Team Stressman have been involved in the project since the very beginning, through several conceptual designs and final design.
Our responsibility was to verify the structural integrity of the piping and piping components of the Shah Deniz subsea manifold together with FMC Technologies. Subsea piping made of super duplex is exposed to hydrogen induced stress cracking (HISC). This complicates the pipe stress analyses, as in addition to checking it against ASME B31.8 Chapter VIII, all piping and components should also be checked against DNV-RP-F112.
Due to the high pressure of 900bar and HISC, all the piping components had to be specially designed and calculated with elastic-plastic FEA. The residual stresses from hydrostatic testing was taken into account.