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PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
Definition statement
This subclass covers:
  • Methods and machines for laying pipes (F16L 1/00)
  • Devices to support, fix or hold pipes (F16L 3/00)
  • Pipes: conduits of closed cross-section which are specially adapted to convey fluids, material or objects (F16L 9/00 and F16L 11/00)
  • Energy and noise absorbers associated with pipes (F16L 55/02-F16L 55/055)
  • Means for stopping flow from or in pipes (F16L 55/10-F16L 55/136)
  • Devices for covering leaks in pipes (F16L 55/16-F16L 55/179)
  • Pipe pigs primarily for repairing pipes (F16L 55/26-F16L 55/48)
  • Protection of pipes against wear, heat, cracking, buckling and corrosion (F16L 57/00 and F16L 58/00)
  • Thermal insulation of pipes, or in general, e.g. when no other special application of the insulation is given (F16L 59/00)
  • Tubular bodies that are not used to carry fluid, material or objects, e.g. pipes for scaffoldings, or furniture
  • If the pipe or connection is adapted for a specific use, it is only classified in the use field (e.g. medical connectors, micro connectors or vacuum cleaners)
  • Documents that concern the specific material or a specific use for thermal insulation are classified in the specific fields for the material or use (e.g. fridges, building panels or motor compartments)

The class is divided in the following main groups

F16L 1/00 Laying of pipes

F16L 3/00 Fixation of pipes

F16L 5/00 Pipes passing through walls

F16L 7/00 Pipe support inside other pipes

F16L 9/00 Rigid pipes

F16L 11/00 Hoses (the product)

F16L 13/00 Non-disconnectable pipe-joints (not made of plastic material)

F16L 15/00 Screw-threaded joints

F16L 17/00 Sealing by fluid pressure

F16L 19/00 Connection of pipes with swivel nuts

F16L 21/00 Male-female couplings

F16L 23/00 Flanged joints

F16L 25/00 Special types of connections for pipes (not in F16L 13/00-F16L 23/00)

F16L 27/00 Adjustable joints (e.g. for allowing movements)

F16L 29/00 Joints with cut-off means

F16L 31/00 Connection of two hoses or two flexible sleeves

F16L 33/00 Connection of hoses to rigid members

F16L 35/00 Safety connections of hoses

F16L 37/00 Quick-acting couplings

F16L 39/00 Multiple/double-walled joints of fittings for pipes or hoses

F16L 41/00 Branching pipes or joining pipes to walls or pipes

F16L 45/00 Pipe units with apertures

F16L 47/00 Connection of plastic pipes; Connectors made of plastic

F16L 49/00 Connection of pipes or to pipes of brittle material

F16L 51/00 Expansion compensation devices (e.g. thermal expansion)

F16L 53/00 Heating/cooling pipes or pipe-systems

F16L 55/00 Energy absorbers, noise absorbers, means for plugging pipes, pigs, repairing pipes etc.

F16L 57/00 Protection of pipes, e.g. against external/internal damage or wear

F16L 58/00 Protection of pipes against corrosion of incrustation (e.g. by coatings)

F16L 59/00 Thermal insulations

References relevant to classification in this subclass
This subclass does not cover:

Watering gardens, fields, sports grounds, or the like, e.g. perforated pipe-lines

Vacuum cleaners, e.g. corrugated hoses; leaning machines, e.g. hose connections combined with electrical contacts, steam hoses with cables for steam ironing

Connectors in the medical field, e.g. catheters

Fire fighting/fire fighting hoses/ sprinkler systems/

Micro/macro connectors, e.g. for lab on chip

Air conditioning ducts in vehicles

Fuel conduits in vehicles, connections to LPG tank

Fixing of hoses or cables in motors vehicles

Arrangement of piping or air hoses for brake systems

Containers/bags/vessels/tanks Connections to containers in generalClosing straps

Bends for conveying concrete

Wear protection for bends for conveying concrete

LPG couplings/filling nozzles/ Transferring fluids, e.g. fuel from bulk to vehicles or portable containers

