The majority of leakage is hard to find out. Air leakage of 1.9 mm and lower in diameter is not audible to human ear. Only one air leakage wastes energy costs up to 13,000 units per year. Often there may occur hundreds of leakages in a plant and owner is not aware of it.
Normally the actual flow of compressor goes 70 % to 90 % of total rated flow. There may a number of causes and need to find it out
Corrosion is one of the major causes for degrading performance of steel pipes in compressed air system. Corrosion is the gradual loss of metal surface and cause of poor quality of production.