API 582 mentions oxygen content of the back purging gas at the weld that shall be reduced to maximum of 0.5%. And to have an oxygen concentration monitoring system is mandatory. That stands critical to DSS welding.
For compliance to interpass temperature, base metal correponding maximum value shall ...

I would recommend you to go through NACE Paper NACE-2019-13290. That provides some very good insights.

NACE Standard Practice SP0775 contains details on recording data, and interpretation of coupon data after you install & monitor.

Make your question a bit more clearer to provide you any response.

admino wrote: 08 Jul 2026, 18:48 [Guest Post: guest_1783536356556]

How to manage corrosion loops along with RBI Software

Have you checked for some sort of vibrations where you install PSV?
Did you check if there are any transportation issues particularly with this piece when carried to the site?
Same technician, inspector are certifying this piece every time that is tested in the shops?
Did it actually pop at the ...

Okay, you may then look into the tube expansion /rolling quality which can be improper.
There could be some SCC under mild service conditions. That stays invisible until failure occurs.
High velocity consideration due to flow maldistribution can lead to erosion - check those signs. Low velocity at ...

Better you start with having a set of deadlegs typically present, and explain that to the team involved with you to identify, if you are an inspection /integrity individual. However, as a team member, you just need to know that stagnant flow in any part of the metallic piping component pose a risk ...

We have a digitized MOC system however do not have any PSSR digitized with all its content.
Back in last year i remember having some update to link that but still not, just a requirement only (whether done or not).

Typical services include:
Radiant coil outlet piping
Convection section piping
Transfer lines from fired heaters
Hot hydrocarbon piping
High-temperature steam piping
Typical operating temperature:
450–650°C
Can be used higher depending on design code and stress calculations.

See the general rule of thumb here is that you choose triangular pitch when thermal performance and compactness are the priorities and the shell-side fluid is relatively clean.
Choose square pitch when shell-side fouling and ease of maintenance are the dominant concerns.