GB2552662A - A frost or freeze protection device and method for water pipes and other water filled devices or objects - Google Patents

A frost or freeze protection device and method for water pipes and other water filled devices or objects Download PDF

Info

Publication number
GB2552662A
GB2552662A GB1613218.5A GB201613218A GB2552662A GB 2552662 A GB2552662 A GB 2552662A GB 201613218 A GB201613218 A GB 201613218A GB 2552662 A GB2552662 A GB 2552662A
Authority
GB
United Kingdom
Prior art keywords
water
pipe
pipes
expand
freezes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1613218.5A
Other versions
GB201613218D0 (en
Inventor
Ian Williams Christopher
Original Assignee
Ian Williams Christopher
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ian Williams Christopher filed Critical Ian Williams Christopher
Priority to GB1613218.5A priority Critical patent/GB2552662A/en
Publication of GB201613218D0 publication Critical patent/GB201613218D0/en
Publication of GB2552662A publication Critical patent/GB2552662A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/09Component parts or accessories
    • E03B7/10Devices preventing bursting of pipes by freezing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00Expansion-compensation arrangements for pipe-lines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling

Abstract

A compressible bladder, pocket or cell may be located within a closed pipe so that if water in said pipe freezes as the volume of the water increases the bladder is compressed accordingly thus preventing an increase in internal pressure. The bladder may comprise a pipe like means 4 located at the centre of the pipe 1 via series of webs as in Fig D. The device may be adhered to one side of the pipe as in Figs B and C. The device may be a compressible foam honeycomb material containing air pockets. The walls of the pipe may be coated in a compressible foam or gell like substance, (Fig 2, 4). The walls of the pipe may contain cavities (Fig 1, 2) that compress in response to an increase in pressure.

Description

= =¾¾ :== =1 Ηίβφ;'-3»ί ' =- .··' .·- = i - - .. - v, .. . .. = = ·· .·· .= V ., '' ' =;:W=/Y..=-· - TITLE·' · -:=--- rf; - : ·.: ::. i . :====-== ==,::-==-=-==::-=====.: A Frost or Freeze Protection Device and Method for Water Pipes and

Other Water Filled Devices or Objects. - ,- - ==. ' . .1 :. =. . ’ -=====, =· =-.=; - ,,.= =,.,, ... = ==:--=:.,= - === -, := - ==,=: .‘.'ίϊ';'.:-,.-:--.-; -. ,-!==5";f-,.-^.ν·Γ'-·:Λ·ϊ·.·ιίΐ« " ' i· -:,-..5-,--. < . ,-: - -..., , -· . ..-., ... ; --,: ==..-. , H , = ; .=,:=,5 :=---:=¾ - mmmmu -. - · :·,' “ “ - ' -···.;'·“

When water freezes it expands by approximately 10%. If a water pipe or Other object filled with water freezes, it can be burst due to the pressure of this expansion, causing damage. This causes considerable costs around the world, including labour costs in repairing and lagging pipes . and equipment, repairs and clean up to water damaged buildings and • :- · · · .. ..... ' . -:¾ - .!=:yr·; infrastructure, and energy costs in keeping pipes and equipment warm in cold weather. It also adds complication to many devices and systems with need to be frost protected, sometimes due to the necessity of running closed circuit systems filled with liquid antifreeze. .- ··..: -- . -., .· :: , ' .1 · - --.::r ''· . ;; .· ’'.= -- ,· _ . vPi'- .. . ...==Y= ' ’.....-:--- - - ^:Υ==Γ:=:''';: = ^-^:===== = “ : ---.-,-== ' V === = '

SmTEMENT OETHE INVENTION..... :· - · ; · “ .¾¾¾ ; To overcome these problems, the preseritjinventlon is a method of - = ; producing pipes and other water filled devices that don't burst when '" · · · V . ' ’K..v ··' - "·:χ "ΐ ·,. -I: ,',-r - . · = = : - = = frozen, and aren't damaged when frozen. This method can be incorporated into the production of new pipes and other water filled devices, and also retro-fitted to existing pipes and other water filled devices. An internal sealedeiFpocket or pockets is incorporated into the design of the pipes or other water filled devices, such that it compresses and relieves the pressure caused by the expansion of freezing water.

