Your answer depends on the diamond mine you reference. Most diamond mines are owned by different companies.

For example, in Canada, from their Wikipedia page:

"The mine is owned by a joint venture between the Rio Tinto and Dominion Diamond Corporation, and is operated by Diavik Diamond Mines Inc., a subsidiary of Rio Tinto Group."

In Australia, the Argyle Mine is owned by the Rio Tinto Group.

In Russia, the Udachnaya pipe is owned by Alrosa.

In Africa, The (Botswana) Orapa diamond mine is owned by Debswana.

Pvc pipes/ hd pvc/teraine pipe/polythine pipe/copper pipe/gi pipe/stowne wear pipe/asbestos pipe/cpvc pipe/ ppr pipe/ flexiable pipe/

The answer will depend on whether it is a 2 inch pipe or a 2 cm pipe or a 2 foot pipe or whatever.

The answer will depend on whether it is a 2 inch pipe or a 2 cm pipe or a 2 foot pipe or whatever.

The answer will depend on whether it is a 2 inch pipe or a 2 cm pipe or a 2 foot pipe or whatever.

The answer will depend on whether it is a 2 inch pipe or a 2 cm pipe or a 2 foot pipe or whatever.

Copper pipe is soldered. Steel pipe is welded. Plastic pipe (pvc) is glued. There is even a type of pipe that is smoked...

Pipe life is how long a pipe lives.