CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
(OP)
Hi members:
Did anyone have any experience using the CS + Alloy 625 clad material for Chlorinated Seawater Injection Piping system above 30C?
Is there any industry standard or technical paper to refer to?
Thanks in advance.
Did anyone have any experience using the CS + Alloy 625 clad material for Chlorinated Seawater Injection Piping system above 30C?
Is there any industry standard or technical paper to refer to?
Thanks in advance.
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
https://bookstore.chlorineinstitute.org/mm5/mercha...;
It has been my experience that these systems are typically small diameter, (less than 2"NPS) and sometimes involve multiple injection points. Shedule 40S should be acceptable ...
That old Process chemical horse,.... C276 ......provides both internal and external corrosion protection.
MJCronin
Sr. Process Engineer
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
It usually does not cost much more than 625 and it has much better corrosion resistance in this environment.
There are many guides to handling seawater.
What part of the world is this?
https://www.nickelinstitute.org/media/3795/nickelp...
https://www.nickelinstitute.org/media/1724/materia...
https://www.nickelinstitute.org/media/1687/guideli...
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P.E. Metallurgy, Plymouth Tube
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
More information required ...
How much salinity or What type of seawater ? (low strength Baltic Ocean or high test Arabian Gulf ?)
Design temperature ?
What is the injection and Seawater Main Pipe diameter ?
Design flowrates ?
Will the seawater system have any periods of shutdown ? (you may want to consider some kind of purge)
MJCronin
Sr. Process Engineer
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
The piping system I mentioned above is located at the downstream of sodium hypochlorite injection.
GRP is not preferred due to the maximum velocity and pressure limitation.
The operating temperature is expected to be 35-45 degC, I just wondering the suitability of Alloy 625 in this application.
If referred the ISO 21457, it seems like C276 might be the best suit MOC.
Once again, thanks for all your kind recommendations.
Best regards,
KSoon.
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
https://www.azom.com/amp/article.aspx?ArticleID=12...
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
Yes Ti has great corrosion resistance, but ...
It is fairly low strength
It has a very low modulus (very flexible)
Field welding can be very difficult
And when you talking about large thickness parts it gets very expensive.
For very thin heat exchanger tubes and such it is fine.
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P.E. Metallurgy, Plymouth Tube
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
May I know the temperature limit specified at Table 10 of ISO 21457 still applicable for the piping system downstream of vacuum deaeretor tower (with dissolved oxygen of 10 ppb)?
Cheers.
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
If it is classed as "injection of deaerated sea water", table 7 is applicable. Although the controlled oxygen content(10 ppb) seems quite low but the oxygen content is to be monitored carefully, referring to clause 6.3.
On the other hand, if it is classed as "utility of sea water carrying system", table 10 is applicable. Based on my view, it does not mention any difference of material selection whether deaerated or not once it is chlorinated to kill bacteria.
Lee SiHyoung,
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: CS + Alloy 625 Clad for Chlorinated Seawater Injection Piping