Tube and Pipe Fabrication Articles

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Tips on designing tubular parts for bending

April 18, 2016 | By Jon Canfield

Designing components, assemblies, and finished products is one thing; designing them for ease of manufacturability is something else altogether. Designers and engineers can use the tips in this article to design bent tubular parts to be as simple, and therefore as economical, as possible.

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Heartthrob finds a less exhausting way to clean parts

April 18, 2016 | By Eric Lundin

Cleaning the inside of long, bent tubes is a chore, especially when it has to be done outdoors in inclement weather. Nobody knew this better than the staff at Heartthrob Exhaust Accessories, Litchfield, Minn., when they had to use a pressure washer outside during winter months. An ultrasonic cleaning machine brought the process indoors while making it faster and less labor intensive.

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Plasma provides pleasant parting process for pipeline project

March 17, 2016 | By Eric Lundin

Oxyfuel has been the process of choice for cutting and gouging for field repairs for many years, but the crew on the Seaway 2 project found that a prototype model from Hypertherm provided a faster, quieter, more precise process.

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Two bending processes, two directions, four tooling sets, one machine

March 16, 2016 | By Eric Lundin

As design software becomes more complex, and as engineers strive to differentiate their products from those of their competitors by developing increasingly complex, unique, and aesthetically pleasing products, manufacturers have to keep up. Superior Tube Products Inc., Davenport, Iowa, found that its conventional tube benders weren’t always up to the task, and invested in a twin-head servo-driven machine.

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Swaging a war on piping system leaks

March 16, 2016 | By Eric Lundin

While welding and threading have their place in pipeline systems, mechanical connectors can be a good alternative, especially in applications subject to shock loading, constant vibration, and thermal cycling. Bolt-on flanges are one example; for small diameters, radially swaged connectors can be even better.

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Refueling, repairing, refurbishing, redeploying a supercarrier

February 10, 2016 | By Eric Lundin

Every aircraft carrier is built to last, and the nuclear propulsion systems mean they don’t need port calls to fuel up, but even the most well-built and durable carriers need an overhaul after 25 years at sea. Editor Eric Lundin visited the USS Abraham Lincoln, CVN 72, to learn about the refueling and complex overhaul process from contractor Newport News Shipbuilding.

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Improving 400 series weld seams in tube, pipe production

February 3, 2016 | By Cary B. Long, Dr. Yehuda Baskin

Chromium is a miracle element when added to iron, combining with oxygen to form chromium oxide, the compound that prevents rust in stainless steels. The downside is that it also impedes bonding, making stainless difficult to weld. Using a flux can help by improving weld quality and allowing faster welding speeds.

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Structural tube fabrication: Getting a solid connection for HSS

February 1, 2016 | By Tim Heston

One architectural fabricator has developed a connection and fabrication system for the modular construction of hollow structural sections, or HSS. Such connections show just how efficient modular construction can be.

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Acoustic mapping finds defects on tube, pipe ID

January 14, 2016 | By Tom Adams

Acoustic microimaging has long been used to find inclusions and voids between two bonded tubes or pipes. A new application for this technology precisely measures the wall thickness along the entire length of a tube or pipe.

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Custom-made tube bender handles challenging shapes, eliminates scrap

November 2, 2015 | By Eric Lundin

Exercise equipment manufacturer Cybex International makes workout machines with tubular frames from parts it bends in-house. The company has quite a bit of bending expertise, but one problem it couldn’t resolve was the bending of short lengths. A custom-made bender from Unison provided Cybex with the capability it needed.

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Don’t be drawn in by an offer too good to pass up

September 3, 2015 | By James Brooks

Evaluating a new lubricant for drawing tube can be a lot of work, but breaking it down into a series of small evaluations can make it easier to manage. A complete trial involves applying the lubricant, drawing the tube, removing the lubricant, and disposal.

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A little fabricator grows up

September 2, 2015 | By Eric Lundin

Under the stewardship of founders Larry and Gloria Dlouhy, Superior Tube Products grew from a small proprietorship into a midsized fabricator. It is entering its 25th year in business with a new management style, a new strategy, and a new outlook on the future.

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Making joint design, equipment choices for successful orbital GTAW

September 1, 2015 | By Timothy Gittens, V. John Jusionis

Orbital welding is a straightforward concept, but the many choices in joint design and equipment features can turn even a simple orbital welding project into something complex. Industry veteran V. John Jusionis discusses three common joint designs and several key equipment features to produce a successful outcome.

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Electroslag cladding provides alternative to standard cladding techniques

August 25, 2015 | By Peter Jeirud, Pieter Keultjes

Cladding, often used in manufacturing or repair, is a good way to conserve an expensive alloy. Weld cladding techniques can be manual or automated. A conventional automated technique is submerged arc strip cladding (SASC), but this isn’t the only process. Electroslag strip cladding (ESSC) is a viable alternative.

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Business as usual versus a change for good

August 25, 2015 | By George Winton

Columnist George Winton discusses a way to combine two operations into one seamless process by adding a drill to a CNC tube bender.

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