June 20 - June 26, 2011
Which DFT statistics should be recorded in a daily inspection report, and why are they relevant to a good coating QC record?
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Carl Havemann of www.corrosioneducation.co.za on
July 18, 2011:
A record of the coating thickness is necessary to verify conformance to the specification and must include: (i) Max, Min, Mean and Standard Deviation. Standard deviation is useful in providing data on thickness consistency during application. (ii) State the DFT measurement standard used ie SSPC-PA 2 (iii) State the calibration method ie "calibrated on smooth disc with no correction factor for blast profile" (iv) Record the blast profile data (v) State the DFT instrument used and include a copy of the Calibration Certificate.
Shabbir Mansoori of National Contracting Co.(INTAP) on
June 20, 2011:
Checking and drafting of dfts as per relavant standard, which prescribes minimum, maximum and average readings according to types of surfaces. This is strong evidence of applied coating/painting for QC records.
jack wu of shanghai on
June 20, 2011:
Max Reading, Min Reading, Average Reading and surface profile(correction factor)
gijo dominic of national contracting company on
June 19, 2011:
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Lowest, highest, and average values for dft, each square meter or piece. This dft needs to be inconformance with manufacturer's recommendations. So this must be recorded for the future reference.
Dry Film Thickness (DFT)
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