Dispensing fluids, e.g. filling bottles or cans

Fastening of pipes or cables to bridges

Couplings for dredgers

Domestic plumbing: shower hoses; toilet installations; drainage;Sewage

Downpipes for roof drainage, fixing means therefore

Vertical ducts, channels in buildings, e.g. chimneys

Air ducts for ventilation of mines or tunnels, connections therefore

Suspension devices for tubes or the like in mines or tunnels

Exhaust pipes

Air intake in motor engines, e.g. ducts between motor and filter

Conduits, junctions for lubrication systems

Connections to gas tanks

Pipelines/pipe systems

Water tubes of steam boilers

Joints, connection for chimneys or flues

Hot water systems, central heating, e.g. distributors for heating built up from modules

Ducting arrangements for air-conditioning

Sealing elements into header boxes or end plates of heat-exchangers

Pipes in nuclear reactors

Informative references
Attention is drawn to the following places, which may be of interest for search:

Sprayers

Cleaning of pipes

Pipe laying ships

Fluid concrete transport

Fixing devices, e.g. hollow screws

Valves

Heat exchangers

Installation of electric cables, e.g. cable or pipe binders, cable or pipe channels

Special rules of classification within this subclass
  • Don't give classification when the features in the document concerning this subclass are obviously of no technical value, or a mere reference (e.g. if in a document it is mentioned that the connection can be also made by gluing, welding, screwing... without a further relevant technical information)
  • Documents mainly concerning the material of the pipe or hose are classified in main groups F16L 9/00 or F16L 11/00
  • There is a horizontal indexing scheme for further details not related to a specific ECLA group:

Uses or applications of pigs or moles F16L 2101/00

Special arrangements for pipe couplings F16L 2201/00

Laying or reclaiming pipes; Repairing or joining pipes on or under water (soldering or welding B23K; lifting-gear and load-engaging elements B66; hydraulic installations, soil drainage E02B; excavations or underwater constructions E02D; {conduits made of concrete in situ E02D 29/10}; machines for digging trenches in combination with pipe-assembly E02F; laying sewer pipes E03F 3/06; in earth boreholes or wells E21B; tunnelling E21D; laying electric, or combined optical and electric, cables H02G; making special pipes joint, see the relevant groups for the joints)
References relevant to classification in this group
This group does not cover:

Lining of pipes, replacement of damaged part of a pipe, replacing an existing pipe with a new pipe, wherein the old pipe is being ruptured

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Laying sewer pipes

Laying sewer pipes in earth boreholes or wells

Informative references
Attention is drawn to the following places, which may be of interest for search:

Soldering or welding

Pipe laying ships

Lifting-gear and load-engaging elements

B66

Hydraulic installations, soil drainage

Excavations or underwater constructions

Machines for digging trenches in combination with pipe-assembly

Tunnelling

Laying electric, or combined optical and electric, cables

{at a certain height off the ground}
Definition statement
This subgroup covers:

Pipes passing over streets or bodies of water

the pipes being made
Definition statement
This subgroup covers:

Methods of laying pipes wherein the material which forms the pipe later, takes the pipe-shape at the building site, e.g. concrete

References relevant to classification in this group
This subgroup does not cover:

Pipe laying methods wherein the pipe is made by connecting together short pipe pieces

{Devices for the protection of pipes under water (in general F16L 57/00)}
Definition statement
This subgroup covers:

protection against fishing, cortex induced vibrations

vertically
Definition statement
This subgroup covers:

pipes that stay vertically, for example: riser pipes

{the pipe being composed of sections of short length}
Definition statement
This subgroup covers:

e.g.pipe laying methods wherein the pipe segments are joined together on the bottom of the body of water.

Stingers
Definition statement
This subgroup covers:

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Pipe tensioning apparatus
Definition statement
This subgroup covers:

clamping devices holding the pipe during laying

Apparatus for controlling the pipe during laying
Definition statement
This subgroup covers:

e.g. checking welding seams or coatings just before laying of the pipe

Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets (anchors for holding pipes on or under the ground F16L 1/06; {sound-damping supports F16L 55/035; supports for insulated pipes F16L 59/135})
References relevant to classification in this group
This group does not cover:

Holders for pipes passing through walls or partitions

Sound-damping supports

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Supports for insulated pipes

Informative references
Attention is drawn to the following places, which may be of interest for search:

Anchors for holding pipes on or under the ground

{with two members engaging the pipe, cable or tubing, the two members being joined only on one side of the pipe}
Definition statement
This subgroup covers:

e.g. pipe clamps made of two parts, the parts being connected on one side and the opposite side stays open

