Dear Mates,
-- Thanks to all for your valuable feedback.
As per my request client provided the piping class document and the subject nozzles with flat face flange will be used with FF Gaskets. So the entire flat face need unpainted and shall be protected with rust prevention compound like MOLYKOTE. So we removed all the paint from the flat face with paint remover and thinner and applied rust prevention compound.
Thanks again.
--
On Thu, Feb 28, 2013 at 1:43 PM, Gerlof Oegema <Gerlof.Oegema@aurecongroup.com> wrote:
Hi,
It is always good practice to slightly paint the clamped area of flange face only with a red oxide paint to maximum DFT of 40 microns (with gramophone finish still visible) as to prevent corrosion of this clamped area while waiting to be installed.
Regards,
G. Oegema
DISCLAIMER
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Praphulla Phirke
Sent: Thursday, February 28, 2013 11:36 AM
To: materials-welding@googlegroups.com
Cc: materials-welding@googlegroups.com
Subject: Re: [MW:16901] FLAT FACE FLANGE PAINTING
What is the test pressure ?
Better to remove the paint completely and You can use either neoprene or PTFE gaskets.
Praphulla
Sent from my iPhone
On 28-Feb-2013, at 14:05, Lalu r p <lalucpt@gmail.com> wrote:
> Dear sir
> Normally for flange faces we do not paint the surface to ensure the
> proper sealing.and it is normally machined for the gasket tightness.
>
> On 2/28/13, G Sreenivas Rao <gsrinivasg3@gmail.com> wrote:
>> Dear sir
>> In pressure vessel flat flange shall not be painted, this is for
>> gasket seating and if painted the are will not be giving seal
>> tightness. please ensure if the area is giving seal tightness then
>> can be left as it is.
>>
>> Regards
>> G.Sreenivas Rao
>>
>> On Wed, Feb 27, 2013 at 12:26 PM, 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.
>>>
>>> --
>>> Best Regards,
>>> Suresh Babu,
>>> suresh75.babu@gmail.com
>>>
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