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WO2014057311A1 - A method and device for butt welding tubes - Google Patents

A method and device for butt welding tubes Download PDF

Info

Publication number
WO2014057311A1
WO2014057311A1 PCT/IB2012/055510 IB2012055510W WO2014057311A1 WO 2014057311 A1 WO2014057311 A1 WO 2014057311A1 IB 2012055510 W IB2012055510 W IB 2012055510W WO 2014057311 A1 WO2014057311 A1 WO 2014057311A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubes
filler ring
welding
joint
filler
Prior art date
Application number
PCT/IB2012/055510
Other languages
French (fr)
Inventor
Angel Naydenov KRUSTEV
Original Assignee
Gea Aircooled Systems Proprietary Limited
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 Gea Aircooled Systems Proprietary Limited filed Critical Gea Aircooled Systems Proprietary Limited
Priority to PCT/IB2012/055510 priority Critical patent/WO2014057311A1/en
Publication of WO2014057311A1 publication Critical patent/WO2014057311A1/en

Links

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
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • 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
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
    • B23K9/0286—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
    • 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
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • 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-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
    • F16L13/02—Welded joints
    • F16L13/0218—Welded joints having an inner or outer ring
    • F16L13/0236—Welded joints having an inner or outer ring having an outer ring
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes

Definitions

  • This invention relates to a method for butt welding tubes using a tungsten inert gas ("TIG”) arc welding process.
  • the invention also relates to a welding device for use in butt welding tubes using a TIG arc welding process.
  • a method of butt welding tubes using a TIG arc welding process including: providing a filler ring of weld filler material; positioning the ends of the tubes to be welded in abutment with one another so as to form a joint between the tubes; locating the filler ring over the joint so as to overlay an external side of the joint; and using a TIG welding apparatus, welding the filler ring to the tubes thereby to fuse the filler ring and the tubes simultaneously in a cover pass of the welding apparatus.
  • the method may include fusing the tubes together autogenously without the use of filler material thereby to form a welded joint, prior to locating the filler ring over the welded joint.
  • the method may include locating the filler ring over the welded joint so as to overlay an external side of the welded joint and welding the filler ring to weld the tubes in a cover pass using a TIG welding apparatus, so as to cap the welded joint.
  • the method may include spot welding the filler ring to one or both of the tubes so as to hold it in position relative to the tubes prior to fusing the filler ring to the tubes.
  • a welding device for use with a TIG welding apparatus for butt welding two tubes which are positioned end to end so as to form a joint between the tubes, the welding device comprising a filler ring of weld filler material which is configured so as to permit it to be located over the joint in a snug fit so as to overlay an external side of the joint thereby to permit the filler ring and the tubes to be fused simultaneously in a cover pass of the TIG welding apparatus.
  • the filler ring may be split and of a resilient deformable material.
  • the filler ring may have an internal diameter which is slightly smaller than the external diameter of the tubes thereby permitting the filler ring to grip the tubes when the filler ring is located over the joint between the tubes.
  • Figure 1 A shows a plan view of a welding device for butt welding two tubes, in accordance with the invention
  • Figure 1 B shows an end view of the welding device of Figure 1 A
  • Figure 2 shows a perspective view illustrating the manner in which the welding device of Figure 1 is located around a joint between two pipes to be welded;
  • Figure 3 shows an end of one of the pipes of Figure 2 and the welding device, illustrating the manner in which the welding device is used for welding two pipes;
  • Figure 4A shows a sectional side view of two pipes to be welded to one another and the welding device of Figure 1 positioned over the joint between the two pipes, illustrating a one pass TIG welding operation;
  • Figure 4B shows the welded joint between the two pipes shown in Figure 4A;