{with a pair of arms moved automatically to closed position by overcenter spring}
Definition statement
This subgroup covers:

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{the pipe being fixed by rotation of an element}
Definition statement
This subgroup covers:

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and extending along the attachment surface
Definition statement
This subgroup covers:

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the transverse movement being converted to a rotational movement (F16L 3/215 takes precedence)
Definition statement
This subgroup covers:

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{the axis of each spring being parallel with the direction of the movement of the pipe}
Definition statement
This subgroup covers:

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{having brackets connected together by means of a common support}
Definition statement
This subgroup covers:

Support for supporting a number of parallel pipes at intervals, wherein the brackets and support are originally two different parts

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{having single supports directly connected together}
Definition statement
This subgroup covers:

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each support having one transverse base for supporting the pipes (F16L 3/23, F16L 3/237 take precedence)
Definition statement
This subgroup covers:

one integral support for all pipes

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Devices for use where pipes, cables or protective tubing pass through walls or partitions ({joining pipes to walls F16L 41/00; joining plastic pipes to walls F16L 47/26; passing insulated pipes through walls F16L 59/121; for steam boilers F22B 37/105}; arrangements for leading electric cables or lines through walls, floors or ceilings H02G 3/22)
References relevant to classification in this group
This group does not cover:

Joining pipes to walls

Joining plastic pipes to walls

Passing insulated pipes through walls

Arrangements for leading electric cables or lines through walls, floors or ceilings

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

For steam boilers

Informative references
Attention is drawn to the following places, which may be of interest for search:

Sealing elements into header boxes or end plates of heat-exchangers

Holders for pipes passing through walls or partitions

Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under road or railways without interruption of traffic (sleeves for supporting pipes, cables or protective tubing, between relatively movable points F16L 3/01, {fixation devices of optical cables in ducts G02B 6/508, installation of electric cables H02G 1/08})
References relevant to classification in this group
This group does not cover:

Sleeves for supporting pipes, cables or protective tubing, between relatively movable points

Fixation devices of optical cables in ducts

Installation of electric cables

Rigid pipes {(steam boiler tubes F22B 37/10)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Steam boiler tubes

Pipes composed of a plurality of segments
Glossary of terms
In this subgroup, the following terms (or expressions) are used with the meaning indicated:

The term "segments" means radial segments, not axial segments

This group covers e.g.

media9.jpg

Hoses, i.e. flexible pipes (hose-like supports for pipes, cables or protective tubing, between relatively movable points F16L 3/01; suction-cleaner hoses A47L 9/24)
References relevant to classification in this group
This group does not cover:

Hose-like supports for pipes, cables or protective tubing, between relatively movable points

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Suction-cleaner hoses

{two layers}
Definition statement
This subgroup covers:

e.g. hoses with two layers of helically wound cord or wire

{three or more layers}
Definition statement
This subgroup covers:

e.g. hoses with three or more layers of helically wound cord or wire

{two layers}
Definition statement
This subgroup covers:

e.g. hoses with two braided layers

{three or more layers}
Definition statement
This subgroup covers:

e.g. hoses with three of more braided layers

with corrugated wall {(F16L 11/24 takes precedence)}
Definition statement
This subgroup covers:

corrugated hoses made from elastic material

having reinforcements not embedded in the wall
Definition statement
This subgroup covers:

e.g.

media10.jpg

Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints (joints for rigid pipes of plastics F16L 47/00; {non-disconnectible pipe-joints to walls or other pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of the other pipe F16L 41/082})
References relevant to classification in this group
This group does not cover:

Non-disconnectible pipe-joints to walls or other pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of the other pipe

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Joints for rigid pipes of plastics

Screw-threaded joints ({hose connections with parts screwed directly on or into the hose F16L 33/24; joining pipes to wall F16L 41/00}; casing joints used in deep-drilling E21B 17/08; joints sealed primarily by means other than engagement of screw-threads, see the relevant groups characterised by the sealing arrangements); Forms of screw-threads for such joints
References relevant to classification in this group
This group does not cover:

Screw-threaded connections for drilling rods (drill hammer)

Hose connections with parts screwed directly on or into the hose

Joining pipes to walls

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Casing joints used in deep-drilling

Informative references
Attention is drawn to the following places, which may be of interest for search:

For lubricating aspects

with supplementary elements (F16L 15/04, {F16L 41/00 and F16L 43/02} take precedence)
Definition statement
This subgroup covers:

screw threaded connections with supplementary elements, e.g. additional locking elements. Not covered are screw threaded connections with supplementary elements which form a sealing.

