Abstract: An arrangement for cooling or heating of a flange bolt for turbines comprises one or more boreholes, that extend through the bolt, and inlet and outlet pipes that are connected to each end of the borehole. A cooling or heating medium such as air, steam or any other fluid flows through an inlet pipe into and through the borehole thereby cooling or heating the bolt, and exits from the borehole via an outlet pipe. The cooling or heating arrangement enables direct cooling or heating of the bolt itself and ensures stable bolting forces throughout the operation of the turbine. The flange bolts with this arrangement may be applied to gas turbines or steam turbines operated at elevated steam temperatures and pressures.

Abstract: An apparatus (10) for connecting and sealing duct sections is adapted for connecting and sealing round ducts (100), round oval ducts (200), and other commonly used ducts. The apparatus includes first and second connectors. Each connector includes a tubular member (20) having an outside diameter that is incrementally smaller than the inside diameter of the duct to which it is attached. An O-ring (40) carried in an O-ring channel defined in the tubular member makes an air-tight seal with the duct. A radially directed annular flange (50) extends outwardly from an outer end of the tubular member. An outer perimeter of the flange forms a rolled edge (60). A gasket (70) may be carried between the outer surfaces of adjacent flanges of first and second connectors associated with first and second ducts to be joined. Duct sealer (80) may also be carried between the outer surfaces, with or without a gasket. A plurality of fasteners (90) may be used to fasten the flanges together.

Abstract: A metal pipeline section that has a metal flange at one end is lined with a plastic liner such that some of the liner extends beyond the flange end of the pipeline section. An annular plastic member is electrofusion joined onto the outside of the portion of plastic liner which extends beyond the flange end of the pipeline section and any liner extending beyond the annular plastic member is trimmed off to make the liner flush with the annular plastic member. The annular plastic member is then positioned adjacent the annular plastic member of another similarly prepared pipeline section and a containment ring is secured around them to restrain any outward movement of the annular plastic members when the pipeline is in use. The metal flanges are secured to each other such that the annular plastic members are compressed between them to prevent leakage.

Abstract: A pipe joint is made up of a hollow cylindrical joint body made of an elastic material with a prescribed length, a circular flange embedded into each of the ends of the joint body, through holes provided axially at prescribed intervals in the direction of the circumference of the flanges and the joint body, and both flanges connected to the joint body with a connecting appliance penetrating into these through holes.

Abstract: Glass modules for use in the assembly of equipment, installations and for pipe works, the surfaces of which are entirely or partially coated with a conductive coating, in particular from transparent conductive polymers for the purpose of reducing surface resistance, their use, as well as the equipment, installation and pipe works made therefrom.

Abstract: A band clamp used to connect tubular bodies such as vehicle exhaust system components. The band clamp has a band extending from a first end to a second end and includes a pair of spaced ribs extending at least part way between the first and second ends. A tightening mechanism is connected to the band and includes two clamp members movable toward and away from each other for tightening and loosening of the band. The band clamp further includes a gasket located on an inner surface of the band between the ribs and extending between the first and second ends. The use of the ribs with the interposed gasket provides a mechanical interlock of the band clamp with the tubular bodies while providing a hermetic seal at the junction between the two bodies.

Abstract: A gasket system for sealed interfaces utilizes a carrier ring having inner and outer compression stops to account for and control flange rotation effects in order to achieve a uniform and constant gasket seating stress across the sealing region. The inner compression stop provides a fixed fulcrum for flange rotation. The inner and outer compression stops have different heights, dependent upon the characteristic flange rotation, that allow the orientation of the sealing material to be angularly matched to the flange side profile and that allow the sealing material to be fully captured within the sealing region upon full compression, minimizing creep relaxation. A visual compression indicator on the circumference of the carrier ring permits assembly of the interface without the use of specialized or calibrated tools.

Abstract: A block fitting for coupling tubing segments having a pair of seals, one of the seals being a radial seal and the other seal being an axial seal, wherein the fitting militates against leakage during operation of an air conditioning system upon failure of one of the pair of seals.

