This is the second part of a series of technical papers comparing Stamicarbon and Saipem Urea Stripping Technologies as per today (May 2017). This part focuses on the applied materials of construction and typical failure modes of its latest references. Mr. Friedrich Wöhler discovered in the 18th century that it was possible to make from NH3 and CO2 Urea. In the 1930’s, Mr Carl Bosch working for BASF developed the urea process in such a way that it became possible to produce on a commercial scale urea. Then BASF in Germany build a plant producing 40.000 tons of urea per year; at that time the urea synthesis took place in an autoclave. This autoclave was originally a naval gun that was modified into an autoclave and as alloy of protection the inside of the autoclave was lead lined. Until the 1950’s, small-scale urea plants were in operation.