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7735709 |
Apparatus and method for joining pipe ends together
A method and apparatus for joining pipe sections (102, 104) together to form an underwater pipeline. The pipe sections (102, 104) are in an abutting position and have a generally vertical...
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7465900 |
Electrical energy discharge control
Systems and methods presented herein provide for the control of electrical energy discharge from an electrode. In this regard, a sensor detects electrical energy discharged from the electrode and...
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7386927 |
Apparatus to roll, cut, weld, and form tank car outer jackets
A system and method of fabricating tank car outer jackets are provided that include supporting a plurality of coils of sheet metal on a plurality of coil supports such that the central longitudinal...
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7057137 |
Orbital welding internal pressure control
The present invention is generally comprised of a tube adaptor, a chamber, a chamber pressure sensor, a calibration pressure sensor, an iris valve, an iris valve drive means, and a control and data...
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7032809 |
Seam-welded metal pipe and method of making the same without seam anneal
An apparatus and method for making a seam-welded steel pipe free of untempered martensite without seam anneal. The method includes selecting a steel containing a carbon concentration below a...
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7028882 |
Process and apparatus for boiler tube panel welding and straightening
An apparatus and process for depositing an overlay weld on a boiler tube panel comprising a plurality of tubes with adjacent tubes joined together with membranes therebetween, and then...
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6953909 |
External pipe welding apparatus
The invention relates to the field of automated welding, and more particularly, to an automated, gas metal arc welding apparatus for externally welding abutting sections of pipe. The apparatus has...
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6919528 |
Welding machine and welding method for energy welding of cylinder members
In a welding machine and welding method, for welding cylinder members together about an outside diameter, which prevents the cylinder members from being deformed and corrects the deformation of a...
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6417488 |
Internal metal pipe welding apparatus and monitoring system
A metal pipe inner surface weld-mounting apparatus having a monitoring device is constituted by an arm, a horizontal torch, a mirror, a camera and a monitoring device. The arm has a supported base...
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6414265 |
Method and apparatus for drawn arc welding with magnetically impelled arc
A method and apparatus for drawn arc welding includes the step of applying a magnetic field transversely to the arc to impel the arc along the welding gap. The invention permits tubular components...
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6188037 |
Welded high-strength steel structures and method of manufacturing the same
The present invention is a welded high-strength steel structure having a TS of not less than 900 MPa and excellent low-temperature toughness and a method of manufacturing the steel structure. The...
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6066823 |
Semiautomatic tube welding apparatus
The present invention relates generally to an apparatus and method for performing tube-to-tubesheet welding within box headers and, in more particular, to a GTAW welding gun that has a long...
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6060678 |
Gas shield strip clad welding system
A gas shield strip cladding welding system including a workpiece, a strip of welding material, an enclosure having an opening through which the strip of welding material passes, a feeder for...
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6060688 |
Device for internally butt-welding pipes
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5981906 |
Method of welding the ends of pipe together using dual welding wires
A new system for welding sections of pipe together to form a long, continuous pipeline. A welding bug is mounted on a guide track which goes around the circumference of the pipe. The welding bug is...
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5910258 |
Weld head assembly
A weld head assembly which, in one embodiment, includes a mounting ring subassembly and a faceplate subassembly is described. The mounting ring subassembly includes a mounting ring configured to be...
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5648001 |
Welding method and clamping device for steel reinforcements
A welding method for steel reinforcements, wherein electric current flows through the reinforcements, an electroslag pool formed from a solder melted by an electric arc generates a lot of heat to...
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5534676 |
System for automatically controlling weld material beading in orbital welding processes for medium- and large-size pipes
The system comprises: a distance sensing device for sequentially acquiring, during the welding process or before it, individual transverse profiles of the welding gap by gauging its various depths;...
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5524813 |
Seam welding apparatus and method
A welding apparatus and method is provided for automatically welding a stack of two or more metal tubes together. The tubes are stacked such that there is a pair of opposed longitudinal interfaces...
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5435478 |
Welding apparatus and method
A method and apparatus for use in welding pipe. The apparatus includes means for viewing the interior of the pipe, means for establishing a predetermined atmosphere in the weld zone and means for...
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5347101 |
Automatic tracking system for pipeline welding
A system for automatically tracking a surface for performing a welding operation comprises a frame and pair of ring gears movably mounted to the frame. The ring gears are spaced apart from each...
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5310982 |
T-joint welding fixture
A method and apparatus for welding a branch tube to a header tube includes a fixture having a pair of clamps for supporting the fixture on the header tube. A welding head on the fixture includes a...
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5304776 |
System for welding pipes
An automatic welding system uses an anti-gravitational welding controller to minimize or eliminate the undercutting and concavity of the roots of the welds caused by gravitational effects. The...
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5235152 |
Device for flooding a weld seam between two pipes to be welded with gas
A device for flooding a weld junction between two devices with a protective gas has a double wall body received in the pipes and bridging the junction with sealing rings received in end chambers of...
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5227601 |
Adjustable welding torch mounting
Automatic welding apparatus of the type comprising a carriage self-propelled along a guide track encircling end-to-end adjoining metal tube sections through a welding pass therearound for forming a...
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5217156 |
Device for hindgas coverage in tube welding
A device for hindgas coverage in welding tube pieces (2,3) together comprises two sealing devices (5,6) connected by a rod (7). The sealing devices comprise a first web part (10) with sealing means...
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5212363 |
Torch for removing steam generator tubes
A torch assembly for TIG relaxing an inner surface of a tube to be removed from a tube sheet which comprises a conductive base containing passages for cooling water and for inert gas. A sheath is...
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5191185 |
Girth and seal welding apparatus
A welding apparatus is disclosed for seal welding closed the bore of a sealing plug which is positioned adjacent the end of a hollow tube and where the bore defines an axis in communication with...
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5187343 |
Purge block for pipe welding
A purge block with non-inflatable, disc-like seals removably mounted on either end of an elongate tube. In one embodiment, the tube is rigid and hollow and forms part of a conduit for argon or...
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5148000 |
Distributed processing control system for automatic welding operation
An automatic welder is used in an internal welder unit which travels along the interior of a pipeline and provides the interior weld passes at the junction of abutting pipe joints. The internal...
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5140123 |
Continuous manufacturing method for a metal welded tube and a manufacturing apparatus therefor
A continuous manufacturing method for a metal welded tube and a manufacturing apparatus therefor, which obtains a tubular member by continuously passing a metal band coil through molding rollers,...
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5126523 |
Device for welding pipes to each other
In a device for welding together pipe ends of pipes held mutually in line, a fixing band is first clamped around a pipe and a ring frame for opening and closing is then arranged therearound which...
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5075527 |
Apparatus and method for welding joint fixtures to a pipe
An apparatus and a method for welding joint fixtures to either end of a pipe at a given angles of attachment. A retaining mechanism on both the driver side and the follower side for joint fixtures...
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5019189 |
Steel pipe and a method for welding thereof and pipeline resistant to carbon dioxide corrosion
A pipeline and steel pipe having superior resistance to carbon dioxide corrosion and suitable for transporting crude oil, natural gas and the like containing carbon dioxide. The pipeline includes...
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5001320 |
Welding fixtures by which pipe ends are joined together
A pipe welding connector for joining pipe sections that have been internally coated with a heat sensitive coating material. The connector is arranged so that during the welding process, the coating...
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4971750 |
End stop for welding sealing plugs of nuclear fuel rods
An end stop is adapted for engaging the sealing plug positioned in the end of a nuclear fuel rod and so as to permit the evacuation of the fuel rod to facilitate girth welding of the plug onto the...
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4937427 |
Apparatus and method for automatically welding a T-junction connector to a main pipe
An apparatus and a method for automatically welding a T-junction connector to a main pipe are disclosed. The apparatus includes a rotatable frame which is provided with a movable bracket for...
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4931612 |
Device for forming a closed chamber inside two metal pipes to be connected together by arc welding under a protective gas
A device for forming a closed chamber inside a set of two metal pieces of pipework (1) to be interconnected by arc welding under a protective gas, the device comprising a first hollow element made...
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4912293 |
method and apparatus for forming a partial protective-gas atmosphere
In a vessel, two tubes are mutually spaced apart by a given distance, are to be welded together at ends of the tubes, are accessible with difficulty or not at all, and one of them is introduced...
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4908491 |
Integrated modular tool system for end preparation and end-to-end welding of pipes
An apparatus method for pipe end preparation and end to end welding of pipes comprises a stationary annular clamp (4) for both clamping and round up of pipes (2). It also has one or two rotating...
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4857691 |
Burnable absorber rod end plug welding apparatus and method
A welding apparatus includes a housing defining a welding chamber and an access opening at one end thereof. The access opening allows an end of a tube fitted with an end plug to pass into and from...
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4811888 |
Method and apparatus for manufacturing small diameter, thick walled, cable sheaths
There is disclosed a method and apparatus for manufacturing a small diameter, thick walled, cable sheath by controllably driving a metal strip in a longitudinal direction while it is trimmed and...
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4742204 |
Lead welding process, apparatus and product
Flashing for a pipe is produced by joining a lead sheet having a hole in it for passing over the pipe, and a lead cylinder which is to surround the pipe and be bent into the top thereof. The joint...
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4716271 |
Apparatus for positioning a tool with respect to a cylindrical work piece
An apparatus for circumferentially and longitudinally positioning a weld head or other tool with respect to the surface of a pipe. A first annular ring is affixed to the pipe. A longitudinally...
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4698474 |
Welding tongs for connecting two abutting pipe ends by arc welding
Welding tongs for connecting two abutting pipe ends to each other by arc welding, includes two rigid jaws, a clamping device in the form of two symmetrical clamping jaws guided in the rigid jaws in...
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4659903 |
Process and machines for automatically welding or cutting the junction point between a main pipe and a secondary branch pipe
The invention relates to a machine for automatically welding and/or cutting the junction point between a main pipe and a secondary branch pipe placed thereon. This machine comprises a positioning...
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4649250 |
Pipe welder
A pipe welder for the automatic welding of joints between end abutting stationary sections of pipe which uses a welding head assembly mounted on a track which is mounted about the pipe. The welding...
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4626644 |
Method and apparatus for automatically producing thin-walled tubes
A method for restarting the longitudinal welding seam when producing thin-walled tubes from a metal tape comprises the steps of starting welding with the tape in motion and the welding current...
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4618757 |
Method and apparatus for manufacturing large, metal cylindrical structures
Method for manufacturing a large-sized, cylindrical, metal casing by welding successive cylindrical sections, characterized in that metal in the form of a strip is unwound continuously and at a...
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4611830 |
Partially consumable spacer chill rings and their use in welding pipe joints
A partially consumable spacer chill or welding ring includes a generally cylindrical non-consumable base metal ring having an outside diameter of such a size as to snugly fit the inside diameter of...
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