G28 A Corrosion Test on a Valve

[jexton]

We are required to carry out a G28 A Corrosion test on a small bore ball valve which we can obtain from stock - which parts are subject to the testing? Can we only carry this out before the product is manufactured from the raw material of each component?

 

[EdStainless]

Is there any welding or brazing in your process?
If not I don't see why you couldn't do this on the RM.
However you would have to assure that you examined the full cross section of the material.

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P.E. Metallurgy, Plymouth Tube

 

[SJones]

Better to ask the entity that is doing the requiring. Typically, the G28 A test would be a manufacturing quality control test for a nickel alloy such as N06625. Guidance as to the parts to test is given in subclause 6.2 of the standard.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.