Tube and Pipe Fabrication Articles

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.

Filter Content

Is your bend good enough?

July 13, 2004 | By Eric Lundin

Bending tube or pipe so the finished product conforms to one of two bending standards can help to reduce rejects and improve relations between fabricators and their customers. The standards can facilitate the use of bending terms, and promote an understanding of bending tolerances and acceptable defects before starting a bending project.

Continue Reading

Bending and handling tube

July 13, 2004 | By Mike Bollheimer

Three main types of tube bending equipment are dedicated, CNC, and automated bending cells. Understanding the advantages of each is crucial to deciding which type to purchase.

Continue Reading

Low-tech system mechanizes pipe welding: Backing device allows GMAW on open root

March 11, 2004 | By Helmut Hahn

Welding technology has changed dramatically over the last few decades. Although skilled welders always will be needed in manufacturing, mechanical welding devices can provide improvements over manual welding in terms of repeatability and throughput.

Continue Reading

Flying high with orbital welding

March 11, 2004 | By Steve Purnell

Orbital welding first was developed in the late 1960s by a group of engineers from McDonnell Douglas to join aerospace tubes. These engineers were aware of the problems associated with producing repeatable welds for their critical applications.

Continue Reading

Documenting welds from an orbital welding power supply

February 12, 2004 | By Barbara K. Henon

Weld inspection, weld logging, and weld recordkeeping always have been a part of quality assurance (QA) procedures for certain industries, particularly aerospace, nuclear power, semiconductor, and pharmaceutical.

Continue Reading

Choosing the right robotic weld cell for your operation

January 29, 2004 | By Michael Passmore

Your company's first robot may cause more trouble than expected. This doesn't mean that the robot will not work, but it is a piece of

Continue Reading

Troubleshooting compression bending

January 13, 2004 | By Marsha Blasengame

You can achieve nearly trouble-free bending by being aware of the causes of typical compression bending problems and by correctly operating and maintaining the compression bender. Most compression bending problems are one of three types:Flattening or collapsing on the outside of the bend.Crimping...

Continue Reading

Structural tube on campus

January 13, 2004

Central Washington University in Ellensburg, Wash., is known for its strong science programs. "Flying Bridge," a structure designed by artist and sculptor Ed Carpenter, physically and metaphorically spans the biology and chemistry departments in the university's new Dean Science Building. Carpenter, who designed the bridge with engineering consultation from Peterson Structural Engineers Inc., teamed up with Albina Pipe Bending Co. Inc. to tackle the project's material bending and fabrication requirements.

Continue Reading

Taking tubular aluminum scaffolding to new heights

December 11, 2003 | By Kate Bachman

For the company that broke the world record for building the tallest freestanding structure with a 320-foot scaffolding (the Statue of Liberty restoration project in 1984, see Sidebarat bottom of page)designing and constructing the scaffolding for the Washington Monument restoration project was just a natural next step.

Continue Reading

Selecting a welding frequency

December 11, 2003 | By Paul Scott

Early power supplies for contact and induction welding for tube production, which were introduced in the 1950s, operated at 300 to 400 kHz. Modern power supplied, introduced in the 1990s, are variable from 200 to 400 kHz. While using any frequency in this range can produce acceptable welds for most applications, finite element analysis can be helpful for finding the optimal frequency for a particular gauge and material.

Continue Reading

Six-axis tube laser adds new dimension to job shop

November 20, 2003

Since its founding in 1988 as a stamping job shop, the Kooima Co.'s equipment and services have evolved to meet the changing demands of its customers—always with the goal of providing them with one-stop shopping for all their primary metal fabricating needs.

Continue Reading

Zero to sixty in the blink of an eye

November 20, 2003 | By Eric Lundin

The engine roars to life, and Bruce Van Sant inches the motorcycle forward, stopping about 25 feet from the starting line. Alan Geetings, crew member of the Van Sant racing team, sprays the asphalt with water. Bruce revs up the engine. The engine's torque breaks the rear tire's grip on the asphalt and it spins furiously. The air is suddenly filled with a cloud of smoke and the smell of burning rubber. After heating the tire, Bruce approaches the starting line.

Continue Reading

Laser tube processing

November 20, 2003 | By David Gilmore

The introduction of lasers to the manufacturing process has changed the fabrication of tubing. Today, many manual processes can be replaced with laser processing techniques. Using the flexibility afforded by lasers, a bundle of raw tubing can be loaded into a laser tube cutter; parts can be cut with high accuracy, quality, and speed; and then finished parts from the machine can be sent directly to the final assembly.

Continue Reading

Using a gel-type tube lube

October 23, 2003 | By Keith M. Karbum

As one manufacturer of automotive exhaust assemblies recently discovered, selecting the most appropriate lubricant for a tube bending operation can have a dramatic impact on part quality, workplace cleanliness, and economic efficiency. Although the liquid lubricant it was using was reliable and...

Continue Reading

Using finite element analysis to roll-form tubes

October 9, 2003 | By Karan Shah, Taylan Altan, Ph.D.

Roll forming is a common method for producing steel tubes. It is a continuous process in which a strip is guided through several sets of rolls that form the strip into the desired shape. After the final shape is achieved, tube edges are welded together to form a closed section. After the welding operation, the tube is sized through another set of rolls to obtain the required diameter.

Continue Reading