Welded section is given in 3D Autocad DWG drawing file. Steam lines should be arranged to fall in the direction of flow, at not less than 100 mm per 10 metres of pipe (1:100). Steam lines rising in the direction of flow should slope at not less than 250 mm per 10 metres of pipe (1:40). Thanks for downloading Autocad DWG and other CAD program files from our website.