November 21, 2016 | By Chiranjib K. Mukherjee
Tube producers and fabricators make and use tubing that conforms to a particular manufacturing standard, but few standards specify grain size. Knowing the role that grain size plays is a crucial first step in understanding how a fabrication process succeeds or fails.
October 26, 2016 | By Martin Tellez
Environmental concerns and the associated legislation have put quite a bit of focus on volatile organic compounds and solvent-based coatings. Water-based coatings are making substantial headway in providing viable alternatives that perform well.
October 26, 2016 | By Z. Kent Li
The staff at TMK-IPSCO instituted a study of OCTG products using finite element analysis. The purpose was to study and analyze forming behavior as the material progressed through the mill, with an additional benefit of evaluating the load at each mill stand to improve the mill performance and tube quality.
October 25, 2016 | By Rick Jackson
Laser cutting machines brought a big leap in productivity to the metalworking market when they were introduced, providing holemaking, cutting, coping, and other capabilities on a single machine. However, this isn’t the only factor in a laser machine’s productivity. The time it takes to load and unload material has a big effect on cycle times and warrants close attention to maximize the machine’s output.
October 24, 2016 | By Eric Lundin
Tube production is always a matter of juggling a great number of balls at once and dealing with relentless competitive pressure. For companies that provide tube for automotive applications, the risk of a recall is an additional burden. Longtime auto industry supplier Middletown Tube Works found a diagnostic tool that assists its eddy current system in evaluating the tube production process.
August 29, 2016 | By Eric Lundin
James Steel & Tube isn’t the biggest, most high-profile tube producer, but because it is a small company, it is extremely versatile. It has gone through several transformations since it was founded in 1961, and under the guidance of current president Jim Petkus, it is going through another transition.
July 7, 2016 | By Eric Lundin
Fabricator and bridge erector used oxyfuel for years, but changed to plasma and benefitted from faster, more precise cuts.
February 10, 2016 | By Eric Lundin
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 | By Seth McGuire
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.
October 28, 2015 | By Dan Davis
An industry observer says the OCTG industry is in “turm-oil,” which is hard to dispute. Falling prices, a global economic slowdown, and an excess of supply is going to keep the industry down for the near term.
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 | By Eric Lundin
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.
July 9, 2015 | By Eric Lundin
Laser welding on a tube or pipe mill wouldn’t be very effective without a good control system. Eric Lundin interviewed TRUMPF to learn about the capabilities of the company’s SeamLine and SeamLine Pro systems.
June 2, 2015 | By Pierre Huot
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 | By Steve Lowery
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.