Joints with packing adapted to sealing by fluid pressure ({for universal joints with partly spherical engaging surfaces F16L 27/067; joints allowing adjustment or movement only about the axis of one pipe F16L 27/08; joints comprising a flexible connection only F16L 27/10; joints allowing substantial longitudinal adjustment or movement F16L 27/12; for hoses F16L 33/16; couplings of the quick acting type F16L 37/00;} compensating devices F16L 51/00; sealings tightened by external pressure, inflatable packings F16J 15/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:

For universal joints with partly spherical engaging surfaces

Joints allowing adjustment or movement only about the axis of one pipe

Joints comprising a flexible connection only

Joints allowing substantial longitudinal adjustment or movement

For hoses

Couplings of the quick acting type

Compensating devices

Sealings tightened by external pressure, inflatable packings

the sealing rings having radially directed ribs
Definition statement
This subgroup covers:

media11.jpg

Glossary of terms
In this subgroup, the following terms (or expressions) are used with the meaning indicated:

the term "radially directed ribs" also includes the ribs which are deformed in axial direction upon connection

the sealing rings having two lips parallel to each other
Definition statement
This subgroup covers:

media12.jpg

with longitudinally split or divided sleeve
Definition statement
This subgroup covers:

media13.jpg

Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts ({screw-threaded joints F16L 15/00;}F16L 17/00 takes precedence; if using bolts or equivalent connecting means F16L 23/00; {electrically insulating F16L 25/02; adjustable joints, joints allowing movement F16L 27/00; specially adapted for pipes of brittle material F16L 49/06})
References relevant to classification in this group
This group does not cover:

Screw-threaded joints

If using bolts or equivalent connecting means

Adjustable joints, joints allowing movement

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Specially adapted for pipes of brittle material

Informative references
Attention is drawn to the following places, which may be of interest for search:

Electrically insulating

{the collar not being integral with the pipe}
Definition statement
This subgroup covers:

Joints with flanges not forming part of the pipe body. This includes welded or screwed on flanges which are not considered to be integral with the pipe

{a pressure ring being arranged between the clamping ring and the threaded member or the connecting member}
Definition statement
This subgroup covers:

connections having two rings

the wedging action being effected by means of a ring
Definition statement
This subgroup covers:

connections having one ring

{the ring being rotatably connected to one of the connecting parts}
Definition statement
This subgroup covers:

connections wherein the ring rotates with the nut during the fastening

{the longitudinal cross-section of the ring not being modified during clamping}
Definition statement
This subgroup covers:

connections wherein the ring being a split ring

the profile of the ring being altered
Definition statement
This subgroup covers:

connection wherein the ring being no split ring

Joints with sleeve or socket (F16L 13/00, {F16L 15/00}, F16L 17/00, F16L 19/00, {F16L 25/0027, F16L 27/00, F16L 37/00} take precedence; {specially adapted to be made of plastics or to be used with pipes made of plastics F16L 47/06; specially adapted for pipes of brittle material F16L 49/08; devices for covering leaks in pipes or hoses F16L 55/16})
References relevant to classification in this group
This group does not cover:

Non-disconnectable pipe-joints

Screw-threaded joints

Joints adapted to sealing by fluid pressure

Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut

Joints for pipes made of reinforced concrete

Adjustable joints

Couplings of the quick-acting type

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Specially adapted to be used with pipes of plastic

Specially adapted to be used with pipes of brittle material

Informative references
Attention is drawn to the following places, which may be of interest for search:

Devices for covering leaks in pipes or hoses

Flanged joints (F16L 13/00, F16L 17/00, F16L 19/00 take precedence; adjustable joints F16L 27/00; for hoses F16L 33/00; couplings of the quick-acting type F16L 37/00; for double-walled or multi-channel pipes or assemblies F16L 39/00; specially adapted for pipes of brittle material pipe F16L 49/00)
References relevant to classification in this group
This group does not cover:

