Imported tube bodies split into two halves?

Hey everyone,

Apologies if this has been asked before in a different place, couldn't find anything on it.

Unfortunately I do not have access to featureworks.

When importing a STEP or IGES file, anything constructed of circular tube is split into two halves, I am looking for a way to fix this so that it each straight recognised as one body.

It is recognised as a solid and not a surface.

Many thanks if anyone has experience and can offer advice here.

SolidworksParts And Features