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IPC 7
  F16L 25/00 - F16L 37/62  
F16L03900-F16L05548
  F16L 57/00 - F16L 101:70  

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING


F 16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL


F 16 LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL


39/

00Joints or fittings for double-walled or multi-channel pipes or pipe assemblies

39/

02.for hoses

39/

04.allowing adjustment or movement

39/

06.of the multiline swivel type, e.g. comprising a plurality of axially mounted modules [7]

 


41/

00Branching pipes; Joining pipes to walls (F16L 39/00 takes precedence; connections not designed for conveying fluid F16B 9/00; joints suitable for connecting together pipe ends, see the relevant groups)

41/

02.Branch units, e.g. made in one piece, welded, riveted

41/

03..comprising junction pieces for four or more pipe members  [5]

41/

04.Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor (apparatus or operations relating to metal-working steps, see the relevant classes for metal-working)

41/

06..making use of attaching means embracing the pipe

41/

08.Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of a wall or to the axis of another pipe (F16L 41/02 takes precedence)  [2]

41/

10..the extremity of the pipe being screwed into the wall  [5]

41/

12..using attaching means embracing the pipe  [5]

41/

14..by screwing an intermediate part against the inside or outside of the wall  [5]

41/

16..the branch pipe comprising fluid cut-off means  [5]

41/

18.the branch pipe being movable [7]

 


43/

00Bends; Siphons (with cleaning apertures F16L 45/00; siphons for water-closets E03D 11/18; siphons in general F04F 10/00)

43/

02.adapted to make use of special securing means


45/

00Pipe units with cleaning aperture and closure therefor


47/

00Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics (packing, for joints, adapted to sealing by fluid pressure F16L 17/00)

47/

02.Welded joints; Adhesive joints

47/

03..Welded joints with an electrical resistance incorporated in the joint [7]

 

47/

04.with a swivel nut or collar engaging the pipe  [2]

47/

06.with sleeve or socket formed by or in the pipe end  [2]

47/

08..with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket [7]

 

47/

10...the sealing rings being maintained in place by additional means [7]

 

47/

12..with additional locking means [7]

 

47/

14.Flanged joints [7]

 

47/

16.Screw-threaded joints [7]

 

47/

18.Adjustable joints; Joints allowing movement [7]

 

47/

20.based principally on specific properties of plastics [7]

 

47/

22..using shrink-down material [7]

 

47/

24..for joints between metal and plastics pipes [7]

 

47/

26.for branching pipes; for joining pipes to walls; Adaptors therefor [7]

 

47/

28..Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe [7]

 

47/

30...using attaching means embracing the pipe [7]

 

47/

32..Branch units, e.g. made in one piece, welded, riveted [7]

 

47/

34..Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor [7]

 


49/

00Connecting arrangements, e.g. joints, specially adapted for pipes of brittle material, e.g. glass, earthenware

49/

02.Joints with a sleeve or socket  [5]

49/

04.Flanged joints  [5]

49/

06.Joints in which sealing surfaces are pressed together by means of a member, e.g. swivel nut, screwed on, or into, one of the joint parts [7]

 

49/

08.Adjustable joints; Joints allowing movement [7]

 



51/

00Expansion-compensation arrangements for pipe-lines (telescopic pipes F16L 27/12)

51/

02.making use of a bellows or an expansible folded or corrugated tube

51/

03..comprising two or more bellows  [5]

51/

04.making use of bends, e.g. lyre-shaped


53/

00Heating or cooling pipes or pipe systems (preventing freezing of pipes, thawing frozen pipes E03B 7/12, E03B 7/14; pipe-line systems, pipe-lines F17D)


55/

00Devices or appurtenances for use in, or in connection with, pipes or pipe systems (the preceding groups and groups F16L 57/00, F16L 59/00 take precedence; repairing or joining pipes on or under water F16L 1/26; nozzles B05B; cleaning of pipes B08B 9/02, e.g. removal of blockages B08B 9/027; devices for preventing bursting of water pipes by freezing E03B 7/10; for domestic plumbing installations E03C 1/00; arrangements for sealing leaky tubes or conduits of heat-exchangers F28F 11/00)

55/

02.Energy absorbers; Noise absorbers (in valves F16K 47/00)

55/

027..Throttle passages (influencing fluid flow F15D 1/00; control of fluid flow G05D 7/00)  [5]

55/

033..Noise absorbers (F16L 55/027 takes precedence)  [5]

55/

035...in the form of specially adapted hangers or supports [7]

 

55/

04.Devices damping pulsations or vibrations in fluids

55/

045..specially adapted to prevent or minimise the effects of water hammer  [5]

