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Life cycle analysis of non return valves

Horst, A. van der (2015) Life cycle analysis of non return valves.

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Embargo date:4 December 2025
Abstract:During my internship at Tata Steel in Port Talbot in South Wales I did an analysis on the non return valves (NRV) of the closed cooling circuit of the two blast furnaces based in Port Talbot. The blast furnaces produce molten iron under high temperatures. This closed cooling circuit contains soft water that cools the blast furnaces. A non return valve is a valve that lets water through in one direction but closes when water wants to flow back in the wrong direction. First an FMEA is done on the two types of NRVs used at Port Talbot, to determine the possible failure mechanisms and critical parts. The piping and instrumentation diagrams of the several water circuits are analysed to understand the water circuits and to list the total amount of NRVs. Thereafter the consequence of a failure of each NRV on the cooling of the blast furnace is determined. Also a factor for the detectability of a failure, extra costs, probability of a failure and probability of usage is determined for each NRV in the closed cooling circuits. These analyses were done to determine the most import NRVs. Also the way of transporting, storing, ordering, repairing, installing/replacing, maintaining/inspecting and monitoring of a NRV is analysed. After the analysis recommendations are given on the above topics and a maintenance plan is recommended.
Item Type:Internship Report (Master)
Tata Steel, United Kingdom
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Keywords:Life cycle analysis, blast furnace, non return valves, closed cooling circuit, maintenance plan
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