Here you will find the latest Red-D-Arc company news, such as branch openings and acquisitions along with information about our latest product and service offerings, industry related news, events, tradeshows and conferences.
Are you looking for the best rates on portable welder rentals? We can fulfill your welding equipment needs. At Red-d-Arc, we offer you a wide variety of welding equipment for almost every purpose. We provide customized recommendations on each piece of equipment that we rent out.
If you are looking for a great deal on a mig welder rental, check out our selection. Metal inert gas (MIG) welder models are great for welding indoors or in enclosed spaces. These machines use flux core wire that makes them the perfect option when welding tears or breaks on farm equipment.
However, MIG welders have plenty of other uses that make them perfect for a wide variety of other types of equipment. Keep in mind, however, that you do need a particular set of controlled conditions in order to obtain the best possible results.
We carry a variety of models, including the following:
Pre-weld and post-weld heat treating is critical for many welding operations. Without proper thermal manipulation, welds and heat affected zones can have mechanical properties that are undesirable. Worse yet, inadequate heat treatment can result in cracks and devastating weld failures. While temperature and time are the primary concerns when heat treating a weld, the heating method should also be considered diligently when selecting a process. Induction heating is one of the most popular types of heat treating methods, and rightfully so. The benefits of induction heating are many, and Red-D-Arc has the equipment you need to successfully implement an induction heat treating operation for your projects.
What is Induction Heating?
Induction heating is a heat treating process that, when used properly, can alter the mechanical properties of a weld and its adjacent base metal in a way that meets the demands of the application in which the weld is being used. Induction heating relies on the science of electromagnetism to heat the part. Induction coils are placed around the material being heat treated, and alternating current is fed through them. This alternating current going through the induction coils creates a rapidly alternating magnetic field.
The eddy currents that occur as a result of this heat the material surrounded by the coils. Magnetic materials are even more easily heated by the alternating magnetic fields.
Induction Heating Equipment
Setups for weld induction heat treating can vary somewhat from application to application, but Red-D-Arc has the equipment needed for most common scenarios. Every induction heating system requires a power source. The power source converts electricity from a power grid into an electrical current that can be used to energize another critical piece of equipment in an induction heating setup: the induction coils. Induction coils are typically made out of copper and are not required to be in contact the workpiece. The power source and the induction coils are the two main components of an induction system, although other pieces of equipment such as blankets can be used to shield the induction coils and aid the heating process.
Why Use Induction Heating Over Other Heating Processes?
Induction heating has many benefits over other processes. Torch heating operations do not have the accuracy of induction heating methods. The flame heats the workpiece in an extremely varied way. Also, a torch heating operation must start with its heating on the outside and let the temperature “soak” its way into the part. Induction heating can use a variety of electrical frequencies to adjust the initial heating position within the depth of the material to some extent. Additionally, the width and length of the heated material can be adjusted precisely with induction heating, unlike torch heating.
Torch heating requires the use of combustible gases, which can be dangerous. Volatile gases can explode and cause injury to workers and destruction of property. These combustible gases also release hazardous fumes that may require respiration or fume removal, especially in confined spaces. On the other hand, induction heating, when used properly, releases no harmful fumes. Since combustible gases are not used during induction heating, there is no risk of explosion.
Another common heat treating process is furnace heating using electrical resistors as heating coils. This process can take a very long time for thick parts, and, similar to torch heat treating, works by heating the exterior surfaces of a base material first and allowing the temperature to soak into the core. Conversely, induction heat treating can be performed rapidly, potentially shaving many minutes off of a resistance furnace operation. The core can be heated much quicker as well with induction heating. Induction coils used with a piece of equipment such as the Miller ProHeat 35 are much more portable than furnace operations as well, allowing for far more practical use in the field.
While there are many advantages to induction heating and induction heat treating, there are some disadvantages. One disadvantage is part geometry. Unless an induction furnace is being used, parts will simpler geometries such as pipe or plate are more readily induction heat treated than ones with more complex geometries simply because the induction coils must be placed around the part.
Another disadvantage is that the initial cost of an induction heating system is typically more expensive than a torch heating system. However, this is where Red-D-Arc has you covered. With our induction heat equipment rentals, you can see firsthand the benefits of induction heating without large capital investment so you can keep on welding!
In industry, a growing trend is the idea to use orbital welding as a solution to the mounting problem of welder shortages. It is a well-known fact there are just not enough pipeline welders to go around (no pun intended). By 2020, the American Welding Society expects the U.S. will face a shortage of 290,000 welders. Companies in other business sectors — from food service companies to banks — attempt to solve labor issues and increase efficiencies by utilizing automation to replace workers. Is automation, specifically orbital welding in this case, the way to improve operating factors and productivity?