55/

05...Buffers therefor (accumulators F15B 1/04)  [5]

55/

052....Pneumatic reservoirs [7]

 

55/

053.....the gas in the reservoir being separated from the fluid in the pipe [7]

 

55/

054......the reservoir being placed in or around the pipe from which it is separated by a sleeve-shaped membrane [7]

 

55/

055...Valves therefor  [5]

55/

07.Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining (arrangement of draining devices in water-supply systems E03B 7/08; apparatus for draining F16K, F16T; venting or aerating devices per se F16K 24/00)  [2]

55/

09.Air-conditioning, e.g. de-watering, in pneumatic systems (in general F24)

55/

10.Means for stopping flow in pipes or hoses (F16L 29/00, F16L 37/28 take precedence; for covering leaks F16L 55/16; valves F16K) [1,7]

55/

103..by temporarily freezing liquid sections in the pipe [7]

 

55/

105..Closing devices introduced radially into the pipe or hose  [5]

55/

11..Plugs  [5]

55/

115..Caps  [5]

55/

12..by introducing into the pipe a member expandable in situ (inflatable cut-off valves F16K 7/10)

55/

124...introduced radially into the pipe or hose  [5]

55/

128...introduced axially into the pipe or hose  [5]

55/

13....the closure device being a plug fixed by plastic deformation [7]

 

55/

132....the closure device being a plug fixed by radially deforming the packing  [5]

55/

134.....by means of an inflatable packing [7]

 

55/

136....the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like  [5]

55/

16.Devices for covering leaks in pipes or hoses, e.g. hose-menders [1,7]

55/

162..from inside the pipe (specially adapted for bends, branch units, branching pipes, or the like F16L 55/179) [5,7]

55/

163...a ring, a band or a sleeve being pressed against the inner surface of the pipe [7]

 

55/

164...a sealing fluid being introduced in the pipe (F16L 55/1645 takes precedence) [7]

 

55/

1645...a sealing material being introduced inside the pipe by means of a tool moving in the pipe [7]

 

55/

165...a pipe being inserted in the damaged section [5,7]

55/

168..from outside the pipe (specially adapted for bends, branch units, branching pipes, or the like F16L 55/179) [5,7]

55/

17...by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose (hose-clips for connecting hoses to rigid members F16L 33/02) [5,7]

55/

172....the ring, band or sleeve being tightened by a tangentially arranged threaded pin and a nut [5,7]

55/

175...by using materials which fill a space around the pipe before hardening [5,7]

55/

178...by clamping an outer gasket against a joint with sleeve or socket [5,7]

55/

179..specially adapted for bends, branch units, branching pipes or the like [7]

 

55/

18.Appliances for use in repairing pipes (F16L 55/10 takes precedence)

55/

24.Preventing accumulation of dirt or other matter in pipes, e.g. by traps, by strainers

55/

26.Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means (tunnel railway systems B61B 13/10; conveying articles through pipes or tubes, e.g. tube mail systems, B65G 51/00)  [5]

Notes

(1)Pigs or moles specially adapted for particular applications are classified in the relevant places for the applications, e.g.

 stopping flow from or in pipes or hoses F16L 55/12;

 repairing pipes F16L 55/18;

 applying liquids or other fluent materials to the inside of tubes B05C 7/08;

 cleaning pipes or tubes or systems of pipes or tubes B08B 9/02;

 welding or cutting B23K 37/02;

 earth drilling E21B;

 cleaning chimneys F23J 3/02;

 cleaning internal or external surfaces of heat-exchange or heat-transfer conduits F28G;

 measuring, testing G01;

 inspection of vessels in nuclear reactors G21C 17/003;

 inspection or maintenance of pipe-lines or tubes in nuclear installations G21C 17/017;

 installing electric, or combined optical and electric, cables or lines H02G.  [5]

(2)In groups F16L 55/26 to F16L 55/48, it is desirable to add the indexing codes of groups F16L 101:00 to F16L 101:70. The indexing codes should be unlinked.  [6]

55/

28..Constructional aspects  [6]

55/

30...of the propulsion means, e.g. towed by cables  [6]

55/

32....being self-contained  [6]

55/

34.....the pig or mole being moved step by step  [6]

55/

36.....jet driven  [6]

55/

38....driven by fluid pressure  [6]

55/

40...of the body  [6]

55/

42....gelled or degradable  [6]

55/

44....expandable  [6]

55/

46..Launching or retrieval of pigs or moles  [6]

55/

48..Indicating the position of the pig or mole in the pipe or conduit  [6]

  F16L 25/00 - F16L 37/62    F16L 57/00 - F16L 101:70  
 

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