The program 'StuKre' is offered for free download and usage on this website.
The program StuKre is a utlity to design nozzles in the knuckle region of dished pressure vessel heads and was developed during two research projects. The final reports (about 1500 pages in german) can be obtained from the University of Karlsruhe, Lehrstuhl für Stahl- und Leichtmetallbau, D-76128 Karlsruhe, Germany. For a better understanding a publication (in german) is available, which was presented at the DECHEMA and the GVC in Frankfurt. The publication can be found here.
You find 'StuKre' here.
The Website is here.