Any surface which is hotter than its surroundings will lose heat. The heat loss depends on many factors, but the surface temperature and its size are dominant. Putting the insulation on a hot surface will reduce the external surface temperature. By insulation, the surface will increase on circular pipes or vessels, but the relative effect of temperature reduction will be much greater and heat loss will be reduced. A similar situation occurs when the surface temperature is lower than its surroundings. In both cases some energy is lost. These energy losses can be reduced by laying the practical and economical insulation on surfaces whose temperatures are quite different than the surrounding one. Click here to read this white paper about the specifics of designing insulation systems that account for the variety of variables in the industrial industry.