Category: Estimating
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NCPWB Technical Bulletin: Microbiologically Influenced Corrosion (MIC)
What is Microbiologically Influenced Corrosion (MIC) and why do contractors need to know anything about it? Well, it turns out that MIC can negatively affect your profits.
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NCPWB Technical Bulletin: Purge to Protect Stainless-Steel Pipe Welds
On occasion we get questions from our members who would like to use backing flux in lieu of purging when making welds on stainless steel or other corrosion resistant materials. This bulletin describes an experiment conducted by NCPWB Consultant Walter Sperko where he had a colleague make stainless steel butt welds without any protection of…
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NCPWB Technical Bulletin: A Welder Qualification Record Says “Backing: With or Without.” What Does That Mean?
When reviewing a Welding Procedure Specification (WPS) or a welder qualification record, the term “backing” frequently appears. In some cases, backing is required, while in others, it is optional. Backing can take various forms, including metal, non-fusing metal, nonmetallic materials, or even weld metal. But what exactly is “backing,” and why is it important in…
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NCPWB Technical Bulletin: When To Use E6010 Welding Electrodes
The E6010 electrode is a wire encased in cellulose held together with salts and minerals. These electrodes penetrate better than low-hydrogen electrodes like E7018 when making root passes, making it easier to make a good root pass. However, E6010 introduces hydrogen into the weld creating a risk of cracking, and this article shows when its…
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NCPWB Technical Bulletin: The 37-1/2 Bevel
The 37-1/2°± 2-1/2° bevel is the normal bevel angle to find on piping fittings and flanges and in many specifications and standards. Where did such a weird angle originate?
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NCPWB Technical Bulletin: The Difference Between NCPWB WPSs and AWS Standard Welding Procedures
This bulletin explains how the National Certified Pipe Welding Bureau (NCPWB) Welding Procedure Specifications (WPSs) differ from the American Welding Society (AWS) Standard Welding Procedures in both application and adoption.
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WebLEM
WebLEM is the industry’s most reliable authority for comprehensive labor units for typical project tasks. Quickly search for and retrieve information. WebLEM is reviewed and updated to reflect the latest products and joining methods. You will need your MCAA.org username and password to log in to WebLEM. For WebLEM access questions, please refer to the…