When the water melts the pocket or pockets expand back to the original size and shape. These air pockets can be constructed in severil ways, such as by Using closed cell foam, an Internal coating Of flexible rubberoid material or gel or flexible air containing sealed rubber or plastic reservoirs. -.= ' ' -:, =:. ,- -:=- ,..:-. . - ...·· .. -= '· i!

• I . -. . - 5 -· ·* : .,-- = =::===1/===. . - === = ;is: ' =/=- = .= -ν': . /= - - -. -= / ' .' .:=,,. ... .-- - .. .; : = . ,. -r . . , ; = «,' =:. -:ϊ ·· 9;} ' > 9':·’ i /¾ VK-, ’. ·.'/; .,/r/-;v- -Λ'·.·. ‘·?9\: ” / :Jv; ,; ·:ι;ν~ ......1- '·ρν./// 4 =Β. \ · · ; ? ····.. = ’ -V. . -":>·.·> ..'.'-η·/· · ·ί · .· .··· ..; ; · ··' ·'' : - ·:: ·.::·* ·[··.':"; ~ •'V ·-·>·· '" Γ -- '· · .¾ ·-' : i:V . 'λ" ' - ·’’ " ' ... V . ·:·^···' ··;;·:. -=4::, ' ·ί 'Λ, . " ': • ·" 's " ."·«· '.· ; ; ? ···: ' -..-=== ί ·. ··,.' '··. ·>'·;: Vi·.. “·<- • ..* · ‘ . > · · ’ " · ; -.4- :ΉΤ ·>. ' ν ·:" 'ν. V- 7 s"'/;=

Tits invention ^presents a simple and low cost way to produce pipes and other water filled devices which won’t burst when frozen. It can also be fitted to existing pipes and water filled devises. This has the .: ΊΛ-'*......--...... .::- ,.-::1 -:. . ,*> , -si# following advantages: - The pipes and other water filled devices can simply be left to freeze* -¾ with no fear ofidamage. :r:''A8,;?. ==- -- Initial design and installation of pipes and other water fiile| devices can be made much simpler, as lagging and other freeze protection ’. methods are not necessary. --/ A -V/ ' , :-·. * : - =; -- Large cost savings as buildings and other sites can be left un-heated in cold weather withno fearofdamageduetofreezing. · «Many spterhs such as solar panels are designed with closed circuits filled with antMreeze, making them complicated and less efficient. a These can be rpadf simpler and normal water used. »- It is simple: new water pipes and other water filled devices can be : ...... :·.·· . . : l!. mass produced at litt le extra cost to the existing ones. " ' :: V:-.J. -, -: V- I?.,··,' J!U ? ' - it is "fit and forget". 5 1 . -- Additional repair costs and clean up costs due to damage by freezing are eliminated. , - :-/ .it .- ... ; .., : :-i:- · ‘ ;: / - ., ‘-Γ :r '

Examples of the invention will now fee described fey referring to the accompanying drawings: V- ' h -:'ΐ-Ή, -

Figure 1; Examples of extruded plastic pipes incorporating internal expansion spaces or pockets. These are snoWn frt cross section.

Figure 2: Examples of extruded plastic pipes incorporating internal / :----. -= ·. . t .... - ' · ‘ > - :- ' . :> ·.. : - .- ·:··/. • --=-/=- -- = ' = - :.- ;

^-V: νΐ;’ . - ,.: . . . - ’ -.. yi'-’· .-.'iMV ' V : ·.. ' ·.· ' V'igrV ,, .., -Ϊί^-.C·;·!, 1' ;:-'V v· 'w,·.' . .· ··<;' ·· ' ·: '·= - -V '··.'· *'-C ' , "'< ’ .> · , ·· r!· Ί" · .. ·<·:.. ., . '* . · ·.! . ·: . ·-. .-.*/ ·.·;,·· · -· .,---: · . .: . ·. :./ -f,?··. · ·· - , ' v · ? ‘ ·...«,·· ·* ' -r-V''·- ., . ;f: : . ΐ , .,: f; φφ .·φ ° ·, .ι.φ .¾, J- -¾. ' ΑΚ ., dosed cell foam, to allow for expansion, shown in cross secton.

