Abstract: A unique nozzle [20] for a fluidized bed reactor is described that may be replaced efficiently. This employs a collar [30, 130, 230] attached to a vertical section [15] of a feed pipe [11] that provides fluidizing gases. The vertical section [15] has a plurality of nozzle openings [17] at its upper end. A nozzle cap [19] fits over the upper end of the vertical section [15] and the nozzle openings [17]. The collar [30, 130, 230] extends radially outward from the vertical section [15] at a location just below the nozzle cap [19] supporting it in its operational position. During replacement of the vertical section [15] and the nozzle cap [19], the collar acts as a guide to direct cutting equipment to the proper location and facilitate proper cuts. The collar [30, 130, 230] also acts as a support to hold the vertical section [15] and the nozzle cap [19] in proper position to facilitate welding.