Non-disconnectable pipe-joints

Joints adapted to sealing by fluid pressure

Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut

Adjustable joints

For hoses

Couplings of the quick-acting type

For double-walled or multi-channel pipes or assemblies

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Specially adapted to be used with pipes of brittle material

{Auxiliary devices}
Definition statement
This subgroup covers:

devices for aligning, separating or locking of the flange connection

{Attachments}
Definition statement
This subgroup covers:

Attachments to the joints having no sealing or connection function e.g. measuring devices or valves that are attached to, or integrated in the flange

media14.jpg

{the shoulder not being formed from the pipe}
Definition statement
This subgroup covers:

media15.jpg

References relevant to classification in this group
This subgroup does not cover:

Joints with sleeve and socket, where the pipe ends are overlapping:

{the pipe ends abutting each other}
Definition statement
This subgroup covers:

Joints where "pipe ends are abutting each other", which should be interpreted in the way that no extra sealing rings are present and there is surface to surface contact between the flanges

media16.jpg

Constructive types of pipe joints not provided for in groups F16L 13/00 to F16L 23/00(adjustable joints F16L 27/00; couplings of the quick-acting type F16L 37/00; specially adapted to be made of plastics or to be used with pipes made of plastics F16L 47/00){Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means}
References relevant to classification in this group
This group does not cover:

Non-disconnectable pipe-joints

Screw-threaded joints

Joints adapted to sealing by fluid pressure

Joints in which sealing surfaces are pressed together by means of a member, e.g. swivel nut

Joints with sleeve or socket

Flanged joints

Adjustable joints

Couplings of the quick-acting type

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Specially adapted to be made of plastics or to be used with pipes made of plastics

{Combination of a quick-acting type coupling and a conventional one}
Definition statement
This subgroup covers:

media17.jpg

comprising a collar or ring having a threaded pin rigid with the pipe-encircling member
Definition statement
This subgroup covers:

media18.jpg

Sleeveless joints between two pipes, one being introduced into the other
Definition statement
This subgroup covers:

media19.jpg

Adjustable joints, Joints allowing movement (of the quick-acting type F16L 37/50; for double-walled or multi-channel pipe assemblies F16L 39/04; {connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L 47/00; connecting arrangements specially adapted for pipes of brittle material F16L 49/00})
References relevant to classification in this group
This group does not cover:

Couplings of the quick-acting type

For double-walled or multi-channel pipes or assemblies

Branching pipes, wherein the branch pipes are moveable

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics

Specially adapted to be used with pipes of brittle material

Connections between hoses and sprayers

held in place by a screwed member having an internal spherical surface
Definition statement
This subgroup covers:

joints held together with a swivel nut

{Arrangements of joints with one another and with pipes or hoses}
Definition statement
This subgroup covers:

e.g.

media20.jpg

allowing substantial longitudinal adjustment or movement (by use of screw-thread F16L 15/02)
References relevant to classification in this group
This subgroup does not cover:

Telescopic bends:

Joints with fluid cut-off means (quick-acting joints with cut-off means F16L 37/28; {valves, taps or cocks in general F16K})
Definition statement
This group covers:

The fluid cut off means must be a part of, or functionally associated with the connection, not just a valve in a pipe, otherwise its classified only with the valves F16K

References relevant to classification in this group
This group does not cover:

Couplings of the quick-acting type with cut-off means

Informative references
Attention is drawn to the following places, which may be of interest for search:

Valves, taps and cocks in general

Arrangement for connecting hoses to one another or to flexible sleeves (F16L 33/00 takes precedence)
Definition statement
This group covers:

hoses directly connected to each other

References relevant to classification in this group
This group does not cover:

Arrangements for connecting hose to rigid members

Rigid hose connectors, i.e. single members engaging both hoses

Arrangements for connecting hoses to rigid members (hand tools for inserting fittings into hoses B25B 27/10); Rigid hose connectors, i.e. single members engaging both hoses {(hoses or hose couplings specially adapted for suction cleaners A47L 9/24)}
References relevant to classification in this group

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Hose couplings specially adapted for suction cleaners

Informative references
Attention is drawn to the following places, which may be of interest for search:

