Tube and Pipe Production

The tube and pipe production technology area encompasses mills and all of the equipment that makes a mill run successfully: tooling, welding units, nondestructive testers, bundlers, scarfing equipment, straighteners, scrap choppers, and washing systems.

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Troubleshooting OCTG threading: Part II

May 4, 2004

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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...

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Keeping stainless steels stainless

May 4, 2004

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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?

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Managing environmental risk in tube, pipe production

January 29, 2004

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 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...

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Pulling taffy and producing tube

December 11, 2003

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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...

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Plotting for success

October 23, 2003

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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.

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Measuring tube as it grows and shrinks

August 28, 2003

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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:...

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Minimizing wall thickness variation in seamless tubing

August 28, 2003

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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.

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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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Solving the mysteries of the fin pass—Part 1

April 10, 2003

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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.

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Coil joining criteria for tube and pipe mills

March 13, 2003

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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.

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Don't lose your bearing!

February 27, 2003

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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.

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The process of contoured tubing manufacturing

February 28, 2002

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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.

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Using flowformed titanium alloy seamless tubes in production

February 14, 2002

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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.

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Using existing tooling for new product applications

November 29, 2001

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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.

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