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Sensor Experts to Tackle Huge Corrosion Problem

The nuclear, renewable-energy and construction sectors also spend a fortune monitoring corrosion that is hidden under insulation. For the offshore sector, corrosion under insulation (CUI) on pipelines and other infrastructure is estimated to cost about £3.5 billion a year. Current practice relies on periodic removal of insulation in selected areas to check visually for problems – but that could be about to change. A new project involving Scotland’s Innovation Centre for Sensor and Imaging Systems (Censis) and specialist company CorrosionRADAR, a spin-out from Cranfield University, will explore the use of remote sensors to monitor corrosion continually without the need to…


Corrosion Under Insulation: The 7 Inspection Methods You Must Know About

As we discussed in our previous article, corrosion under insulation (CUI) is one of the most difficult corrosion processes to prevent. The reason for that is, by and large, no matter the precautions taken, water invariably seeps into the insulation and begins its dirty work—sometimes unseen until process leakage occurs. Data shows that about 60% of pipe leaks are caused by CUI. That’s not good. CUI is difficult to find because the insulation covers the corrosion problem until it is too late. Removing insulation, inspecting, and then reinstating the insulation after inspection is an expensive process. Inspecting without removing insulation…


Interview with Craig Drumheller: Insights to Buried Ducts in Attics

The 2018 edition of the International Energy Conservation Code (IECC) has been published, and it includes new provisions regarding HVAC ducts buried in vented attic insulation. The code changes, proposed by Craig Drumheller from the National Association of Home Builders (NAHB), allow ducts to be buried in attic insulation, and when using the performance path, provides credit for the improved duct efficiency.     We sat down with Craig to dive into some of the details of his proposed code change, and how it can influence duct system design and energy savings. Can you give us a brief explanation of your…


Intro to Commercial Building HVAC Systems and Energy Code Requirements

Overview of common commercial building heating, ventilating, and air conditioning (HVAC) systems as they relate to energy code requirements. Learn about the most common HVAC systems and equipment, along with energy-related components and controls. Several important energy code requirements will be reviewed, including what to look for in the field or on plans. Learning Objectives: Identify common HVAC system types Identify important HVAC controls, including economizers Name high impact energy code items related to HVAC equipment and controls List the steps in verifying fan power calculations Click here to watch this presentation. https://news.jm.com/blog/hvac-insulation/intro-commercial-building-hvac-systems-and-energy-code-requirements


Johns Manville Releases the First Flexible R-12 Fiberglass Duct Liner

Johns Manville is proud to announce its release of the first ever flexible fiberglass duct liner with an R-12 thermal resistivity rating. This innovative insulation is designed specifically to meet the new code requirements set forth by the IECC in 2015 that mandate the use of R-12 insulation on ducts in unconditioned spaces in climate zones 5-8. Click here to read more about this new R-12 duct liner.  https://news.jm.com/blog/hvac-insulation/johns-manville-releases-first-flexible-r-12-fiberglass-duct-liner


Long-Term Corrosion Testing: What Happened Next?

In 2017 and 2018, Johns Manville built upon the long-term, third-party corrosion testing we started in 2016, and the new results are in. The research sought to explore how corrosion under insulation (CUI) impacts a completely insulated pipe system (pipe, insulation, and jacketing) under conditions designed to accelerate corrosion. The test program started in 2016 with two hydrophobic high-temperature blanket insulations (InsulThin™ HT microporous blanket and a silica aerogel blanket) and in 2017 was expanded to include testing on calcium silicate and expanded perlite insulation. While traditional research and testing isolate variables to strictly explore the interaction of insulation on…

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