To achieve controlled cooling of ribbed bars cooling nozzles  and cooling tube lengths are set for each range of bar diameters, as per rolling speed. Each cooling element consists of one tubular external shell with water and compressed air nozzles, manometers and one set of special internal elements.Their special converging / diverging design with an optimized angle, assure the highest degree of heat exchange rate between cooling water and traversing bars. Different sizes of cooling elements are used to cover the range of products. A roller way with motorized rollers is provided when cooling elements are not used to make a bye pass of the product. Cooling elements and roller way are supported on steel frames fixed on the foundation.

The technology consists in intense cooling of the bars by violent water flow through the annular spaces in the cooling tubes that impinge on the moving bar thereby converting the outer surface into martensitic micro-structure whereas the core remains hot in ferritic micro-structure. During further progress in the tubes the outer ring of the bar recoups energy from the core and converts to tempered martensite and the core becomes pearlitic structure.This gives enhanced yield strength combined with high elongation properties to the rebar. This way by controlling water flow for a certain rolling campaign mechanical properties can be achieved as per BIS 1786 standard or other international standards for use in concrete buildings, bridges and other such structures. Besides the above mechanical equipment, certain sensors and other instrumentation are required to regulate flow of water. Also a water complex having hot and cold water pumps besides cooling tank and cooling towers with feeding pipe line too