Figure 3: Examples of closed cell foam devices for protecton of pipiisr - -:,, · ' , · ' ' ' J :5 ' and inserted into pipes, shown in cross section. . · . · ·*’' ... · : . yr- . . <! " ' " Ί\}ψ -.,.- ·:., ·.' · .1 . . .·' -· ··· : .

Figure 3.A: A closed cell foam tube inserted into a water pipe, along the length of the pipe, - ; v r V' 'l/V - - ,. ·\^ <, . Af- ,. ;7. "4./ . ^4·····^Γ

Figure 3.B: A closed cell foam "rod" inserted into a I wafer pipe, along the length pf the pipe, and ^ bonded to the pipe wall, 4 | :

Figure 3.C: A closedceil foam "rod” inserted into a water pipe, along the length of the pipe, and not bonded to the pipe wall.

Figure 3.D: A closed cell foam "rod” inserted intoa water .f? -Λ -. :,v ' '""v ' " . ·:·.;; A-.::. · .Xf pipe, with radial vanes^to locate and/Offix it inside the water pipe. 7¾

Figure 3.E: A closed cell foam "rod" inserted intoa water pipe witha flexible vane re locate and/or fix . it in position inside 7;.1 φ···^.'::φ.: .¾ the pipe . , '

Figure 3,F; Sketch of the example shown in Figure 3.E 7

Ftgure4: Examples of collapsable air Of gas filled pipe inserts, made of soft flexible material such as plastic or silicon rubber, and inlerted into pipes, shoytfn in cross section.

Figure 5: Examples of other water filled devices fitted with closed cell foam or gas filled internal pockets to prevent damage from freezing, shown in cross section. ;· . ' '‘Λ , .·. ,,. . ' . -.'TL,.

Figure 5.M Schematic of aradiator of solar panel or other device header tank, fitted with internal closed cell foam or gas pockets to protect from damage from freezing. c

Figure 5.B: Cross section sketch of a Water tap with a built in closed cell foam or gas pocket to prevent damage from freezing. ; ·' ' -·: ' ;'· .·. 1-.; -'.v ^ " · 'ν' '1 ' ; '$· V (. . '

The drawings are labelled a$ follows: 1. Water Pipe Wall j 2. Gas filled expansion chambers or pockets i :

r/' 3.Water V 4. dpsed Cel Foam - ; 74/-:-- 5. Bond or Adhesive ^ : 4/ ' · i ' ., " . :ir .= :·< . |F >>ί\Λ " 5 .·, · . i' 'V-':> - V"” " ' . " ' : 'S'f“ ., : . -«f '7 -«7. ,v:.: ..,Ifc f : . - -v’'t .'r’7 . · - K ‘ '14 ’> A -:p ;·< s-·.....ϊϋώ ·> · ' - ··.''' v»·;fj f ' 4 >·.. · '·’ 4J4/°- 7 ;· 744 ' . -'ifN*'" ' - ψ " /. . ,- S; ·. , , ^ :-. · ' ''VjT/j-·’' >->: ~ :.., ' ·..' i> · ,. . ' , ; ; « 44 ' , fK:f~g ‘ " ^C- " -7 2; -- ' ·:[· -. .· ' "/ :· - -.- / . . ' .·. / .,, ;·:· . 'V - ·- ; :!,· . /44/ :.4.- .-if·44 444. ’ : · y--' ^-4/4‘ 4"v ^4/- :44 '4:;i-4 -¾ -- -4-... ./ . " „ ' 4 ' / - ; r ' ' , J· ’ ~ . ' . .,7

• ' 4 '4 · /:4-..: ' -4.V ” .-\J: . ‘ 4 - "· - ·· V;· ·, - · - ,., .- . . --444--.4,: ~ ..:4-/- · .. / - , -· - - ,.:, - -·. , ,· ' -· , ’ ·.. ·· i.-',.--f··'- : . :; v; ... - v λ '., = ·'? - ,44- . . --/4 ,. ·:···· ‘ :>4,:;; ·"'· <4. v4 ' — " ·' 4 " , ' -4 7-· ; ^:4:4- ":44-· ' \:-.4 ' .. 4-: . */., . " "'V* . '·“ Ϊ - ' -- ^ ''··' · · " i-S’* ' . ,'··.·ί , . . ., DESCRIPTION ' '