Abstract: An apparatus for connecting first and second conduits to carry a fluid under pressure comprises a first face attached around an open end of the first conduit and a pocket face attached around an open end of the second conduit and defining a pocket. The first face is fastened to the pocket face such that the first face is substantially perpendicular to walls of the pocket and adjacent to an open end of the pocket. A gasket member is slidingly engaged in the pocket and defines a passageway through a central portion thereof. The gasket member has a gasket face adjacent and substantially parallel to the first face and an opposite pressure face inside the pocket. A bias element exert a bias force on the gasket member toward the first face and a pocket seal seals an outer periphery of the gasket member to the walls of the pocket.

Abstract: A connecting device for connecting first and second tubular pieces of an aircraft turbine engine may include a rigid ring with an at least approximately S-shaped cross section. The rigid ring is housed in a recess of an acoustic protection cellular core of the first tubular piece and includes: (1) an external branch, which bears against an external skin of the second tubular piece and is secured to the latter by a first fixing device; (2) a back, arranged facing an edge face of the cellular core; (3) a front arranged facing the first tubular piece, after the first and second tubular pieces have been connected; (4) a transverse branch connecting the back to the front; and (5) an internal branch connected to an internal skin of the second tubular piece and secured to the latter.

Abstract: A welded flange connection and methods and apparatus for producing the connection are disclosed. A weld insert is disposed between the flared ends of abutted plastic pipe or plastic-lined pipe sections. The weld insert includes an annular support disc having a resistance heating element disposed at least about the inner circumference of the disc. When held tightly between the flared ends of abutted pipe sections power can be applied to the heating element to produce sufficient heat to temporarily raise the temperature of the adjacent surfaces of the flared sections of pipe above their melting point. When the weld is cooled, a strong, fluid-tight, thermoplastic weld is formed. A welded flange connection using the weld insert of the present invention effectively and efficiently produces high quality, fluid-tight connections in plastic pipe and plastic-lined piping systems.

Abstract: A line fitting employs blocks secured together with a stud and a nut and having gaskets or seals which militate against permeation of CO2 when subjected to high pressures and high temperatures, the seals are also resistant to decompression damage.

Abstract: A plug connection device (1), in particular for securing and tightening fluid couplings (11), has a holding device with a holder (14), a plug-in element (26) and an extension spring element in the form of an annular extension spring (23). The annular extension spring (23) acts as a wedge between an annular surface (32) formed on the plug-in element (26) and an annular rim (19) formed on the holder (14). The annular extension spring (23) can perform a rolling movement around its chord center axis (24). A particularly low static friction is present here because of the support of the annular extension spring (23) on the annular rim (19), which permits a continuous automatic re-tightening of the holding device (12).

Abstract: A one-piece block connects flanged fluid-flow connectors. Each connector includes a central port and at least two tabs, the tabs having apertures for affixing the connector to the block. The dimensions of the block and the connector are such that the block can accommodate a given number of connectors in a smaller space than required in the prior art. Moreover, the maximum working pressure of the connector can still be as large as about 5000 psi. Channels formed within the block allow fluid communication from one connector to another.

Abstract: An arrangement at pipe flange connections (1) of the type in which the flange halves (2, 4) of the pipe connection (1) are squeezed together by means of screw-bolt joints (8) during assembly, and where one or more spacers (18) are positioned between the pipe flange halves (2, 4).

Abstract: A coupler for joining an aluminum conduit to a steel or stainless steel conduit is described and which includes a main body which is formed from a first layer of aluminum and a layer of steel or an iron-chromium alloy which are explosively welded together, and wherein the main body has a first aluminum surface, and an opposite, second steel or iron-chromium alloy surface, and wherein the aluminum conduit is welded to the first aluminum surface, and the steel or stainless steel conduit is welded to the second steel or iron-chromium surface.

Abstract: A threaded pipe flange and piping system utilizing the same. The threaded pipe flange includes a base portion having a predetermined shape and at least two openings dimensioned to accept at least two mounting bolts. A shoulder portion extends from, and is integral to, the base portion and includes at least two substantially flat gripping surfaces that allow the flange to be attached using an open end wrench, adjustable wrench or pipe wrench. A threaded opening extends through the base portion and the shoulder portion and is sized to mate with the threaded pipe to which the flange is to be attached. In operation, the pipe flange is attached to the predetermined threaded pipe by aligning the threaded opening with the predetermined threaded pipe, gripping the gripping surfaces of the shoulder portion, and rotating the pipe flange until the flange is tight.

