Tube and Pipe Fabrication Articles

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Inspecting welds on complex tube forms

May 15, 2003 | By Dan DeVries, Jim Cox

Eddy current has long been used for inspecting straight seamless or welded tubing. New developments allow the use of this technology to inspect complex tube forms as well.

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Producing holes in tubing

May 15, 2003 | By Todd Bryson

Need to put a hole in a tube? This article provides an overview of tube punching and tube piercing, exploring the different variations of each method and comparing the two methods on cost, safety, and flexibility.

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Brazing copper tubing

May 15, 2003 | By Walter Sperko, P.E.

Torch brazing copper tubing is one of the most common–but widely misunderstood–joining processes. It's possible to make sound joints that are just as strong as the copper tube, easier to braze, and less expensive to produce. But first you have to know basic brazing concepts, including joint design, filler metal behavior, and metallurgy.

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Coating fabricating tooling

April 24, 2003 | By Dave Petrack

Tube fabricators all over the country are starting to see some major benefits from new coating technology. Many coatings-both those that are time-proven and new ones just hitting the market-can provide many benefits for many tube fabrication processes, including extended tooling life, better finished parts, and less stress on machinery.

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The anatomy of a monster truck

April 24, 2003 | By Eric Lundin

It drives right over nearly every obstacle in its path and splits nearly every eardrum in its vicinity. It's supercharged, oversized, and extraordinary. It stands more than 10 feet tall, develops more than 1,500 horsepower, and can leap over a 727 jet airliner in a single bound.

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Making the connection

April 10, 2003 | By Eric Patty

Hundreds of types of machined end connectors are used to transmit fluid in fabricated tube and hose assemblies. In recent years manufacturers and end users of these connectors have been developing new methods and processes that eliminate machined connectors and the associated joining operation. Eliminating connectors and joining operations can help save both money and time.

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Making the cut

April 10, 2003 | By Håkan Hellbergh, Susan DeJesus

Band sawing is the starting point for many tube and pipe fabricating operations, and it can help determine the throughput and profitability of your whole shop. Maximizing the productivity of tube or pipe cutoff requires a coordinated approach to saw blades, sawing machines, and your cutoff process.

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Specifying the sulfur content of 316L stainless steel for orbital welding

March 27, 2003 | By Barbara K. Henon

The widespread use of autogenous (fusion) orbital gas tungsten arc welding (GTAW) in the high-purity semiconductor and biopharmaceutical industries, combined with modern steel refining technology, has made it both desirable and practical to supply type 316L stainless steel with a restricted range of elemental sulfur.

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The basics of roll form tooling design

March 27, 2003 | By Chuck Summerhill

You can successfully roll-form a profile more than one way. In fact, many roll form designers take different approaches to design and development. Also, because the roll forming process has a seeming limitless capacity to produce complex profiles with just as many variables, many roll form designs are one-of-a-kind; therefore, theory can go only so far.

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Heating P91 boiler pipe

March 13, 2003 | By Mike Roth

In the power piping industry, turnaround time on a boiler pipe project typically is from 20 to 36 weeks. But J.F. Ahern Co. (JFA), Fond du Lac, Wis., a company ranked as one of the Midwest's top 10 mechanical contractors according to the May 2002 Contractor magazine, isn't typical. Neither were the results JFA achieved when it switched to induction technology for pipe preheating.

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Using precision abrasive wheel technology

March 13, 2003 | By Jordon Jablons

Precision abrasive wheel cutting is a small but important niche in the abrasive cutting field. It can be used to cut many types of parts, including metal rods, tubes, extruded shapes, and even wire. It is most useful in operations characterized by small parts, hard-to-cut materials, and tight tolerances.

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Does your tube travel more than you do?

February 27, 2003 | By Dave Petrack

The level of technology used these days in the tube and pipe fabrication industry varies quite a bit in terms of age. Some of it is a bit antiquated, to put it kindly. Many tube fabrication shops use equipment that is more than 50 years old.

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CPR for your old CNC bender

February 27, 2003 | By Kent Horn

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 | By P.K. Saha

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 | By Steve Purnell

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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