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Arc Welding 101: Certified to weld?

October 20, 2014 | By Paul Cameron

Q: What does it mean to be an AWS-certified welder? Joe C. A: Certification can open doors, present opportunities, and put you out front in a tough job market. However, not all welders are AWS-certified. My younger brother Joe, a service manager for an import car dealership on the West Coast,...

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Part-time job brings full-time satisfaction

October 17, 2014 | By Eric Lundin

After a career in welding and fabricating, Charlie Wolfe is semi-retired and working 25 hours a week at the local community college. However, his network of friends is vast and his reputation as a go-to guy for one-off projects and repairs is sterling, so he’s actually busier now then he was back when he worked 40 hours a week

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Weld shop 101

October 13, 2014 | By Samantha Noland

According to the American Welding Society (AWS), there will be a shortage of approximately 290,000 welders in the U.S. by 2020. Education doesn’t fall on the shoulders of just high schools, community colleges, and technical programs, it also rests with industry professionals who have the space, equipment, and the expertise on staff to demonstrate the best practices. Arming educators with this information will only help make the next generation of welders that much stronger. For those of you who are in areas where getting hands-on training for industry leaders isn’t possible, here are a few questions educators tend to ask.

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Arc Welding 101: Negatives to whipping and weaving

October 9, 2014 | By Paul Cameron

Q: When using GMAW on carbon steel materials 1/8 inch thick or greater, we use a whipping technique that you have described as a bad work habit. What are the negative effects of whipping or weaving?John S. A: As with many welding techniques, there is a time and place for everything, even whipping...

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Arc Welding 101: Sorting out SAW

October 8, 2014 | By Paul Cameron

Q: What is the procedure qualification test for manufacturing pipe using submerged arc welding?Sandesh P. A: Pipe is manufactured by one of these four methods: electric resistance welding (ERW)/high-frequency induction (HFI) welding, seamless (plug/mandrel mill and extrusion), spiral welding, and...

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Arc Welding 101: Satisfying the weld inspector

October 7, 2014 | By Paul Cameron

Q: We have a stiffener bar (continuity connection) in a column that calls for AWS D1.1 BTC-P4 for the flanges and fillet welds on both sides in the web. The stiffeners were field-welded. After assembling 35 connections, we discovered no fillet weld on the bottom side in the web. We can’t weld the...

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Arc Welding 101: What's up with a WPS?

October 6, 2014 | By Paul Cameron

Q: Do I need a welding procedure specification (WPS) for my company when it is just me and all I do is on-site portable welding of a wide range of items?Steven B. A: Whether your company requires a WPS depends on the customers you serve. For example, if your company is hired to fabricate your...

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Arc Welding 101: Vertical-up or -down in robotic welding?

October 3, 2014 | By Paul Cameron

Q: We have a weldment that incorporates 0.375-in.-diameter steel rods and a 0.060-in.-thick sheet metal stamping of 1018 CR material. Each weld is the same, 0.75 in. long with a 0.25-in. fillet, perhaps including weaving. The assembly is fixture and welded robotically using GMAW with CO2 gas and...

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Arc Welding 101: Clearing up ASME B31.3

October 2, 2014 | By Paul Cameron

Q: I am unclear about a section relative to the ASME B31.3 code for chemical plant piping.The area of this code referring to the type of welding process that is acceptable—328.2.2—states welding procedures qualified by others may be used, provided that the following conditions are met: The...

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Arc Welding 101: Tackling trim in pulsed MIG welding

October 1, 2014 | By Paul Cameron

Q: We use the pulsed-spray-transfer GMAW process in our shop. When setting weld voltage, we can adjust the trim between 0.5 and 1.5. What do those numbers mean, and how do they relate to weld voltage?Corey G. A: Pulsed-spray-transfer welding equipment has challenged the conventional wisdom we’ve...

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Arc Welding 101: Which welds need visual inspection?

September 30, 2014 | By Paul Cameron

Q: We work on off-road and lifting equipment, and our welders are qualified per AWS D1.1. Which welds are required to be inspected visually and by whom?Ed Z. A: When you asked which welds are required to be inspected visually, I had to snicker. There was a time in my life when one side of my hard...

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Arc Welding 101: Addressing linear porosity

September 29, 2014 | By Paul Cameron

Q: We are experiencing linear porosity at the furthest point of penetration when welding heavy plate. The porosity is 0.3 mm dia., but it occurs regularly in every weld we’ve sectioned so far.We are using a semiautomatic spray transfer process with a 0.045-in. ER70S-6 electrode, and a shielding...

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Arc Welding 101: Three keys to a successful CWI

September 26, 2014 | By Paul Cameron

Q: I was recently interviewed by a writer who was researching how welders make the transition to certified welding inspectors (CWI). One of the questions he asked was, “What key skills make for the best certified welding inspector?” A: Communication—written, photographed, or verbal—is the...

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Arc Welding 101: Globular-transfer mode for MIG

September 23, 2014 | By Paul Cameron

Q: I am employed as an AWS D.1.1-qualified welder at a machine shop. I was wondering why you can certify on 75 percent argon/25 percent CO2 when you are not allowed to use a short-circuit transfer on materials over 3/16 in. You need at least 83 percent argon to obtain a spray transfer, yet I passed...

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Arc Welding 101: Achieving a good work lead connection

August 29, 2014 | By Paul Cameron

Q: What makes a good ground connection, and why is it important? A: In a welding circuit, current needs to pass through as few connections as possible, and the circuit itself needs to be as short as is practical. On the positive (+) side for gas metal arc welding (GMAW), direct-current electrode...

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