Cast iron waste pipe.

I'd suggest it is

Denso Tape For protection below ground or underwater against corrosion on pipework, metal surfaces and cables, and temporary sealing of fractured mains and cable joints. A highly versatile corrosion prevention tape that is non-hardening, non-cracking and conformable over a wide temperature range.


or similar


Regards


BOD

Unless the "woven mesh material" has a an asbestos base and you're thinking of cutting through it...


I might suspect something like "denso tape" (applied to prevent corrosion) but all sorts of things might have been used in years gone by (hence the above comment).


   - Andy.

This is my worry.

If in doubt then get it sampled by a specialist asbestos contractor. In the mean time treat it as asbestos.

If it is Denso Tape it could be concealing a crack and a leak.


I would try and get a clamp on above it, as that section is insulated by the tape anyway; and I would not want to risk opening up a leak.


If in doubt, don’t.


Andy B.

Thanks all for the replies. I don't think it's denso tape as the weave looks a lot finer than the tape I'm familiar with on buried earth rod connections and is very even as if one thin layer on the iron.

Any possibility it’s spun asbestos cement pipe with collars that looks like cast iron?

Back when I was not so Ancient, many ships had pipework that had been repaired with a Thistlebond bandage. Wearing gloves, you wrapped the supplied bandage around the cracked pipe after coating with the epoxy resin type goo, dabbing on more goo as you wound it on. The goo, dried to a translucent lager beer colour. 


This seems to be the 21st century version. Probably too many ships engineers are still stuck to the pipes for not wearing gloves with the really sticky stuff...

https://thistlebondmarine.com/products/ups-19601-3-4-5-pr-thistlebond-pipe-repair-bandages

Clive

There are/were a number of fibreglass & resin mixes used for repair or corrosion proofing.that set hard, as well as at least one that remains sticky like fly paper for years  - supposedly to allow settlement, but also to ruin perfectly good trousers.

PS, if it does not conduct, surely no need to connect at that point - it cannot be touched. Move along till you reach bare metal, or a coating you recognise.

Mike.

There is a good chance that this pipe was once in the ground and the basement excavated to reveal it and is now simple supported in place. There is one joint consisting of one pipe having a belled end to form a socket and the joining length pushed into it. The pipe pipe looks a lot thicker than you would traditionally see on the side of a building.