Abstract: A hanger system particularly for cyclone collectors in a fluidized particle process vessel, such as a fluid catalytic cracker regenerator vessel, wherein a vertical supporting member is pinned at one end to a cyclone wall lug and at the other through a slot in a vessel depending lug so that thermal and mechanical stresses within the overall assembly are compensated for by sliding movement of the pin in the slot, which movement is controlled by a stabilizing linkage member attached to the pin at one end and pivotably attached at the other end to the vessel.