| 165 / | HD | HEAT EXCHANGE |
| DIG 355 | DD | HAVING SEPARATE FLOW PASSAGE FOR TWO DISTINCT FLUIDS {7} |
| DIG 400 | DD | .~ Shell enclosed conduit assembly {4} |
| DIG 427 | DD | .~.~ Manifold for tube-side fluid (i.e., parallel) {5} |
| DIG 436 | DD | .~.~.~ Bent conduit assemblies {1} |
| DIG 437 | | .~.~.~.~ Coiled {1} |
| DIG 438 | DD | .~.~.~.~.~> Helical |