seawater piping

[mathew1]

I am looking for alternative piping material other than 90-10 or 70-30 Copper-Nickel piping to install in the marine environment. My basic point is to reduce the amount of Copper entering the environment. Any help on this would be greately appreciated.

 

[Metalguy]

A stainless with approx. 6% Mo does very well. If you can avoid stagnant conditions and are at ambient temp. you could even use 304L or 316L ss, but you may get pitting if you can't be assured that stagnant times will be short.

 

[jay165]

We use Fiberbond or Bondstrand as an alternative to Cu-Ni. They can handle up to 300 psig. If your pressure is not too high You can use fibreglass, PVC, ABS, etc.

 

[keyardee]

Hi Mathew1
I am not aware of your actual application.But if the initial cost is not a problem, then Titanium pipes will be the the ideal and ultimate.They don't conaminate nor get corroded.They are strong too. Well try them.

 

[kcmisra]

Agree with keyardee. Titanium is the best option for seawater piping from the point of corrosion and avoiding Copper carryover and excellent strength to weight ratio. However Titanium welding would be a factor to consider as it requires special cleaning and atmospheric conditions.

 

[mgp]

You can get lots of tips by looking at existing threads.
Search the eng-tips with keyword "Seawater"

Here's twop of them:

thread378-18334

thread177-2240

Or try even the
Saltwater corrosion engineering Forum forum307

regards
Mogens

 

[stanier]

Try Zeron 100. A duplex stainless steel.

 

[mathew1]

Thanks for the great information everyone has offered.