Talurit / swage update

sarabande

sarabande

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I wasn't happy with the data I posted earlier when a question was asked about Talurit swages and their reduction in wire rope breaking strain.

I've been in contact with HQ in Sweden, and they put me in touch with the UK manager very quickly. (Good work, Talurit.
bit of a puff for their good efforts http://www.talurit.com/)

What surprised me was the variety of devices they now have for joining rope / wire for not only nautical activities, but general lifting slings, and architectural stuff, too.

There's a new European standard (EN 13411) which says (very basically) it's not possible to predict the breaking strain of swaged fittings becasue of the variation in the way that wire ropes and slings are used. The do say that if theswaging equipment and the operator are maintained and trained properly (you know what I mean !) then some predictions can be made for the way that the swage reduces the breaking load.

The UK Talurit manager emailed me this pm:


"SWL is 5:1 Breaking Load of wire rope (Straight Lifts)
If verifying tests are done on TALURIT sling SWL x 2

SWL is 3:1 Breaking Load of wire rope (pulling)

Whatever the wire rope certificate states please divide by 5.

If the sling is being used for an other purpose, (not lifting), I would try to keep at a minimum of 3:1."

I am not a customer, but I think they have been very helpful in showing the difference between safe working load, and breaking load.
 
We are about to replace all our 6 and 7mm talurited rigging with new 1x19 with swaged ends.

The reason is that we are not sure of its age and some is 'stranding' in places, especially at the back of the talurite itself. But most importantly, after a bit of bouncing around, we have started to find bits of the talurit thimbles scattered around on deck which is a bit concerning! On examination, almost all thimbles are cracked and some disintegrating. I suspect this is because the nature of the boat (Wharram cat) means there is a lot of flexing in the whole system which puts occasional big shock loads on the rig. Once the thimbles start to break up I am very uneasy about the strength of the wire loop. I hope the swages will perform better, but maybe they will jut conceal the underlying problem until something gives!
 
Jimmy Green Marine and a succession of helpful travelers. Helped by KLM/KQ who have moved to a 'piece' concept for baggage which means a 40Kg allowance per person spread across two bags!

(I enjoy the chaos and total lack of regulation here, but it means I would not trust any 'local' source of parts or labour for such a critical application. I bought a wire towrope in Nairobi in a smart looking package with talurit-like loops in the end. 1st time it was needed, the loops just puled through before the car moved a mm!)
 
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