Torque settings for jubilee clips

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millsn
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Torque settings for jubilee clips
At my place of work we recently received a mandate to do up hose clips on silicon hoses to a given torque setting and then 1/2 an hour later to repeat the exercise ostensibly due to leaks in use. Now I find this difficult to understand. Can anyone advise whether silicon hoses are treated in some special fashion or whether someone somewhere in house is being a bit of a plank?
Stationary M25 ...
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I normally run a socket over all hose clips when I remove the bonnet. Invariably find they all tighten a little more - every time. Same with silicone or standard rubber hoses.
Jonathan Kay
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I'm not an expert on this. Whenever tightening silicone hoses comes up on BC: * Some people have no problems with leaks, others do * People extol band-type clips over those with line or thread contact * Lubrication is thought to be a good thing I don't think I've ever seen quantitative torque settings specified. Jonathan
Sheds Moderator
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It's a tough one as you are compressing the silicone hose, not stretching the bolt in the usual fashion. As such they don't load up as you would expect. I do remember in my youth doing up a Spitfire steering rack U clamp - it had rubber mountings and didn't tighten up as I expected, so before I got to what I thought was an acceptable torque the bolt sheared. I'd be very wary of being too ambitious with a jubilee clip for the same reason.
Jonathan Kay
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Just had a look at the Jubilee web site. They do specify torque settings but I have no idea how they compare to what feels right by hand. Jonathan Edited by - Jonathan Kay on 7 Jan 2012 15:19:48
millsn
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I reckon you could do up the hoseclip ad infinitum. I also suspect that any lack of sealing is down to the joint/flaring/diameter of the hose versus pipe and little to do with the ultimate torque on the fastener