  • Figure 5A shows a sectional side view of two pipes to be welded in a two pass TIG welding operation and the welding device of Figure 1 located over the welded joint;
  • Figure 5B shows the welded joint between the two pipes shown in Figure 5A.
  • a welding device in the form of a filler ring of a weld filler material for use in butt welding two tubes in a TIG welding operation is designated generally by the reference numeral 10.
  • the filler ring 10 is specifically adapted for use in butt welding relatively thin-walled, small diameter tubes which typically have an outer diameter of between 25mm and 50mm.
  • the filler ring is typically preformed from a round TIG filler rod which typically has a 1 .6mm diameter.
  • the filler ring is split and is of a resilient deformable material which have a chemical composition which is selected so as to render it suitable for use with the material of the tubes to be welded.
  • the Applicant envisages that the chemical composition of the filler ring 10 will be chosen so as to match the chemical composition of most commercially available filler rods thus allowing welding of the majority of commercially available grades of carbon, low alloy, stainless steel or nickel-based tubing. Furthermore, the Applicant envisages that butt welding using the filler ring 10, will be performed in an inert gas atmosphere using a TIG welding apparatus including an automatic orbital welding head and a tungsten electrode which rotates around the tubes during a welding operation.
  • ends of the tubes 12.1 and 12.2 are positioned in abutment with one another so as to form a joint 14 between the tubes.
  • the filler ring is thereafter located over the joint 14 so as to overlay an external side of the joint and tacked in position over the joint.
  • the joint to be welded and the filler ring 10 are placed in an inert gas atmosphere of an enclosed automatic orbital welding head and a tungsten electrode 16 of the welding head is positioned adjacent the filler ring.
  • the filler ring is welded to the tubes 12.1 and 12.2 thereby to fuse the filler ring and the tubes simultaneously in a cover pass of the welding apparatus so as to form a welded joint 18.
  • two tubes 14.1 and 14.2 to be welded are butt welded in accordance with a method of the invention in a two-pass TIG arc welding process.
  • inner ends of the tubes 14.1 and 14.2 are positioned in abutment with one another and the ends of the tubes are fused together autogenously without the use of filler material thereby to form a welded joint 20.
  • the filler ring 10 is located over the welded joint 20 so as to overlay an external side of the welded joint and tacked in position over the fused joint.
  • the assembly is then positioned inside an enclosed automatic orbital welding head and the filler ring is welded to the tubes in a cover pass using the TIG arc welding apparatus so as to cap the welded joint 20, the capping weld run being designated generally by the reference numeral 22. This eliminates any possible defects of the root pass such as concavity or underfill.
  • the filler ring 10 will have an internal diameter which is slightly smaller than the external diameter of the tubes to be welded thereby permitting the filler ring to grip the tubes when it is located over a joint between the tubes to be welded.
  • the filler ring 10 may also be spot welded to the tubes to locate the filler ring relative to the tubes.
  • the filler ring 10 can be made to suit any desired tube diameters.
  • the filler ring also allows for tube welding with filler addition in commercially available enclosed automatic orbital welding heads that do not have the capability for filler addition.
  • the filler ring thus allows for welding with the addition of the filler in an automatic orbital welding head, thereby obviating the need for manual welding which is more difficult and requires a higher degree of skill on the part of the welder.

Landscapes

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

Abstract

A method of butt welding tubes (12.1, 12.2) using a TIG arc welding process, includes the use of a filler ring (10) of a weld filler material. The filler ring is split and of a resilient deformable material. The butt welding is performed in an inert gas atmosphere using a TIG welding apparatus (16). In a one-pass welding operation, the ends of the tubes (12.1, 12.2) are positioned in abutment with one another so as to form a joint (14). The filler ring (10) is thereafter located over the joint so as to overlay an external side of the joint and tacked in position over the joint. Using a TIG welding apparatus (16), the filler ring (10) is welded to the tubes (12.1, 12.2) thereby fusing the filler ring (10() and the tubes (12.1, 12.2) simultaneously in a cover pass of the welding apparatus.

Description

A METHOD AND DEVICE FOR BUTT WELDING TUBES
FIELD OF INVENTION
This invention relates to a method for butt welding tubes using a tungsten inert gas ("TIG") arc welding process. The invention also relates to a welding device for use in butt welding tubes using a TIG arc welding process. SUMMARY OF INVENTION
According to a first aspect of the invention there is provided a method of butt welding tubes using a TIG arc welding process, the method including: providing a filler ring of weld filler material; positioning the ends of the tubes to be welded in abutment with one another so as to form a joint between the tubes; locating the filler ring over the joint so as to overlay an external side of the joint; and using a TIG welding apparatus, welding the filler ring to the tubes thereby to fuse the filler ring and the tubes simultaneously in a cover pass of the welding apparatus.
The method may include fusing the tubes together autogenously without the use of filler material thereby to form a welded joint, prior to locating the filler ring over the welded joint. As such, the method may include locating the filler ring over the welded joint so as to overlay an external side of the welded joint and welding the filler ring to weld the tubes in a cover pass using a TIG welding apparatus, so as to cap the welded joint. The method may include spot welding the filler ring to one or both of the tubes so as to hold it in position relative to the tubes prior to fusing the filler ring to the tubes.
According to a second aspect of the invention there is provided a welding device for use with a TIG welding apparatus for butt welding two tubes which are positioned end to end so as to form a joint between the tubes, the welding device comprising a filler ring of weld filler material which is configured so as to permit it to be located over the joint in a snug fit so as to overlay an external side of the joint thereby to permit the filler ring and the tubes to be fused simultaneously in a cover pass of the TIG welding apparatus. The filler ring may be split and of a resilient deformable material. The filler ring may have an internal diameter which is slightly smaller than the external diameter of the tubes thereby permitting the filler ring to grip the tubes when the filler ring is located over the joint between the tubes. BRIEF DESCRIPTION OF THE DRAWINGS
Further features of the invention are described hereinafter by a way of a non-limiting examples of the invention, with reference to and as illustrated in the accompanying diagrammatic drawings. In the drawings: Figure 1 A shows a plan view of a welding device for butt welding two tubes, in accordance with the invention;
Figure 1 B shows an end view of the welding device of Figure 1 A;
Figure 2 shows a perspective view illustrating the manner in which the welding device of Figure 1 is located around a joint between two pipes to be welded;
Figure 3 shows an end of one of the pipes of Figure 2 and the welding device, illustrating the manner in which the welding device is used for welding two pipes;
Figure 4A shows a sectional side view of two pipes to be welded to one another and the welding device of Figure 1 positioned over the joint between the two pipes, illustrating a one pass TIG welding operation;
Figure 4B shows the welded joint between the two pipes shown in Figure 4A;
Figure 5A shows a sectional side view of two pipes to be welded in a two pass TIG welding operation and the welding device of Figure 1 located over the welded joint; and
Figure 5B shows the welded joint between the two pipes shown in Figure 5A.
DETAILED DESCRIPTION OF THE DRAWINGS
With reference to the drawings, a welding device in the form of a filler ring of a weld filler material for use in butt welding two tubes in a TIG welding operation, is designated generally by the reference numeral 10. The filler ring 10 is specifically adapted for use in butt welding relatively thin-walled, small diameter tubes which typically have an outer diameter of between 25mm and 50mm. The filler ring is typically preformed from a round TIG filler rod which typically has a 1 .6mm diameter. The filler ring is split and is of a resilient deformable material which have a chemical composition which is selected so as to render it suitable for use with the material of the tubes to be welded. The Applicant envisages that the chemical composition of the filler ring 10 will be chosen so as to match the chemical composition of most commercially available filler rods thus allowing welding of the majority of commercially available grades of carbon, low alloy, stainless steel or nickel-based tubing. Furthermore, the Applicant envisages that butt welding using the filler ring 10, will be performed in an inert gas atmosphere using a TIG welding apparatus including an automatic orbital welding head and a tungsten electrode which rotates around the tubes during a welding operation.
With reference to Figures 4A and 4B, in a method of butt welding two tubes 12.1 and 12.2 in a one-pass TIG arc welding operation, ends of the tubes 12.1 and 12.2 are positioned in abutment with one another so as to form a joint 14 between the tubes. The filler ring is thereafter located over the joint 14 so as to overlay an external side of the joint and tacked in position over the joint. The joint to be welded and the filler ring 10 are placed in an inert gas atmosphere of an enclosed automatic orbital welding head and a tungsten electrode 16 of the welding head is positioned adjacent the filler ring. Using the TIG welding apparatus, the filler ring is welded to the tubes 12.1 and 12.2 thereby to fuse the filler ring and the tubes simultaneously in a cover pass of the welding apparatus so as to form a welded joint 18.
With reference to Figures to 5A and 5B, in another embodiment of the invention, two tubes 14.1 and 14.2 to be welded are butt welded in accordance with a method of the invention in a two-pass TIG arc welding process. As with the one-pass TIG arc welding process described hereinabove, inner ends of the tubes 14.1 and 14.2 are positioned in abutment with one another and the ends of the tubes are fused together autogenously without the use of filler material thereby to form a welded joint 20. Thereafter, the filler ring 10 is located over the welded joint 20 so as to overlay an external side of the welded joint and tacked in position over the fused joint. The assembly is then positioned inside an enclosed automatic orbital welding head and the filler ring is welded to the tubes in a cover pass using the TIG arc welding apparatus so as to cap the welded joint 20, the capping weld run being designated generally by the reference numeral 22. This eliminates any possible defects of the root pass such as concavity or underfill.
The Applicant envisages that the filler ring 10 will have an internal diameter which is slightly smaller than the external diameter of the tubes to be welded thereby permitting the filler ring to grip the tubes when it is located over a joint between the tubes to be welded. The filler ring 10 may also be spot welded to the tubes to locate the filler ring relative to the tubes.
The filler ring 10 can be made to suit any desired tube diameters. The filler ring also allows for tube welding with filler addition in commercially available enclosed automatic orbital welding heads that do not have the capability for filler addition. The filler ring thus allows for welding with the addition of the filler in an automatic orbital welding head, thereby obviating the need for manual welding which is more difficult and requires a higher degree of skill on the part of the welder.

