Flange mating surfaces are not painted at all.
The are small grooved lines present on mating surfaces to provide necessary roughness for ensuring that gasket is in place.
On Wed, Feb 27, 2013 at 11:56 AM, Suresh Babu <suresh75.babu@gmail.com> wrote:
Dear Experts,--We have some flat face flanges in Pressure vessel. The pressure vessel manufacturer done the painting on the flat face up to the bolt hole and left the remaining face unpainted. I hope the entire flat face will leave as unpainted. I am trying to get info from client which type of Gasket they will use at site.Please put your suggestions.
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