Powder paint facility comprises 5 stages in the painting of the iron product and 9 stages in the painting of aluminium product. Washing section was lowered to 2 stages from 4 stages because of the chemicals developed in iron products. The system was oil removing, rinsing, phosphate and re-rinsing before, but now it may be completed by oil removing, phosphate and rinsing with the mixture of new chemicals. This presents a significant advantage of area and cost gain to our industrialists. The length of the 13 meter spray line, e.g. in a conveyor line operating in min/450m, is determined by daily production quantity. The more the capacity is and so the more the velocity is, the more the spray line shall increase as a matter of course.