This invention represents a method of producing pipes or other water filled devices which won’t be damaged when frozen. The water pipes or other Water filled devices incorporate an expansion space inside which allows the water to expand when it freezes. When it melts, the internal expansion space returns to it’s original size, ready for the next tirpe the water freezes, This prevents damage due to the approximate 10% increase in size of water when it freezes. The expansion space should be 10% of the water fillpd volume, to fully alldw for the expansion of :¾ ¾ freezing water. .: .. ,.. ...,.^¾¾.¾^.. ,... "Sti

This expansion space can be a single or multiple air filled pockets or voids, or a closed ceii foam or a soft rubberoid or gell coating or similar. λ "" . t _·. ;V<i - i:: < ;··-. ? >: · :.:'i .... ' ··'·

These pockets or voids can be incorporated into pipes or other water filled devices wbenithey are manufactured, or retro-Titted to existing i pipes and other water filled devices. : * -ft . · 'V-

Figure 1 shows exaiijples^-of extruded piasti^plp^ incorporating intemal expansion spaces or pockets. These are close to the Inside surface of the pipe. As the water freezes, it expands, and these pockets collapse with the flexible nature --ofthe plastic pipe wails, preventing damage to the outside wall of the pipe. When the water melts and the pressure releases, the air pressure inside the pockets expands them back to their original shape.

When the pipe is cut to length and used, the joining devices at the ends • ; > . . ·' -¾. of the pipe must incorporate a method of sealing the ends of these expansion voidsjto seal in the air. ' . - - V; - - · ...r- - .... ' ^

Alternatively, if these voids are constructed during manufacture so they are made in short sealed lengths along the pipe, say in 5 or 10 cm lengths for example, the pipe can then be cutto any length for use. , i >

Only the voidset the very ends of the pipe will be broken open when • ·- '·.·!· -r;-.r .· ~ . '-77 ' ν - ' :>, cut. The pipe could also be marked to show the voids, so it could be cut off so that no voids are broken open. " - · ' ·-· ‘' ·.. r ' 'fy'Si&amp;sS.1 ,

Figure 2 shows similar extruded plastic pipe, but incorporating zones of closed cell foam inside, rather than seperate air filled voids. This foam would compress when the water freezes, and expand when it melts.

The pipes can then be cut off to any length for use. Alternatively to the zones of closed cell foam, these could be made of a coating of rubberoid materiel or gel.; -a--

Figures 3 and 5 shows a similar closed cell foam freeze protection method or devlce, but rather than being extruded into the structure of a pipe, these area separate device, madeseparateiy and which can be inserted inside, along the length of a ^ipe made of any material, or into i » v other water filed devices. The foam inserts can bemade inany shapepr : ^ size, to suit the nature of the application. Two examples other than pipes are shown in figure 5. 7

These inserts can be installed when manufacturingnew pipes or other water filled devices^ or retrorftted to existing orse$w . -r7„ 7

Figure #shows similar Inserts using air filled tubes; or, pockets, made of flexible material such as plastic or silicon rubber. These inserts could be s made in standard sealed lengths, or the air pockets could be made in %,r r short sealed lengths (like a string of sausages, flexible or non-flexible), % say 5 or lOcrft for example, so they can^e cut off to suit ahyrapplication. ...» J · ·-· <. · · - .:- ·. : . \ 11V **&amp;:<: ; .--

