The programs calcvac/vacline can calculate longitudinal one-dimensional pressure
profiles in vacuum pipes. The pipes can consist of different sections of
different shape and material. Outgasing of several different gas species can be
simulated. Also it is possible to install vacuum pumps of different types. 
Also cryo effects (cold pipes and cryogenic pumps) are simulated. 
Finally the pipes can be linked together to form a network.
