Support pipe Support pipe Ouahmed (Mechanical) (OP) 20 May 17 11:02 I'm modeling in pipeline using AFT impulse and i want to know the difference between support "anchored upstream" , "anchored throughtout" and "with expansion joints". RE: Support pipe BigInch (Petroleum) 21 May 17 09:41 Surge pressure varies depending on how rigid the pipe is held in place. For now select anchored throughout. Technology is stealing American jobs. Stop H1-Bs for robots.