TDT license for manufacturing, fitting, modernizing and repairing of non-pressurised tanks and low-pressure tanks for toxic or corrosive materials, non-pressurised or low –pressure tanks for flammable liquids, appliances for filling and emptying of transport tanks.
TDT license for modernizing and repairingof distribution and technological pipelines for liquids and gases for toxic, corrosive or flammable materials, fixed tanks.