Red-D-Arc Welderentals and Air Liquide Denmark have teamed up to provide welding equipment and gases for a large tunnel project connecting Denmark and Germany. Equipment will be available at the Bredgaard Boats shipyard in Denmark which is adjacent to the north end of the tunnel. (more…)
Wisconsin Manufacturer Stays Productive With Rapid Paint Booth Cleanup
Red-D-Arc’s Dry Ice Blasting Specialists are industry-renowned for delivering solutions centered around cleaning and performance maintenance, particularly in commercial/industrial paint operations where dry ice blasting often proves superior to conventional hand scraping or chemical methods for the removal of overspray deposits.
Here is one such example.
Project Scope and Development
A Wisconsin-based manufacturing company contacted Red-D-Arc inquiring about the feasibility of dry ice blasting for their paint operation. The process was to be part of a deep clean for one of the client’s paint booths with the goal of removing heavy overspray from walls, floors, windows, lighting covers, fixtures, and sprayers. Once the deposits were removed, the bare surfaces would undergo a protective clear coat application and the booth would then be returned to production.
Red-D-Arc’s Dry Ice Blasting Specialists were instrumental in reviewing the application, evaluating onsite compressed air requirements, and calculating removal rates and ice consumption estimates. They provided the client with a “clear picture” of the job scope, and they tailored a turnkey rental package specific to the customer’s environment and painting operation. (more…)
This article originally appeared in Connector Magazine, Fall 2020 Edition
Erectors can save cost and time by taking this welding technique in-house
Large steel erection projects commonly require heat treatment for welding because of the thick materials used in structural steel construction. Proper implementation is critical; so often this work is outsourced. The perceived level of expertise to perform this work can make the prospect of using in-house personnel daunting. However, most welding contractors are actually fully capable of performing on-site heat treatment operations.
The two primary methods for heat treating metal are preheating and post-weld heat treatment (PWHT). Preheating is the process of heating the base metal to a specific temperature prior to welding to minimize the temperature difference between the welding arc and the base metal. This process helps to reduce internal stresses that occur as substantial temperature differences between the weld and the base metal normalize, which can cause cracking and distortion. Slowing the cooling rate also allows hydrogen to escape from the weld, which minimizes the potential for cracking.
Dear Valued Red-D-Arc Customer:
As we all continue to adjust to the global COVID-19 pandemic, we would like to take a moment to reach out to you to inform you that Red-D-Arc is continuing to vigilantly monitor the evolving developments and adjusting as necessary in order to safeguard our workforce and limit any potential impacts or disruptions to our commercial relationships.
At this time, Red-D-Arc operations are currently proceeding as usual, to the extent permitted by relevant governmental and federal authorities. While we are aware that various government-imposed shutdowns have been implemented for various industries in certain geographic locations, Red-D-Arc – like its parent company, Airgas – identifies itself as a business which provides essential services, including the supply of necessary equipment to various power plants, oil refineries, the petrochemical industry, government-led construction projects, and so forth.
We are currently offering a number of pre-owned welding equipment for sale throughout our UK, EU and Middle East Locations.
Contact Your Nearest Red-D-Arc location for details and shipping.
Disaster Remediation for Fire-Damaged Property
Red-D-Arc provided high pressure 200 psi/375CFM compressors, dry ice cleaning machines, ice, and on-site operator/safety training to labor crews in a time-constrained situation as part of emergency management and response effort to address a university garage fire disaster in Houston.
The dry ice cleaning process was used to clean up soot and carbon contaminated surfaces bringing it back to pre-disaster condition. Through the expert support of Red-D-Arc’s Dry Ice Blasting Team the customer was able to compress cleaning time-frames and complete the project in less than a week enabling the critical service delivery infrastructure to get back to the educational community in a short period of time.
To begin with, they have different colored bands that are used to identify them. However, there are several other important differences to consider when selecting a tungsten. Here some of the various types with the respective characteristics:
EWTh-2: 2% thoriated tungsten. EWTh-2 is color-coded with a red band. It is known for its durability, ability to withstand high currents, and excellent arc starts. It is primarily welded using a negative polarity and direct current. It does not have great characteristics when welding with AC.