Claims

A method of butt welding tubes using a TIG arc welding process, the method including: providing a filler ring of weld filler material; positioning the ends of the tubes to be welded in abutment with one another so as to form a joint between the tubes; locating the filler ring over the joint so as to overlay an external side of the joint; and using a TIG welding apparatus, welding the filler ring to the tubes thereby to fuse the filler ring and the tubes simultaneously in a cover pass of the welding apparatus.
The method as claimed in claim 1 , which includes fusing the tubes together autogenously without the use of filler material thereby to form a welded joint, prior to locating the filler ring over the welded joint.
The method as claimed in claim 2, which includes locating the filler ring over the welded joint so as to overlay an external side of the welded joint and welding the filler ring to weld the tubes in a cover pass using a TIG welding apparatus, so as to cap the welded joint.
The method as claimed in any one of claims 1 to 3, which include spot welding the filler ring to one or both of the tubes so as to hold it in position relative to the tubes prior to fusing the filler ring to the tubes.
5. A welding device for use with a TIG welding apparatus for butt welding two tubes which are positioned end to end so as to form a joint between the tubes, the welding device comprising a filler ring of weld filler material which is configured so as to permit it to be located over the joint in a snug fit so as to overlay an external side of the joint thereby to permit the filler ring and the tubes to be fused simultaneously in a cover pass of the TIG welding apparatus.
6. The welding device as claimed in claim 5, wherein the filler ring is split and of a resilient deformable material.
7. The welding device as claimed in claim 6, wherein the filler has an internal diameter which is slightly smaller than the external diameter of the tubes thereby permitting the filler ring to grip the tubes when the filler ring is located over the joint between the tubes.
8. The method as claimed in claim 1 , substantially as described in the specification with reference to and as illustrated in any of the drawings.
9. The welding device as claimed in claim 5, substantially as described in the specification with reference to and as illustrated in any of the drawings.
PCT/IB2012/055510 2012-10-11 2012-10-11 A method and device for butt welding tubes WO2014057311A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2012/055510 WO2014057311A1 (en) 2012-10-11 2012-10-11 A method and device for butt welding tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2012/055510 WO2014057311A1 (en) 2012-10-11 2012-10-11 A method and device for butt welding tubes

