May 4, 2004 | By Robert White
Read Part I Editor's Note: This article, Part II of a two-part series on tube and pipe threading, explores troubleshooting related to threading cutting, insert shape, chip breaker geometry, coatings, and coolants. An examination of the cutting tools used on the finishing floor to...
May 4, 2004 | By Carl R. Loper Jr.
Stainless steels are inherently resistant to surface attack in mildly corrosive environments. However, when corrosion does occur, it can result in the formation of pits on the surface or within crevices of the part. Why does this situation develop, and what can be done to prevent catastrophic failure?
January 29, 2004 | By Kim Conant
Editor's Note: This article is adapted from a presentation made at the TPJ Symposium, March 16-18, 2003, Scottsdale, Ariz.The U.S. Congress and the states have created a complex scheme of environmental rules and regulations with which tube and pipe producers must comply. Failure to do so...
December 11, 2003 | By W.B. "Bud" Graham
Do you remember going to the county fair and watching candy makers make taffy? As a child I often would watch the whirling motion of the taffy pull machine as it whipped and pulled and whipped and pulled again and again until the candy was the right consistency, texture, and color. As long as the...
October 23, 2003 | By W.B. "Bud" Graham
The butler slipped through the pantry area with the warm milk and, after adding some arsenic, served the beverage to his master. The butler had been gradually increasing the amount of arsenic over many months, so the change in the milk's taste wasn't noticeable. Soon the mistress and her nefarious servant would be rid of the one thing stopping their affair.
August 28, 2003 | By W.B. "Bud" Graham
We always have some confusion at our house concerning desserts. My wife claims that I like only two kinds of pie: hot and cold. Well, she is mostly right. My favorite is cherry, and I love it served either hot or cold. Here's our family recipe—you be the judge. Grandma's Cherry Pie Ingredients:...
August 28, 2003 | By Wynn H. Kearns
All mechanical steel tubing has some amount of wall thickness variation. Wall variation in welded tubing results from the strip manufacturing and tube welding processes. Seamless tube, which is created from a hot billet of solid steel, has wall variation that results from tooling wear, bearing and shaft variation, and normal hot-process variation. The wall thickness in seamless tubing varies in the cross section and along the tube's length.
May 29, 2003 | By Dan Mennecke
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.
May 15, 2003 | By W.B. "Bud" Graham
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.
April 10, 2003 | By W.B. "Bud" Graham
The fin pass was not the first time your father gave you five bucks for your allowance. The fin passes are those forming passes that immediately follow the breakdown or initial forming stages on a tube mill. Their role is paramount in the successful final presentation of the formed tubular section to the welding process.
March 13, 2003 | By Steve Shaffer
A coil end joiner, shear welder, end welder, coil splicer, strip welder, shear and end welder, or butt welder—whatever you call it, it performs the same simple task coil after coil: It quickly shears strip ends, butts them, and provides a smooth ductile weld so that the newly joined coil can pass through a tube mill.
February 27, 2003 | By W.B. "Bud" Graham
It's Monday morning after a long holiday weekend, and the first shift is starting with a bang. The slit coil supplier is late with your delivery, the second-shift maintenance person has called in sick, the mill operator is going to be late to work, and you wish you were still at the beach with the family.
February 28, 2002 | By Werner Wasmer
This article discusses the importance of new technology in the roll forming industry, especially in welded contoured tubing. The author discusses the process of welding contoured tubing all the way through to the end product.
February 14, 2002 | By George Durfee
Lots of strength, lots of uses: Ti-6AL-4V, combined with the flowforming process can make sense for a wealth of industrial and consumer applications.
November 29, 2001 | By David Jenkins Jr.
The article outlines factors for consideration when changing material type, grade, coatings, efficient speed requirements, specialty shapes, etc. Special consideration is given to the difference in speed between the minor relief angle and the root diameter.