Hand tools per se for inserting fittings into hoses

tightened by deforming radially extending loops or folds
Definition statement
This subgroup covers:

e.g. Oetiker ears

with a taping-bolt, i.e. winding up the end of the hose-encircling member
Definition statement
This subgroup covers:

e.g. fastening means working like a sardine-can opener

specially adapted for hoses of metal
Definition statement
This subgroup covers:

corrugated hoses

Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices
Definition statement
This group covers:

safety housings; devices against unauthorized use, anti-kink devices for pipe ends; pressure relief devices

Couplings of the quick-acting type (radially binding sleeves F16L 17/04, F16L 21/06; connecting hoses to rigid members F16L 33/00; connections made automatically when vehicles are brought together B60D, B61G; specially adapted for lubricating devices F16N 21/00)
Definition statement
This group covers:

Joints wherein the connection is established by one or two simple quick movements

References relevant to classification in this group
This group does not cover:

Radially binding sleeves

Connecting hoses to rigid members

Welded connections or screwed connections

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Connections between hoses and sprayers

Connections made automatically when vehicles are brought together

Specially adapted for lubricating devices

in which the connection is maintained only by friction of the parts being joined (F16L 37/22 takes precedence)
Definition statement
This subgroup covers:

Couplings that can be separated by force, e.g. pulling strongly

combined with automatic locking {(F16L 37/22 takes precedence)}
Definition statement
This subgroup covers:

Joints wherein the connection is established by one simple quick movement: simply push the two pipe ends together: "click"

{by means of a ring pivoting so as to lie against the tube}
Definition statement
This subgroup covers:

media21.jpg

{rocking freely}
Definition statement
This subgroup covers:

Couplings with rigid hook members which can pivot

media22.jpg

by means of latching members pushed radially by spring-like elements
Definition statement
This subgroup covers:

media23.jpg

References relevant to classification in this group
This subgroup does not cover:

Radially moved latching members forming a ring

by means of hooks hinged about an axis
Definition statement
This subgroup covers:

media24.jpg

using a rotary external sleeve or ring on one part
Definition statement
This subgroup covers:

Joints wherein the connection is established by two simple quick movements: Pushing the two pipe ends together plus an additional second action; an action to achieve the locking

{using hooks hinged about an axis placed behind a flange and which act behind the other flange}
Definition statement
This subgroup covers:

media25.jpg

Joints tightened by the action of a wedge-shaped hinged hook
Definition statement
This subgroup covers:

media26.jpg

GB607402

Joints tightened by eccentrics or rotatable cams
Definition statement
This subgroup covers:

media27.jpg

US5904380

Bayonet-type coupling
Definition statement
This subgroup covers:

Joints wherein the locking pins are visible in closed position

the male part having lugs on its periphery penetrating in the corresponding slots provided in the female part
Definition statement
This subgroup covers:

Bayonet type couplings with male part having external lugs, wherein the locking pins are not visible in closed position

Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
References relevant to classification in this group
This group does not cover:

Joints of the quick acting type

allowing adjustment or movement {(in general F16L 27/00; of the multiline swivel type F16L 39/06)}
Definition statement
This subgroup covers:

Connections wherein the different lines turn together

media28.png

of the multiline swivel type, e.g. comprising a plurality of axially mounted modules
Definition statement
This subgroup covers:

Connections wherein the different lines are independently turnable

media29.jpg

FR2538875

Branching pipes; Joining pipes to walls (F16L 39/00 takes precedence; joints suitable for connecting together pipe-ends see the relevant groups {specially adapted to be made of plastics or to be used with pipes made of plastics F16L 47/26; characterised by couplings of the quick-acting type F16L 37/008;} connections not designed for conveying fluid F16B 9/00)
Definition statement
This group covers:

joining pipes to walls of other pipes

References relevant to classification in this group
This group does not cover:

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

The branch pipe being joint to the main pipe or the wall by a coupling of the quick acting type

Joining pipes to walls of vehicle tanks

The pipes passing through the walls

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Specially adapted to be made of plastics or to be used with pipes made of plastics

Informative references
Attention is drawn to the following places, which may be of interest for search:

