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The paint and coatings industry has witnessed significant change over the past 50 years. These changes have been driven by many factors including VOC mandates, safety concerns, advanced polymers and new demands of the end users and materials. One of those changes was the introduction of desiccant dehumidification to assist in the blast and coatings process of liquid storage tanks in 1983. The ability to indefinitely hold a blast by providing a dry climate mechanically set off the beginning of a technology that would continue to advance for years to come.
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Presents: Relationship between humidity and degradation rates. CHP systems deployment throughout the Department of Defense. CHP systems in use on Aircraft, etc. DoD, U.S. Marine Corps and Naval Aviation CHP policy. Independent CHP performance / economic analyses by GAO. User-reported performance
To maintain strict environmental conditions, tanks are dehumidified during the surface preparation, coating application and curing. A practical approach, detailed project calculations, practical field problems & their solutions and on-site implementation of dehumidification of huge crude storage tanks is described in this paper.
Corrosion prevention and control for equipment is a costly and decreasingly effective activity for the Air Force, especially under scenarios to austere locations. One concept for remedy is a modular shelter, powered with mobile generators using integrated energy sources to reduce operational costs.
This paper will discuss utilizing temporary dehumidification and climate control equipment to reduce corrosion levels during the installation of coatings and linings applications; the science of Psychrometrics, the science behind dehumidification, and discuss how the components interact on a coatings project.
As the technology of dehumidification has developed over the last 25 years, the air conditioner has always played an active role, right along with its sister, the desiccant dehumidifier. The benefits of a refrigeration-based dehumidifier are both obvious and obscure.
Using dehumidification in shipyards has been a widely accepted practice for three decades. A lot has been learned and techniques have become much more sophisticated but the basic goal of preserving the blasted steel and creating the right conditions for coatings application remains the same. This paper discusses how various combinations of desiccant dehumidification, heating and cooling equipment have been utilized properly and some examples of when things did not work out so well.
Neptune Bulk Terminals in Vancouver, British Columbia needed to re-coat two of its ocean-going Potash Ship Loader conveyors within a 27-day window to prevent interruption of international ship loading schedules. The contractor elected to use ultra high pressure water jetting (UHPWJ) for the steel surface preparation rather than the sand blast medium used on the previous loader conveyors. This required innovative desiccant dehumidification equipment to facilitate rapid drying of the steel upon completion of the UHPWJ work due to an increased moisture load.
Industry executives involved in industrial blasting and coating projects may find it surprising that climate control equipment typically used in those processes played a major role in recovery efforts in New Orleans following Hurricane Katrina. This paper highlights how this equipment helped restore three important structures in New Orleans – the Louisiana Superdome, Notarial Archives and the evidence room of the New Orleans Police Department.
Using dehumidification for coatings and preservation has been a widely accepted practice for several decades. Over that time, both the coatings and the dehumidification equipment have grown in complexity. While this has made dehumidification more prevalent than ever, it also has made determining what you need as well as actually getting what you need more complicated than ever.
The following paper will briefly review the origin and development of dehumidification and climate control equipment for the most efficient surface preparation and coatings to surfaces in enclosed spaces. As the needs of the surface preparation and coatings industry evolve, so to do the requirements and ancillary equipment used by field personnel working on these projects.
There have been specifications written for the use of dehumidification during surface preparation and coatings since the early nineties. These early specs keyed in on parameters that were believed to get the job done and reflected the limited knowledge and experience of a very new industry. Since then, dehumidification has become much more widely accepted and specifications exist for pipes, above ground storage tanks, ships and containments.