The first part of improving welding operations is not to look at the welding process but instead examine its upstream aspect at material input. Material fit-up is the first key to improving quality and productivity. Poor fit-up causes overwelding and often leads to weld quality issues. A fillet weld that requires a quarter-inch weld has an unintentional root opening or misalignment of 1/16 inches. It then requires a 5/16-inch weld, which in turn increases weld joint volume by 57 percent. This result means 57-percent more wire, 57-percent more gas, 57-percent more use of consumables and — the most costly issue — 57-percent more time to weld that joint.
Let’s say that same 5/16-inch weld is then welded within tolerances, but the weld size is overwelded by 1/16 inch. That 5/16-inch weld then becomes a 3/8-inch one due to the compounding factors of material fit-up and a very common practice of overwelding. This weld that could have been done to code and adheres to a welding procedure is now 100-per-cent more costly then intended.
Are you buying double the gas and wire you need? Eighty-percent of most welding operating expenses are in labor. What are you paying to have someone weld 100-percent more than what is needed?
What is paramount is we can create precision fit-up and limit overwelding with the use of end-prep and orbital welding. Regardless of welder skill or the type of welding equipment, starting a weld with poor fit-up will result in a weld that costs more to produce. The conversation about quality, productivity and efficiency should not start at orbital welding or about your welder’s skills but should instead begin at end-prep. End-prep equipment, simple to operate and often overlooked because of its necessity, offers machine shop-like precision and fit-up while in the field. With the unfortunate skill gap widening in the trades, it is imperative to start your pipe or tube welding with precise fit-up, as those who can make passable welds become fewer and fewer.
We aren’t replacing welders with automation; we are making them more efficient. The goal is to take the welder you have and select the proper end-prep and orbital welding process for your job so you can possibly create twice as much time for him or her and improve quality along the way.
In order to meet the rising challenge of the lack of qualified welders, we need owners and management as well as welders to come together to increase quality and productivity. Management needs to provide welders with good material and proper equipment to work with, and the welder needs to realize we aren’t attempting to take his or her job but instead attempting to give him or her the best tools to get the best result.
When you look for a company to fulfill your business’ welding needs, you should search out a supplier that offers more than just equipment. Find a supplier that offers not just a few options of welders but solutions.
For more information, visit www.red-d-arc.com, call (866) 733-3272 or email Brian Imhulse at Brian.Imhulse@airgas.com.
Most people who have been in a technical profession know the constant need for a variety of tools. One minute you may need a pliers, then a knife, then a file, then a screwdriver, and once the day is all done, a bottle opener. This is the reason why multi-tools have become so popular; they combine all of these tools into one. In the world of welding, there is something similar to a multi-tool. It is known as a multi-process welder. Red-D-Arc carries multi-process welders because we know that one minute you might be self-shielded flux core welding some dirty, ½” thick steel and then the next minute be fitting up 18 gauge aluminum that you need to gas tungsten arc weld.
Red-D-Arc provides a wide variety of multi-process power sources to suit many customer needs. The Miller XMT is a type of multi-process welder that Red-D-Arc carries. All XMT variations provide the capability to MIG, TIG, flux core, and stick weld. The Field Pro series also possesses Miller’s proprietary pulse waveform known as Regulated Metal Deposition (RMD).
This is a pulsed short arc MIG welding process that is excellent at bridging wide gaps that can result from poor fit-up.
Red-D-Arc is aware that multi-process welders aren’t always operated in ideal conditions. Extreme heat and environments with high amounts of dust can destroy welding power sources. That is why Red-D-Arc provides the EX360. The “EX” is for extreme, because this power source can handle extreme conditions. If protection from dust and heat are a concern while using multiple welding processes, the EX360 may be your solution. The EX360, as well as several other multi-process welders offered by Red-D-Arc, are available in four-pack and six-pack configurations to enable increased productivity.
Submerged arc welding is an excellent process to achieve high deposition rates, and Red-D-Arc has them. However, some applications require additional welding processes besides just submerged arc welding. When this is the case, Red-D-Arc also has multi-process submerged arc welding machines. The DC1000, for instance, provides end users with the ability to not only submerged arc weld, but also provides stick, MIG, and flux cored arc welding capabilities.
Stainless steel contains a minimum of 10.5% chromium which imparts it corrosion resistance by forming an oxide layer on the surface. The most common stainless steel is the austenitic type (300 series) which contains chromium and nickel as alloying elements. Other types include ferritic, martensitic and duplex stainless steels. Most stainless steels are considered to have good weldability characteristics. Most common processes used for welding stainless steel are TIG (GTAW) and MIG (GMAW). But, stick welding (SMAW) is also utilized.
