While I suspect such pipes have been encased in areas and for some applications, I have also noticed some authorities reportedly prohibit or have special requirements concerning plastic pipes encased or embedded in, and/or transitioning to some concrete (e.g. see under heading “System Application and Material Usage” at
, that includes in the opening paragraph, “Polyethylene (PE) is not approved for indoor use or for encasement in concrete slabs.”. See also e.g. points made at
and
etc.
Furthermore, if it is critical that there be an axial leak-proof transition between the outside of the plastic pipe and encasement, e.g. passing through a concrete structure wall etc. (this would not appear to be the case in your application), this sort of application apparently needs to be very carefully considered (as the plastic apparently does not bond with the concrete in the same fashion as a metal wall pipe, and or the transition is more susceptible to thermal and other movements, sliding, seal disturbance etc.?) See e.g. the mention/explanation in “…Related Art” (prior art etc.) at
.
I guess you could contact these authorities as to their experience(s) that result(s) in such concerns/prohibitions.
On the other hand, I know at least one manufacturer of at least plastic composite pipes actually advertised in their roll-out of an allegedly “wear” etc. -resistant piping system a few years ago at
a few years ago, "The chemical and corrosion-resistant plastic outer wall makes composite pipe ideally suited for concrete encasement and direct burial below grade.” (however, I’m not sure that the applications of such piping system were really without any problems thereafter).