EWLa-2: 2% lanthanated tungsten. EWLa-2 is color-coded with a blue band. It is known for its excellent arc starting ability, excellent current carrying ability, and can withstand many arc cycles. It can be welded as the negative electrode using direct current or with alternating current.EWP: Pure tungsten electrode. EWP is color-coded with a green band. It has excellent arc stability. It is almost exclusively used with alternating current. Tungsten emission is more likely with a pure tungsten electrode when compared with other alloyed tungsten electrodes.
EWCe-2: 2% ceriated tungsten. EWCe-2 is currently color-coded with a gray band, although in the past it was color-coded with an orange band. It is quite similar to EWLa-2 in that it has excellent current carrying ability, excellent arc starting ability, and can last through many different arc start and arc termination cycles.
How do I prevent wire feeding issues when using the MIG welding (GMAW) or flux-cored arc welding (FCAW) process?
Wire feeding issues can be caused by a variety of circumstances. Some of the most common reasons for wire feeding issues include:
- Drive roll tension: The drive rolls that push or pull the wire through the system have a tension that is either too great or too little. Adjust the spring pressure until tension is appropriate.
- Drive roll size: The drive rolls may be the wrong size. For instance, if 1.3 mm drive rolls are being used to move 0.9 mm wire, slipping will most likely occur.
- Drive roll type: Some wire require specific kinds of grooves for optimal feeding. Flux-cored and metal-cored arc welding wires typically require V-groove drive rolls that are knurled. Aluminum wires require a smooth U-shaped groove.
- Drive roll condition: Worn drive rolls will be ineffective at moving wire through the system.
- Liner size: If a liner is too small for the wire it will not feed. If the liner is too big, the wire may have too much freedom to twist inside of it, causing an unpredictable feed.
- Liner type: For most wires, steel liners work excellent. However, some wires, such as aluminum, require a nylon liner to help ensure proper feeding.
- Liner condition: A worn liner will be detrimental to wire feeding. Replace the liner if it is worn or damaged.
- Contact tip size: A proper contact tip size should be used. If the tip is too small, the wire will not feed; if the tip is too large, wire feeding and electrical conductivity may be negatively affected.
- Wire condition: Not all wire manufacturers put out the same quality product. Some wires may have thin and thick spots as well as lubricants that can cause poor wire feeding.
When MIG welding was first invented, it used a constant voltage source of electricity for the arc. While this method is still used today, the invention of pulsed MIG welding has allowed welders to realize several advantages over conventional MIG welding, several are listed below:
- Pulsed MIG can be used to weld thin materials. Conventional MIG welding runs at a constant amperage whereas pulsed MIG welding runs a peak and background amperage. The constant switching between these two amperages enables pulsed MIG welding to put out a lower overall heat input into the material. This helps prevent blowouts on thin materials.
- Pulsed MIG has less spatter than conventional MIG welding. Pulsed MIG welding uses a peak electrical currents to cleanly burn the wire off at a high amperage. Pulsed MIG welding also employs a lower background welding amperage immediately after the peak electrical current to prevent the interaction of the electrical arc and the wire from becoming unstable. This ultimately results in a reduced amount of spatter.
- Pulsed MIG welding is excellent for out of position welding. At the same voltage and wire feed settings, conventional MIG tends to have a weld puddle that is larger and more fluid than that of pulsed MIG. Pulsed MIG has more controllable puddle that prevents it from falling out when gravity is a concern during out of position welding. Furthermore, the reduced amount of spatter than can be achieved with pulsed MIG makes it safer for the welder to perform the out of position operation.
We are pleased to announce that we have added Abicor-Binzel Fume Extractor MIG Torches to our equipment rental fleet.
These portable, compact and powerful high-vacuum extraction units FES-200 & FES-200 W3 capture welding fumes directly at the source, protecting both the welder and the environment from harmful particles.
The machines come with an auto start-stop function so that the fume extractor is activated only when welding is in progress. Welding becomes safer, energy consumption is reduced and unecessary noise levels are eliminated.
You can rent these fume extractor welding torches from red-d-arc.uk