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.
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.
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 the root of the weld, with inert gas backing, with backing flux and with flux-coated wire.
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 welding?
Together with the United Association (UA), MCAA is excited to bring you a new Clean Energy Heat Pump Performance Program. Heat pumps provide clean energy that can reduce or eliminate carbon dioxide from energy sources, thus operating more efficiently. Numerous state and federal financial incentives make heat pumps beneficial to both building owners and contractors. Signatory contractors and UA members are uniquely qualified to get trained and perform the work to reduce the carbon footprint for any state or city. Email Raffi Elchemmas (raffi@mcaa.org) or Robert Vilches (rvilches@uanet.org) to sign up.
The use of BIM and related technologies and processes that leverage data from models is delivering meaningful impact to mechanical and HVAC contractors on a wide variety of measures, including cost and schedule improvements, enhanced productivity, better collaboration between stakeholders and better worker safety. This research report quantifies other benefits to users and the challenges related to leveraging BIM to increase industry understanding of which factors will most effectively drive growth and expand future use.
Improved productivity and quality are among the benefits driving interest in, and use of, prefabrication and modular construction today. This research report quantifies other benefits to users and the challenges related to each to increase industry understanding of which factors will most effectively drive growth and expand future use.