Tube and Pipe Production Articles

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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Taming two weld beads - TheFabricator.com

Taming two weld beads

June 8, 2012

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The essential tube and pipe production processes on a weld mill haven't changed much since the 1920s. Some new processes are available, such as laser welding, and the line speeds are faster, but much else hasn't changed. One factor that has undergone some change is how the weld bead, also known as scarf and a stringer, is handled. The conventional method was to wind it up as it came off the tube, but OD scarf choppers reduced operator exposure to this strand of red-hot, razor-sharp metal. Similcut has taken safety a step further by introducing a self-feeding OD chopper and wheelless, cantilevered ID chopper.

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When, where, why to use nondestructive testing methods - TheFabricator.com

When, where, why to use nondestructive testing methods

March 9, 2012

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The type of inspection needed for piping systems depends on which code or standard is invoked for the project. Understanding the order inspection requirements can make or break a contractor. This article should shed some light on the various pitfalls that can be avoided by understanding the relevant testing requirements.

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Evaluating drawing lubricants - TheFabricator.com

Evaluating drawing lubricants

February 1, 2012

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Chlorinated lubricants, which have been phased out in Canada and Europe, are still used in many metal-forming applications in the U.S. This class of lubricants is under scrutiny in the U.S., so it makes sense to test alternative lubricants now. Evaluating a lubricant for drawing tube requires much more than simply measuring the draw load during a pull. A comprehensive test evaluates ease of cleaning and finished tube quality also.

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Replacing the tapered roller bearings in your mill tooling frequently? - TheFabricator.com

Replacing the tapered roller bearings in your mill tooling frequently?

December 21, 2011

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Overlooking a small component on a tube or pipe mill—even something as seemingly insignificant as the roller bearings inside the inboard and outboard stands—can lead to excessive downtime. Learning the proper way to install and maintain these bearings can extend their service life and improve the mill’s uptime.

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weld-seam normalizing

Heat-treating line pipe weld seams

October 10, 2011

As the use of thick-walled pipe for API applications grows, so does the need to verify that it has been correctly normalized. Use of 2-D simulation verifies that the temperatures and heating pattern needed to obtain the desired strength and toughness have been achieved.

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HPTR's past, present, and future—Part II - TheFabricator.com

HPTR's past, present, and future—Part II

July 11, 2011

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Editor's Note: This article is the second of a two-part series. Part I examined the development, design, and functions of the high-precision tube roller (HPTR). Part II discusses the HPTR’s current role and modern applications. At its creation, the high-precision tube rolling (HPTR) mill was...

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HPTR titanium tube

HPTR’s past, present, and future — Part I

June 18, 2011

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Initially developed in the 1950s for manufacturing tubing with ultrathin walls for nuclear fuel cladding, the high-precision tube roller (HPTR) continues to provide a fast, economical way to achieve extreme reductions in diameter and wall thickness.

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Dust collection system

Designing a dust collection system for weld seam remetallizing

February 25, 2011

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OHSA seems to be taking an increased interest in worker safety and, according to OMB Watch, has been citing an increasing number of workplace violations. Tube and pipe producers who remetallize their product pay particular attention to OSHA Directive Number CPL 03-00-008, which deals with a hazard specific to remetallizing operations: explosive dust.

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Changing the point of attack - TheFabricator.com

Changing the point of attack

December 8, 2010

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For inline cutoff, tube and pipe producers typically use a mechanically driven, single-blade device. This type of cutoff unit is good for most applications, but in many specialized cases, it might not produce good results. Square or rectangular tubes, heavy walls, and lockseam tubing present cutoff challenges that call for a hydraulic unit or a swing blade.

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Cold drawing principles - TheFabricator

Cold drawing principles

June 8, 2010

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Understanding that drawing a tube requires more than just pointing and drawing is a good start to a successful draw. Procuring the raw material, pointing, drawing, straightening, and finishing are the five steps fabricators need to keep in mind.

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notching options hole saw

Notching options

April 26, 2010

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While most fabricators could probably name three methods for notching tube, they actually have six choices. Understanding the advantages and disadvantages of each is the first step in selecting one.

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flying cutoff saw blades

Choices in flying cutoff saw blades

December 2, 2009

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Friction saws are the conventional cutoff machines for tube and pipe mills. Drawbacks include hazards (noise and risk of breakage) and burrs they tend to generate. Tungsten-carbide-tipped (TCT) blades, which require more sophisticated sawing machines, run slower and safer, cut cleaner, and are less prone to breakage.

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laser based inspection welding

Laser-based inspection for laser welding

October 20, 2009

New developments in laser-based inspection systems offer tube and pipe mills real-time inspection of laser-welded seams. These systems can help to shorten setup time, improve weld quality, and reduce scrap.

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rotary straighteners tube pipe

Rotary straighteners for tube and pipe

September 25, 2009

Although six-roll straightening machines were the industry standard for decades, 10-roll machines provide twice as many bending moments and therefore turn out straighter, rounder tube.

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tube mill coolant

Shopping for a new tube mill coolant?

September 2, 2009

Many mill coolants are available today. Understanding the factors that drive selection and management of these fluids can help to minimize the costs of their use in welded tube production.

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