1. Cleaning:
1. of fouled heat exchangers, 3.17.8-13 - 3.17.8-23
1. heat exchangers handling liquids, 3.17.8-13 - 3.17.8-19
2. gas-side fouling, 3.17.8-19 - 3.17.8-22
2. of shell-and-tube heat exchangers, 3.3.4-5