1. CPC Sections
  2. CPC Section F
  3. CPC Class F17
  4. CPC Subclass F17D
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
F17D
PIPE-LINE SYSTEMS; PIPE-LINES (pumps or compressors F04; fluid dynamics F15D; valves or the like F16K; pipes, laying pipes, supports, joints, branches, repairing, work on the entire line, accessories F16L; steam traps or the like F16T; fluid-pressure electric cables H01B 9/06) [2018-08]
NOTE

  • In this subclass, 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 subclasses.
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
F17D 1/00
Pipe-line systems (conveying articles or materials through a pipe- line by means of a fluid carrier B65G 51/00, B65G 53/00; liquids B67D; special devices for transferring liquids from bulk storage containers into vehicles or boats or vice versa, e.g. loading or unloading vehicles or portable containers B67D 7/00; conveying material which has been excavated by a dredger or soil shifter through a pipe-line E02F 7/10; sewer pipe-line systems E03F 3/00; thermal insulation of pipe-lines F16L 59/00; central heating systems F24D) [2013-01]
F17D 1/005
.
{for a two-phase gas-liquid flow} [2013-01]
F17D 1/02
.
for gases or vapours [2013-01]
F17D 1/04
. .
for distribution of gas [2013-01]
F17D 1/05
. . .
Preventing freezing (by heating F16L 53/30) [2018-01]
F17D 1/06
. .
for steam [2013-01]
F17D 1/065
. .
Arrangements for producing propulsion of gases or vapours [2013-01]
F17D 1/07
. . .
by compression [2013-01]
F17D 1/075
. . .
by mere expansion from an initial pressure level, e.g. by arrangement of a flow-control valve [2013-01]
F17D 1/08
.
for liquids or viscous products (water-main or service pipe systems E03B 7/04; domestic hot-water supply systems F24D 17/00) [2013-01]
F17D 1/082
. .
{for cold fluids, e.g. liquefied gas (F17D 1/086 takes precedence)} [2018-01]
F17D 1/084
. .
{for hot fluids (F17D 1/086 takes precedence)} [2013-01]
F17D 1/086
. .
{for explosives} [2013-01]
F17D 1/088
. .
{for solids or suspensions of solids in liquids, e.g. slurries (F17D 1/086 takes precedence)} [2017-01]
F17D 1/12
. .
Conveying liquids or viscous products by pressure of another fluid [2013-01]
F17D 1/13
. .
Conveying liquids or viscous products by gravity [2013-01]
F17D 1/14
. .
Conveying liquids or viscous products by pumping [2013-01]
F17D 1/16
. .
Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity {(changing the flow or the viscosity by adding a chemical agent C09K 3/00, C10M)} [2013-01]
F17D 1/17
. . .
by mixing with another liquid {, i.e. diluting} [2017-08]
F17D 1/18
. . .
by heating [2013-01]
F17D 1/20
.
Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves (fluid dynamics F15D; damping pulsations in fluids in pipes in general F16L 55/04) [2013-01]
F17D 3/00
Arrangements for supervising or controlling working operations [2013-01]
F17D 3/01
.
for controlling, signalling, or supervising the conveyance of a product [2013-01]
F17D 3/03
.
for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another [2013-01]
F17D 3/05
. .
the different products not being separated (separation of contaminants by distillation B01D 3/00) [2013-01]
F17D 3/08
. .
the different products being separated by "go-devils", e.g. spheres (cleaning devices moved along inside a pipe-lines by fluid pressure B08B 9/04; {pigs or moles per se, their launching and detection F16L 55/26}) [2017-08]
F17D 3/10
.
for taking out the product in the line (sampling in general, examining the physical or chemical properties of materials G01N) [2013-01]
F17D 3/12
.
for injecting a composition into the line [2013-01]
F17D 3/14
.
for eliminating water (separation of liquids B01D, e.g. B01D 17/00; separation of gases or vapours B01D 53/00) [2013-01]
F17D 3/145
. .
{in gas pipelines} [2013-01]
F17D 3/16
.
for eliminating particles in suspension (from liquids by sedimentation B01D 21/00; separation by filtration or otherwise B01D 24/00 - B01D 51/00; centrifugal apparatus B04) [2016-05]
F17D 3/18
.
for measuring the quantity of conveyed product (measuring volume or volume flow, in general G01F) [2013-01]
F17D 5/00
Protection or supervision of installations (arrangements for protecting foundations E02D 31/00; protecting pipes from damage or internal or external wear F16L 57/00, against corrosion and scale F16L 58/00; investigation of the fluid-tightness of structures G01M 3/00) [2013-01]
F17D 5/005
.
{of gas pipelines, e.g. alarm} [2013-01]
F17D 5/02
.
Preventing, monitoring, or locating loss [2013-01]
F17D 5/04
. .
by means of a signalling fluid enclosed in a double wall [2013-01]
F17D 5/06
. .
using electric or acoustic means [2013-01]
F17D 5/08
.
Protection of installations or persons from the effects of high voltage induced in the pipe-line (emergency protective circuit arrangements H02H) [2013-01]