Argthtjtr

Several offshore sailors are considering the use of specific Chinese locking carabiners with personal tethers, to keep us attached in violent conditions. Specifically...
https://www.ebay.co.uk/itm/Outdoor-Rock-Climbing-Auto-Locking-Carabiner-Clip-25KN-Safe-Buckle-Hook-Clip-/253765494839

Is anything known about the QA of these items and the reliability of their CE/UIAA labeling?

This item might be identical to a certified one, but the seller is clearly not aware of certifications, so you should assume it is not certified - in short:

Do not use this carabiner for safety-relevant applications.

The description on ebay says

• The ultimate tension: 25KN


• CE Certification

"ultimate tension" is not a term used to describe carabiners strength by any manufacturer I know. In addition, with carabiners you usually get numbers for major axis, minor axis and open gate strength.

CE certification is not a safety norm like EN/UIAA. The image features an EN cert, the text does not mention an EN cert. Googling the seller "STRADE FAREAST LIMITED" does not bring up anything relevant either. There are way too many red flags here for safety relevant gear.

Another red flag, as identified by @Pont, is the displayed norm: EN 362:2004. That's the norm for industrial equipment, while the description on ebay is geared towards "Outdoor Rock Climbing".

The main issue is that fraud and misrepresentation is rife in the chinese manufacturing sector.

When I was working in outdoors retail, I saw a couple press releases where Petzl was facing counterfeiting from China. The copies were visually identical, down to the packaging and tags. Of course, when tested, they failed at significantly lower forces than what the specs said. These date back from 2011:

I personally wouldn't trust equipment that doesn't have a reputable manufacturer behind it, unless there was a way to verify that independent testing and/or official certification proof is available to the public. Having any certification stamp on the part means nothing if the manufacturer is shady as it's been proven that some certifications have been faked in the past.

I did do a quick google search, the alibaba listing for mass-market seems to imply that the manufacturer is somewhat certified. Now it's up to you to check if this is true or not as that particular certification isn't very helpful for consumers trying to detect frauds. Furthermore, as noted by @JonCuster, the CE certificate is for a different item, which makes this pretty much non-applicable anyway and super shady.

These look like the Carabiners frequently used on Via Ferrata climbing kits. See for example these images on google.

I am certain that you can find such carabiners from respectable brands with a known history of high quality gear that fulfils all the needed standards. They might be a little bit more expensive.

In light of this I would say:

• If you have to even ask then it's probably safer to just avoid buying crucial and potentially life-saving equipment from unknown Chinese manufacturers.


• Buy a similar product from a known, respectable climbing gear manufacturer.

That being said, the linked product from E-Bay quite likely is up to standards and will perfectly hold up to the claimed load limits. But personally I'd rather not bet my life on it, especially not to save a measly 10 bucks.

Edit: Found some being sold in the Salewa Shop, I'm sure there are plenty of others.