Abstract: An adjustable base unit includes a pair of upper and lower frameworks, a connection sleeve attached to the lower framework and having opposite end portions for extending into and providing flow communication through the unit and between an upper fill tube and a lower blower pipe of a silo filling apparatus, and elements for adjustably interconnecting and spacing apart the upper and lower frameworks with respect to one another. When the unit is interposed between the fill tube and blower pipe and the upper and lower frameworks are respectively detachably attached to the fill tube, connection sleeve and blower pipe, the upper framework can be angularly tilted by adjusting selected ones of the interconnecting elements in any one of several different orientations relative to the lower framework so as to correspondingly angularly adjust the mounting disposition of the fill tube on the blower pipe and thereby the position of the fill tube within the silo.

Abstract: A block fitting for coupling tubing segments having a pair of seals, one of the seals being a radial seal and the other seal being an axial seal, wherein the fitting militates against leakage during operation of an air conditioning system upon failure of one of the pair of seals.

Abstract: An apparatus for connecting first and second tubular bodies comprising first and second flange assemblies, each of which has a hub and an annular flange in surrounding relationship to the hub, the hubs and flanges having engageable, complementary frustoconical surfaces that, when the first and second flange assemblies are subjected to compressive loading by means of threaded studs and nuts, cooperate to urge seal faces on the hubs into metal-to-metal sealing contact.

Abstract: The present invention relates to the joining of lined pipes, particularly lined pipes for high pressure applications. A metal pipeline section that has a metal flange (13) at one end is lined with a plastic liner (15) such that some of the liner extends beyond the flange end (13) of the pipeline section. An annular plastic member (16) is electrofusion joined onto the outside of the portion of plastic liner (15) which extends beyond the flange end (13) of the pipeline section and any liner extending beyond the annular plastic member is trimmed off to make the liner flush with the annular plastic member (16). The annular plastic member (16) is then positioned adjacent the annular plastic member of another similarly prepared pipeline section and a containment ring (17) is secured around them to restrain any outward movement of the annular plastic members when the pipeline is in use.

Abstract: This invention is directed to a novel multi-piece flange connector used for connecting a pump housing to a fluid conduit. The pump flange is comprised of a flange blank, an insert plate, and a seal. The flange blank is adapted to be connected to the housing of a pump and includes a central bore adapted to allow the passage of fluid. The flange blank also includes a recess surrounding the bore that is adapted to accept the insert plate and the seal. The flange blank is connected to the pump housing by the use of bolts or other fasteners that pass through apertures in the flange blank beneath the insert plate. The insert plate includes a seal member that prevents fluid from the central bore from leaking outside of the flange.

Abstract: The present invention is directed at an exhaust flange assembly comprising flanges formed by powder metallurgical methods for attachment to exhaust pipes. The first flange preferably comprising a first surface having a cavity and a pipe attachment surface opposite the first surface. The second flange comprises a sealing surface having a shape complementary to the cavity of the first flange and a pipe attachment surface opposite the sealing surface.

Abstract: A block fitting for coupling tubing segments having a pair of seals, one of the seals being a radial seal and the other seal being an axial seal, wherein the fitting militates against leakage during operation of the air conditioning system upon failure of one of the pair of seals.

Abstract: Connection means for interconnecting two duct ends, the means comprising a tubular connection member for uniting the duct ends, the tubular member comprising at least one pair of half-bodies which is arranged so as to be closed on at least one duct end and which is associated with means for gripping said duct end when the pair of half-bodies is closed on said duct end, the gripping means comprising at least one outwardly-directed projection formed by plastic deformation of the duct end in a position set back from an end face of said duct end, and two inner shoulders of at least one of the half-bodies, which shoulders are spaced apart axially so as to receive therebetween the outwardly-directed projection.

