An in-line venturi orifice trap (10) in which a condensate flow path (26) defined by the venturi is at an oblique angle with respect to the axis (18) of a pipeline in which the trap is to be mounted. With this configuration, the orifice (30) may be accessible (e.g. through a port (36) formed in a side wall of the trap or pipeline) without requiring removal of the steam trap from the pipeline.