|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

ENGINEERING IN GENERAL

|  | F17 |
STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply Fulltext... Hierarchy... Expanded...E03B)

|  | F17D |
PIPE SYSTEMS; PIPE-LINES (pumps or compressors Fulltext... Hierarchy... Expanded...F04; fluid dynamics Fulltext... Hierarchy... Expanded...F15D; valves or the like Fulltext... Hierarchy... Expanded...F16K; pipes, joints, or associated devices Fulltext... Hierarchy... Expanded...F16L; steam traps or the like Fulltext... Hierarchy... Expanded...F16T; fluid-pressure electric cables Fulltext... Hierarchy... Expanded...H01B 9/06)

|  | F17D |
Note(s) In this sub-class, pipe-line systems are interpreted as systems described in flow sheets as well as arrangements of co-operating elements, the elements per se being covered in the relevant sub-classes.

|  | F17D 1/00 |
Pipe-line systems (for central heating Fulltext... Hierarchy... Expanded...F24D; conveying solids or mixtures of fluids and solids, through conduits Fulltext... Hierarchy... Expanded...B65G 51/00, Fulltext... Hierarchy... Expanded...B65G 53/00; apparatus for dispensing or delivering liquids Fulltext... Hierarchy... Expanded...B67D)

|  | F17D 1/02 |
· | for gases or vapours

|  | F17D 1/04 |
· · | for distribution of gas

|  | F17D 1/05 |
· · · | Preventing freezing (by heating Fulltext... Hierarchy... Expanded...F16L 53/00)

|  | F17D 1/06 |
· · | for steam

|  | F17D 1/08 |
· | for liquids (water-main or service pipe systems Fulltext... Hierarchy... Expanded...E03B 7/04; domestic hot-water supply systems Fulltext... Hierarchy... Expanded...F24D 17/00)

|  | F17D 1/10 |
· · | Arrangements or systems of devices for influencing or alternating dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves (fluid dynamics Fulltext... Hierarchy... Expanded...F15D; damping pulsations in fluids in pipes in general Fulltext... Hierarchy... Expanded...F16L 55/04)

|  | F17D 1/12 |
· · | Conveying liquids by pressure of another fluid

|  | F17D 1/14 |
· · | Conveying liquids by pumping

|  | F17D 1/16 |
· · | Facilitating the conveyance of liquids by altering their viscosity, e.g. by mixing with another liquid

|  | F17D 1/18 |
· · · | by heating (means therefor Fulltext... Hierarchy... Expanded...F16L 53/00)

|  | F17D 3/00 |
Arrangements for supervising or controlling working operations (indicating breaks or leaks in electric cables Fulltext... Hierarchy... Expanded...H01B 7/32; investigating fluid-tightness of pipes, cables, or tubes Fulltext... Hierarchy... Expanded...G01M 3/28)

|  | F17D 3/02 |
· | for controlling, signalling, or supervising the conveyance of two different products separated by "go-devils", e.g. for switching over from one receiving tank to another

|  | F17D 3/04 |
· | for preventing, indicating, or facilitating the location of leaks

|  | F17D 3/06 |
· · | by means of a signalling fluid enclosed in a double wall