| 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 401 | DD | .~.~ Including tube support or shell-side flow director {5} |
| DIG 405 | DD | .~.~.~ Extending in a longitudinal direction {7} |
| DIG 407 | | .~.~.~.~ Internal casing or tube sleeve {2} |
| DIG 408 | DD | .~.~.~.~.~> Tube sleeve |
| DIG 409 | DD | .~.~.~.~.~> Including transverse element (e.g., fin, baffle, etc.) {1} |