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Re: PT dwell time variations in reference to temperature extremes

Posted by: S.V.Swamy Profile (PID_839), E-mail: Address, on December 27, 2008 at 00:50 :

In Reply to: PT dwell time variations in reference to temperature extremes posted by : Jim Stuckless , E-mail: Address, on December 23, 2008 at 22:40 :

What is vague about them? And the manufacturers provide enough literature, if needed. If the temperature is too low, viscosity will be too high and penetration will not take place properly. If the temperature is too high, the penetrant will dry out and will again not penetrate. If in doubt, use test coupons at the same temperature and see whether you are able to pick up the needed indications.

Swamy
NDT Guru
Hyderabad, India

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: Does anybody have....... or know where i can find.... a table outlining penetrant and developer dwell times with regards to temperature? I know certain codes and standards provide guidelines but I'm looking for something less vague.
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