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.

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Making a 20-degree Marman bead

July 20, 2009

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Two forming methods can make a bead for an airtight seal on a metal tube: rotary (spin) forming and progressive ram forming. Each has advantages and disadvantages in bead profile, cycle time, amount of wall thinning, and so on.

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photogrammetry measurements

Focusing on bent tubing

June 29, 2009

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Measuring the bends and straight sections of a bent tube can be tricky and time-consuming, especially if the tube has a large number of bends in several directions. Photogrammetry, also known as optical measurement, uses a booth equipped with several digital cameras to make a digital image of the part, allowing fast, easy measurements.

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orbital welding unit

Orbital welding technology breaks new ground

June 4, 2009

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Automated orbital welding technology has evolved to the point where one welding system can perform multiple processes and adapt welding parameters in real-time.

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teeing up orbital welding

Teeing up orbital welding

June 3, 2009

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Two technologies improve the quality and decrease the cost of fabricating high-purity systems, such as those used in the food and beverage, dairy, pharmaceutical, and semiconductor industries. These two techniques are mechanically formed T connections and orbital welding. A common question is this: Can orbital welding be used on mechanically formed T connections? The answer is yes, but fabricators need to understand the limitations and restrictions of this combination.

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cnc bender

Affordable automation

May 28, 2009

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Competition is tough and getting tougher. A critical strategy for staying in business is automation. Putting together a flexible, automated system with quick-change capability can help tube fabricators manufacture a variety of parts, both for existing projects and future programs. A few key pieces of equipment and a long-term view of current and future projects can help to justify the expense.

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bending tubular sections

Bending rolled steel sections

April 1, 2009

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Bending tube or pipe successfully is a matter of managing a handful of processes and variables and controlling the flow of the metal. The same principles apply to bending profiles, or rolled steel sections (RSS). However, because profiles aren't closed, they are more prone to distortion than tube or pipe. A close look at an RSS bending job provides a step-by-step approach for tackling this sort of project.

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Designing an OCTG finishing floor for welded pipe

April 1, 2009

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Although the energy market has seen ups and downs, overall the trend is a growth path. A manufacturer of welded structural and mechanical tube and pipe can get into this market by using its existing mill to manufacture oil country tubular goods (such as line pipe and casing) and adding a finishing floor to its operations. Understanding API requirements is the first step in planning a finishing floor layout.

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Saving money on complex tube end forms

March 9, 2009

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"Cut costs, cut costs, cut costs" is a mantra that echoes from engineering cubicles to production floors in manufacturing companies far and wide.

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titanium energy demand

Titanium trends

March 9, 2009

Electricity demand grew an average of 15,000 megawatts per year from 1995 to 2006, and this trend will undoubtedly continue. The Energy Information Administration predicts that meeting future demands will require the equivalent of more than 20 new 500-MW power plants per year over the next 20 years or so. A critical component in power plant construction is titanium tubing, which is favored for its high strength and corrosion resistance.

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Installed Grille Gaurd

Fabricator lassos an improved packing process

February 10, 2009

Ranch Hand Truck Accessories was established in the area in 1986 to produce truck grille guards, a product that still comprises a majority of the company's sales. A 25 percent increase in production of its grille guards and front bumper replacements led to the need for a faster, more efficient, and more protective way of packaging its products.

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Automated processing flexible coax-system

Coax Facts

January 1, 2009

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Continuous improvement and statistical process control are useful,time-tested techniques—they have been used since the 1950s—buttheir use must be tailored to specific applications. For example, atypical manufacturing metric is parts per minute, but many rollformers should measure feet per minute. This and other tips can helproll formers accurately evaluate their productivity and measure theimpact of process improvements.

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The ins and outs of extrusion bending

December 12, 2008

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Extrusions can be tricky to bend and handle. Paying close attention tobender selection, die design, programming, and material handling can help to ensure efficient and productive bending.

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Fact or Friction?

December 4, 2008

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The tube and pipe bending process is full of variables and options, all of which you must understand and manage successfully to make the end product.

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Teaching an old piercing mill new tricks

December 2, 2008

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Many seamless tube producers in North America use cross-roll piercing mills built in the 1950s that were based on designs from the1930s. While it would be advantageous to replace such aged equipment, that isn't always necessary. A minor equipment upgrade can do wonders. Improving the bar steadiers—the devices that hold the mandrel the steady as the pipe exits the mill—can greatly improve the mill's output and reduce the pipe's wall thickness variation.

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Waste not, want not

November 25, 2008

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For many bending applications, it is common practice to determine the necessary length of tube, run a few samples, make some minor adjustments, and then start production runs. The problem is that the initial evaluation may have been based on safe, by-the-book estimates and calculations. Re-evaluating a bending project might yield substantial material savings.

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