflammable and, when compared with argon, has a high thermal conductivity. Helium-enhanced mixtures are utilized to create an inert gas shield and prevent oxidation during open arc welding of metals such as aluminum, stainless steel, copper and magnesium alloys. The addition of helium generally increases weld pool fluidity and travel speed. Penetration properties will be broader and travel speed is typically increased with the addition of helium to the shielding gas mixture. Use of helium-enhanced mixtures will also lessen the formation of welding ozone when welding on aluminum alloys.
Pressurized helium is a versatile and essential gas used in numerous industries. Known for its inert properties and low boiling point, pressurized helium is widely employed in fields ranging from healthcare to scientific research. This article will explore the various uses of pressurized helium, its importance in different sectors, and the benefits it offers.
What is pressurized helium?
This refers to helium stored in high-pressure cylinders or containers. Unlike other gases, helium is non-reactive and non-toxic, making it ideal for applications where safety and stability are critical. Pressurization allows it to be stored and transported efficiently, ready for use in a variety of industrial, medical and scientific applications.
Common Uses of Pressurized Helium
- Healthcare and Medical Applications In the medical field, pressurized helium is used in MRI (Magnetic Resonance Imaging) machines to cool superconducting magnets. This process is crucial for maintaining the performance and efficiency of MRI scanners. Additionally, helium is used in respiratory treatments and in the preparation of cryogenic medicines.
- Manufacturing and Welding Pressurized helium is widely used in welding applications, especially in processes like TIG (Tungsten Inert Gas) welding. Due to its inert nature, helium prevents oxidation and contamination, ensuring high-quality welds in metals like aluminum and titanium. It’s also used in other industrial processes that require an inert atmosphere.
- Scientific Research and Space Exploration Helium is an essential component in scientific research, especially in cryogenics, where it’s used to cool instruments and detectors. In space exploration, pressurized helium is used to pressurize fuel tanks and assist in the launch of spacecraft. Its properties make it invaluable in environments that require precise temperature control and stability.
- Leak Detection Pressurized helium is often used for leak detection in high-vacuum systems and large-scale equipment. Due to its small molecular size, helium can easily escape through tiny leaks, making it an excellent tracer gas for finding leaks in critical systems such as high-pressure tanks and pipelines.
- Ballooning and Aerostatic Applications Pressurized helium is also commonly used in filling balloons and blimps. Its low density and non-flammability make it a safer alternative to hydrogen, which was historically used for these purposes. Whether in party balloons or large weather balloons, helium remains the gas of choice for inflation.
Why Pressurized Helium is Important
Its importance lies in its unique properties. As a noble gas, helium is chemically inert, meaning it does not react with most substances. This makes it ideal for environments where reactivity can cause damage, such as in welding, medical equipment, and scientific research. Additionally, helium’s low boiling point of -269°C allows it to be used in cryogenic applications, making it crucial for the cooling of MRI machines and other sensitive equipment.
Benefits of Using Pressurized Helium
- Safety: Helium is non-toxic, non-flammable, and chemically stable, which makes it a safe choice for various industrial and medical applications.
- Efficiency: The high pressure at which helium is stored allows for efficient storage and transport, making it easier for industries to use the gas when needed.
- Versatility: From medical uses to space exploration, pressurized helium’s versatility makes it an invaluable resource across a variety of sectors.
- Cryogenic Capabilities: Helium is essential for maintaining extremely low temperatures, which is particularly important in scientific research and medical imaging.
The Future of Pressurized Helium
As the industry continues to grow, demand for the gas is expected to increase. With the increasing use of helium in advanced technologies, such as quantum computing and medical imaging, suppliers and industries are focusing on sustainable sourcing and efficient use of this precious resource. Additionally, efforts are being made to recycle helium to ensure its availability for future applications.
Conclusion
Pressurized helium is an indispensable gas used in many industries, from healthcare and manufacturing to scientific research and space exploration. Its unique properties, such as inertness, low boiling point, and non-toxicity, make it essential for various critical applications. As demand for helium continues to grow, it remains a vital resource for technological advancements and innovation.