Connectors not designed for conveying fluid

{adjustable and comprising a hollow threaded part in an opening}
Definition statement
This subgroup covers:

media30.jpg

FR2538875

{adjustable and comprising a bend}
Definition statement
This subgroup covers:

media31.jpg

DE1475792

comprising junction pieces for four or more pipe members
Definition statement
This subgroup covers:

e.g. manifolds

Informative references
Attention is drawn to the following places, which may be of interest for search:

Manifolds for hydraulics and pneumatics

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)
References relevant to classification in this group
This subgroup does not cover:

Tapping means specially adapted for plastic pipes

{without removal of material (F16L 41/065 takes precedence)}
Definition statement
This subgroup covers:

e.g. the tapping means piercing the wall

{without removal of material}
Definition statement
This subgroup covers:

e.g. the tapping means piercing the wall by using guidance on attaching means embracing the pipe

Bends; Siphons (with cleaning apertures F16L 45/00; { expansion-compensation arrangements making use of bends F16L 51/04}; siphons for water-closets E03D 11/18; siphons in general F04F 10/00)
References relevant to classification in this group
This group does not cover:

Bends with cleaning apertures

Expansion-compensation arrangements making use of bends

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Odour seals for basins

Siphons for water-closets

Siphons in general

adapted to make use of special securing means
Definition statement
This subgroup covers:

e.g. stress relief devices holding the pipe on both sides of the bend

media32.jpg

US2010244437

Pipe units with cleaning aperture and closure therefor
References relevant to classification in this group
This group does not cover:

Means for stopping flow from or in pipes or hoses

Informative references
Attention is drawn to the following places, which may be of interest for search:

Launching or retrieval of pigs or moles

Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics {(rigid pipes of plastics F16L 9/12; connections for hoses of plastics F16L 33/006; bends or siphons F16L 43/008)}
Relationship between large subject matter areas

Not covered are fittings made of plastic or which are used with plastic pipes, but are not specially adapted therefore, e.g. if they could be made of any other material without any adaptations. These fittings are classified in the general groups for the respective connections.

References relevant to classification in this group
This group does not cover:

Connections for hoses of plastics

Informative references
Attention is drawn to the following places, which may be of interest for search:

Rigid pipes of plastics

Connecting arrangements, e.g. joints, specially adapted for pipes of brittle material, e.g. glass, earthenware {(sleeves, nipples or reduction pieces made of elastic material F16L 21/005)}
Relationship between large subject matter areas

Not covered are joints of pipes of brittle material when the connection is not specially adapted therefore, e.g. if they could be made of any other material without any adaptations. These fittings are classified in the general groups for the respective connections.

References relevant to classification in this group
This group does not cover:

Sleeves, nipples of reduction pieces made of elastic material

Expansion-compensation arrangements for pipe-lines ({hangers or supports for pipes with special provision allowing movement of the pipes F16L 3/16;} telescopic pipes F16L 27/12)
References relevant to classification in this group
This group does not cover:

Telescopic pipes

Informative references
Attention is drawn to the following places, which may be of interest for search:

Hangers or supports for pipes with special provision allowing movement of the pipes

making use of bellows or an expansible folded or corrugated tube {(rigid corrugated pipes F16L 9/06; corrugated hoses made of rigid material F16L 11/15)}
References relevant to classification in this group
This subgroup does not cover:

Bellows that are intended to provide adjustment or movement to the coupling:

{with the expansion or contraction of each corrugation being limited}
Definition statement
This subgroup covers:

media33.jpg

US6422611

comprising two or more bellows
Definition statement
This subgroup covers:

media34.jpg

DE102007052243

Heating 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)
References relevant to classification in this group
This group does not cover:

Heating or cooling of hoses

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Preventing freezing of pipes, thawing frozen pipes

Pipe-line systems, pipe-lines

Heat exchangers

Informative references
Attention is drawn to the following places, which may be of interest for search:

Heating or cooling of valves

Devices 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; {arrangements of draining devices for water main or service pipe systems E03B 7/08;} devices for preventing bursting of water pipes by freezing E03B 7/10; {draining devices for hydrants E03B 9/14;} for domestic plumbing installations E03C 1/00; {steam traps for draining of liquids from enclosures containing gases or vapours F16T}; arrangements for sealing leaky tubes or conduits of heat-exchangers F28F 11/00)
Definition statement
This group covers:

e.g. damping devices, means for stopping flow, devices for covering leaks, pigs or moles, preventing accumulation of dirt,

