G.M.J. Stålmontage AB is a provider of products and services such as oil storage plant design and installation engineers,petroleum storage plant design, installation and maintenance,oil storage tanks, high pressure,oil storage tanks, floating roof,oil storage tank venting equipment,vapourspheres,oil loading plant and equipment,pipeline cleaning equipment and accessories, petroleum industry,oil tank cleaning equipment,recovery equipment, oil from oil tank sludge,vapour recovery plant from oil storage tanks,mixers for storage tanks, petroleum refinery products.