Rally met with the Client’s project team for a unit walk-through to confirm the scope of replacement and look for opportunities to improve the design. After developing a 3D model, a constructability study was done to plan the extraction of the old vessel and installation of the new one with minimal disturbance to adjacent piping and structures. The area was laser scanned prior to design to ensure there would be no fit-up issues or clashes during the next plant turnaround. The new vessel saddles were designed to work with the existing anchor bolts, saving time during construction.
A material requisition (MR) was developed for the new vessel, with an updated data sheet, fabrication notes, and inspection details. Bids were evaluated, then post-award vendor documents were managed with the successful bidder.
Separate MRs were developed and issued for the new level and pressure instruments. The level gauge was upgraded to Hastelloy C-276 for improved corrosion protection.
CWPs were issued for the vessel replacement, adjacent piping modifications, new cables and cable trays, and instrumentation upgrades.