Head petrochemicals, atomic energy to the food and pharmaceutical industry equipment, pressure vessels and many other important parts missing is not available, the equipment used in a variety of containers, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment, head is a member of the container depending on the geometry, can be divided into spherical, oval, dish, of spherical, conical shell peace cover several.
According to head of different materials are: forging steel, carbon steel, stainless steel top closure
