I worked on an on-shore oilfield redevelopment project last year where
all the 18 new Air Receivers had to be coated inside as a requirement
of the client (Shell in this case). So I assume that when they require
it for this specific project they also will require this for other
projects. All specifications of Shell are international used standard
specifications (so called DEP's = Design and Engineering Practices). I
think you need a very good designer if he wants to convince Shell
about not using such coating if it is prescribed by there proved
specifications.
Best Regards,
Herman Pieper
On 9 mei, 08:10, Fereidoun Majdnia <fmajd...@technip.com> wrote:
> Dear Herman and Members,
> Air receivers are not logically coated internally in Oil and Gas industry.
> If some clients ask for internal coating it need to be followed. An
> experience designer would clarify with client. Air Receivers are not
> categorized as high risk ranking items, they normally are not inspected
> while in or out of service. If you inspect them internally after 5-10 years
> only shallow scattered pittings would be seen inside the vessel. No risk on
> the continuous operation.
> Even coating with high adhesion would peel off after long in service. This
> risk is always higher than corrosion on vessel.
>
> Regards
>
> hpi001
> <pieper-qsi@kpnma
> il.nl> To
> Sent by: "Materials & Welding"
> materials-welding <materials-welding@googlegroups.com
> @googlegroups.com >
> cc
>
> 05/06/2010 08:09 Subject
> PM [MW:5094] Re: corrosion resistant
> plating
>
> Please respond to
> materials-welding
> @googlegroups.com
>
> Dear Mr. Majdnia,
>
> If a Air Receiver need to be painted depends completely on the
> customers requirements. For example Shell mostly requires 300-350 µm
> epoxy coating at the inside in order to prevent any corrosion caused
> by high air humidity, especially if such air receiver is in front of a
> expensive compressor.
> To ensure that this coating doesn't come off Shell requires a special
> pull off test for each serial coating system / material combination.
> I'm not sure but I think that all these requirements are laid down in
> Shell DEP 31.40.30.32.gen. This specification also specify the
> requirements for surface preparation in order to ensure proper
> adhesion.
>
> Best Regards,
>
> Herman Pieper
>
> On 6 mei, 12:56, Fereidoun Majdnia <fmajd...@technip.com> wrote:
>
>
>
> > Dear Pankaj
> > Air Receivers are not normally painted or coated internally for two main
> > reasons:
> > 1- Air is not corrosive even in harsh environment and the moist
> accumulated
> > in humid areas is drained periodically not to build up inside the vessel.
> > 2- If internally coated the coat may get pilled off and carried into
> > instrument and cause their malfunction.
>
> > Regards
>
> > pankaj abhang
> > <pankaj.abhang1@g
> > mail.com>
> To
> > Sent by: materials-welding@googlegroups.com
> > materials-welding
> cc
> > @googlegroups.com
>
> Subject
> > [MW:5079] corrosion resistant
> > 05/05/2010 03:03 plating
> > PM
>
> > Please respond to
> > materials-welding
> > @googlegroups.com
>
> > Dear all
> > I am having a vessel of CS i want to give corrosion resistant coating
> from
> > inside any body will tell me the procedure such as paint, powder,or by
> > electro plating method.The vessel is of Air reciver vessel constructed
> as
> > per ASME. The coating to be done from inside to avoid corrosion.
>
> > The size of vessel is Dia-1100, Length-2400 mm.
> > MOC- SA516 GR. 70
>
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