The tube and pipe fabrication technology area covers sawing (band, circular, and friction) and other cutting processes, such as abrasive, flame, laser, oxyfuel, plasma, and waterjet. It also discusses forming processes, including bending and end forming. Finally, it includes a handful of miscellaneous processes, such as trimming, beveling, finning, grooving, threading, and spinning.
July 29, 2016 | By Soroush Karimzadeh
Pipe welding often requires frequent adjustments to changing conditions. Some changes are significant enough to make automation impractical. Today, though, collaborative robotics is helping to make pipe welding automation more flexible.
July 11, 2016 | By Wynn H. Kearns
Most fabricators work with standard lengths of straight tube, but this isn’t the only possibility. Many alloys are available in coiled form, can lead to faster processing, better use of floor space, and increased material yields.
July 7, 2016 | By Eric Lundin
Sustainability and green technology are no longer buzzwords, but comprise a host of enduring manufacturing practices. Equipment manufacturer Schwarze-Robitec has rolled out numerous developments to conserve energy, consumables, material, and other resources.
July 5, 2016 | By Eric Lundin
After learning to weld on the family farm and honing his skill during his college years, Josh Foster decided to augment his steady, part-time job with a fabrication business. Big Creek Metal Works makes all sort of items, from large ranch gates to small art items, specializing in custom work.
June 2, 2016 | By Tim Heston
If Richards Sheet Metal Works had taken the conventional path, it would have invested in a new flat-sheet cutting laser, especially considering its 5-kW workhorse was more than a decade old. But Richards isn’t a conventional metal fabricator. Today it has one of the largest tube cutting lasers in the country.
May 26, 2016 | By Eric Lundin
Eric Lundin provides an overview of many of the technologies displayed at the 2016 Tube Düsseldorf expo.
Alloy P91 has excellent high-temperature strength and creep resistance, making it a favored alloy for piping systems for power boilers and other applications that work at elevated temperatures and pressures. The conventional welding processes, gas tungsten arc welding and shielded metal arc welding, do a good job on P91, but modified gas metal arc welding (GMAW) processes and flux-cored arc welding (FCAW) have deposition rates three to four times faster.
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.
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.
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.
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.
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.
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.
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.
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.