TPJ - The Tube & Pipe Journal®

April/May 2003

TPJ - The Tube & Pipe Journal® became the first magazine dedicated to serving the metal tube and pipe industry in 1990. Today, it remains the only North American publication devoted to this industry and it has become the most trusted source of information for tube and pipe professionals. Subscriptions are free to qualified tube and pipe professionals in North America.


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Selected articles from the April/May 2003 issue available online:

Dealing with internal pressure in free hydraulic bulging

June 12, 2003

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For hydraulic tube bulging, direct pressure control is the most commonly used process. Pressure control allows engineers to determine the correct capacity hydraulic system and, more importantly, prevent tube rupture. However, inflow control, or control of the volume of fluid inside the tube, theoretically could be another viable hydroforming process. Finite element analysis has shown that inflow control could allow engineers to more accurately predict deformation behavior and therefore enhance the hydroforming process.

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Batter up! Turning an aluminum tube into a baseball bat

May 29, 2003

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The roar of the crowd, the shouts of the umpire, the crack of the bat hitting the ball—these are the unmistakable sounds of a baseball game. Over the last few decades, however, one of those sounds has changed; now the bat tends to make a distinctive, resonating ping. It's the sound of aluminum rather than wood making contact with the ball.

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Defibrillators—Should you have one in your workplace?

May 29, 2003

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This article explores the facts about AEDs, the legalities surrounding their use by laypersons, and guidelines for implementing an AED program in the workplace.

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Automotive motives - Tips for cutting per-piece prices for automotive customers

May 29, 2003

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Today's automotive industry is more competitive than ever. To compete with the European, Mexican, and Asian markets, the U.S. market must become more aggressive in finding ways to cut costs.

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Roll form tooling tryout and troubleshooting

May 29, 2003

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The secret to developing successful roll tooling—whether for tube production or roll forming—and achieving maximum roll integrity is a simple but often overlooked notion: a comprehensive approach.

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Solving the mysteries of the fin pass—Part 2

May 15, 2003

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Editor's Note: This article is the second part of a two-part series about fin passes. Part I discusses their location, what they do, and how they do it. Part II focuses on troubleshooting.

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Inspecting welds on complex tube forms

May 15, 2003

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Eddy current has long been used for inspecting straight seamless or welded tubing. New developments allow the use of this technology to inspect complex tube forms as well.

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Producing holes in tubing

May 15, 2003

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Need to put a hole in a tube? This article provides an overview of tube punching and tube piercing, exploring the different variations of each method and comparing the two methods on cost, safety, and flexibility.

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