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TOPIC: Optimum temperature and flash point for enamels

Optimum temperature and flash point for enamels 1 year 5 months ago #2505

  • Peter watson
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Hello
What is the optimum temperature for enamels in the tank during enameling process. Is it could be above flash point of enamel? If we use enamel with temperature above the it's flash point what would happened? If possible please explain about flash point and it's application in use?

Thanks a lot
Last Edit: 1 year 5 months ago by Peter J Stewart-Hay.
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Optimum temperature and flash point for enamels 1 year 5 months ago #2507

Hello Peter

You must get this information on flash point for each enamel from your from your enamel manufacturers.

As far as "Flash Point" is concerned, please see en.wikipedia.org/wiki/Flash_point

Thank you.
Regards,
Peter J. Stewart-Hay Principal
Stewart-Hay Associates
www.Stewart-Hay.com
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Optimum temperature and flash point for enamels 1 year 5 months ago #2508

  • Peter watson
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Hello again
Yes we know flash point of our enamels, but I wonder whether the working temperature of enamel can be higher than the flash point ? In other words is flash point the optimun working temperature.

Best Regards
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Optimum temperature and flash point for enamels 1 year 5 months ago #2509

Hello again to you Peter,

Since the flash point of a volatile material is the lowest temperature at which it can vaporize to form an ignitable mixture in air, I wouldn't go anywhere near or above that temperature as you could indeed have a dangerous explosion and fire!
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Peter J. Stewart-Hay Principal
Stewart-Hay Associates
www.Stewart-Hay.com
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Optimum temperature and flash point for enamels 1 year 5 months ago #2524

  • Richard Burke
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The temperature of the enamel is dependent upon the type of system that you have. If it is an open tank system, when you heat the enamel in the tank you are evaporating the solvents, which increases the viscosity of the enamel and depending upon the type of applicator, can cause a variety of problems which ultimately cause poor quality enameled wire.

If you have a closed system - enamel is in an closed tank or bottle. Just before the enamel reaches the applicator, it is heated. Enamel at room temperature has a certain viscosity. When you heat the enamel, the viscosity drops and the enamel will flow better through dies or felts.

In an open system you have to keep adding enamel to replace usage and solvents to replace those that have evaporated into the air. Evey time you add enamel or solvent, you change the temperature and viscosity in the tank which means that enamel consistency is gone. When consistency goes so does quality.
Last Edit: 1 year 5 months ago by Peter J Stewart-Hay.
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Re: Optimum temperature and flash point for enamels 1 year 5 months ago #2525

  • Mr Nima Rahati
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Hello Richard
Thanks for your reply. When enamel is in an closed tank, it is heated to certain tempetature. but it returns into the tank with higher temperature because of wire temperature. sometimes this process cause the enamel temperature in the tank rises up to flash point and more. Is it necessery coolig the enamel temperature .

thanks
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