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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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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improve weld seams.jpg

Looking to improve weld seams?

September 1, 2009

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Most tube and pipe producers weld the seam as it is—without additives or fillers—and risk the problems associated with oxidation. A specially formulated brazing flux, in liquid or paste form, dissolves and removes oxides, prevents re-oxidation, and helps transfer weld heat to the seam.

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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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