Publications (1)

Publication Number Publication Date
WO2014057311A1 true WO2014057311A1 (en) 2014-04-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104075047A (en) * 2014-06-19 2014-10-01 中国海洋石油总公司 Tungsten alloy plated pipeline welding port connecting method
CN104913128A (en) * 2015-05-26 2015-09-16 中国五冶集团有限公司 Turbine lubrication oil pipeline connecting method
CN105033414A (en) * 2015-07-09 2015-11-11 安徽金阳金属结构工程有限公司 Pipeline welding process
CN109202225A (en) * 2018-09-27 2019-01-15 天津大学 Fine caliber pipeline double sides double arc welding system and method based on K-TIG
CN110293282A (en) * 2019-07-09 2019-10-01 中国航发哈尔滨东安发动机有限公司 A kind of automatic argon arc girth welding method of pipeline

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731933A (en) * 1956-01-24 Welding ring
EP0095976A1 (en) * 1982-05-26 1983-12-07 Framatome Welding process for two elements
EP0204145A1 (en) * 1985-05-10 1986-12-10 Siemens Aktiengesellschaft Insert for coupling pipes by welding
EP0525469A2 (en) * 1991-07-11 1993-02-03 STEIN INDUSTRIE Société Anonyme dite: Procedure of but-welding two pipe ends and device for the execution of the procedure
EP1506834A1 (en) * 2003-08-09 2005-02-16 VEGA Grieshaber KG Method, welding device and welding filler for welding a seam between two workpieces, in particular for manufacturing a level measuring device
US20100181759A1 (en) * 2009-01-20 2010-07-22 Quinn Denny L Apparatus and method for welding steel boiler tubes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731933A (en) * 1956-01-24 Welding ring
EP0095976A1 (en) * 1982-05-26 1983-12-07 Framatome Welding process for two elements
EP0204145A1 (en) * 1985-05-10 1986-12-10 Siemens Aktiengesellschaft Insert for coupling pipes by welding
EP0525469A2 (en) * 1991-07-11 1993-02-03 STEIN INDUSTRIE Société Anonyme dite: Procedure of but-welding two pipe ends and device for the execution of the procedure
EP1506834A1 (en) * 2003-08-09 2005-02-16 VEGA Grieshaber KG Method, welding device and welding filler for welding a seam between two workpieces, in particular for manufacturing a level measuring device
US20100181759A1 (en) * 2009-01-20 2010-07-22 Quinn Denny L Apparatus and method for welding steel boiler tubes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104075047A (en) * 2014-06-19 2014-10-01 中国海洋石油总公司 Tungsten alloy plated pipeline welding port connecting method
CN104913128A (en) * 2015-05-26 2015-09-16 中国五冶集团有限公司 Turbine lubrication oil pipeline connecting method
CN105033414A (en) * 2015-07-09 2015-11-11 安徽金阳金属结构工程有限公司 Pipeline welding process
CN109202225A (en) * 2018-09-27 2019-01-15 天津大学 Fine caliber pipeline double sides double arc welding system and method based on K-TIG
CN110293282A (en) * 2019-07-09 2019-10-01 中国航发哈尔滨东安发动机有限公司 A kind of automatic argon arc girth welding method of pipeline

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