Abstract: A vessel for use in a refrigeration system. The vessel includes a vessel body and at least one end wall for closing the vessel body, the end wall having a threaded receptacle. The threaded receptacle is configured to accept a threaded fitting and the threaded receptacle includes: an annular sealing surface for engaging a corresponding surface of the fitting, the sealing surface formed on a first side of the end wall; and a threaded surface defined by an inside wall of an annular protrusion, the annular protrusion having a longitudinal axis disposed generally perpendicular to the sealing surface, and wherein the protrusion extends longitudinally from a second side of the end wall toward an interior of the vessel body.

Abstract: A vessel (50) having a cylindrical wall (52) and an end wall (54). The cylindrical wall (52) includes an edge portion (58), a radially inward shoulder portion (60), and a capture portion (62) therebetween. The end wall (54) is interference-fit in the capture portion (62) with the shoulder portion (60) forming a positive stop therefore and the edge portion (58) being turned radially inward thereover. An inlet/outlet fitting (70) extends through an appropriately-sized opening in the end wall (54) and is secured thereto by, for example, a lip (72) and a weld (74). The vessel (50) can be incorporated into the construction of refrigeration components wherein compressor-generated vibration causes stress concentration concerns for inlet/outlet interfaces on the end wall (54).