Hi,
In one of our projects, there is requirement of addition of one ESD valve on an oil line on an offshore platform. The client guidelines ask to 'perform stress analysis of the line for a change in weight because of extra valves, flanges, etc.'

Is it essential to do the analysis, as the additional valve is adequately supported so that the flexibility of the exisiting system is not disturbed, and the support details & types of the particular long line is very difficult to trace.

How can we convince the client that a comprehensive stress analysis is not required and the new valve is properly supported? Details of any stress analysis performed for the existing line is not available.