The closed cell foam or air pockets should have the following properties: 7

' ' ' . A 7*. * · .i|S - Inert to water or any other chemicals pr contaminants which may be ' in the pipes, Will not degrade over time. 7 : ^377^ - · ·· I;;.;·.. ‘ - ' v . · · , -- long lasting '77 77 -. ;77"· ,:7,-.---¾. .. ' ' 7 ,- '7;., -,. ., ' 7- ' --- . - - - They should not collapse under the full operating pressure of the water in the system, but they should collapse under pressure when the water freezes, this pressure should be less than that which will cause damage. ' ‘ ' ' :- ' : 7 ·" - 7' . . ''*% - · V.v _ . - ''' ’ : -s- .. . 7 ,. . 7" 7-· - . ’ -J,' · ' · '7-7,, · '37' ‘ (·;· - : .¾¾ - ”... ..- 7f7 . «:ϊϊ,,.·-- ...:.:- ...... ... . · .. s, - They will not move with, or block theflOw of the water • ' ' j: : · = : · _v ,¾.. - Be large enough to relieve the pressure caused by the approximately 10%expansi0hof water when it freezes: ^ ^ - ·. 'jX.y.j': · .-jlQf- \·· : ’ · ' · * ;'rK -. .::, ' - '' ·. - - ‘ ' ' ’' - , » , ; , . - . . . . '·' *·· - ·'· ; ;·i ; , -* .,· v' ·- V ·: · ..Ύ, .y "· -. "f:" ψ ':- - · V '. ' ··“.· " ’ ' · : ' ·.-' ' ·. ' .- ' ν·. . . : . 'Λ .,-- - :.. , :.,:-¾¾¾ ..:---4:-. ·. v-- . v v -'λγ···; > :, . , -, ---,¾ V" - · . ,- ··· " ’ ‘ ' *. . --- ; ;(/ -. ...... -¾¾ .. , , . , ‘. -:-:/---..:-.¾. . '-. " Λ : :V- ·ν·

Claims (5)

  1. CLAIMS * 1. A method of protecting water pipes add other water filled devices from damage by freezing using interna! expansion pockets. ί ’· '"7'λ ^X'·.-·· ·:·:7:··ν :· · -A.vi.· :-V .7 . : ^ .. . . 'v' ·" · .. . : ’ 4 ; . ” ·i*
  2. 2, An extruded pipe according to claim 1, in which longitudinal air or gas 1 ’ . .ί ’ ' '·,γ: .- " ' -v,' . pockets are incorporated into the internal pipe wall, to allow for the water to expand when it freezeswithoutdamagmg the pipe.
  3. 3. An extruded pipe according to claim 1, in which a longitudinal dosed ϊ cell foam structure is incorporated into the internal pipe wall, to allpw I for the water to expand when it freezes without damaging the pipe. i 4kA pipe according to claim 1, in which the internal wails are coated with a flexible rubberoidor gei coating,toaliow for the water to expand when i freezes without damaging the pipe , r
  4. 5. A closed cell foam insert according to Claim 1, which can be fitted inside pipes or other water filled devices to allow for the water to expand when itfreezes without causingdamageto the pipe or other water filled devices.
  5. 6. An air or gas filled flexible "pipe'' or air pocket made of flexible material according to claim 1, which can befitted inside pipes Or other water fiiied deylces fO allow for the water to expand when it freezes * withoutGaysin^
GB1613218.5A 2016-08-01 2016-08-01 A frost or freeze protection device and method for water pipes and other water filled devices or objects Withdrawn GB2552662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1613218.5A GB2552662A (en) 2016-08-01 2016-08-01 A frost or freeze protection device and method for water pipes and other water filled devices or objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1613218.5A GB2552662A (en) 2016-08-01 2016-08-01 A frost or freeze protection device and method for water pipes and other water filled devices or objects

Publications (2)

Publication Number Publication Date
GB201613218D0 GB201613218D0 (en) 2016-09-14
GB2552662A true GB2552662A (en) 2018-02-07

Family

ID=56936695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1613218.5A Withdrawn GB2552662A (en) 2016-08-01 2016-08-01 A frost or freeze protection device and method for water pipes and other water filled devices or objects

Country Status (1)

Country Link
GB (1) GB2552662A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189710030A (en) * 1897-04-22 1898-03-26 James Elijah Brindley
GB2085110A (en) * 1980-07-30 1982-04-21 Bicc Ltd Protecting Pipes Against Bursting
US4484594A (en) * 1983-06-24 1984-11-27 Roy Alderman Freeze guard valve
GB2167827A (en) * 1984-12-03 1986-06-04 John Henry Richmond Fluid expansion containment arrangements
GB2201483A (en) * 1987-02-27 1988-09-01 David Alexander Holt Protection of water pipes
US4773448A (en) * 1987-02-26 1988-09-27 Francis Norman L Freeze-resistant plastic pipe and method for its manufacture
GB2206666A (en) * 1987-07-08 1989-01-11 Leslie Ricketts Expansion absorbing device
JPH01169025A (en) * 1987-12-25 1989-07-04 Hitachi Ltd Anti-freeze damage pipe
JPH01230824A (en) * 1988-03-09 1989-09-14 Tadao Watanabe Preventer for water pipe bursting due to freezing
GB2216623A (en) * 1988-03-05 1989-10-11 Keith Malcolm Charles Greig Pipe protection means
GB2310701A (en) * 1996-03-01 1997-09-03 Pali Rao Pipe protection from bursting by freezing
US6338364B1 (en) * 1999-09-01 2002-01-15 Burke H. Mendenhall Insert for freeze protecting water pipes

