Now-a-days I have seen that few organizations are following a practice which advocates that after normal static analysis is over , same model should be copied and run shall be taken with making friction multiplier as "zero". The logic put forward by these consultants is , once the system has stabilized w.r.t. pressure and temperature , there is no friction and hence the practice. This logic is not digestable , since making the friction zero will not simulate the phenomenon described by the advocates of these method. It will generate a displacement pattern where friction effect is zero, and not the one after the system has experienced friction and stabilized.
Also another logic is , that even if the system has stabilized after stable P & T , friction would still be present. In fact the equilibrium state is achieved because of friction as one factor . ASME code is not addressing this issue. I feel that this practice shall be discontinued as it does not stand the logic.