NACE0175-2003 interpretation

[sm1348]

My interpretation form nace is presenence of some sort of gas or vapor is necessery in a sour service to create the environment as described in nace. If the appliction for example is a liquid full vessel oil or water where under normao operating conditions no gas or vapor present, is this still covered by nace? When there is no vapor, there will be no H2S partial pressure.
Any comments?

 

[EdStainless]

When you drop the pressure does any gas come out of solution? If so it is covered.
Note that there are rules for both sweet and sour service.

Corrosion never sleeps, but it can be slowed down.

 

[bmoorthy]

Which NACE MR 0175 you are discussing. There are 2 MR 0175!!!. The first deals with Oil field and the second deals with Refinery and Pertochemical plants.

 

[sm1348]

I am interested in the oil field revision.
Is there siginificant different between the two?

 

[YLWEA]

see the links below for a summary of recent changes and background information. they include a mention of the various parts of the standard and describes the recent adoption by ISO so it is now a NACE/ISO standard that includes three parts:
general principles
carbon and low alloy steels
corrosion reistant alloys

http://www.nace.org/NACE/Content/technical/MR0175/Mr0175index.asp

also see,

http://www.nace.org/nacestore/assets/freestandardsreports/NACEISO.pdf