The perfect function of pipes and vessels is an essential prerequisite
for the availability, capacity and security of the equipment in the c
hemistry and power engineering. The quality assurance of such pipe sys
tems demands careful analysis of the present state including nondestru
ctive testing and stress calculation by the help of FEM, lifetime pred
iction, and derived from this, specific maintenance. Modem CAD-softwar
e gives the possibility to store the results of visual control, of non
destructive testing and of strength calculation directly in the isomet
ry and otherwise retrieve the test result dates from the isometry. A p
owerful notebook for ultrasonic measurements was developed, to realize
all described actions under field conditions. Trends of corrosion mon
itoring by electric measurements, polarization resistance measurements
, acoustic emission and electrochemical noise measurements are discuss
ed.