• Sujoy Subir Das

In this paper a case-study of a circular type universal bellows is done and the bellows is re-designed with several improvements in the existing bellows model which failed in short period within warranty period after it’s commissioning in the plant. The bellows is used in the furnace ash drain line where the working temperature is about 920˚C and the pressure inside the bellows is 1090-1122 mmWC (mm of water column) due to which there is an appreciable amount of thermal expansion of the bellows material. In the existing model of universal expansion joint due to various reasons viz. inappropriate overall length, absence of vent holes, inappropriate lateral movement consideration, wrong selection of design parameters etc. it failed from the bellows convolution section during operation within couple of weeks after it was installed which is a lot early than its’ proposed/rated life cycle period.

Bellows, Universal Expansion joint, Convolutions, Spring-rate, SA240 Gr.321/310/304.

"A Case-Study of Design of Circular Type Universal Bellows", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 6, page no.b333-b340, June-2021, Available :http://www.jetir.org/papers/JETIR2106182.pdf

"A Case-Study of Design of Circular Type Universal Bellows", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 6, page no. ppb333-b340, June-2021, Available at : http://www.jetir.org/papers/JETIR2106182.pdf