Doina Engineering has the expertise and renowned performance to provide the following. Oil, Gas & Petrochemical Pressure Vessels to all codes and material grades. Pipe Spooling in all material grades. Construction Structural steel erection. oil/ petrochemical mining and processing commercial Pipe Spooling in all material grades. process and pipelines on plot and off plot Mechanical equipment installation and commissioning. Mining & Mineral Processing Structural steel, medium and heavy structures. Belt and pan apron feeders. Vibratory screen equipment. Conveyor systems. Plate chutes. Storage vessels and silos. Stackers and reclaimers.