Failure of a Copper Condenser Dashpot
A copper condenser dashpot in a refrigeration plant failed prematurely. The dashpot was a long tubular component with a cup brazed at each end. Stereomicroscopic examination of the fracture surface at low magnification revealed a typical ductile mode of failure. The failure was attributed to insufficient component thickness, which made the dashpot unable to withstand internal operating pressure, and to extensive annealing in the heat-affected zones of the brazed joints. It was recommended that the condenser dashpot design take into account the annealing effects of brazing. Hydrostatic testing at a pressure times greater than the maximum operating pressure prior to placing the component in service was also suggested.
Rakesh Kaul, N.G. Muralidharan, N. Raghu, K.V. Kasiviswanathan, Baldev Raj, 1993. "Failure of a Copper Condenser Dashpot", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul
Download citation file: