Abstract: A filler tube for a fuel tank, having a tube portion made of plastic material and a tubular adapter, which is connected to the tube portion, for coupling the filler tube to the fuel tank, wherein a lateral surface of the adapter is integrally bonded, in particular welded, to a lateral surface of the tube portion, wherein the adapter and the tube portion overlap in the region of the integrally bonded connection.

Abstract: A joining sleeve configured to connect internal liners of two internally lined pipe sections across a welded pipe section joint and a method of use is disclosed. The joining sleeve comprises a sleeve body having a first end and a second end, the first and second ends configured to couple with opposing ends of first and second internal liners respectively. A collar is disposed around the outer surface of the sleeve body, the collar having a first retracted condition in which it has a first outer diameter, and a second expanded condition in which it has a second outer diameter, larger than the first outer diameter.

Abstract: A method of manufacturing a driving drum includes: molding a first cylindrical member including first large- and small-diameter parts, a diameter of an outer circumferential surface of the first small-diameter part being smaller than that of the first large-diameter part; molding a second cylindrical member having second large- and small-diameter parts, a diameter of an inner circumferential surface of the second large-diameter part corresponding to the diameter of the outer circumferential surface of the first small-diameter part, a diameter of an inner circumferential surface of the second small-diameter part corresponding to that of the first small-diameter part, and the diameter of the inner circumferential surface of the second small-diameter part being smaller than that of the second large-diameter part; and forming a first cam groove between the first and second small-diameter parts and forming a second cam groove between the first and second large-diameter parts.

Abstract: Roll grooved pipe fittings useful in the assembly of a variety of mechanically joined piping systems. These pipe fittings are roll grooved so that they can be mechanically joined directly with other like pipe fittings and/or with roll grooved straight pipe thereby substantially simplifying assembly. In addition, hybrid pipe fittings and systems are also disclosed. Methods and apparatus for manufacturing these aforementioned roll grooved pipe fittings are also disclosed and address both the roll grooving process itself, as well as various methodology and apparatus for correcting deformations that can occur as a result of the roll grooving process. Methods for using the aforementioned apparatus are also disclosed.

Abstract: A weld with a stepped configuration is provided. The stepped configuration may be machined from a substrate to form a weld preparation which may accommodate a stepped weld. The weld with a stepped configuration and a controlled procedure exhibits improved service life and improved damage tolerance. A welded joint with a stepped configuration, a joined component with a stepped configuration, and method of welding a stepped configuration are also provided.

Abstract: A pipe coupling for connecting adjacent pipes. The pipe coupling has a connection type at each end that may be male or female. A female end may have an interior surface defining a receiving chamber. An interior circumferential groove is formed in the interior surface in which a band is seated. A plurality of rigid fingers is extends from the band into the receiving chamber. The receiving chamber receives a male end of an adjacent pipe, the male end having an exterior surface. An exterior circumferential groove is defined on the exterior surface to receive the plurality of rigid fingers. A variety of connection types and combinations are disclosed. The female end may define a sight window to permit viewing of the position of a male end of an adjacent pipe. The receiving chamber may have a reduced diameter proximate to the middle of the coupling to improve sealing.

Abstract: A method for joining two components, of which at least one is tubular in shape, more preferably of an exhaust system of an internal combustion engine. The joint can be produced in an easier manner with high quality if a ring-shaped joining element having an outer cone on at least one axial side with its outer cone is axially pressed into an axial end section of the one tubular component, as a result of which the end section of the one component widens along the outer cone when on its axial end of the widened end section and on the joining element a circumferential weld seam is produced and when the other component on an axial end section is joined with the joining element.

Abstract: A method for repairing a turbine housing of an air cycle machine that includes removing damaged material from a journal bearing bore of the turbine housing and forming the journal bearing bore. Next, the inner diameter of the journal bearing bore is determined and a cylindrical insert is formed. The cylindrical insert includes a first end, a second end, an inner surface, a step located at the first end, and an outer surface with an outer diameter that provides a diametric interference with the inner diameter of the journal bearing bore. The second end of the cylindrical insert is inserted into an inlet of the journal bearing bore up to the step. The cylindrical insert is secured to the turbine housing and both are stress relieved by heating. Following the stress relief, the inner surface of the cylindrical insert is formed and seal grooves are formed on the inner surface.

