×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

316L S.Steel flow sensor on seawater filled Copper Nickel pipe

316L S.Steel flow sensor on seawater filled Copper Nickel pipe

316L S.Steel flow sensor on seawater filled Copper Nickel pipe

(OP)
Hi everyone,
I have a corrosion related question..
In our Yacht project, we have been supplied by our HVAC subcontractor with a set of:
ifm SI5000, flow sensors.
These sensors will be mounted on CuNiFer pipes and measure the sea water flow.
I am concerned about the fact that the sensor (316L) will be screwed in a CuNiFe nipple on the sea water pipe and the threads will be subject of galvanic corrosion (Stainless Steel + Copper Nickel + Sea water).
Can you please advise, would a electric isulation of the two threads will be enough?

Thanks

RE: 316L S.Steel flow sensor on seawater filled Copper Nickel pipe

You do need full isolation, and don't expect the 316 to last too long even with good isolation.
The 316 will be susceptible to bio-fouling and corrosion.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: 316L S.Steel flow sensor on seawater filled Copper Nickel pipe

If I remember correctly the SS316 may be cathodic with respect to the larger anodic area of the CuNiFer piping. I.e. The piping will try to protect the SS316 sensors?

However, also agree with Edstainless, best to avoid 316 for marine applications. We have had serious problems with pitting corrosion of SS316 on our project in the gulf. Warm water + high salinity.

RE: 316L S.Steel flow sensor on seawater filled Copper Nickel pipe

(OP)
Thank's for the tips guys.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources