Articles

Oxyfuel Brazing Primer

Oxyfuel brazing is a simple yet effective method for joining metal that produces sound, leakproof connections. Harris technical director Robert Henson and manager of special products David Gailey discuss the common brazing alloys, base metal and fitting preparation requirements, and potential pitfalls you could encounter in this popular process to ensure optimal results.



Silver's Role in Phos-Copper Brazing Filler Metals

Probably the most widely used brazing filler metal is an alloy of copper and phosphorus, often with silver added as a third element. The role of silver in these alloys is often misunderstood.



Harris sets itself apart

During an Electra Mining visit to South Africa, David Nangle, the president and CEO of The Harris Products Group, presented the success of the company's new multiple channel distribution strategy, African Fusion reports.



Turn up the Brazing Heat

When brazing and soldering, most HVACR technicians routinely use manual torches as their heat source. For brazing there are generally two equipment options to choose from: oxygen/acetylene or air/acetylene. While alternate fuel gases are available, most contractors still use acetylene. The equipment features and benefits of each type will be the focus in this article.



Dynaflow vs. Silver

A short time ago world silver market prices reached levels not seen since the 1980’s. While prices have abated somewhat, they remain plateaued above $30.00 per troy ounce. The price of silver containing brazing filler metals reflect the high price at which silver is traded around the world.



Oxy-Hydrogen

As you know when it comes to oxy-fuel applications the "Holy Grail" is Hydrogen. The burning of H2 and O2 results in only two by-products - energy release in the form of heat and plain old pure water - H2O.



The What, Where, and When of Hose Type Flashback Arrestors

Flashback arrestors and check valves are safety devices designed for oxy-fuel systems to prevent or control damage from an occurrence like a flashback. They are used to prevent damage to equipment, but more importantly, to prevent personal injury.



Station Yourself Properly

Learn about the differences between "Station" and "Pipeline" regulators.



Know Your Limitations

It is vitally important that you always use the appropriate equipment for the job. Not only does the job have to be done properly, but you have to keep safety in mind as well.



Cost Reduction Strategies with Today’s Silver Prices

World silver market prices have reached a level not seen since 1980. Since most braze alloys contain silver their price reflects the market rise. This has rekindled an interest in ways to reduce braze product cost. Here are several strategies that can help lower cost and often improve efficiency.



Aluminum Regulator Fires

Over the years, fires involving oxygen regulators have been a thorn in the flesh for regulator designers and systems engineers. An oxygen fire is extremely violent and too many times leads to serious injury and even death. Currently, the FDA, ASTM and UL are all in a mad dash to see who can prohibit the use of aluminum as a material in these regulators first. Are these agencies jumping the gun? To answer this question, let’s first look at the problem.



Flashback Arrestors

The safety equipment industry in the U.S. has flourished for the last several years as manufacturers have increased efforts to promote safety awareness and education for end-users. As part of that, manufacturers of oxy-fuel cutting and heating apparatus have also been successful in raising awareness of safety issues related to their equipment. This is a positive trend that should continue. However, even safety equipment, if used improperly, can create hazardous conditions, which increase the risk of accidents and/or injury.



Gases, Regulators & Motorsports

The motorsports industry is one of the most highly competitive in the world today. Racing teams are always on the look for even the slightest advantage over other teams. With this highly competitive market, comes a tremendous opportunity for gas distributors and equipment manufacturers to aid in the development of new products and/or processes to make cars go faster and pit stops go smoother.



Regulator Life Expectancy

Compressed gas regulators, when not performing optimally, can lead to many hazardous situations, such as the leakage of toxic, pyrophoric or asphyxiant gases into the atmosphere, or even the risk of explosions or fire. As such, regulators are devices that should only be used by persons experienced and aware of the inherent dangers.



Lessons Learned In Reducing Shielding Gas Costs

Facing the harsh realities of our current economy can be challenging. Working in an industry where every penny counts, it is extremely important for managers, engineers and welders to examine all processes to determine where potential cost savings are and implement necessary changes as quickly as possible. Looking at the gas equipment side of welding applications can yield some significant cost savings with very little investment. Furthermore, making a careful analysis of shielding gas equipment can yield some great rewards.



CO2 Freeze Up

Under certain condition, users of carbon dioxide gas (from high pressure cylinders), experience "freeze-up" problems on valves, regulators and other compressed gas equipment. The term, "freeze up", refers to a pressure regulator becoming clogged with dry ice snow or crystals, which restrict the flow of gas through the regulator or other pressure control valve. The following explains this phenomenon in an effort to help users avoid problems in CO2 distribution systems.



Brazing R410A Systems

From the RSES Journal: The higher working pressures and hydroscopic nature of lubricants associated with R-410A systems means keeping moisture out is a must.



Selling Specialty Gas Equipment

A seasoned veteran in the specialty gases industry once said, “A specialty gas can be defined as any gas that has a value-added element.” I have always thought that definition true, because the compressed gas industry caters to extremely diverse and wide-ranging applications on a global scale.