Abstract: A system and method is provided for joining pipes where a keyhole is formed in each of the pipe ends and then a filler metal is placed in the keyholes to join the pipes to each other. The filler metal can be deposited using a laser hot wire process.

Abstract: An emergency temporary spent fuel pool cooling system for a nuclear power generating facility that has a permanently installed primary loop within the nuclear containment and a mobile temporary secondary loop. The secondary loop is housed in transport vehicles that can be stored off site and is connectable in heat exchange relationship with the primary loop through quick disconnect couplings that are accessible on the outside of the reactor containment. The transport vehicles also include self-contained power and compressed air sources for powering and controlling the entire emergency cooling system. The system also has a make-up water injection capability for refueling the spent fuel pool and secondary loop.

Abstract: An injection joint for a socket and pipe end pipe joint, which includes a socket, a pipe end inserted into the socket with a gap therebetween, and an flange ring capping the socket. Flange rings are disclosed which include an injection port and/or a slit. Injection joints may provide a recess in the pipe OD into which the flange ring is received, the recess functioning to stop travel of the flange ring during injection and widening the gap to facilitate adhesive travel. The split in the ring facilitates mounting the ring into the recess and functions as exit port.

Abstract: A welding spacer includes a spacer body having a first pipe-engaging face and a second socket-engaging face. The spacer may be formed from any suitable material, including a liquid-degradable or heat-degradable composition. A spacer thickness separates the first face and the second face. The spacer thickness may comprise solid material or it may have one or more hollow portions. A peripheral edge is provided on the spacer body. One or more deformable members may be provided on the peripheral edge for retaining the spacer in a structure. The welding spacer may be incorporated in a pipe assembly that includes a first pipe segment and a second pipe segment. The first pipe segment has a socket at a first pipe end with an interior shoulder to seat the welding spacer. The second pipe segment has a second pipe end that is received in the socket and seated against the welding spacer.

Abstract: A plastic adapter for fuel tanks. The adapter includes crimping lugs for fixing the adapter to a pipe or an opening in the tank.

Abstract: A welding spacer includes a spacer body having a first pipe-engaging face and a second socket-engaging face. The spacer may be formed from any suitable material, including a liquid-degradable or heat-degradable composition. A spacer thickness separates the first face and the second face. The spacer thickness may comprise solid material or it may have one or more hollow portions. A peripheral edge is provided on the spacer body. One or more deformable members may be provided on the peripheral edge for retaining the spacer in a structure. The welding spacer may be incorporated in a pipe assembly that includes a first pipe segment and a second pipe segment. The first pipe segment has a socket at a first pipe end with an interior shoulder to seat the welding spacer. The second pipe segment has a second pipe end that is received in the socket and seated against the welding spacer.

Abstract: A male fitting (15) comprising a fitting body (16) of a first material elongated along a longitudinal axis and having an outer surface (23, 27) and an inner surface (20) defining a through-passage (28), the outer surface having a first portion (23) and a shoulder (18) extending radially from the first portion, the shoulder being integral to the fitting body and formed substantially of the first material, the first portion of the outer surface adapted to engage a corresponding aperture (39) in a mating member (35), and the integral shoulder adapted to be heated into provide an autogenous weld (45) between the fitting body and the mating member.

Abstract: A preassembled mechanical pipe coupling having spacers is disclosed. The coupling has a plurality of interconnectable segments that straddle the ends of pipe elements to be joined. The segments have arcuate surfaces that engage outer surfaces of the pipe elements. Spacers, positioned between the segments, maintain them in spaced apart relation sufficient to allow the pipe elements to be inserted between the segments. The segments have adjustably tightenable connection members for connecting the segments and drawing them to one another. When the connection members are tightened and the effect of the spacers is overcome, the arcuate surfaces are brought into engagement with the outer surfaces of the pipe elements.

Abstract: A tubular coupling element for producing a glued joint with a fluid line and a method for producing such a glued joint. The coupling element includes an inner tube that is insertable into a fluid line and an outer tube that is constructed concentric to the inner tube and integrally connected to the rear end of the inner tube by a connecting wall. An annular gap is present between the two tubes and is designed to receive an end section of the fluid line and a hot-melt type adhesive in a compacted solid form shaped as a ring. A connection between the coupling element and the fluid lines can be easily established by first introducing the adhesive in the annular gap and then melting it by rapidly supplying heat while the end section of the fluid line is pressed into the annular gap of the coupling element.

Abstract: A soldered feed-through device that is inserted into a bulkhead opening has one or more sets of laterally protruding and symmetrically distributed teeth that cut through the bulkhead material as the feed-through is inserted into the bulkhead opening. The teeth automatically center the feed-through device within the bulkhead opening and resist tilting of the feed-through and its through-hole conductor so that application of solder to the area between the feed-through and the inner periphery of the opening produces a solder joint having uniform radial thickness of preferably about 0.14 mm (0.0055 in.).

Abstract: The present invention provides a positive gapping device for socket welded fittings. The positive gapping device comprises a socket fitting having a recessed area on at least one end for receiving a pipe section that is engageable with the recessed area of the socket fitting. It further includes a gapping means disposed on one of a surface of the recessed area of the socket fitting facing an end of such pipe section and an end of such pipe section for engagement with such socket fitting. The gapping means providing a space between the socket fitting and such pipe section for reducing residual stresses that result from a welding operation.

Abstract: An adjustable pipe connector for joining ends of lined pipe where corrosive or erosive gases, fluids or slurries may flow to provide a continuous corrosion barrier between the ends of adjacent pipe liners. The connector provides a telescoping arrangement of sleeves that may be adjusted in length to meet the needs of the pipes being welded. The connector also provides heat shielded weld points for welding to the pipe ends to ensure that the integrity of the pipe coatings is maintained.

Abstract: The present invention provides a positive gapping device for socket welded fittings. The positive gapping device comprises a socket fitting having a recessed area on at least one end for receiving a pipe section that is engageable with the recessed area of the socket fitting. It further includes a gapping means disposed on one of a surface of the recessed area of the socket fitting facing an end of such pipe section and an end of such pipe section for engagement with such socket fitting. The gapping means providing a space between the socket fitting and such pipe section for reducing residual stresses that result from a welding operation.

Abstract: A split, ring-shaped pipe spacer used to maintain separation between a pipe and a fitting shoulder during welding. The spacer has pairs of yieldable offset segments. The two segments of each pair bulge from the spacer body in opposite directions to maintain proper spacing between the pipe and fitting during welding. The opposing offset segments also permit bi-directional insertion of the spacer into the fitting, position the spacer body out of contact with both the pipe and the fitting, and minute and distribute the stress imparted to the spacer when forming the segments during manufacturing. The spacer ends forming the split in the spacer have a tongue-in-groove shape to accommodate circumferential expansion of the spacer under compression of the pipe.

Abstract: A corrosion resistant sleeve joining abutted ends of lined pipe where corrosive or erosive gases, fluids or slurries may flow to provide a continuous corrosion barrier between the ends of adjacent pipe liners. The sleeve is preferably a cylindrical member having sufficient length to allow disposition of a protective material, such as biocide, corrosion inhibitor, or combination thereof between the sleeve and the pipe surrounding the sleeve. The elongated cylindrical section may provide a double set of O-rings separated by a distance that would allow an annular recess to be placed between them for disposing a protective material. The protective material is preferably soluble with any fluid material that is to be transported through the pipe and blends with any fluid that permeates the outer most O-ring and comes into contact with the protective material.

Abstract: A fume exhaust duct joint, a clamping collar for clamping two cylindrical dual-laminate duct sections joined by an internal slip collar, and a method for assembling the joint. A first embodiment of the clamping collar has two clamp portions each including a metal outer skin spot-welded to a metal inner skin. The inner skins have bifurcated protrusions whose bifurcations penetrate the duct section outer surfaces when the collar is tightened, and, optionally, two circumferential beads of fire retardant caulking. The inner skins and slip collar are bonded to duct section surfaces using a putty-like sealant including a settable admixture of curing agent and novolac epoxy resin. A second embodiment of the clamping collar, preferred for duct sections 3-inches in diameter or smaller, has a single circumferential clamp portion.

Abstract: A split, ring-shaped pipe spacer used to maintain separation between a pipe and a fitting shoulder during welding. The spacer has pairs of yieldable offset segments. The two segments of each pair bulge from the spacer body in opposite directions to maintain proper spacing between the pipe and fitting during welding. The opposing offset segments also permit bidirectional insertion of the spacer into the fitting, position the spacer body out of contact with both the pipe and the fitting, and minute and distribute the stress imparted to the spacer when forming the segments during manufacturing. The spacer ends forming the split in the spacer have a tongue-in-groove shape to accommodate circumferential expansion of the spacer under compression of the pipe.

Abstract: An apparatus which creates a pre-engineered solvent bond is disclosed which acts to self-optimize the characteristics of the resultant solvent bond. These characteristics can thus be chosen by the part designer with confidence that inherent variations in the assembly process will not unduly impact the resultant bond. The design establishes a specific volume through integral tabs or removable shims within which solvent acts to precisely dissolve material so that the predetermined bond characteristics are automatically created without reliance upon assembler technique.

Abstract: A connection joining abutted ends of pipe includes a sleeve therein which provides a continuous seal to protect the juncture of the pipe ends and the interior portions of the pipe adjacent the pipe ends from the materials passing through the pipe. The sleeve may be configured from a non-metallic material, such as PTFE, and a plurality of seal rings may be located on the outer circumference thereof to seal the sleeve to the interior surface of the pipe. The non-metallic sleeve is inherently non-corrosive, and therefore no secondary protective coatings need be provided on the interior surfaces of the pipe connection to protect the weld. To position the sleeve in the pipe ends, the sleeve may include a plurality of removable spacer pins thereon which are removed from the sleeve before the weld connection is completed. The sleeve may include circumferential end recesses forming a minor diameter end portion which is receivable in a tubular barrier material where the pipe includes an internal barrier material.

Abstract: An apparatus which creates a pre-engineered solvent bond is disclosed which allows the bond characteristics of the resultant solvent bond to be predetermined. These characteristics can thus be chosen by the part designer with confidence that inherent variations in the assembly process will not unduly impact the resultant bond. The design establishes a specific volume through removable shims. Solvent added to this volume acts to dissolve material so that the predetermined bond characteristics are created.

Abstract: A weld connection joining abutted ends of pipe includes a heat limiting sleeve therein which provides a continuous seal to protect the weld and the interior portions of the pipe from the materials passing through the pipe. The sleeve may be configured from a non-metallic material, such as PTFE, and a plurality of seal rings may be located on the outer circumference thereof to seal the sleeve to the interior surface of the pipe. The non-metallic sleeve is inherently non-corrosive, and therefore no secondary protective coatings need be provided on the interior surfaces of the pipe connection to protect the weld. To position the sleeve in the pipe ends, and to properly position the pipe ends for welding, the sleeve includes a plurality of removable spacer pins thereon which are removed from the sleeve before the weld connection is completed.

Abstract: The welding sleeve has a coil of a resistance wire forming two heating zones and is arranged near the inner circumference of the sleeve. Each heating zone has a region at the beginning and end in which the coil spacing is less than in the center region.

Abstract: A joint for brazing includes a male member having an external surface and a female receptacle having an internal surface. The external surface is positionable in face-to-face relationship with the internal surface when the male member is inserted within the female receptacle. A self-fixturing surface is provided on at least one of the male member and the female receptacle for centering the male member with respect to the female receptacle when the male member is inserted within the female receptacle and to provide substantially equal clearance between and around the male member and the female receptacle for proper capillary attraction of the metallic intermediate bonding material or filler alloy during brazing. The filler alloy is drawn by capillary attraction into the space between the meeting faces defined by the external surface of the male element and the internal surface of the female receptacle.

Abstract: An apparatus which creates a pre-engineered solvent bond is disclosed which acts to self-optimize the characteristics of the resultant solvent bond. These characteristics can thus be chosen by the part designer with confidence that inherent variations in the assembly process will not unduly impact the resultant bond. The design establishes a specific volume through integral tabs or removable shims within which solvent acts to precisely dissolve material so that the predetermined bond characteristics are automatically created without reliance upon assembler technique.

Abstract: Circumferentially spaced bosses concentrically position a male tube end within a female tube end. The bosses have a preferred shape which permits molten brazing material to flow evenly between the tubes, ensuring a void-free joint. The bosses provide a relief clearance at the mouth of the male tube to allow the formation of a continuous annular band of brazing material at this end. Stop tapers on the bosses allow the female tube to be pressed onto the male tube for stability prior to brazing. The bosses also limit the overlap of the two tubes to a maximum distance, ensuring adequate heat conduction to the innermost portion of the male tube. Spacers, integral with the bosses, form an axial gap between the tubes into which the brazing rod more readily melts.

