Equipment and supplies Design and construction 6 Fluid dynamics 3 Heat 3 Air conditioning 2 Boilers 2 Chemical engineering 2 more ... Chemical plants 2 Chemical process control 2 Chemical processes 2 Combustion 2 Condensers (Steam) 2 Data processing 2 Environmental aspects 2 Environmental engineering 2 Heat exchangers 2 Heating 2 Maintenance and repair 2 Materials 2 Petroleum pipelines 2 Photocatalysis 2 Pipelines 2 Piping 2 Plumbing 2 Pumping machinery 2 Purification 2 Refrigeration and refrigerating machinery 2 Sanitary engineering 2 Steam 2 Steam engineering 2 less ...