EP0332661A1 - Joint soude pour tuyau - Google Patents

Joint soude pour tuyau

Info

Publication number
EP0332661A1
EP0332661A1 EP88901052A EP88901052A EP0332661A1 EP 0332661 A1 EP0332661 A1 EP 0332661A1 EP 88901052 A EP88901052 A EP 88901052A EP 88901052 A EP88901052 A EP 88901052A EP 0332661 A1 EP0332661 A1 EP 0332661A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
pipe
welded
pipe joint
pipes
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Withdrawn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
EP88901052A
Other languages
German (de)
English (en)
Inventor
Göran Sundholm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0332661A1 publication Critical patent/EP0332661A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints

Definitions

  • the present invention relates to a welded pipe joint comprising a sleeve for receiving the end portion of at least one pipe to be joined, said sleeve being, at the respective end thereof, welded to the respective pipe.
  • the pipe joint according to the invention is mainly characterized in that in the wall of the sleeve, at the pipe received therein, there is formed a through- going boring for introducing a lubricant, and that a pe ⁇ ripheral groove is formed in connection with said boring for distributing the lubricant.
  • the boring is preferably positioned in the vici- nity of the sleeve end and it is threaded, as well as a nipple for the lubricant.
  • the groove may be formed either on the inside of the sleeve or on the outside of the pipe. The latter alternative facilitates correct po- sitioning of the pipe end.
  • the lubricant usually oil, forced in prior to the pickling prevents the corrosive pickling acid from entering in between the pipe and the sleeve. Oil im ⁇ pacted during the flushing and regular operation pre- vents impurities from gathering in the gaps at the end faces of the pipes.
  • Figure 1 is a partial longitudinal section of a first embodiment of a pipe joint according to the inven ⁇ tion.
  • Figure 2 is a cross-sectional view along the line II-II shown in Figure 1.
  • Figure 3 is a partial longitudinal section of a second embodiment of a pipe joint according to the in ⁇ vention.
  • Figure 4 is an enlarged longitudinal section of the area A in figure 3.
  • Figures 5 and 6 illustrate a preferred method of cutting a pipe, figure 6 being a cross-sectional view along the line VI-VI in figure 5, for the embodiment of figure 3.
  • the reference numerals 1 and 2 designate two pipes to be joined.
  • 3 designates a sleeve with a central annular shoulder 4 formed inter ⁇ nally therein; 5 and 6 designate weld joints at both ends of the sleeve 3.
  • 5 and 6 designate weld joints at both ends of the sleeve 3.
  • annular gaps 7 and 8 between the end faces of the pipes 1 and 2 and the shoulder 4, and nar- row clearances 9 and 10 between the pipes and the sleeve.
  • the annular gaps 7 and 8 are required in order to permit linear expansion of the pipes 1 and 2 within the sleeve during the welding operation.
  • the gaps 7 and 8 as well as the clearances 9 and 10 have caused an insolvable problem.
  • the internal cleaning is carried out by means of a pickling liquid, i.e. acid, whereafter flushing is effected with a neutralizing liquid.
  • the neutralizing liquid is not able to remove the pickling liquid from the clearances 9 and 10 which results in that the weld joints 5 and 6 in particular are gradually corroded internally.
  • the gaps 7 and 8 gather impurities which come loose during the regular operation in more or less large lumps which cause serious disturb- ances.
  • the present invention solves the problem by means of lubricant nipples 11, 12 provided in borings formed in the wall of the sleeve 3.
