Sanitary installations, water supply and sanitation equipment, in particular pipes (parts of sanitary installations); burners, boilers and heaters, in particular boiler pipes (tubes) for heating installations and coils (being part of distilling, heating or cooling installations); refrigerating and freezing equipment, in particular coils (being part of cooling installations); industrial treatment installations namely filters for gas extractors and industrial air purifiers, industrial installations for filtering liquids, separators for the cleaning and purification of gases, installations for cooling liquids, industrial ovens and furnaces (not for food and beverages), in particular flare stacks for use in oil refineries; parts and accessories for all before mentioned goods, included in this class