Abstract: A block fitting for coupling tubing segments having a pair of seals, one of the seals being a radial seal and the other seal being an axial seal, wherein the fitting militates against leakage during operation of the air conditioning system upon failure of one of the pair of seals.

Abstract: An end-sided closure of a pipe having the following features: a flanged-socket metallic member one end of which is welded to the pipe to be closed and the other end of which is designed for being orbitally welded to a pipe joining it and the outer surface of which has formed thereon an annular flange which has axially parallel threaded bores at circumferential spacings, a cap-shaped closing member adapted to be placed onto the other end of the flanged-socket member with a ceiling portion and an annular wall portion wherein the inner surface of the ceiling portion is adapted to sealingly bear against the front-end face of the other pipe end and wherein the wall portion has axially parallel through bores which can be aligned with the threaded bores, and headed screws which are adapted to be inserted through the through bores from the ceiling portion and can be turned into the threaded bores wherein the heads of the screws bear against an abutment surface of the sealing portion in order to press the inner sur

Abstract: The invention relates to an arrangement in a pump block. The pump block includes a plurality of pump valves each connected to a piston in a piston pump. The pump block also includes an inlet pipe which is common to all of the pump valves. The inlet pipe has a connection to each pump valve. One connection between the inlet pipe and the pump block is fixed and includes a flange fixedly screwed in the pump block, the remaining connections are movable in the longitudinal direction of the inlet pipe. The movable connections each include a flange with over-dimensioned boltholes in which a spacer is placed.

Abstract: The invention relates to a flanged connection for jacketed high-pressure pipes rated for 300 to 10,000 bar, in which the jacket pipe end of at least one of the two jacket-side high-pressure pipe flanged connections is designed as jointed flange, said flange being fixed on the outer side of the high-pressure pipe by means of a jointed connection, said connection being suited to absorb the longitudinal forces in axial direction of the high-pressure pipe and the jointed flange being provided with the bores necessary for the bolts.

Abstract: An extension portion extending outwardly is integrally formed on the edge of an end portion of an exhaust pipe; a collar is fixed on the outer periphery of the end portion of the exhaust pipe by caulking; and the edge of the outer end of the collar is abutted against the extension portion. The aforementioned arrangement provides a connection portion of an exhaust pipe for an engine which is intended to rigidly connect the exhaust pipe to an exhaust port of the engine, to prevent gas leakage by eliminating the occurrence of clearance at the connecting portion, to reduce the flow resistance of exhaust gas in the exhaust pipe, and to reduce the production cost of the connection portion.

Abstract: An erosion resistant pipe flange assembly for preventing erosion of metal pipe flanges connecting two joints of pipe. The erosion resistant pipe flange assembly includes a flange section, a reducer section integrally formed with said flange section, and a replaceable liner for preventing erosion and abrasion of the interior of said pipe flange assembly.

Abstract: A segmented pipe coupling includes traction bolts that permit movement of shanks of the traction bolts into an attitude in which the head and nut of the traction bolts engage their respective bolting faces in continuous engagement, thus to eliminate a drop in tensile stress in a shank of the traction bolt due to shifting of the head of the bolt or the nut subsequent to initial torquing down of the nut.

Abstract: A corrugated spiral pipe with a coupling device comprises a pipe body 10, a pair of flanges 20, and a pair of binding bands 30. The pipe body 10 has a cylindrical shape and is prepared to have a spirally corrugated shape 11. The pair of the flanges 20 are formed in one body of outer circumferences of both end portions of said pipe body 10, each of the flanges 20 having a large outer diameter portion at an end portion of the flange 20 and a small outer diameter portion 21 at a longitudinally inside portion of the flange 20.

Abstract: A flexible connector apparatus for decoupling vibrations, for example, along the components of an internal combustion engine exhaust system. The flexible connector apparatus is provided for connecting first and second components in the exhaust system, and includes a bellows for accommodating relative movement between the first and second components. The flexible connector apparatus includes an attachment construction which enables weldless, gasketless connection of the bellows to at least one of the first and second components. The flexible connector apparatus may include a liner tube structure having inlet and outlet liner tubes.