  • Peripheral grooves 15 and 16 are arranged in connection with the borings for the even distribution of a lubricant, usually oil, injected through the nipples 11 and 12 around the pipes 1 and 2.
  • Conduits in the nipples 11 and 12 are designated with 13 and 14.
  • the grooves 15 and 16 are formed on the inside of the sleeve 3.
  • the broken line 17 designates the bottom of the annular groove 15.
  • nipples 11 and 12 Prior to and possibly also during the pickling oil is introduced through the nipples 11 and 12, so that it fills the clearances 9 and 10 and passes out through the gaps 7 and 8, thus preventing the pickling liquid from entering the gaps 9 and 10. During the flushing and regular operation, the oil prevents impurities from gathering in the gaps 7 and 8.
  • the nipples 11 and 12 are preferably screwed into each boring in the shell of the sleeve 3.
  • the embodiment of figure 3 differs from the one of ' figures 1 and 2 in that the peripheral grooves in connection with the boring through the wall of the sleeve 3 are formed on the outside of the pipe ends re ⁇ ceived in the sleeve.
  • the groove of the pipe 2 is de ⁇ signated 20.
  • the screw 23 has a hexagon socket 24 and a cone point 25.
  • An expansion ball 28, preferably of metal, is forced into the socket 24 by means of a tool 26 with a magnetic head 27.
  • a protective gas can be introduced through the boring of the sleeve 3 in order to reduce the formation of slag and oxides on the internal surfaces later to be cleaned.
  • the protective gas can be fed in through nipples like 11 and 12, or by providing the screws 22 and 23 will feed bores, or by using separate means to be fitted into the borings through the wall of the sleeve 3.
  • the invention can, of course, be applied to vari- ous branched joints as well as to the straight joints shown in the drawing, or to a joint with only one pipe end, if one end of the sleeve 3 is joined to a fixed connection, e.g. a pump.
  • Figures 5 and 6 schematically illustrate one way of providing the outer pipe surface with a groove at a predetermined distance from the pipe end.
  • Refernce nume ⁇ ral 30 designates a cutting wheel
  • numerals 31, 32 and 33 designate supporting wheels each provided with a pe- ripheral edge 34, 35 and 36, respectively.
  • a fourth sup ⁇ porting wheel is behind the wheel 32 in figure 5.
  • the cutting wheel and the supporting wheels are interconnected and rotate together around a pipe to be cut. While the cutting wheel cuts through the pipe the peripheral edges of the supporting wheels form grooves 20 and 21, each at a predeterminal distance from the pipe end.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Earth Drilling (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Cleaning In General (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Un joint soudé pour tuyau comprend un manchon (3) soudé (5, 6) par chacune de ses extrémités au tuyau correspondant (1, 2). La paroi du manchon (3) fixé à chaque tuyau est pourvue d'un alésage dans lequel est disposé un nipple (11, 12) pour l'huile. Une rainure périphérique (15, 16) est disposée en connexion avec chaque nipple, de façon à s'étendre autour du tuyau correspondant (1, 2). De l'huile introduite par les nipples (11, 12) empêche que de l'acide décapant n'entre dans les espaces libres (9, 10) compris entre les tuyaux (1, 2) et le manchon (3) et que des impuretés ne s'amalgament dans les interstices (7, 8) situés entre les faces terminales des tuyaux et un épaulement central (4) formé à l'intérieur du manchon.
EP88901052A 1987-01-30 1988-01-28 Joint soude pour tuyau Withdrawn EP0332661A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI870423 1987-01-30
FI870423A FI75040C (sv) 1987-01-30 1987-01-30 Svetsad rörförbindning.

