Device for connecting a pump body to a pipe of a hydraulic system

1. A combination of a pump having a pump body and a pipe of a hydraulic system, comprising a connecting device which connects said pump body to said pipe, said connecting device comprising a planar flange having a thread on an inside diameter of said planar flange for coupling of said planar flange to a tubular intake portion or delivery portion of said pump body, said tubular intake portion or delivery portion being threaded complementarily to said thread of said planar flange on an outside diameter of said tubular intake portion or delivery portion of said pump body, said planar flange having two mutually opposed completely planar surfaces without protuberances extending perpendicularly to said planar surfaces, said thread extending on said inside diameter of said planar flange entirely between said opposed planar surfaces of said planar flange, said planar flange comprising at least one connecting portion which connects to an end flange of said pipe, said at least one connecting portion of said planar flange and said end flange of said pipe each having at least one hole that is crossed by a screw for tightening said planar flange to said end flange of said pipe and thereby connecting said pump body to said pipe, wherein a planar surface of said end flange abuts one of said two mutually opposed completely planar surfaces of said planar flange.

2. The combination according to claim 1 , said planar flange comprising two said connecting portions that protrude outward in diametrically opposite positions.