Best Pipe Material For Saltwater Service 1

Is salt water deaerated? What is the temperature?

The salt water is deareated and at ambient temperature. The saltwater is stored in a pond and then pumped to a salt dome cavern. The saltwater is pressured back to the pond when filling the cavern.

If the pressure is less than 150 psi, I would strongly consider FRP (epoxy, or vinyl ester) with butt and strap or mechanical joints (no socket/ adhesive bonded)

Low pressure, nominal temp., medium sized, I agree, use FRP. As much as I like metals they will be much more expensive and not give you a real advantage in this case.

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Corrosion never sleeps, but it can be managed.

Tell us the pressure and the diameter of pipes for real replies, but your best choice will certainly be plastic, either HDPE or ABS. I know of a salt mine who has many many miles of hdpe pipework for both underground transmission of supersaturated brine/mineral slurry and also for general use in a treatment plant.Cheers

The maximum pressure on the saltwater system is 100 psig. Piping sizes range from 6" to 12". Some of the piping will be new installation but the majority will be used to replace sections of carbon steel piping that begin leaking.

Rubber lined, polyethylene lined and concrete lined carbon steel pipe and FRP pipe have been used in this exact service. As costs vary with time, you should have your Purchasing department determine lowest costs today. We had a major problem with PE lined pipe, specified by the Corp., and I cannot recommend its use.

PE lined pipe is very different from pe pipe. any temperature variation creates high stresses where the lining is flared out at flanges, eventually causing failures.
Gibralter has very limited fresh water supplies and the entire island has two separate water distribution systems.
Firstly a fresh water supply for essential reasons.
Secondly, a seawater supply for where it is acceptable, such as toilet flushing, etc.
I wonder if any forum member knows what material is used.
Tomorrow I will research further. cheers dw