The production technology of polyhedral composite pipes and sections (PCP) allows to produce them of any length.
Of course, the standard measures of PCP will make with some step, but nothing prevents to make required the length of the pipe to the customer.

Polyhedral composite sections (PCS) will be making based on the dimensions of the sewer collector in such a way that each ISS freely passes all the turns and irregularities which that it must pass through when installing in its place.