How to indicate fiber direction for orthotropic material with Feap?

I am using Feap 7.5 to test a pipe (subjects to internal pressure) that has different mechanical property in radial direction (0R), circumferential direction (0T) and longitudinal direction (0Z). Originally, mechanical properties are given according to the (0R,0T,0Z) axes. I was required to use the hexahedral element (brick) to simulate this problem. Could you show me how to use the mechanical properties according to the (0R,0T,0Z) axes in the global axes (0X,0Y,0Z).

Thank you in advance.

NH NGUYEN.