In the project spec mentions that the salt testing shall take place prior to abrasive blasting of hand took surface prep. As far as the acceptable limit goes, there is no specific figure, it mentions only :
"any salts discovered shall be removed by washing, the surface retested and the process...
Hello All,
I am responsible for painting inspection in a tank farm upgrade project and I could use your help. Our tanks are old and after repairs are done, washing with fresh water is to be done, then sandblasting and painting with a system suitable for marine environment, that is also...
To my experience Hastelloy is a Nickel- Chromium - Molybdenum alloy used in high temperature applications with good oxidation resistance and for good resistance to stress corrosion cracking.
It can be used up to 870 deg Celsius with good ductility and is mainly used in high temperature refinery...
As explained in my original email, PWHT cannot be done period.
Other ways to avoid PWHT acceptable by code exist and this is what will be done.
My question is really only about the filler material properties.
And sorry about the mistake - you are of course correct - the correct reference to...
Thanks metengr & pradipgoswami for your replies.
Some additional information:
-The vessel is designed as per ASME VIII Div.1 (but vessel not U-stamped)
-The service involves no S, is typical combustion environment (fuel + air)
-PWHT as per ASME VIII(see UNF-33(f): 885deg C for 90min)
-The...
We have manufactured a pressure vessel for testing purposes (no ASME U stamp) out of Ni alloy 800H.
All welds were welded using the ERNiCr-3 electrode. The vessel was PWHTed as per ASME requirements (~890 deg C).
After operating for short time (2400 hours) some repairs are necessary and one of...
