CoatingsPro Magazine

MAR 2018

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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COATINGSPRO MARCH 2018 23 specifications and general composition of the coating to be applied, which will dictate the target temperature range for efficient curing. e type of heating is also a major consideration. In many cases, electric heat is preferred over propane-supplied heat, as propane may introduce significant moisture that could hinder the curing process. Propane heat also introduces air quality concerns in enclosed areas where workers are present. Deploying the Right Heating Solution Once this background information has been collected and all parties are fully informed of the heating require- ments for the application, the heating provider can deploy the most efficient solution. A mobile heater w ith suffi- cient power is deployed to the site and hooked to the asset via duct work. Sticking with the tank example, temperature sensors would then be affixed to various locations around the vessel, with the number of sensors dictated by the size of the tank. During tank refurbishment operations when work crews are present (such as grinding out of old paint), the heating system pulls fresh air and heats it to a comfort- able temperature range. e temperature sensors continuously monitor the interior temperature of the tank and relay this information to the thermostat on the heater, which allows the heater to regulate a safe and comfortable tempera- ture for the work crews. Once the new coating has been applied, the heater ramps up the temperature inside the tank to the desired range for the curing process. Once again, the temperature sensors relay real-time information back to the heater's thermostat and control system. e control system then lowers or raises the output of the heater to keep the interior of the tank within the predetermined temperature window for optimal curing. In-Field Curing for Wind Turbine Blades e need for efficient in-field solutions is not limited to industrial tanks. For example, North American operators of large wind turbine farms also require a repair and coating solution that can be carried out efficiently in the field. After a decade in service, the turbine blades can exhibit coating failures and stress-related cracking. Due to the size of the blades — each one can be up to 150 feet (45.7 m) in length, depending on the turbine — the operators cannot Notes From the Field Re ad e r In qui r y at co ati n g sp ro m a g.co m /i n q0318

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