Differences in Properties:
The properties of stainless steel differ from mild steel, and these differences need consideration when welding as below:
Higher coefficient of expansion, 50% more for austenitic – this results in more distortion
Lower coefficient of heat transfer – welding requires lower heat input as it is conducted away slowly
Lower electrical conductivity – using the correct and consistent stick-out distance is more critical when using MIG/TIG, higher wire speed for the same current is required when MIG welding
Why segregated work area?
Welding of stainless steel is carried out in a work area segregated from carbon steels. Moreover, tools dedicated for use with stainless steel must not be used to work on carbon steels. These tools include brushes, hammers, clamps, grinders etc. The segregation of work area and tools safeguard the contamination from carbon steels, which may cause welding defects and corrosion (rust) on stainless steel. You must also wear gloves when working with stainless steel as this will prevent oil from the hands passed onto the stainless steel.
Preparation is key!
With stainless steel, it is important that the joint surfaces are thoroughly cleaned before welding to remove any dirt, grease, oil etc. The filler wire also needs to be completely clean.
Additionally, the joint design including the joint gap must cater to the higher expansion rate of stainless steels.
Filler Material Selection:
Filler materials used generally are the same as the base metal. Special considerations are required to select a filler material if welding dissimilar stainless steels or stainless steels where no identical filler material exists. Furthermore, filler materials are selected to reduce the risk of intergranular corrosion and hot cracking.
It is essential to protect the weld during welding using a mainly inert gas. Additionally, the weld root needs to be purged using a pure inert gas.
When welding austenitic stainless steels, it is important to restrict the heat input to a level which is just sufficient to ensure a good weld. The interpass temperature is limited to 350 F. Preheating is not carried out on austenitic stainless steels. Very low carbon grades (suffixed with L e.g. 304L, 316L) are used to prevent the formation of chromium carbides in the heat affected zones which causes intergranular corrosion.
Martensitic stainless steels are generally used as wear resistant materials in overlaying applications. To avoid cracking, accurate preheat needs to be applied and a minimum interpass temperature maintained.
Ferritic stainless steels are used mostly in automotive applications. The heat input in these steels during welding needs to be limited, and a maximum interpass temperature of 300 F is recommended. This will ensure that the grain growth in the material is controlled and the strength is maintained.
With duplex stainless steels, the heat input also needs to be restricted.
Cleaning and Passivation:
Stainless steel welds must be cleaned and passivated after completion to ensure corrosion resistance and good appearance. This is performed manually by mechanical (brushing, grinding, blasting), chemical (applying pickling agents and other chemicals) or electrochemical means.
Red-D-Arc has a wide range of equipment suitable for stainless steel welding for rent including the following:
Multi process welders capable of stick, TIG, MIG, submerged arc, air carbon arc cutting, flux core, up to 1500 A
A Red-D-Arc customer recently won a large naval defense contract that would require a substantial amount of hard automation equipment. This shipbuilding company was able to leverage Red-D-Arc’s Welderlogistics Lease program to acquire new weld automation equipment for the duration of the defense contract. With the help of over 200 pieces of leased equipment now in their fleet, this customer has grown their business considerably, and without the need for large capital expenditure.
Leasing equipment has many advantages for organizations that want to expand their business by bidding on large contracts, without the risk of tying up capital in depreciating equipment. All leased equipment comes with a full factory warranty for the duration of the contract and will be repaired or replaced without charge in the event of breakdown.
Red-D-Arc was featured in the December/January issue of Tank Storage Magazine in an editorial titled “Rental welding equipment for storage tank fabricators”. Tank Storage Magazine is an industry leading publication, reporting exclusively on the bulk liquid tank storage and terminal sector.
The storage tank construction industry is highly competitive and fabricators gain a significant advantage by leveraging Red-D-Arc’s rental fleet of automatic tank welding equipment. Red-D-Arc supplies specialized automatic storage tank welding equipment to companies in the tank fabrication industry for projects all over the world.
Along with our specialized tank welding equipment comes a highly knowledgeable and experienced team of Red-D-Arc technicians. Sayer Hendricks – storage tank welding equipment specialist at Red-D-Arc is quoted in the article: “A fabrication company without prior knowledge of the equipment, is able to rent a turn-key tank welding automation system and increase their welding productivity by 40-50%. With on-site training, service and support, our customers are up and running quickly and making 100% x-ray quality welds without fail”
Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.