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Hvo PTNG 1

The document outlines standards for paint application, emphasizing first-class workmanship and protection of surrounding areas from spillage. It specifies weather conditions under which painting can occur, including temperature and humidity limits, and provides guidelines for spray application methods. Additionally, it highlights the importance of using appropriate techniques and equipment to ensure a uniform and quality finish.

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Rajesh Rajesh
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11 views1 page

Hvo PTNG 1

The document outlines standards for paint application, emphasizing first-class workmanship and protection of surrounding areas from spillage. It specifies weather conditions under which painting can occur, including temperature and humidity limits, and provides guidelines for spray application methods. Additionally, it highlights the importance of using appropriate techniques and equipment to ensure a uniform and quality finish.

Uploaded by

Rajesh Rajesh
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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8.

2 Workmanship
Paint application shall be of a first-class workmanship, with a uniform film thickness and
appearance and shall be free of brush marks, sags, runs, foreign matter, etc.
Care shall be taken to protect adjacent equipment, piping, structure, etc. from spillage and spatter
during field painting by use of adequate temporary covers.

8.3 Weather Conditions


(Revision) Painting shall not be performed when the temperature of the surface is less than 3ºC
above the dew point of the surrounding air or when the relative humidity of the air is greater than
85% (Except for zinc ethyl silicate). See Appendix 5.
(Revision) If solvent based Inorganic zinc silicates are used these shall only be applied when the
relative humidity is above 50%.
(Revision) Guidance on the estimation of the probability of condensation can be found in ISO
8502-4. The measurement of these conditions is the responsibility of the painting contractor.
For application and curing of epoxy below 10ºC, surface or ambient temperature, a winter
formulation shall be used or forced curing shall be applied.
When steel is painted in hot weather, precautions shall be taken to ensure that the specified DFT
of paint is obtained.
In addition, paints shall not be applied under the following conditions:
 When the surface temperature is greater than 40ºC, unless the paint is suited for
application at this temperature.
 When the air temperature is less than 5ºC.
 When there is the likelihood of an unfavorable change in weather conditions within
two hours after painting.
 When there is a deposition of moisture in the form of rain, condensation, frost, etc.

8.4 Spray Application


Airless or pneumatic spray applications are the preferred method of application. Spray painting in
the field may cause interference with other work so approval must first be obtained from the
Principal.
If spray painting is to be carried out, the following shall be taken into account: The correct spray
tips, air pressures etc. as recommended by the equipment supplier, shall be used.
Each coat shall be applied uniformly and completely over the entire surface. All runs and sags
shall be brushed out immediately or the paint removed and re-sprayed. Very complex structures

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