We prepared design covering summery of particular components, sizes and technical details, for flange connection of plastic pipes D125 and both types of metal pipes DN100. Among documents to download you will find as well summery of pressure loss for particular temperatures.
It is recommended to check also document summing up all these quidelines of a successful assembly of insulation. Also, you will find list of recommended thickness of insulation according to International standards. Do not miss the chapter related to advantages of proper insulation with interior water distribution systems. Higher lige expectancy and lower temperature loss (even by 80%) you will find just at the beginning of the list. At your disposal is also technical manuals in detail.