FR2564018A1 - Improved welding process for butt welding pipework - Google Patents

Improved welding process for butt welding pipework Download PDF

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Publication number
FR2564018A1
FR2564018A1 FR8506962A FR8506962A FR2564018A1 FR 2564018 A1 FR2564018 A1 FR 2564018A1 FR 8506962 A FR8506962 A FR 8506962A FR 8506962 A FR8506962 A FR 8506962A FR 2564018 A1 FR2564018 A1 FR 2564018A1
Authority
FR
France
Prior art keywords
ring
pipe sections
welding
pipes
butt
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Withdrawn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
FR8506962A
Other languages
French (fr)
Inventor
Leslie Carrick
Anthony Bell Hick
Anthony James Wareing
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.)
Sellafield Ltd
Original Assignee
British Nuclear Fuels PLC
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 British Nuclear Fuels PLC filed Critical British Nuclear Fuels PLC
Publication of FR2564018A1 publication Critical patent/FR2564018A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/0203—Inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
    • B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

Abstract

A band of weld material is placed at the ends of the two pipes to be joined. The band is grooved to accept the pipes and, by preference, has a triangular profile. The top of this profile acting as a guide for the welding torch. The inside diameter of the band is essentially equal to the inside diameter of the pipes to ensure correct penetration and joining during welding. A template or support may be used to maintain the ends of the tubes in the grooves during the welding operation allowing the operator greater freedom of operation. Welds formed in this manner are also claimed.

Description

La présente invention concerne le soudage et en particulier un procédé de soudage bout à bout de tronçons de tuyauterie. The present invention relates to welding and in particular a method of butt welding of pipe sections.

On connaît déjà l'utilisation d'éléments rapportés consommables destinés à former la base des soudures bout à bout des tuyauteries. Les éléments rapportés consommables nécessitent une découpe à la longueur, la mise sous forme de bagues du diamètre nécessaire et le montage sur les tuyauteries. Il peut s'agir d'une opération longue et difficile. The use of consumable inserts intended to form the base of the butt welds of the pipes is already known. The consumable inserts require cutting to length, forming rings of the necessary diameter and mounting on the pipes. It can be a long and difficult operation.

L'invention concerne un procédé de soudage bout à bout de tronçons de tuyauterie qui comprend la formation d'une bague d'un matériau de soudure ayant des faces d'extrémités se trouvant dans une partie radialement interne de la bague, la formation des tronçons de tuyauterie avec des faces complémentaires aux faces profilées d'extrémités de la bague, l'introduction de la bague entre les tronçons de tuyauterie, le rapprochement des tronçons de tuyauterie afin qu'ils maintiennent la bague entre eux, une partie radialement externe de la bague entourant les extrémités des tronçons de tuyauterie, et la fusion de la bague afin que les tronçons de tuyauterie soient soudés bout à bout. A method of butt welding pipe sections includes forming a ring of welding material having end faces located in a radially inner portion of the ring, forming the sections of piping with faces complementary to the profiled end faces of the ring, the introduction of the ring between the pipe sections, the bringing together of the pipe sections so that they hold the ring together, a radially external part of the ring surrounding the ends of the pipe sections, and the fusion of the ring so that the pipe sections are welded end to end.

Le procédé comprend de préférence la réalisation de la bague avec un diamètre interne pratiquement égal au diamètre interne des tronçons de tuyauterie, et la formation d'une cavité à chaque face d'extrémité de la bague, à la périphérie interne, afin que des sièges soient formés pour les extrémités des tronçons de tuyauterie. La partie radialement externe de la bague entourant les extrémités a avantageusement une section triangulaire. The method preferably comprises making the ring with an internal diameter practically equal to the internal diameter of the pipe sections, and forming a cavity at each end face of the ring, at the internal periphery, so that seats are formed for the ends of the pipe sections. The radially outer part of the ring surrounding the ends advantageously has a triangular section.

D'autres caractéristiques et avantages de l'invention ressortiront mieux de la description qui va suivre, faite en référence au dessin annexé sur lequel
la figure 1 est une coupe longitudinale d'un ensem hie comprenant une bague de soudure placée entre les extrémités de deux tuyauteries ; et
la figure 2 est une coupe suivant la ligne A-A de la figure 1. Other characteristics and advantages of the invention will emerge more clearly from the description which follows, given with reference to the appended drawing in which
Figure 1 is a longitudinal section of a set comprising a weld ring placed between the ends of two pipes; and
Figure 2 is a section along the line AA in Figure 1.

