Normally the pipe lines are buried in soil, hence the thickness of the protective layer,coating/painting, should be considerd and, also various mechanical properties, such as permeability of water, ability to withstand pressure due to soil expansion/contraction as the climate changes, bacterial attack resistace etc etc. Normally life span of the pipe line is considered as 75 years during the design, so we have select the option matching that too.
Hope you know that recoating is not viable on undergroud pipelines. so various aspects are there.
Painting above ground considerations include decorative aspects and protective aspects. Also economical considerations will be there.
Hope you got the point.
Thanks and regards,
Arun S Das
Velosi Certification LLC
+919847051202 ( India )
From: srinivas rao <firstname.lastname@example.org>
Sent: Sun, 24 October, 2010 3:04:19 PM
Subject: [MW:7759] coating or painting
Why is coating preferred in pipelines but not painting and painting but not coating in AG piping? why not vice-versa? Is it that corrosion is more due to earth?
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