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The "CHANGE" in Usual codes would mean addition and deletion of PWHT to a qualified procedure requires Re-Qualification of the procedure. However, the statement in AWS D15.1 has gone further in my opinion in that it means any change in temperature to that qualified would require...

With the amount of H2S you may have some HIC in the line pipe depending upon steel composition. Companies like AEA Technology and OIS (Aberdeen) both in UK have Time of Flight Diffraction (TOFD) equipment that can be effectively used for your purpose. You should be able to get their Contact...

Corrosion in humidity under atmospheric conditions in almost due to lower Mo content. Type 316L has specified Mo content of 2-3% Mo. Suppliers tend to keep this as close to 2%Mo as possible. If you can get guaranteed 2.75%Mo containing SS then the observed pitting corrosion would not occur...

Related Question >mcguire; Since the mixture will contain dilute NaCl is there any danger of SCC if the tank isn't subject to PWHT? Just a thought!

The austenitising temperature would be around 925 deg C. However, the holding time at temperature of ~30 minutes may lead to some grain growth and de-carburisation unless you have very good control over furnace atmosphere. There would be loss of strength since mechanical properties are achieved...

Piping for high pressure sour gas injection facility made from type 316L. Due to low blow down conditions the design temperature is -175 deg F. Bolts will be exposed to high humidity marine offshore environment. DSS 2205 not suitable nor will PTFE coated SS (B8M SS) due to variable quality of...