Copper pipe identification

[Tōtōchtin]

Hello, I ran across this ad that states the 3 inch pipe was used in electrical. I can't imagine any electrician using it as conduit. I asked what it was his relpy "It is electrolytic electrical use is known as sps or ips is 99.9% copper I await your comments. ". Any ideas
I also bought a wide 30 and 59 lt kegs for a little less then 70 bucks.
Stay safe, and thanks
JK
https://articulo.mercadolibre.com.mx/ML ... 2e8f2820a6