Abstract: The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various other operations have a crosslinked thermoplastic resin layer and at least one joining portion which comprises a non-crosslinked thermoplastic resin layer that is formed a as an integral part of said crosslinked thermoplastic resin layer in the area where it contacts a tubular member to be joined, and a heating electric wire provided either within or on the outer or inner surface of said non-crosslinked thermoplastic resin layer. Such electrofusion joint and header are applicable to any part of a piping system for supplying hot water and they will withstand use for a prolonged period.

Abstract: The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various other operations have a crosslinked thermoplastic resin layer and at least one joining portion which comprises a non-crosslinked thermoplastic resin layer that is formed a as an integral part of the crosslinked thermoplastic resin layer in the area where it contacts a tubular member to be joined, and a heating electric wire provided either within or on the outer or inner surface of the non-crosslinked thermoplastic resin layer. Such electrofusion joint and header are applicable to any part of a piping system for supplying hot water and they will withstand use for a prolonged period.

Abstract: A coupled pipe assembly having a pair of opposed, axially-positioned pipes each having opposed beveled ends and interior corrosion-resistant linings. A sleeve having heat-deflecting material is provided axially within the pipes with the heat-deflecting material being positioned adjacent the opposed pipe ends to protect the corrosion-resistant linings from heat damage during welding of the pipe ends. The sleeve has a tapered cross-section extending to and forming a rounded end edge portion.

Abstract: A method for soldering in a furnace the end of a small diameter metallic pipe to a mating member. The soldered product is generally used as an oil or air supply means for automobiles and other various kinds of machines and devices. According to the method of this invention, a larger outer diameter portion is formed at the connecting end of a pipe and forced into the inner peripheral wall of the connecting end of a mating member leaving a small clearance therebetween. Then a soldering material arranged near the the clearance is fused by heating. The method of the invention is advantageous in that upon heating, the soldering material distributes uniformly throughout the clearance between the mating walls of the connecting members thereby securely soldering both members without the necessity of tack welding.

Abstract: In a plastic pipe joining system a plastic sleeve is provided to extend on both sides beyond the region of contact or closest approach to one another of pipes to be joined with the sleeve being fused to both pipes, the sleeve heated to Curie temperature of high mu material excited by an externally generated high frequency magnetic field. The heater may be embedded in the sleeve and the sleeve may also be employed with end caps that extended over the sleeve, the end caps and sleeve being fused to one another and the pipes by heaters carried by the end caps or the sleeve. An external heater may also be employed which in conjuction with shaped end members provides the sleeve with beveled or tapered edges to enhance the ability of the sleeve to withstand cracking.

Abstract: A method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method. The inner pipes of the pipe system are connected to each other with a sleeve member by welding or gluing. Clamping jaws are used for holding and moving the inner pipes toward each other. The outer pipes are shorter than the inner pipes at least by the thickness of the two clamping jaws. For bridging the gap between the outer pipes, an expandable intermediate ring is inserted in the gap. An electric welding sleeve is used for connecting the outer pipes and the intermediate ring.

Abstract: A coupled pipe assembly having a pair of opposed, axially positioned pipes each having opposed beveled ends and interior corrosion-resistant linings. A sleeve having heat-insulating material is inserted axially within the pipes with the heat-insulating material being positioned adjacent the opposed pipe ends to protect the corrosion-resistant linings from heat produced during the welding of the pipe ends. The sleeve has a uniform, continuous diameter along the entire length thereof.

Abstract: An electric heating element for electrically fusing thermoplastic materials. The heating element comprises an elongated thermoplastic insulated wire wound in a spiral configuration with adjacent surfaces of the thermoplastic insulation adhered together.

Abstract: A base having removable side rails for elevating a toilet for use by physically handicapped or elderly persons is disclosed. The base is formed generally in the shape of a flat rectangle having a height equal to the amount by which it is desired to elevate the toilet above a floor for use. A large aperture is formed through the base near the central portion thereof having appropriate plumbing fittings for connecting the bowl of the toilet to the drain. A first pair of smaller apertures are provided to permit the passage therethrough of appropriate threaded fasteners so as to secure the toilet to the floor. A second pair of apertures are formed through the sides of the base to permit appropriate side rails to be inserted therein for use. Each of the side rails includes an adjustable grip which can be positioned and secured in a desired manner so as to assist a person in getting on and off of the toilet seat.

