[MW:18243] RE: 18231] corrosion inside valve,NACE

Dear Mr. Nair

 

You already have some insight to the problem that the “ valves were not properly drained and dried out”,

this is one of the requirement as spelt out by ARAMCO. This can be said as a NCR- as far as the seriousness

of the matter is concerned, it will depend as to how serious is the oxidation, if can be covered as an

acceptable from the corrosion allowance point of view.

 

The main acceptance criteria will depend upon the specifications given to the vendor.

The corrosion can be on any material even if it is from UK, USA, France etc. but you need to see the

Acceptability, as the same will be accepted by many of us and few may be of the opinion as to go for rejection.

 

Wait for some more input from our team.

 

Regards

 

Nachhattar Singh

 

PLEASE THINK BEFORE PRINTING

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ratheesh Ramachandran
Sent: 21 July, 2013 7:53 PM
To: materials-welding@googlegroups.com
Subject: [MW:18231] corrosion inside valve,NACE

 

Dear All,

 

            During our material receiving inspection here in  project site laydown yard,we noticed small quantity of water inside the newly arrived lot of  imported(Bonney Forge,Italy ) gate valves and piston check valves(1",3/4",A105N/F316 NACE) .These valves when tilted or put in inverted position, we could see drops of water coming out .We also saw some discoloration in the disc and in other internal parts of these valves  when checked from the outside ,which seems like rust.

 

         Some inspectors here are having the opinion that this water content inside the valves is due to the improper drying after the hydro tests at the vendors shop and these valves shall be rejected due to the rusting took place in the valve internals.But some are having the opinion that these discoloration of the internal of these valves are not serious and cannot result in any damage to the valves once put in the service lines.Kindly see the photograph attached.

 

        Dear Experts,kindly mail me your valuable opinion on this issue

 

thanks&regards

ratheesh nair

ksa

 

 

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