Publications (1)

Publication Number Publication Date
EP0332661A1 true EP0332661A1 (fr) 1989-09-20

Family

ID=8523872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88901052A Withdrawn EP0332661A1 (fr) 1987-01-30 1988-01-28 Joint soude pour tuyau

Country Status (10)

Country Link
US (1) US4961598A (fr)
EP (1) EP0332661A1 (fr)
JP (1) JPH02502036A (fr)
KR (1) KR890700778A (fr)
CN (1) CN1030284A (fr)
AU (1) AU1227288A (fr)
DK (1) DK539188D0 (fr)
FI (1) FI75040C (fr)
NO (1) NO884283D0 (fr)
WO (1) WO1988005881A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0575581U (ja) * 1992-03-16 1993-10-15 株式会社フジタ 銅配管用接続金物
US5364281A (en) * 1993-06-01 1994-11-15 Philly D. Harrison Electrical connector system for grounding member and ground wire
IT1264905B1 (it) * 1993-07-09 1996-10-17 Saipem Spa Metodo per posare condotte sottomarine in acque profonde
DE202006015784U1 (de) * 2006-10-12 2008-02-14 Mann + Hummel Gmbh Filtereinrichtung
CN101270841B (zh) * 2007-03-22 2010-12-08 北京安科管道工程科技有限公司 带有冷却槽法兰的内涂层连续管道及其连接方法
JP2011145049A (ja) * 2010-01-13 2011-07-28 Masuda Denki Kucho Kk 多層階建物における冷媒配管工法と冷媒配管ユニット
CN102069067A (zh) * 2011-01-13 2011-05-25 于海滨 一种振动筛的筛条及其制作方法
ITVR20120134A1 (it) * 2012-07-03 2014-01-04 Gianfranco Natali Metodo per la preparazione alla verniciatura di telai metallici di cassoni di veicoli e di telai metallici di veicoli, costituiti da una pluralità di parti connesse reciprocamente
JP5994039B1 (ja) * 2013-09-06 2016-09-21 ジョン ウー カップリング カンパニー， リミテッド 溶接継手連結用管コネクタ
CN103464915B (zh) * 2013-10-08 2015-07-08 俞子朗 一种不同直径铝合金管道的焊接连接方法
CN103464914B (zh) * 2013-10-08 2015-07-08 俞子朗 一种相同直径铝合金管道的焊接连接方法
DE102014109799A1 (de) * 2014-07-11 2016-01-14 Hobas Engineering Gmbh Rohrkupplung
US11193337B1 (en) * 2016-11-21 2021-12-07 Pruitt Tool & Supply Co. Method and device for connecting to a conductor pipe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA716467A (en) * 1965-08-24 Presswerk Wessel And Co. Method of producing sealing and/or releasable and/or non-releasable interconnection between two pipe members
US1816770A (en) * 1925-05-27 1931-07-28 Firm Mannesmannrohren Werke Welded spigot and socket joint
CH120180A (de) * 1926-07-27 1927-08-16 Sulzer Ag Einrichtung bei Verbindungen von dicken Blechen zum Prüfen ihrer Dichtheit.
CH167884A (de) * 1933-05-24 1934-03-15 Buss Ag Uberlappende Blechverbindung.
DE679500C (de) * 1936-12-25 1939-08-07 Mannesmann Ag Schweissrohrverbindung
US2855224A (en) * 1951-05-28 1958-10-07 Reed Roller Bit Co Lubricated conically tapered drill stem joint
US3600010A (en) * 1969-04-01 1971-08-17 Williamson Inc T Pipe coupling
GB1384614A (en) * 1971-07-09 1975-02-19 Bagnulo L Pipe sections having a continuous internal lining for the formation of conduits by welded joints
DE3436254C2 (de) * 1984-10-03 1986-10-23 MANIBS R. Mannesmann GmbH & ibs Nagel GmbH & Co KG, 5630 Remscheid Verfahren und Dichtung zum Verbinden von Rohrenden einer bereits benutzten Gasleitung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8805881A1 *

Also Published As

Publication number Publication date
DK539188A (da) 1988-09-28
NO884283L (no) 1988-09-27
JPH02502036A (ja) 1990-07-05
FI75040C (sv) 1988-04-11
CN1030284A (zh) 1989-01-11
NO884283D0 (no) 1988-09-27
WO1988005881A1 (fr) 1988-08-11
FI75040B (fi) 1987-12-31
DK539188D0 (da) 1988-09-28
KR890700778A (ko) 1989-04-27
AU1227288A (en) 1988-08-24
FI870423A0 (fi) 1987-01-30
US4961598A (en) 1990-10-09

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