References relevant to classification in this group
This group does not cover:

Repairing or joining pipes on or under water

Cleaning of pipes

Devices for preventing bursting of water pipes by freezing

Steam traps for draining of liquids from enclosure containing gases or vapours

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

For domestic plumbing installations

Arrangements for sealing leaky tubes or conduits of heat-exchangers

Arrangements of draining devices for water main or service pipe systems

Draining devices for hydrants

Informative references
Attention is drawn to the following places, which may be of interest for search:

Nozzles

{using transversal baffles defining a tortuous path}
Definition statement
This subgroup covers:

media35.jpg

FR2942018

This group covers

media36.jpg

FR2447069

the gas in the reservopir being separated from the fluid in the pipe
Definition statement
This subgroup covers:

pneumatic reservoirs having a membrane

Plugs {(F16L 55/128 takes precedence)}
Definition statement
This subgroup covers:

closing means which can be fixed inside the pipe end

Caps {(F16L 55/1286 takes precedence)}
Definition statement
This subgroup covers:

closing means which can be fixed on the outside of the pipe end

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)
Definition statement
This subgroup covers:

also two half sleeves

Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers {(preventing accumulation in pneumatic conveyers B65G 53/521)}
References relevant to classification in this group
This subgroup does not cover:

Cleaning of pipes:

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)
Definition statement
This subgroup covers:

pigs which are used to repair pipes

References relevant to classification in this group
This subgroup does not cover:

Pigs which are used to stop flow in pipes

Pigs which are used to apply liquids to the inside of the pipes

Pigs for cleaning pipes

Pigs for welding or cutting

Pigs for measuring or testing

Pigs for inspecting or maintenance of pipes in nuclear reactors

Pigs for the installation of cables

Protection of pipes or objects of similar shape against external or internal damage or wear ({protection under water F16L 1/123;} supporting of pipes inside other pipes or sleeves F16L 7/00; used in connection with end fittings of hoses F16L 35/00; protection thereof during transport B65D, e.g. B65D 59/00; {for steam boilers F22B 37/107})
References relevant to classification in this group
This group does not cover:

Protection under water

Supporting of pipes inside other pipes or sleeves

Used in connection with end fittings or hoses

Protecting of pipes during transport

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

For steam boilers

Informative references
Attention is drawn to the following places, which may be of interest for search:

For tubular articles not conveying fluid

against wear (F16L 57/04 takes precedence)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Informative reference:

For pipes conveying concrete

Protection of pipes or pipe fittings against corrosion or incrustation (supporting of pipes inside other pipes or sleeves F16L 7/00; compound tubes F16L 9/14; cleaning pipes or tubes B08B 9/02)
References relevant to classification in this group
This group does not cover:

Cathodic corrosion protection

Compound tubes

Informative references
Attention is drawn to the following places, which may be of interest for search:

Cleaning pipes or tubes

Supporting of pipes inside other pipes or sleeves

Thermal insulation in general (heat, sound insulation in buildings E04B; heat insulation of steam engines F01B 31/08; { thermal or acoustic isolation for combustion engines F02B 77/11}; heat insulation in rotary piston machines F01C 21/06; heat insulation of pumps F04C 29/04; thermal insulation of pressure vessels F17C 1/12; vessels not under pressure, with provision for insulation F17C 3/02)
Definition statement
This group covers:

insulation for pipes or hoses or pipe cover elements wherein no other specific use is given. This group does not cover materials for thermal insulation, which are classified in the specific groups for the materials.

References relevant to classification in this group

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Heat, sound insulation in buildings

Heat insulation of steam engines

Thermal or acoustic insulation for combustion engines

Heat insulation in rotary piston machines

Heat insulation of pumps

Thermal insulation of pressure vessels

Vessels not under pressure, with provision for insulation

For refrigerators

{with a hinge opposite the slit}
Definition statement
This subgroup covers:

media37.jpg

DE202005004339U

{in which the temperature of the medium is below that of the ambient temperature (rigid pipes of wood F16L 9/006; vacuum insulation F16L 59/065)}
Definition statement
This subgroup covers:

insulation for pipes conveying cryogenic fluids

{covering the end of an insulated section}
Definition statement
This subgroup covers:

media38.jpg

US6752176

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013