Une bague 1 de soudure est formée avec des cavités ou feuillures 2 et 3 à ses faces d'extrémités. Des tronçons de tuyauterie 4 et 5 qui ont été préparés avec des bords complémentaires bien perpendiculaires, se logent dans les cavités ou feuillures 2 et 3. Le diamètre interne de la bague est pratiquement égal au diamètre interne des tronçons de tuyauterie, et le diamètre de chaque feuillure est pratiquement égal au diamètre externe des extrémités des tronçons de tuyauterie, sans être inférieur. La partie de la bague 1 qui entoure les tronçons de tuyauterie a de préférence une section triangulaire, le sommet 6 du triangle se trouvant dans le plan transversal de symétrie.Bien que la partie externe de la bague puisse avoir d'autres formes, par exemple limitée par un demi-cercle, une section triangulaire est avantageuse car le sommet 6 constitue une référence visuelle pour le soudage manuel ou pour le positionnement d'une tête orbitale de soudage qui assure la fusion de la bague sur les extrémités des tronçons de tuyauterie. Un support ou dispositif de montage peut assurer le maintien des tronçons de tuyauterie dans les cavités ou feuillues pendant l'opération de soudage. Les tronçons de tuyauterie peuvent être maintenus à distance initialement, et la bague peut être montée sur l'extrémité de l'un des tronçons, par disposition de l'extrémité de ce tronçon dans la feuillure d'une face d'extrémité de la bague.L'extrémité de l'autre tuyauterie est alors déplacée afin qu'elle se loge dans la feuillure de l'autre face d'extrémité de la bague. La bague est ainsi maintenue en place et permet à un opérateur d'effectuer librement l'opération de soudage. A weld ring 1 is formed with cavities or rebates 2 and 3 at its end faces. Pipe sections 4 and 5 which have been prepared with complementary perpendicular edges, are housed in the cavities or rebates 2 and 3. The internal diameter of the ring is practically equal to the internal diameter of the pipe sections, and the diameter of each rebate is practically equal to the external diameter of the ends of the pipe sections, without being less. The part of the ring 1 which surrounds the pipe sections preferably has a triangular section, the apex 6 of the triangle being in the transverse plane of symmetry. Although the external part of the ring can have other shapes, for example limited by a semicircle, a triangular section is advantageous because the vertex 6 constitutes a visual reference for manual welding or for the positioning of an orbital welding head which ensures the fusion of the ring on the ends of the pipe sections. A support or mounting device can maintain the pipe sections in the cavities or hardwood during the welding operation. The pipe sections can be kept at a distance initially, and the ring can be mounted on the end of one of the sections, by arrangement of the end of this section in the rebate of an end face of the ring .The end of the other piping is then moved so that it fits in the rebate of the other end face of the ring. The ring is thus held in place and allows an operator to freely carry out the welding operation.

Dans une variante, la bague peut avoir une section en losange, destinée à se loger dans un canal complémentaire formé par chanfreinage des extrémités des tronçons de tuyauterie. Dans un tel arrangement, la bague se loge initialement dans le canal et les extrémités adjacentes des tuyauteries sont séparées par un petit espace. La partie triangulaire supérieure de la bague en forme de losange entoure les extrémités, le sommet du triangle se trouvant pratiquement dans le plan transversal de symétrie. Comme indiqué précédemment, il suffit qu'un opérateur fasse fondre la bague pour qu'une soudure soit réalisée dans toute l'épaisseur des parois des tuyauteries. In a variant, the ring can have a diamond-shaped section, intended to be housed in a complementary channel formed by chamfering the ends of the pipe sections. In such an arrangement, the ring is initially housed in the channel and the adjacent ends of the pipes are separated by a small space. The upper triangular part of the diamond-shaped ring surrounds the ends, the apex of the triangle lying practically in the transverse plane of symmetry. As indicated above, it suffices for an operator to melt the ring for a weld to be made throughout the thickness of the walls of the pipes.

Le matériau de la bague de soudure est choisi afin qu'il soit compatible au matériau des tuyauteries et que son soudage à ce matériau soit facile, le matériau des tuyauteries pouvant être l'acier inoxydable. The material of the weld ring is chosen so that it is compatible with the material of the pipes and that its welding to this material is easy, the material of the pipes can be stainless steel.

La bague 1 peut être fondue en un seul passage afin qu'elle constitue toute la matière de charge-permettant la formation d'un raccord donnant à la fois une pénétration acceptable du pied et un renforcement de la soudure. The ring 1 can be melted in a single pass so that it constitutes all the filler material-allowing the formation of a fitting giving both acceptable penetration of the foot and a reinforcement of the weld.

L'utilisation de bagues préformées de soudure pour le soudage bout à bout présente un certain nombre d'avantages par rapport aux techniques existantes. En résumé, ces avantages sont les suivants
1. La préparation des tuyauteries et le montage sont faciles.The use of preformed weld rings for butt welding has a number of advantages over existing techniques. In summary, these benefits are as follows
1. Piping preparation and assembly are easy.

2. La soudabilité, d'un raccord au suivant, ne varie pas. 2. The weldability, from one fitting to the next, does not vary.

3. Des têtes de soudage de type orbital simplifié peuvent être utilisées (il n'est pas nécessaire d'utiliser de têtes à avance de fil ou à réglage automatique de la tension de l'arc). 3. Simplified orbital type welding heads can be used (it is not necessary to use heads with wire feed or automatic arc tension adjustment).