Abstract: The present invention relates to a weld joint for metal pipes. The object is to provide a weld joint which is easy to make and which has a clean surface inside the pipe. The ends of the pipes to be jointed are flared and a cylindrical metal sealing ring under axial compression is arranged between the inner conical flared surfaces of the flared pipe ends. The edges of the ring are elastically bent inward by the inner conical surfaces of the pipe ends. The sealing ring is preferredly provided with a circumferential flange projecting out between the pipe ends for facilitating correct position of the sealing ring.

Abstract: A wafer-shaped spacer ring for a pipe and fitting. The ring is formed of liquid soluble material to allow the ring to dissolve after the pipe and fitting are welded and the pipe is flushed.

Abstract: A partially consumable spacer chill ring for welding a pair of adjacent pipe ends together, includes a non-consumable, substantially annular, base metal ring having an outer surface with an outside diameter permitting a snug fit interiorly of the pipe ends to be welded, the non-consumable base metal ring being effectively continuous with at most a small transverse slit; and a consumable, substantially annular, filler metal spacer ring medially attached to the outer surface of the base ring and projecting radially outwardly therefrom, for spacing apart and for welding the pipe ends together by supplying filler metal from the consumable spacer ring to the weld during a first root pass of a welding operation, the consumable filler metal ring having, in cross-section, a radial leg extending extending medially with respect to and radially outwardly from the outer surface of the base metal ring, and two opposite, transverse legs extending on opposite sides of the radial leg and positioned on the outer surface of th

Abstract: A connector fitting in the form of a sleeve for use on synthetic resin pipes has heating wire let into its inner face for heating the sleeve material and the ends of the pipes to be joined so that a fusion weld is produced. In order to have the wire so fixed in place that on the one hand there is no danger is its being pushed out of place when the pipes are slipped into the fitting, while on the other hand taking care of inaccuracies in the size of the pipes, the wire is let into a cut or groove, that has been opened up, in the fitting and the edges of the cut are overlapped onto the wire so that it is well locked in place.

Abstract: A base having removable side rails for elevating a toilet for use by physically handicapped or elderly persons is disclosed. The base is formed generally in the shape of a flat rectangle having a height equal to the amount by which it is desired to elevate the toilet above a floor for use. A large aperture is formed through the base near the central portion thereof having appropriate plumbing fittings for connecting the bowl of the toilet to the drain. A first pair of smaller apertures are provided to permit the passage therethrough of appropriate threaded fasteners so as to secure the toilet to the floor. A second pair of apertures are formed through the sides of the base to permit appropriate side rails to be inserted therein for use. Each of the side rails includes an adjustable grip which can be positioned and secured in a desired manner so as to assist a person in getting on and off of the toilet seat.

Abstract: 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 the pipe end to be welded. A circular consumable filler metal spacer ring is medially attached to the outer periphery of the base metal ring and extends peripherally radially outwardly to function as a spacing device between adjacent ends of two lengths of pipe to be joined. The consumable spacer ring may be affixed to the base metal ring in a plurality of circularly offset locations by spot welding or may be press-fitted in an alignment groove in the base ring. The consumable spacer ring becomes filler metal during welding.

Abstract: A welding ring is made as a flat ring body, of internal diameter equal to e internal diameter of the parts to be assembled and of outer diameter in excess of the external diameter of the parts to be assembled by the mount of a peripheral edge on each face of which are regularly distributed alternately six locating reliefs which are placed in abutment against the outer diameters of the parts to be assembled. A method of welding with such a ring is also described.

Abstract: A metal outlet fitting intended to be welded over a side opening in a distribution pipe for water or other fluids, is constituted as a metal casting having parting lines adapted to serve the purpose of centering the fitting prior to its attachment. The fitting has a simple tubular configuration open at both ends and preferably provided with exterior lugs to accommodate a spanner wrench as a reinforcement during attachment of piping to it. One end of the fitting has a scalloped shape to fit the side wall of the distribution pipe, and the other end portion can be either internally or externally threaded, or bored to receive a branch pipe. During the welding, the normal parting lines on the exterior can be used as locators or centralizers for matching with cross lines that are scored in the distribution pipe initially to locate the pilot of the hole saw that cuts into the pipe side wall.