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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Troubleshooting OCTG threading: Part I

August 5, 2009

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High production threading of tube and pipe for use by the petroleum industry is accomplished using either mechanically actuated or digitally controlled, carbide tooled machines. The most effective way to deal with residual stress is to full body anneal each tube prior to machining; however, this may not be economically possible. One alternative is to limit the amount of energy that the tube is subjected to during machining. An examination of the cutting tools that are used to produce threaded product will reveal how the shape of the insert may affect the deformation of the tube.

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Tube cutoff system

Flexibility with smart flying shear upgrades

April 14, 2009

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Production flexibility can enable a tube and pipe producer to expand its offerings and customer base and increase its chances of survival in a down economy. One way to achieve this flexibility is to upgrade the operation's flying shear component.

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Roll Former

Selecting speed reducers for roll forming lines

November 11, 2008

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Setting up a roll forming line requires careful consideration of the speed reducers to be installed at each forming station. After determining the horsepower for each station, it is necessary to determine the appropriate durability, thermal horsepower rating, and strength for each speed reducer.

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Selecting speed reducers for roll forming lines - Horsepower isn't the only consideration

October 14, 2008

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Setting up a roll forming line requires careful consideration of the speed reducers to be installed at each forming station. After determining the horsepower for each station, it is necessary to determine the appropriate durability, thermal horsepower rating, and strength for each speed reducer.

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HFI Tube and pipe mills

Increasing efficiency of HFI tube and pipe mills

September 16, 2008

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Manufacturing welded tube and pipe efficiently requires controlling several variables. The material type, gauge, edge condition, tooling setup, and weld heat are just a few of the factors that quality control managers, mill supervisors, and operators must pay attention to in their efforts to...

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Scale

Buy it by the pound, sell it by the foot

April 15, 2008

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If you're a tube or pipe producer, you're probably under constant pressure to cut costs. And you probably know that you can reduce your raw material costs by reducing the coil width, within reason, and the change will have little noticeable impact on the final product's quality. However, this doesn't give you license to make wholesale significant width reductions. In fact, you'd probably be better off developing a comprehensive process optimization program and striving for higher efficiency instead of merely cutting costs.

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Roll Forming Diagram

Using FEM to compare tube forming processes

January 15, 2008

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Finite element analysis (FEA) software developed specifically for roll forming can help tube producers determine the best forming process for tube (such as single-radius forming, edge forming, or partial-step forming). It also can help tube producers find forming problem areas and eliminate them.

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Working with stainless on a budget

December 11, 2007

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The high cost of stainless steel—especially the spikes caused by nickel surcharges—has caused many tube manufacturers' customers to look for alternative alloys. What can tube producers expect after switching from a 300-series stainless to a less expensive alloy? It depends on the new alloy and the production process.

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Copper tube mill

Reducing conversion cost in a copper tube mill

September 11, 2007

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Sorting through the myriad quality programs and manufacturing trends—total quality management, Six Sigma, lean manufacturing—can be a daunting challenge. Knowing which strategies to use and how to use them can deliver big results in a copper tube production facility.

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Roll Forming

Roll forming high-strength materials

April 10, 2007

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The use of high-strength materials is growing, and roll forming engineers and tooling designers who want to form this material successfully need to arm themselves with knowledge about these materials, their capabilities, and the limitations. Knowledge gained from press brake bending operations is useful in predicting how these metals will form on a roll forming line.

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Tube drawing principles

March 13, 2007

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Five tube drawing methods are sinking, rod drawing, floating plug drawing, tethered plug drawing, and fixed plug drawing. Choosing the right method or combination of methods for a particular application requires understanding the characteristics of each. Tube producers also have a choice of feedstock: seamless or welded tube. Likewise, choosing the right one is a matter of understanding the differences.

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Is your cold pilger mill maintenance on schedule?

November 7, 2006

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Glen Stapleton relies on his experience in troubleshooting for more than 30 years to discuss the most pressing pilger mill maintenance issues—causes, cures, and tips to prevent breakdowns and get the machines up and running again when they do fail.

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Aluminum pipe pioneer streamlines tube mill welding

October 10, 2006

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When Hastings Irrigation Pipe Co., a manufacturer of aluminum pipe, needed to replace its decades-old welding power supplies, it looked for units that could weld a variety of thicknesses at fast welding speeds. What it found were power supplies that allowed the company to run its mills faster and save money in several ways.

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laboratory glass containers

Flushing out four-letter words: rust, dirt, and wear (Part III)

September 15, 2006

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Dirt, rust, and wear, cost tube producers and fabricators millions of dollars annually, and they can be the bane of tube processes. Analyzing the criteria for selecting the lubricants can help you select the best lubricant extend tool life and improve bends.

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Modern flying shear tube cutoff systems - Part II

August 8, 2006

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This article, Part II of a two-part series, discusses the different types of die set accelerators found in flying shear tube cutoff systems. It presents an overview of earlier accelerator technologies still in use today—cam link, assisted lift target, and air/oil units. It also discusses three common closed-loop die set accelerators that represent newer technology—hydraulic servo valve, servomotor belt, and servomotor rack and pinion.

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