4. Le soudage manuel convient. 4. Manual welding is suitable.

5. Les systèmes à purge négative appliqués aux tuyauteriesde grand diamètre ne sont pas nécessaires. 5. Negative purge systems applied to large diameter piping are not required.

6. L'interprétation radiographique est simplifiée étant donné l'uniformité de la soudure.  6. Radiographic interpretation is simplified given the uniformity of the weld.

Claims (5)

REVENDICATIONS 1. Procédé de soudage bout à bout de tronçons de tuyauterie (4,5), caractérisé en ce qu'il comprend la réa lisation d'une bague (i) d'un matériau de soudure ayant des faces profilées d'extrémités (2, 3) dans une partie radialement interne de la bague, la formation,sur les tronçons de tuyauterie, de faces complémentaires des faces profilées d'extrémités de la bague, l'introduction de la bague entre les tronçons de tuyauterie, le rapprochement des extrémités des tronçons de tuyauterie afin que la bague soit maintenue entre elles, avec une partie radialement externe de la bague qui entoure les extrémités des tronçons de tuyauterie, et la fusion de la bague afin que les extrémités des tuyauteries soient soudées bout à bout. 1. A method of butt welding of pipe sections (4,5), characterized in that it comprises the production of a ring (i) of a welding material having profiled end faces (2 , 3) in a radially internal part of the ring, the formation, on the pipe sections, of complementary faces of the profiled end faces of the ring, the introduction of the ring between the pipe sections, the bringing together of the ends pipe sections so that the ring is held together, with a radially outer part of the ring which surrounds the ends of the pipe sections, and the fusion of the ring so that the ends of the pipes are welded end to end. 2. Procédé selon la revendication 1, caractérisé en ce que la bague (i) est formée avec un diamètre interne sensiblement égal au diamètre interne des tronçons de tuyauterie, et avec une feuillure (2, 3) dans chaque face d'extrémité de la bague, à sa périphérie interne, les feuillures formant des sièges pour le logement des extrémités des tron çons de tuyauterie. 2. Method according to claim 1, characterized in that the ring (i) is formed with an internal diameter substantially equal to the internal diameter of the pipe sections, and with a rebate (2, 3) in each end face of the ring, at its internal periphery, the rebates forming seats for housing the ends of the pipe sections. 3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que la partie radialement externe (6) de la bague, entourant les extrémités de tronçons de tuyauterie, a une section triangulaire. 3. Method according to one of claims 1 and 2, characterized in that the radially outer part (6) of the ring, surrounding the ends of pipe sections, has a triangular section. 4. Procédé selon la revendication 3, caractérisé en ce que la bague (1) est pratiquement symétrique par rapport à un plan passant par le sommet de la section triangulaire et perpendiculaire à l'axe de la bague. 4. Method according to claim 3, characterized in that the ring (1) is practically symmetrical with respect to a plane passing through the top of the triangular section and perpendicular to the axis of the ring. 5. Soudures bout à bout, caractérisées en ce qu'elles sont formées par mise en oeuvre d'un procédé selon l'une quelconque des revendications précédentes.  5. Butt welds, characterized in that they are formed by implementing a method according to any one of the preceding claims.
FR8506962A 1984-05-09 1985-05-07 Improved welding process for butt welding pipework Withdrawn FR2564018A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB848411823A GB8411823D0 (en) 1984-05-09 1984-05-09 Butt welding pipe ends

Publications (1)

Publication Number Publication Date
FR2564018A1 true FR2564018A1 (en) 1985-11-15

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ID=10560668

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8506962A Withdrawn FR2564018A1 (en) 1984-05-09 1985-05-07 Improved welding process for butt welding pipework

Country Status (6)

Country Link
JP (1) JPS60244473A (en)
BE (1) BE902375A (en)
DE (1) DE3516571A1 (en)
FR (1) FR2564018A1 (en)
GB (1) GB8411823D0 (en)
IT (1) IT1184948B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004054346A1 (en) * 2004-11-09 2006-05-11 Eads Deutschland Gmbh Method for welding joining partners by means of extruded molded part made of welding filler, as well as such a molded part for use in welding
DE102008036864A1 (en) 2008-08-07 2010-02-18 Lfk-Lenkflugkörpersysteme Gmbh Extruded molded part and method for producing such a molded part
DE102008036863B4 (en) 2008-08-07 2010-09-16 Lfk-Lenkflugkörpersysteme Gmbh Fillet weld on an overlap and / or parallel joint and a method for producing such fillet weld
CA2687926A1 (en) * 2009-11-25 2011-05-25 Lucas Milhaupt, Inc. Brazing material
AT515919B1 (en) * 2014-09-05 2016-01-15 Stiwa Holding Gmbh Welding additive and method for producing an assembly by means of a material connection

Also Published As

Publication number Publication date
IT8567423A0 (en) 1985-05-09
GB8411823D0 (en) 1984-06-13
IT8567423A1 (en) 1986-11-09
JPS60244473A (en) 1985-12-04
DE3516571A1 (en) 1985-11-14
BE902375A (en) 1985-09-02
IT1184948B (en) 1987-10-28

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