Nylon in sea water?

Question

dose nylon tube expand in sea water,.1 inch o/d x 3/4 i/d approx.

Answer 1

Nylon will degrade in UV light. This will weaken it and it may expand then if it is under any pressure.

Answer 2

Don't think so. It doesn't absorb water in its fibers unlike natural materials like hemp or abaca.

Answer 3

wouldn't have thought so.

This isn't for a "through hull" fitting on a boat I hope; I wouldn't trust nylon tubing for that sort of application.