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.
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.
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.
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.
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.
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.
November 2, 2009 | By Tim Heston
Relieving residual stress through welding technique as well as temperature control can greatly reduce weld distortion.
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.
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
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.
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)...
It's more important than ever for your employees—particularly entry-level personnel—to learn to use measurement tools to their full potential.
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).
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?
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.