Rally met with the plant operators and project leads in the unit to walk down the scope of work and identify potential tie points. Special emphasis was placed on ensuring that the new jump-over valves would be quickly accessible from existing platforms in the event of a compressor trip.
At the Client’s request, the installation of new flanges was kept to an absolute minimum. This eliminated potential hydrogen leak-points.
Low-temperature carbon steel materials were used for the new piping, acknowledging that the uninsulated jump-over line could be pressed into service without a warm-up at any time of the year.
Rally provided detailed engineering services, culminating in a multi-discipline construction work package (CWP). It included details for making piping tie-ins during the next unit outage, constructing the hydrogen jump-over line between the tie-ins, and adding structural steel pipe supports.
Rally revised the plant piping & instrumentation diagrams (P&IDs) and facilitated a process hazard analysis (PHA). This ensured that any new risks of misdirected flow were understood and safely mitigated.