Pipe cutting apparatus

A pipe cutting apparatus, comprising:

• a rigid annular frame adapted to be coupled to a pipe to be cut;
• a cutting means for cutting said pipe being removably mounted on with said annular frame;
• and
• a movement means adapted to move said cutting means with respect to said annular frame about an axis of revolution configured to coincide with the longitudinal axis of said pipe,
• wherein:
• said annular frame comprises at least one annular rail which comprises two or more rail members shaped as an annular sector, said rail members being connectable to each other by mating means so as not to break the continuity of the profile of said annular rail and maintain the lateral alignment of said rail members;
• said cutting means comprises a carriage that is slidingly and removably associated with said annular rail, said carriage having engagement members selectively engageable with said annular rail;
• said engagement members comprise at least one pair of pins rotatably mounted on said carriage about second axes of rotation which are parallel to said axis of revolution;
• said pins being adapted to engage a second cylindrical edge of said annular rail;
• and
• said pins are accommodated in respective seats formed on supporting members slidingly mounted on said carriage, said pins being rotatable about respective ones of said second axes of rotation and being able to slide selectively along or parallel to the respective ones of said second axes of rotation.