Thank you both for your replies.
Relative strength and corrosion resistance of 625 versus 6Mo were less of a concern given the service compared to whether the 1:1 direct couple of the two metals would be an issue.
I also appreciate your comment re. letting schedule drive bad engineering -- I...
Hello,
Looking for some insight into the following case...
Open Hazardous drains line has the following spec:
- Pipe: Alloy 625 (Ni Alloy, BE, ASTM B444 UNS N06625 Gr. 1, Seamless, ASME B36.19)
- Flange: Alloy 625 (Blind Flange, Ni Alloy, 150lb RF, ASME B16.5, ASTM B564 UNS N06625)
- Gaskets...
Thanks for the feedback. Perhaps 'quantitative' is too strong a word. What I was looking for was something like a galvanic series with a given p.d. range relative to SCE for both SDSS and 316SS, allowing me to state something like 'p.d. < ~0.15v hence risk of corrosion low'... if that happened...
The fluid is produced water from a sour reservoir that has been through the standard water plant of multistage separation, hydrocyolones and skimmers and is now in-spec for overboarding. So yes -- high Cl content.
A full diameter gasket may be an option, but currently I'm looking to establish...
Hi All,
I have a 1" super duplex (ASTM A790) pipe that has had a 316 blind flange (150lb) installed. Piping spec calls for A182 Gr F55 to ASME B16.5, but for various reasons, this temporary solution was used. There has now been a request to extend this temporary solution to circa 1 year (mod...
