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Protective coatings are utilized for asset preservation on welded steel potable water tanks. The technology available to the Owner or Specifier is diverse and can be difficult to select the most sustainable solution. Data based service life assessment of the various coating options provides the best avenue for completing life cycle costing estimates for decision making.
The National Sanitation Foundation (NSF) has recently revised the NSF/ANSI/CAN Std. 61 “Drinking Water System Components –Health Effects Standard” resulting in the creation of a new standard, NSF/ANSI/CAN Std. 600 “Health Effects Evaluation and Criteria for Chemicals in Drinking Water”. This results in changes in potable water asset owners’ options for protective coating systems. As well, in June 2021 AWWA published a new revision of the AWWA D102-21 Coating Steel Water-Storage Tanks. Many owners fail to realize a protective coatings system is itself an asset, and asset management principles should be applied to the selection of a protective coating system.
Robust integrity management plans are critical for ensuring the lifespan and preventing failures of manmade infrastructure, including the metal (carbon steel) infrastructure that dominates the oil and gas industry. In this sector and others, many types of corrosion can occur on metal infrastructure, including corrosion that involves the participation of microorganisms, commonly referred to as microbiologically influenced corrosion, or MIC. MIC can be difficult to diagnose as the cause of a given infrastructure failure because it is not a stand-alone mechanism – the physical and chemical properties of a system can influence the types of microorganisms that are present and active, while the metabolisms of these microorganisms can influence the surrounding chemistry and physical properties of a system.
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Improved holiday detection of new coatings can increase a coating’s service life. This paper describes development of a fast, compact and portable holiday detector based on imaging of fluorescent coatings that is designed for ballast tanks inspection on Navy ships.
What is the cost of Tank Linings? Are we able to answer this properly, do we take into account all the factors, and do we see the main cost driver? It is a well known fact that time is money, and if we take into account the cost of being out of service or a delay in beginning operations then the cost of time is far greater than individual costs of producing equipment and coating them.