Flexible silicone hose

[robwizard]

I was wondering if anyone could offer some advice? I'm trying to figure out a way of routing/protecting some hull mounted cables and am struggling to find anything suitable. I've attached a rough drawing demonstrating what I'm hoping to achieve. My first thoughts were the flexible silicone hoses used in the automotive world? They're plenty strong enough to resist the crushing from the clamps and also should be resistant to long exposure to saltwater (according to the manufacturer) but the reinforcement wire is galvanised steel and I'm worried it will turn to dust pretty quickly if either end becomes exposed..

Any thoughts on the general idea would be well recieved, as would suggestions regarding the hose. At the moment I can't see that I could use a fixed bend tube out of stainless or anything as I'm not sure of the bend radius of the cables nor where they enter the hull

Cheers

 

[Mikey D]

You can get silicone hose with out reinforcement , I used to use in in the dairy industry , would obviously be squashed if u used a u bolt as per your drawing ...

 

[cheb]

Spiral wound suction hose maybe? Frequently available as offcuts too IME.

 

[ibrooks]

You can get silicone hose with out reinforcement , I used to use in in the dairy industry , would obviously be squashed if u used a u bolt as per your drawing ...

Or you could combine non-reinforced hose with inserts in the ends like they use in nylon pipes that are going to be connected with jubilee clips - obviously they tend to be in the order of 6-10mm diameter but no reason they couln't be scaled up to support the ends of the pipe from being crushed.

 

[8ob]

Custom made hoses are cheap, maybe a custom made hose with no wire and just some stainless inserts pushed up the pipe where the clamps go. The last ones I had made were about £25 each.

Bob

 

[500e]

Short length of Stainless pipe in the ends with a SS spiral (open spring to keep tube form)could TIG spring ends to tube
https://www.leespring.com/compression_spec.asp for example
Why the U bolt fixing Jubilee clips will seal better on that style of tube, a formed bracket between J clip & pipe then pop the bracket to the base or even weld bracket to J clip

 

[daedalusminos]

How about stainless tube or does it need to be able to flex?

 

[bs2236]

Marine water cooled exhaust hose would be good, flexible and reinforced with a stainless wire. I have used it to route Morse cables and engine wiring harnesses a good few times. Cheap enough by the meter

 

[robwizard]

Thanks for all the replies. In response to some of the questions/suggestions;
It doesn't need to flex, but I'm unable to attend the fitting/fabrication when the vessel is in the drydock. So I figured if I can supply the fabricator with the lengths of hose, clips and any other bits and bobs he might need then that would be better than trying to guess at the bend radius or any other fixed points. I've had a look at a few exhaust hoses and oddly enough most of them either say they have a spring steel winding or don't specifiy what the winding is made from.

I think that regardless of what we end up using the idea of having inserts in the ends of the pipes to prevent crushing etc is a good one and I'll be sure to include that. That would also increase the amount of viable tube options..

 

[8ob]

Why not use flexible stainless exhaust tubing? Just thoughts. https://www.ebay.co.uk/itm/2-52mm-x...=item418555dfc5:g:gAkAAMXQDnpTX6J9:rk:12:pf:0

Bob

 

[Screwdriver]

If it's just to protect cables, why not use regular hose? High pressure air hose is thick enough to allow clamping and you could slip a length over each cable if the ID is too small for them all to go down a single length.

 

[daedalusminos]

Or you could go for corrugated stainless tube

@Bob posted what I had in mind

 

[dobbslc]

What about flexible plastic Kopex used for electrical cables?
Or plastic ducting,
RS PRO PVC 5m Long Green Flexible Ducting Reinforced, 143mm Bend Radius , Applications Various | RS Pro https://uk.rs-online.com/mobile/p/p...VC7DtCh2TgwIBEAQYCCABEgJed_D_BwE&gclsrc=aw.ds

 

[500e]

I think @bs2236 may be the easiest idea flexible sea water resistant + heat