Plastic Tubing in Saltwater System
Plastic Tubing in Saltwater System
(OP)
I am putting together a design spec for a saltwater system that includes plastic tubing and was wondering if there is any information on what the maximum flow velocities are for such tubing? The tubing within the system is teflon PFA, PEEK, and polyethylene varying in size from 1/16" to 1/4"; I have experience with metal piping in saltwater systems and know that piping like 90-10,70-30, and Ti have flow velocity limits to prevent excessive corrosion and erosion but is there a similar standard for plastic tubing?





RE: Plastic Tubing in Saltwater System
RE: Plastic Tubing in Saltwater System
In clean water Ti and SS have no limits.
Even in clean water the Cu based alloys have limits because of the relatively soft passive films that form.
This film will erode even without any particulate in the water.
Is this water chlorinated?
If we presume no chemical attack I would expect that you will hit pressure drop limits before you reach velocity limits.
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Plymouth Tube
RE: Plastic Tubing in Saltwater System
RE: Plastic Tubing in Saltwater System
"Mean peak flow velocity rose from 0.91 m/s at supine rest to 1.36 m/s during maximum supine exercise."
As these values sort of define an English unit range of 3.0-4.5 ft/s flow velocity range, isn't it at least just a little fascinating that God and/or more than hundreds of thousands of years of evoloution have developed a seemingly efficient pumped transport system with flow velocities seemingly not a whole lot different than recommendations of modern hydraulic Engineers?