The tube and pipe production technology area encompasses mills and all of the equipment that makes a mill run successfully: tooling, welding units, nondestructive testers, bundlers, scarfing equipment, straighteners, scrap choppers, and washing systems.
February 10, 2016
Modern, mass-produced tube and pipe products come in three main varieties: extruded, welded, and drawn over mandrel. The standard specifications that apply to the most common type, welded, occasionally come under scrutiny. Are commercial tolerances tight enough? Editor Eric Lundin captured a discussion on this topic at TPA’s 2015 conference, Pipe & Tube Lincoln (Sept. 23, Lincoln, Neb.)
January 19, 2016
Traditional ultrasonic systems use piezoelectric transducers to generate sounds waves and a couplant—a liquid—to provide a pathway for the sound waves to pass from the transducer to the material under test. An electromagnetic acoustic transducer is an alternative technology, one that uses two electromagnets to generate the sound wave in the part to be inspected. This eliminates the couplant, which can interfere with the test process.
September 8, 2015
Although the causes of corrosion have been researched and documented, advanced tools are helping to expand the understanding of corrosion behavior. Magnification by a scanning electron microscope and analysis by energy dispersive spectroscopy are modern tools that help to improve the understanding of corrosion mechanisms.
July 21, 2015
A golf club shaft looks like an ordinary tube, but it’s not. Quite a bit of engineering goes into manufacturing the tube and drawing it so it has the optimal characteristics—lightweight without being flimsy and elastic enough to pack a wallop. Editor Eric Lundin interviewed Scott Cokeing, director of engineering and global quality True Temper Sports, about one of the company’s manufacturing processes, variable wall technology.
June 2, 2015
The adage “two heads are better than one” can be applied to tube and pipe mill monitoring systems. Monitoring the forming process is a good idea, and monitoring the welding process is too, but using a combination system that measures both yields additional benefits.
May 28, 2015
Taking all of the necessary parameters into consideration when designing a tube or pipe mill can be a big task, but it doesn’t have to be overwhelming. The main considerations include all of the cooling system capacity and location, the type of coolant, the filters and skimmers to be used, and local water quality. Making these decisions early, and incorporating them into the mill’s design, maximizes the cooling system’s efficiency.
May 14, 2015
Eddy current and ultrasonic testing are suitable for tube and pipe mills and have been used for weld seam flaw detection for decades, but a new process, thermography, is an alternative. By measuring the heat signature of the weld seam as it cools, it provides information about weld integrity at and below the surface.
May 14, 2015
Roll formers that want to branch out to welded profiles need to know about the main welding processes – GTAW, laser, and induction. This article compares and contrasts each process so roll formers can determine which is best for particular applications.
April 23, 2015
To meet demand from the petroleum industry, spiral pipe producers have turned to advanced automated systems to ramp up production
February 4, 2015
Accurate and reliable length and speed measurements are critical parameters that help tube and pipe producers increase yield, improve quality, and reduce production costs. The relentless improvement in electronic technology, accompanied by falling prices, have made laser-based measurement systems more capable and affordable than ever before.
January 20, 2015
Industry veteran Michael Ferreri provides an overview of the common methods of producing small-diameter stainless steel tubing for medical applications
December 16, 2014
Tube and pipe production is a capital-intensive process, but paying close attention to the efficiency of some of the lowest-cost items, specifically the consumables, can yield big benefits in productivity. At the cutoff, proper blade choice and optimizing the cutting depth are important first steps, but it’s also necessary to diagnose saw problems and—most important of all—develop a blade replacement strategy that minimizes mill downtime.
June 30, 2014
A niche tube producer that formerly used GTAW exclusively, Esta Rohr began changing over to laser welding in 2005. The change is now complete, with substantial changes. The company has reduced its number tube production lines from five to three, but its output has increased tremendously. Meanwhile, laser welding has allowed it to cut some costs, helping its products compete against others.