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Arc Welding 101: Tackling trim in pulsed MIG welding

October 1, 2014

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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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P&ID software upgrades 2-D drawings, streamlines workflow

September 30, 2014

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Using 2-D software in a world that has transitioned to 3-D software can be a difficult task. When Cougar Fuel Systems looked for new software, it looked for a system that also would shorten its product design time and manage the many design and production tasks. It found a suitable system when it purchased Smap3D P&ID and Smap Piping from CAD Partner Products Inc.

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Arc Welding 101: Which welds need visual inspection?

September 30, 2014

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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

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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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When fumes get out of control

September 29, 2014

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When fume extraction equipment is on the fritz, there are definite warning signs present that should alert you to the problem. The more attentive you are to what these warning signs are, and the more familiar you are with how to address these problems, the quicker you can ensure that the health and safety of shop personnel and equipment will be restored.

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Why safety is personal at Michigan metal fabricator

September 29, 2014

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Sue Rollins takes safety personally, and for good reason. The quality assurance manager and safety coordinator at Genzink Steel, Holland Mich., has a life history greatly affected by workplace hazards. To be effective and to convey her message, she makes quality and safety personal.

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Having the right information at the right time

September 29, 2014

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Advanced Metal Components has endured tragedy and evolved into a major employer in rural Swainsboro, Ga. Part of it comes from having the right technology, but most of the company’s evolution has involved a perception change about inventory management.

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Arc Welding 101: Three keys to a successful CWI

September 26, 2014

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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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Selecting filler metals for stainless steel welding

September 23, 2014

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Q: We're a midsize job shop that manufactures a wide variety of products from various types of metal. Currently we have a project that requires welding 304L to 316L stainless steel and welding both of these alloys to A572 Grade 50 steel. Some of the welds are structural and some are used in...

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Globular-transfer mode for MIG

September 23, 2014

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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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Choosing the right aluminum filler alloy

September 22, 2014

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How do you know which aluminum filler alloy to use? With several varieties out there, it’s important to be familiar with the type of application and the type of results you are looking for. Those and other considerations will lead you to choosing the right alloy.

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Want to take up powder coating?

September 15, 2014

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As more metal fabricators look to increase value-added activities, they are considering adding a powder coating line. Before they do that, however, they need to know what's involved. They need to select a system that fits a specific footprint, can deliver the customers’ surface appearance and corrosion protection requirements, and meets budget constraints. In other words, they really need to do their homework.

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Weld Cleanup Poses Challenges for Oilfield Workers

September 15, 2014

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Attention to proper weld cleaning is especially critical in field applications.

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Metal-cored wires: Your questions answered

September 8, 2014

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When does switching to metal-cored wires make sense? Answers to the most commonly asked questions about this consumable can help you decide if it’s right for your operation.

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Aerospace parts manufacturer upgrades bending capability

September 8, 2014

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Bending tubular parts for the aerospace industry isn’t easy. OEMs continue to push the envelope, designing increasingly complex parts made from pricey materials. Fabricators are under continuous pressure to improve their capabilities, turn orders around faster, and minimize scrap. To that end, SL Engineering recently invested in a second all-electric bender from Unison.

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