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Monthly Archives: May 2016

Applications And Uses For Helium Beyond Weld Pool Shields

Helium is a popular gas for weld pool shielding, but that’s not the only use you’ll find for it. The gas is valued across many industries for the same reason we love it as a weld shielding tool:

  • It’s inert.
  • It’s colorless.
  • It’s odorless.
  • It’s tasteless.
  • It’s non-toxic.
  • It’s thermally conductive.

Uses For Helium

Helium’s unique characteristics are used in:

  • Technology. Helium is used in the manufacturing of fiber optic cables. The same cables used for Internet and cable connections. It’s also used to manufacture semiconductors for many modern devices like phones, solar panels, and televisions and it is used in gas-filled hard drives. Helium-filled hard drives provide superior storage capacity and use less power than traditional air-filled drives.
  • High-Tech Cleaning. Did you know that NASA uses helium to clean rocket boosters? Since the gas is inert, there’s no chance it will react with other compounds that may linger in the fuel compartments or freeze in the pipes.
  • SCUBA gear. SCUBA oxygen packs aren’t oxygen. They’re actually a mix of oxygen and helium. The helium helps divers breathe easier at high pressure depths.
  • Medical uses. Like SCUBA tanks, oxygen tanks used by patients with emphysema or other breathing problems contain a mix of oxygen and helium. The helium speeds delivery to the lungs. Helium is also used in MRI machines to cool down the super magnets used in the machines and has started to be used in microscopes, providing better resolution than scanning electron microscopes.
  • Transportation. The gas has many uses in the transportation industry, aside from blimps and balloons. It is used to scan for leaks in ships and automobile A/C systems. It is also used in automobile air bags because it can diffuse so quickly upon impact.

Get The Helium You Need For Your Application From Josef Gas

Whatever your application, Josef Gas can deliver the helium you need to get the job done. We can provide pure helium or gas mixtures. Call us at 416.658.1212 to arrange a delivery schedule or to place an order.

4 Reasons Why Industrial Gases Are Often Mixed

Mixed industrial gases are often more expensive than pure concentrations of gas. For that reason, it’s not surprising that businesses looking to contain costs consider switching from a mixed gas to a pure gas, but that response could backfire.

Shielding gases for welding are mixed for a reason – they work better. These two or three-gas mixtures usually contain a mix of argon, carbon dioxide, and/or helium, hydrogen, or nitrogen. Each gas has its own special characteristics; used together, those characteristics work together to enhance or improve the welding process.

 Benefits Of Mixing Industrial Gases

Here are four benefits to mixing industrial gases:

  1. Stability. Argon by itself provides excellent stability and smoothness in arc welding, but used by itself can lead to weld cracking issues. For that reason, it is often mixed with other gases that don’t provide the same level of stability, like helium.
  1. Spray Transfer. CO2 is valued for it’s ready availability, low cost, and ability to produce consistent, good welds. But, it does not support spray transfer well. This lower deposit efficiency can up the final cost of the welded piece. But when CO2 is mixed with other gases, like argon, spray transfer improves and the weld costs remain reasonable.
  1. Cleaning Action. Some of the materials to be welded aren’t very clean, especially if it’s a repair job. They may have scale or oil build-up that require special attention. Argon and CO2 mixtures are more tolerant of this kind of build up, whereas oxygen and argon mixes work better on clean materials.
  1. Helium provides exceptional wetting action, important for welding aluminum, copper alloys, and magnesium, but it does not produce a stable arc. For that, it needs to be mixed with a gas like argon or oxygen.

Get Help Choosing Your Industrial Gases From Josef Gas

The specific combinations and ratios of mixed industrial gases differ depending on the welding need. Ratios influence stability and arc control, wetting action, bead appearance, cutting depth, and even corrosion resistance in some cases. For those reason, you should never select your shielding gas based on cost alone. It’s too important an element in the welding process to be swapped out for the cheapest choice.

If you’re having trouble settling on a gas mixture, contact Josef Gas at 416.658.1212 or info@josefgases.com. We would be happy to help you choose the best mixture of industrial gases for the job at hand.