Abstract: A block for a modular fluid block assembly is disclosed. The block includes first and second opposed faces and first and second apertures from the first face to the second face for receiving a fastener. Each aperture includes a first end and a second end and a head receiving cavity disposed adjacent the first end. The block further includes a fluidic passage passing from the first face to the second face and a pair of fastener receiver cavities in the first face. The block further includes a pair of head receiving cavities in the second face.

Abstract: The present invention is directed to a welded flange connection and to methods and apparatus for producing the connection. A weld insert is disposed between the flared ends of abutted plastic pipe or plastic-lined pipe sections. The weld insert includes an annular support disc having a resistance heating element disposed at least about the inner circumference of the disc. When held tightly between the flared ends of abutted pipe sections power can be applied to the heating element to produce sufficient heat to temporarily raise the temperature of the adjacent surfaces of the flared sections of pipe above their melting point. When the weld is cooled, a strong, fluid-tight, thermoplastic weld is formed. A welded flange connection using the weld insert of the present invention effectively and efficiently produces high quality, fluid-tight connections in plastic pipe and plastic-lined piping systems.

Abstract: The present invention relates to an axisymmetric structural component, one of the ends of which is fitted with an inner circular flange for assembling, by bolting. The axisymmetric structural component with a second axisymmetric structural component. The flange comprises housings for receiving fixing elements such as bolts, pins or threaded rods. The housings are arranged on the circumference of the said flange at regular intervals. Each housing is, in longitudinal section (A—A) along a plane passing through the rotational axis of the component, T-shaped and consists of a first essentially cylindrical portion which is longitudinally open on the inner face (x) of the axisymmetric structural component and transversely open on the contact face (y) of the flange in the assembly. A second essentially semi-cylindrical portion is mounted on the flange which is also longitudinally open on the inner face (x) of the said structural component having an essentially D-shaped transverse section.

Abstract: A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion-projects axially outwardly beyond a radial forming surface (60) on the mandrel (14). A first forming roller (30) is mounted on a swing post (52) that is positioned by an adjustable length strut (56). The strut (56) is elongated to swing the post (52) downwardly and place the roller (30) inside the second end portion of-the workpiece (20). Then, a lead screw (28) is used for pulling on a base (50) that supports the post (52). This pulls a convex face portion (32) of the roller (30) against the inside of the second end portion of the workpiece (20). Lead screw operation moves the roller (30), causing it to stretch the second end portion of the workpiece (20) and move it up onto and then move it radially outwardly along the forming surface (60).

Abstract: A band clamp used to connect tubular bodies such as vehicle exhaust system components. The band clamp has a band extending from a first end to a second end and includes a pair of spaced ribs extending at least part way between the first and second ends. A tightening mechanism is connected to the band and includes two clamp members movable toward and away from each other for tightening and loosening of the band. The band clamp further includes a gasket located on an inner surface of the band between the ribs and extending between the first and second ends. The use of the ribs with the interposed gasket provides a mechanical interlock of the band clamp with the tubular bodies while providing a hermetic seal at the junction between the two bodies.

Abstract: A duct assembly made from multiple duct sections for transporting pressurized fluid therethrough which can be formed simply by laborers at a building site or elsewhere and has a strong joint resistant to leakage. The joint rigidizes each duct section and the duct assembly, permitting duct assemblies including a greater number of joined duct sections to be put together and lifted into place The joint is formed by passing fasteners through a corner flange connection member associated with one duct section, through integral flanges of the one duct section and other duct section arranged in end-to-end relation with the one duct section, and through a corner flange connection member associated with the other duct section. The act of installing the fastener tightly pulls together the integral flanges and makes and integral connection between them.

Abstract: A one-piece, flanged, fluid-flow connector for connecting tube, pipe, hose or the like to a port face includes a base having a flat port face on one end, and a connection piece fixed to and extending from the other end. A set of tabs extends from the base, the tabs having apertures for mounting the connector. The base includes a reinforcement portion that transitions continuously from a lesser thickness adjacent the tabs to a greater thickness adjacent to the connection piece. The connector makes it feasible to provide a one-piece, two-bolt connector which occupies substantially less space than a comparable connector of the prior art, but which handles at least the same fluid pressures.

