Tube and Pipe Fabrication

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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CPR for your old CNC bender

February 27, 2003

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In the 1980s, when CNC machinery evolved, tube fabricators made the transition from manually forming each part to allowing a machine to form the parts unassisted. Now in the age of Windows®-based computers and brushless electric servo drives, these machines can seem like relics. But don't take them to the scrap heap just yet.

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Comparing materials for high-temperature steam piping

January 16, 2003

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Of all the materials used for high-temperature steam piping, X20 (12 percent chromium, 1 percent molybdenum, 1/4 percent vanadium) and P91 (9 percent chromium, 1 percent molybdenum, 1/4 percent vanadium) stand out because of their very high creep rupture properties, even at elevated temperatures.

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Assessing developments in orbital welding—Part 2

December 12, 2002

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Orbital welding's advantages in productivity, quality, consistency, tracability, and skill level required are the driving factors behind its growth. Advances such as oxygen analyzers that prevent the weld cycle from starting until oxygen is properly purged, combined with its ability to generate a written report of each weld, form the basis for orbital welding's improved quality and tracability.

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Piping in productivity

November 21, 2002

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Using orbital welding equipment led to productivity gains in one of the nation's first fusion-welded underground pipelines.

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Common tube and pipe image

Save money when ordering bends

November 21, 2002

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Bending tube and pipe has become increasingly popular throughout the metal fabrication industry. Bending inherently saves money over other fabrication methods, such as the cutting and welding of standard fittings or the use of cast elbows. However, fabricators can reduce costs further by following simple procedures while designing or ordering bends.

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Lubes and the new materials: It's a different game

November 7, 2002

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Changes taking place in tube and pipe producing and fabricating may require you to review your lubrication strategies. One of these changes is the increased use of aluminum, aluminized steel, and stainless steel tubing.

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Tube cutting laser

Focusing on tube cutting lasers

November 7, 2002

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State-of-the-art laser technology for cutting metal tubes includes capabilities for cutoff, beveling, and cutting an infinite variety of shapes such as holes, slots, and notches. In this article, manufacturers of laser cutting equipment discuss the state of advancements such as automated loading and unloading of parts; simplified programming; automatedinspection of finished parts; and lights-out operation.

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Enclosed-arc weld heads

Assessing developments in orbital welding—Part 1

September 12, 2002

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The GTAW Process Editor's Note: This article is the first part of a two-part series about developments in orbital welding. Part I discusses power supplies, weld heads, and electrodes. Part II, which will appear in the October/November issue, will focus on hardware and accessories that improve...

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Lubricant comparison chart

Forming exhaust components with an alternative lubricant

September 12, 2002

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Switching from an oil-based lubricant to a water-based gel lubricant helped an exhaust-system components manufacturer, Zeuna Starker, reduce costs and cycle time. After studying several types of lubricants, the company chose a water-based gel that was less prone to spilling onto the floor and did not produce smoke during the welding process. The company reaped benefits in decreased housekeeping and disposal costs, and found that it did not need to wash the lubricant residue from semifinished parts before welding.

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EdgeCAM software screenshot

Automating for the future

August 29, 2002

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If you need to cut production time, you might glean a few tips from a little job shop in Ohio that has made the most of its software.

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Pipe image

Understanding coating adhesion

August 15, 2002

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Coatings for tube and pipe can serve as a primer for subsequent painting or they can provide corrosion protection.

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Say 'no!' to burrs, dimples

July 11, 2002

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As tube mill speeds increase, tube end cut quality suffers. Meanwhile, customer requirements for end cut quality continually increase. Tube producers are turning to dedimpling and deburring machines to enhance tube cut quality and improve worker safety.

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Postweld chart

Welding chromium-molybdenum steel pipe for power plants

July 11, 2002

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New power plants are in high demand and several hundred can be expected to be built over the next decade. Chromium-molybdenum steel pipe (P91) is a major construction material in these plants and there are particular methods for welding it properly to insure it will hold up. Preheat and postweld heat treatment are mandatory and absolutely critical to the service life of the alloy. Induction heating is a growing method for preheating and postweld heat treating.

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Expanding Their Reach

June 27, 2002

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Expandable-casing pipe is being used by some aggressive OCTG players, causing oil companies to look at deep water and land based wells in a whole new light.

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Cutting Costs

June 27, 2002

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This article describes different ways to contain tube and pipe welding fabrication costs, focusing on the option of using particular weld prep equipment. It outlines specific applications in thin-wall tube and pipe fabrication and installation and pipe with a heavier wall thickness.

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