A dividing wall column combines the process of two columns into one shell.  Refineries are adopting this modern technology to process finer fractions without needing an additional column, reducing energy consumption by around 30%.

Recently our talented welders and fabricators demonstrated great precision and accuracy installing a dividing wall column on a Merox unit and aromatics unit at the world’s largest refinery in western India.

This critical job involved heavy revamping activity, including considerable hot work inside a confined space.  We removed the original 40 trays and replaced them with 57 new trays, along with tray support ring modifications and chimney tray welding.  It also required welding 23 nozzles and 93 cleats on live equipment.

We are excited to expand our expertise into this niche market to provide more opportunities for refineries and petrochemical plants to improve the efficiency of separating products whilst freeing up a column that can be used in another part of the process.


We are experienced at providing comprehensive revamp and construction projects and, together with our technical partners, can support clients with all aspects covering engineering, fabrication, construction, commissioning and project management. Often these projects coincide with planned shutdowns and turnarounds, which we can undertake in addition to the revamp, improving safety, eliminating interface issues and minimising cost.