Safe Storage And Handling Tips For Liquid Oxygen

Although oxygen is a gas, it is most often stored as liquid oxygen because it is less bulky and cheaper to store than its gaseous equivalent. There are several safety considerations associated with liquid oxygen. The gas is stored at extremely cold temperatures, which can burn the skin if it is exposed to the gas. The extreme cold can also damage nearby materials, causing them to become brittle and shatter. Some materials will even combust in the presence of oxygen. These concerns, and more, necessitate safe storage and handling procedures for liquid oxygen.

Storage And Handling Tips For Liquid Oxygen

Transportation: Liquid oxygen containers must be handled carefully. Never roll the container. Always use a cart or dolly to move it and secure the container to the device with a strap to help protect it from falling off. Keep containers upright and properly labeled.

Storage: Oxygen is non-flammable but will react with most organic materials, including those that burn. In fact, oxygen can make materials burn faster and hotter. Proper storage is essential to safety. When storing the material, consider 4 things:

  • Vessels. Oxygen of all kinds must be stored in vessels that are non-reactive with the gas and that have high ignition temperatures.
  • Temperature. Liquid oxygen is so cold that even during the coldest days of winter, the air temperature is much warmer than the oxygen itself. Keeping liquid oxygen insulated from this nearby heat is essential. Containers should be able to withstand temperature and pressure changes and conform to national standards and codes.
  • Location. Keep the containers in a well-ventilated area and protected from weather extremes. Do not store it near any flammable or combustible materials.
  • Pressure Values. Do not tamper with container pressure relief devices, which are designed to control the internal pressure of the container by automatically venting.

Ventilation: Liquid oxygen can cause materials to burn more quickly and ignite faster than they otherwise would. Even something as innocuous as spilling it on clothing can quickly become a disaster. Anything that has been exposed to liquid oxygen should remain in a well-ventilated area, away from any source of ignition, until the excess oxygen has fully evaporated. Smoking should never be permitted near open or closed containers or anywhere it is handled. In areas where liquid oxygen is used, there should be regular air changes – at least 6 per hour to ensure adequate ventilation. Any readings higher than 23.5% oxygen in the atmosphere are too high and considered dangerous by OSHA. Never leave liquid oxygen containers open to the atmosphere.

Count On Josef Gas For Safe Liquid Oxygen Delivery And Handling

Contact Josef Gas for the safe delivery and handling of liquid oxygen to your facility. Our team can even help you configure safe storage and handling procedures to protect your employees and your equipment. Contact us at 416-658-1212 or info@josefgases.com to learn more about our services.

4 Tips On Choosing The Right Welding Wire

Welding wire plays an important role in the strength of MIG welding and, in particular, the strength of the welded joints. While it’s possible to combine any number of different metals or metal alloys with MIG welding, the strength and durability of those welded joints depends on the wire. While the best wire for the job will vary depending on the metals used, there are a few tips to keep in mind when selecting welding wire.

4 Tips To Help Choose Welding Wire

  1. Identify your metals. Even though various metals can be used in MIG welding, the three most common are: carbon steel, stainless steel, and aluminum. These base metals, as they are called, influence the composition and thickness required of the welding wire.
  2. Match your wire. Ideally, the welding wire will be the same type of metal as the metal that is going to be welded. Stainless steel metals should be used with stainless steel wires, carbon steel with carbon steel wires, etc. Keep this in mind and refer to the wire’s primary metal when choosing welding wire.
  3. There’s no need to avoid mixed metals in favour of pure metals. It’s not unusual for MIG wires to include additional elements along with the metal. Elements like manganese, silicon, and titanium are often added to wires to make the welds stronger, more stable, and less porous or prone to oxidation. It’s perfectly ok, and sometimes preferable, to choose a wire that has these additional elements in it.
  4. Pay attention to thickness. The thickness of the base metals determine the thickness of the wire you’ll use. Check the wire thickness charts on wire product packaging to help guide your decision. Keep in mind that there’s a range of thicknesses that will work for standard wire diameters, so you don’t need to know the exact gauge of the plates being welded.

Find The Welding Wire You Need For Your Project At Josef Gas

Josef Gas is the only source you need for welding. We carry welding equipment, welding gas, and filler materials like welding wire to complete any project. You’ll find all the top brands like Lincoln, ESAB, Avesta, and Harris in one spot! Visit our Welding Equipment page to see what we have in stock or contact us at 416.658.1212 or info@josefgases.com to discuss your project needs today!

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