E.J.W. van der Stok, F.L. Scholten, L.G.P. Dalmolen
Papers # 2010 Vancouver
A mathematical model was set up to assess the equilibrium gas pressure in the annulus of the reinforcement layer of an RTP pipe. This is done by using the theory of gas permeation, ruled by Fick's Law and the theory for a temperature gradient over the pipe wall, ruled by Fourier's law. The model allows calculating the influence of different liner pipe materials and temperature gradients inside the multilayer pipe on this parameter. The equilibrium gas pressure in the annulus was compared with the cover blow-off threshold pressure of a commercial RTP pipe. Changing the liner pipe material would result in a limiting factor of the maximum allowable operating pressure of the RTP system itself and not the cover blow-off resistance.