In reply to vscott:
> As far as I'm aware there's no separate rating for a dynamic walking/alpine/glacier rope (others may know better),
You are correct. The standards are:
EN 892:2012 + A1:2016 - Mountaineering equipment - Dynamic Mountaineering Ropes
UIAA 101 - Dynamic Ropes
If they are a dynamic rope they there will conform to one (EN)/both standards if they are on the market in the EU.
> so they generally have half and/or twin rope test ratings e.g. the decathlon one has both, beal 8mm rando rope is twin rated, and may indeed in some cases be short lengths of half/twin ropes rebranded. In short, I've happily used a decathlon rando rope for ski touring and easy alpine routes/scrambles including abseils and its worked perfectly well.
The one thing I would bear in mind is that on a rock ridge, the thing that will cause your rope to fail is it getting cut over a sharp edge.
> As an aside, there's now a move towards lighter and skinnier still dyneema ropes for ski touring usage - these are less much dynamic and seem designed for non-fall holding situations e.g. only abseils/crevasse rescue, though there is I think an edelrid version which is tested to hold a small falls. They are however much pricier than dynamic rando ropes.
These (both the Petzl RAD and Edelrid Rap Line) are tested to/sold under different standards:
EN 564 - Mountaineering equipment - Accessory Cord
UIAA 102 - Accessory Cord
There is NO dynamic element to these standards, there are a static pull test only. They are for "Accessory cord or rope with a core and sheath construction with a nominal diameter of 4 mm to 8 mm for force absorption and not energy absorption".