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189710030A (en) * 1897-04-22 1898-03-26 James Elijah Brindley
GB2085110A (en) * 1980-07-30 1982-04-21 Bicc Ltd Protecting Pipes Against Bursting
US4484594A (en) * 1983-06-24 1984-11-27 Roy Alderman Freeze guard valve
GB2167827A (en) * 1984-12-03 1986-06-04 John Henry Richmond Fluid expansion containment arrangements
US4773448A (en) * 1987-02-26 1988-09-27 Francis Norman L Freeze-resistant plastic pipe and method for its manufacture
GB2201483A (en) * 1987-02-27 1988-09-01 David Alexander Holt Protection of water pipes
GB2206666A (en) * 1987-07-08 1989-01-11 Leslie Ricketts Expansion absorbing device
JPH01169025A (en) * 1987-12-25 1989-07-04 Hitachi Ltd Anti-freeze damage pipe
GB2216623A (en) * 1988-03-05 1989-10-11 Keith Malcolm Charles Greig Pipe protection means
JPH01230824A (en) * 1988-03-09 1989-09-14 Tadao Watanabe Preventer for water pipe bursting due to freezing
GB2310701A (en) * 1996-03-01 1997-09-03 Pali Rao Pipe protection from bursting by freezing
US6338364B1 (en) * 1999-09-01 2002-01-15 Burke H. Mendenhall Insert for freeze protecting water pipes

Also Published As

Publication number Publication date
GB201613218D0 (en) 2016-09-14

Similar Documents

Publication Publication Date Title
US5996643A (en) Foam insulation system for pipes
US2629402A (en) Antiburst tube for pipes
ES2292109T3 (en) System and method for sealing an opening in a wall through which is inserted at least one transport device such as a cable, conduit or tube.
SK279715B6 (en) Apparatus and method for introducing sealant into a clearance between pipes
BRPI0610881B1 (en) Method of Preparing an Insulated Tube-in-Tube Assembly and Insulated Tube-in-Tube Assembly
US2759254A (en) Method of connecting fluid pipes
CN1126443A (en) Pipe shut-off device with a sheet metal casing that may be bent around a pipe
CN101855483B (en) Fire-stop system for placement in a conduit through which a thermally weakenable pipe extends, method for placing the system and conduit provided with such a system
EP0682204A1 (en) Pipe blocking technique
ES2347893T3 (en) System and method for sealing in a conduit a space between an inner wall of the conduit and at least one pipe or cable extending through the conduit.
US4649959A (en) Antiburst system for water lines
CN1366592A (en) Sealing tip for tubular conduit
US20090242062A1 (en) Fluid transfer tube
WO2005003615A1 (en) Connector seal comprising rachet teeth
JP5140153B2 (en) Method and system for sealing an annular gap between a fixed conduit and a pipe, tube or duct made of a thermoplastic material extending into the conduit
EP0916058A1 (en) Sealing a clearance between a host pipe and a liner pipe
ES2306389T3 (en) Device control liquid flow.
US6267261B1 (en) Cavitated insulating support base for hot water tank
US3241571A (en) Test plug
CA2325181A1 (en) Method of and a sealing element for sealing a gap
HUT72527A (en) Hollow sealing
CN102953738B (en) Method and system for automatical antifreezing and thermal insulating of tunnel lining in high and cold areas
ES2267686T3 (en) Pipe fitting.
US8261558B2 (en) Self-adjusting insulation, including insulation particularly suited for pipe or duct
FR2478161A1 (en) Frost-resistant pipe for domestic water feed - contains e.g. tube of compressible sealed cellular material which contracts when ice forms

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)