Just remember that for combined load cases, root cases added or subtracted, the disp shown is relative to the other. For example OPE + WIND, the pipe may have moved -4mm X (OPE) then the wind blows the pipe to contact the opposite guide, thus will yield a 9mm X disp, but is still within the guides. Draw some pictures and look at what the load case actually is.
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Bob Zimmerman, P.E.
Vice President of The Piping Stress International Association (The PSI)