Generally, the subject matter disclosed herein relates to length-adjustable pressure- retaining components used in piping systems. In one illustrative embodiment, a device (10) comprising a first pressure component (1) and an adjustable spacer ring (2) operatively coupled to the first pressure component (1) is disclosed, wherein the adjustable spacer ring (2) is adapted to adjust a combined overall length of said the pressure component and the adjustable spacer ring (2).