Conditionals / type 1 (only) 1) not only the cleaning process (in involve) labor costs, it may require special equipment, particularly if chemical cleaning (to involve)
2) fresh deposits (to form) only if the deposit bond resistance (to be) greater the prevailing shear forces at the solid-fluid interface
3) dissolution (to occur) only if there (to be) a change in the properties of the deposit
4) if the temperature of the heat exchanger surface on the water side (to be) at or below 0, then a layer of ice (to form) on the surface
5) if the skid (to be) on the shell side, it (to be) impossible to remove the tube bundle
6) if the total thermal resistance (to increase) the amount of heat transferred throughout the surface (to decrease)
7) if the layer of insulating material (to have) a high thermal resistance, higher than any other part of the heat exchangers, the total thermal resistance ( to increase)

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