As a custom equipment designer, T&H Lemont does much more than design and build mills for making tube and pipe. It creates opportunities for manufacturers of tube and pipe. Opportunities to invest in custom-made mills that have more capability, more capacity, and more versatility, mill that provide more productivity and ultimately more profit. It’s not enough to purchase an off-the-shelf mill designed for run-of-the-mill applications. T&H Lemont listens to its customers, learns about their needs, and designs mill to suit their specific applications.
So if you need ERW, plasma, or laser welding; if you run unusually high-strength materials; if you make very thin- or thick-walled products; if you’re interested in making cut-to-length or coiled tube; T&H Lemont can develop a solution for you. If you’re in exotic metals such as brass, copper, platinum, titanium or even gold; if you need to make small-diameter tubing for medical or automotive, pipe for fences or sprinkler systems, or large diameter mechanical or structural pipe; or if you’re making a middle-of-the-road product in a common diameter and wall thickness, T&H Lemont is your most dependable and knowledgeable full-service source for mills and peripherals.
As a single-source supplier, T&H Lemont is a sole point of responsibility in the engineering, building, delivering, and commissioning a full selection of mill systems and configurations. Encompassing a complete range of services from engineering to installation to personnel training, the T&H Lemont name is a guarantee that your mill will be everything you need. And all are designed and built to place you firmly at the competitive forefront with higher yields and minimal changeover times. Automated functions synchronized to the mill speed. Electronics precisely tuned to your production needs. Cutoff equipment designed and built to maximize end quality. Self-lubricating gear boxes for maintenance-free operation. Housings precision machined for accurate, permanent gear alignment. And ambidextrous, single point adjustments for easier operation. Even small yet critical details like extra wide, slanted bases that provide extra working space, reducing worker fatigue and making maintenance easier.
T&H Lemont understands the need for absolute control of your mill to ensure consistent and uncompromised quality of your product, which is the foundation on which you stake your reputation and the same on which we build ours. It is this focus on the products you wish to make that drives our engineering team to develop new technological achievements, coupled with the vast resources of the Inductotherm group of companies, that places T&H Lemont head and shoulders above other manufacturers.
Staying at the forefront, and exceeding customer expectations, were the two main pillars that supported T&H Lemont’s vision in it early days. Still, the T&H Lemont team knows that we can’t rest on our laurels. We approach each project knowing that what we did on the last project is just history, and that what we’ll do for you tomorrow will be a part of your future and our legacy.
Induction Welding Mill Systems
Mills that use induction welding—specifically, high-frequency electric resistance welding, or HF ERW—are the workhorses of the tube and pipe industry. They also are the hallmark of the T&H Lemont product line. When outfitted with a precise, high-speed cutoff, this variety of mill can turn out carbon steel tube or pipe at 1,000 feet per minute. The input, whether carbon steel, stainless steel, or high-strength, low-alloy (HSLA) steels, is often measured in hundreds of thousands of tons annually. The output? Millions upon millions of feet of robust, defect-free tubular product every year.
One mill in particular, our dual-capacity mill, is a pioneering concept in mill construction. Model WU-20/WU-40 combines the strengths and capabilities of two mill systems into one high-speed production line. With minimal downtime, exact precision, and the ability to produce diameters from 0.5 to 6.625 in. OD, it enables record production runs. Ideal for many applications, this mill is preferred for manufacturers of hydroformed tubing, sprinkler pipe, conduit, and mechanical and structural tubing, spanning varied disciplines that many manufacturers seek for capability, broader market appeal, and higher profits.
TIG, Plasma, and Laser Systems
The raw material for a mill can be stainless steel, copper, brass, platinum, titanium, and even gold. For many such metals, induction welding is not the answer. Not to worry, though—T&H Lemont excels in building mills for other welding processes, including TIG, plasma, and laser.
One of the oldest welding processes, TIG uses a tungsten electrode and a cloud of inert gas that protects the metal from oxidation while it’s red-hot. Depending on the application, TIG often provides the best combination of heat penetration and welding speed.
For additional heat, a multicathode TIG system provides up to three simultaneous, constant, controlled arcs. Air-driven jaw assemblies deliver near-zero distortion in end cuts, managed and monitored with multi-section digital electronic controls. Our unique sequential welding configuration means increased mill throughput and performance by combining a power source with a high-frequency arc that initiates the weld and shielding gas flow, all aimed at optimum consistency and integrity of the seam. An inline bright annealing system can be built into the system to essentially eliminate any potential contamination of the weld seam.
Plasma is a step up from TIG. It provides a more stable and concentrated arc than TIG, with an energy density about 3 times that of TIG. The higher density means that higher mills speeds are possible. It also translates to a narrower heat-affected zone, improving the weld’s quality. Like a TIG mill, a plasma mill can use one or several cathodes to increase the total amount of heat delivered. Finally, because the electrode in a plasma system is protected by a copper sleeve, it can run longer between electrode changes, reducing downtime.
As much as plasma is an improvement over TIG, laser welding represents another step up the technological ladder. The laser spot size is tiny, meaning that the heat is concentrated much more than that of even a plasma system. The outcome is similar, but the magnitude is greater—concentrating more heat in a smaller area results in less weld seam distortion.
|Model||Welding Process||O.D. Range (In.)||W.T. Range (In.)||OD Range (mm)||W.T. Range (mm)||Material||Shapes|
|WU-11M||Induction, Laser, TIG||0.250–1.000||0.020 – 0.065||9.5–25||0.5–1.6||Ferrous, Nonferrous||Round|
|WU-15||Induction, Laser, TIG, Multicathode||0.375–1.750||0.020 – 0.083||9.5–44.5||0.5–2.1||Ferrous, Nonferrous||Round, Shapes|
|WU-20||Induction, Laser, TIG, Multicathode||0.500–2.500||0.020–0.134||12.7–63.5||0.5–2.5||Ferrous, Nonferrous||Round, Shapes|
|WU-20H||Induction, Laser, TIG, Multicathode||0.625–2.500||0.025–0.125||15–65||0.6–3.0||Ferrous, Nonferrous||Round, Shapes|
|WU-25||Induction, Laser, TIG, Plasma, Multicathode||0.750–3.500||0.020–0.160||19–88.9||0.6–4.1||Ferrous, Nonferrous||Round, Shapes|
|WU-35||Induction, Laser, TIG, Plasma, Multicathode||1.000–4.500||0.060–0.250||25.4–114.3||1.5–6.4||Ferrous, Nonferrous||Round, Shapes|
|WU-40||Induction, Laser, TIG, Plasma, Multicathode||1.500–5.500||0.060–0.280||38–140||1.5–7.0||Ferrous, Nonferrous||Round, Shapes|
|WU-50||Induction, Laser, TIG, Plasma, Multicathode||2.000–8.625||0.110–0.375||50.8–220||2.8–9.5||Ferrous, Nonferrous||Round, Shapes|
|WU-60||Induction, Laser, TIG, Plasma, Multicathode||2.000–8.625||0.110–0.375||50.8–220||2.8–9.5||Ferrous, Nonferrous||Round, Shapes|
|WU-70||Induction, Laser, TIG, Plasma, Multicathode||3.000–10.750||0.120–0.500||76.2–273.1||3.0–12.7||Ferrous, Nonferrous||Round, Shapes|