Testing and Measuring Articles

Whether you need to measure dimensions or perform some sort of flaw detection on sheet, tube, or pipe, you'll find what you need in this technology area. It discusses measuring coordinates, diameters, and hardnesses; flaw detection using eddy current, ultrasonic, radiographic, and X-ray systems; and using a few other equipment types, such as vision systems and material composition analyzers.

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Reduction Process

How metal production affects the welding process

January 11, 2011 | By Professor R. Carlisle "Carl" Smith

Welders may recognize that when porosity is present, the cause isn’t always the shielding gas, welding filler, or operator error. It can be caused by the steel production method, which can introduce porosity and other flaws.

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Evaluating product integrity with eddy current - TheFabricator.com

Evaluating product integrity with eddy current

October 11, 2010 | By Joe Jessop

Tube and pipe producers and fabricators who are familiar with the conventional encircling coils used in eddy current testing might be interested in learning more about this technology. Eddy current can be used on a variety of product shapes and does more than detect cracks. It can detect relative hardness and hardness changes (good for verifying heat treatment) and the presence or absence of physical features such as splines and threads.

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Inspecting NDE - TheFabricator.com

Inspecting NDE

September 13, 2010 | By Sean Gleeson

When it comes to nondestructive methods for evaluating welds, familiarization with each technique will help you better identify the best means to detect weld defects.

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So you want to be a certified welding inspector? - TheFabricator

So you want to be a certified welding inspector?

July 8, 2010 | By Dan Davis

Not many people who enter the welding profession think about their long-term career path. A certified welding inspector may be the next logical step for the right welder.

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weld backing diagram

Upfront welding inspection considerations

July 7, 2010 | By Professor R. Carlisle "Carl" Smith

Welding inspection involves much more than simply checking the accuracy of welds after they are made. Inspectors must be knowledgeable about codes, standards, materials, and other fabricating processes.

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welded clock

Building a stronger welding program

June 7, 2010 | By Don Knight

Bellingham Technical College launched its Welding Rodeo in 2002 to spur enrollment and raise its public profile. Now one of the premier welding competitions in the Pacific Northwest, the event has helped the school triple its enrollment in welding and expand its program/skill offerings.

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relieve stress welding

How to relieve stress in welding

November 2, 2009 | By Tim Heston

Relieving residual stress through welding technique as well as temperature control can greatly reduce weld distortion.

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Finding seemingly insignificant flaws Part II

July 17, 2009 | By Richard L. Fisher

Eddy current testing does more than detect product defects. When used with a proper monitoring system on a mill staffed by highly trained operators, it can help to optimize the mill's efficiency. The first part of this two-part article covers eddy current system principles.

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inline eddy current testing

Finding seemingly insignificant flaws Part I

June 10, 2009 | By Richard L. Fisher

Eddy current testing does more than detect product defects. When used with a proper monitoring system on a mill staffed by highly trained operators, it can help to optimize the mill's efficiency. The first part of this two-part article covers eddy current system principles

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testing digitalscale

Inspecting and verifying fillet weld size

May 19, 2009 | By Joe Pavilanis

Woolf Aircraft Products Inc. developed an inspection tool that can beused to measure a leg length, as well as the actual throat of a weld.Using these two known measurements, quality assurance personnelthen can determine the actual size and the convexity and concavity ofa specific fillet weld.

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nondestructive testing infrastructure

Welding Update for Infrastructure: No nonsense with NDT

May 18, 2009

Infrastructure is defined as the basic physical systems that serve a community's population, such as roads, bridges, utilities, water, and sewage. These systems are essential for enabling productivity in the economy, so it is crucial to ensure they are fit for use. Nondestructive testing (NDT)...

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Measuring Tape

Precision measurement 101

March 24, 2009 | By Scott Robinson, Mike Baczewski

It's more important than ever for your employees—particularly entry-level personnel—to learn to use measurement tools to their full potential.

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Stationary sensors

Eddy current testing strategies for copper tube

March 11, 2008 | By Hari Muthuswami

If you are a copper tube producer, you know you need to use nondestructive testing methods, but you might not be aware of all the possibilities in how they are used. First off, should you check the material before or after it is processed? What are the advantages and disadvantages of each testing point? Should you test it at both places? And second, can testing do more than help you prevent shipping poor-quality product?

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Under pressure?

March 11, 2008 | By Patrick J. Cain

Although it is used primarily for forming, hydroforming equipment also is useful in many pressure testing applications (burst testing, pressure pulsation, leak testing, autofrettage).

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Tube seam laser welding

Finding poor-diffusion bonds in ferrous, nonferrous tubes

December 11, 2007 | By John Wallace

Determining whether a tube seam has a partial bond can be difficult with standard ultrasonic or eddy current techniques. However, multifrequency, probe-based eddy current equipment can detect poor-diffusion bonds in nonferrous materials. Using a penetrating field to reflect a signal off the planar structure of the weld works on ferrous materials.

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