First offset Plane at Z direction at 150mm
Draw the Pipe Profile as shown in above image
Draw the Pipe path as shown in above image
Draw the sketch on Pipe Face
Extrude the sketch to 50mm
Draw the above sketch on other face of Pipe.
Give the Pad distance to 50mm
Give fillet to all Corners.
Draw the Sketch for Hole.
Make the same type of hole on other side of flange.
and here our model is completed and at last give chamfer of 10mm on both the opening of pipe.
Posted from my Blog Mechnexus.com with Exxp: Model Pipe with Flange in FreeCAD
