Author : Devendra P Goswami, Dhiraj Aggarwal and VD Bharani

Intent of this paper is to understand the phenomenon and impact of Steam hammer in Steam Piping Systems due to sudden closure of valves using Time history analysis method. Steam hammer in piping system is a phenomenon where unbalanced forces are developed due to sudden closure of valve in the piping systems. In a steam piping, when steam flow is suddenly stopped or condensed, then it results in gaseous shock wave, which are thermal shock wave resulting in to steam hammering. If system is not designed these unbalanced forces, it can result in failure of supports, supporting structure, overloading of equipment nozzles, overstress causing cracks in pipes and fittings. Steam hammer consideration helps in ensuring the safety by eliminating the overloading / overstress in piping systems / connected equipment nozzles and supporting elements, thereby preventing practical damage to the facility.

Keywords: Steam Hammer, Time History, Steam line, Caesar II, Sonic Velocity Super-heated Steam etc

Article published in International Journal of Current Engineering and Technology, Vol.8, No.5 (Sept/Oct 2018)