Loadfactor for internal pressure can be higher according to NEN3650

[ir KW Radder]

You are right that Ple4Win has a fixed facctor 1.25 for the internal pressure only (BC2), while NEN 3650-2:2003 mentions some different factors. For instance 1.1 for the maximum incidental pressure (MIP) and 1.5/1.1 for pipelines in stations as you state.
The factor 1.25 has been chosen because it is the experience that the overwhelming majority of pipeline projects concerns pipelines outside stations. Nevertheless we deem it desirable to create the possibility to specify a factor different from 1.25.

The most suitable location is the input table LOCASE. By adding rows (and columns) to the table it becomes possible to specify sections of the pipeline to be situated at a station and other sections to be outside the station area.

This addition to Ple4Win is planned to be realised in one of the following versions.