Abstract: The present invention is a flanged connection repair device and method for flanged pipe joints and the like that produces axial compression against the flanges of the joint so that the flange bolts may be removed and replaced, while simultaneously producing radial pressure on the sealant between the flanges, mechanically and radially compressing the sealant into the joint, directing the sealant around the full perimeter of the flanged joint. By providing both axial and/or radial compression the invention stops leaks in the pipe without interrupting the use of the pipe, duct work, and the like, and can be used permanently or temporarily, repeatedly, and under a variety of conditions including moderate to high internal pressures, vacuums, and temperatures.

Abstract: An apparatus (10) for connecting and sealing duct sections is adapted for connecting and sealing round ducts (100), round oval ducts (200), and other commonly used ducts. The apparatus includes first and second connectors. Each connector includes a tubular member (20) having an outside diameter that is incrementally smaller than the inside diameter of the duct to which it is attached. An O-ring (40) carried in an O-ring channel defined in the tubular member makes an air-tight seal with the duct. A radially directed annular flange (50) extends outwardly from an outer end of the tubular member. An outer perimeter of the flange forms a rolled edge (60). A gasket (70) may be carried between the outer surfaces of adjacent flanges of first and second connectors associated with first and second ducts to be joined. Duct sealer (80) may also be carried between the outer surfaces, with or without a gasket. A plurality of fasteners (90) may be used to fasten the flanges together.

Abstract: A seal retaining system for retaining a seal ring in a pipe coupling, wherein a plurality of seal ring retainers are connected to a flange around the periphery of a seal seat and wherein the retainers can be moved from an open position in which a seal ring can be placed on or removed from the seal seat to a closed position in which the seal ring is retained in position on the seal seat. In one embodiment, each retainer comprises a rotatable cam having a lip which extends generally around the circumference of the cam, but is truncated on one side. When the truncated portion faces the seal seat, the seal ring can be installed or removed. When the truncated portion faces away from the seal seat, the seal ring is held in position on the seal seat. The cams may be attached with bolts that can be sheared off if the cams are frozen in position.

Abstract: To provide a connection portion of an exhaust pipe for an engine, which is intended to rigidly connect the exhaust pipe to an exhaust port of the engine, to prevent gas leakage by eliminating occurrence of clearance at the connecting portion, to reduce the flow resistance of exhaust gas in the exhaust pipe, and to reduce the production cost of the connection portion. An extension portion extending outwardly is integrally formed on the edge of an end portion of an exhaust pipe; a collar is fixed on the outer periphery of the end portion of the exhaust pipe by caulking; and the edge of the outer end of the collar is abutted against the extension portion.

Abstract: A cantilevered conduit connection including a connecting block circumscribing a conduit and mounting to a fluid component where an anti-cantilever fastener mounts to a back surface of the connecting block. The anti-cantilever fastener includes a cusp portion bent toward and in contact with the back surface and induces a positive bending moment across the back surface of the connecting block for urging the connecting block flat against the fluid component and for positioning the conduit squarely within the fluid component. A device for fastening the anti-cantilever fastener and connecting block to the fluid component is also provided.

Abstract: A ball and socket misalignment coupling includes a socket flange, ball member, retaining flange, threaded studs, and threaded retaining rings of limited shear strength. The threaded retaining rings function to permit the coupling to be pre-assembled. When the pre-assembled coupling is installed into service by using the threaded studs and associated nuts to bolt the coupling to a standard flange, the threaded rings are stripped out and remain in the assembly without obstructing the function of the coupling. The threaded retaining rings fit into recesses in the flanges through which the studs insert. The threaded retaining rings may made as a single-piece construction made from a material that has a yield and shear strength lower than that of the threaded studs about which they are mounted, or may be made as a two-piece threaded ring having inner threaded portion and a separate outer portion, each with differing material construction.

Abstract: A seal retaining system for retaining a seal ring in a pipe coupling, wherein a plurality of seal ring retainers are connected to a flange around the periphery of a seal seat and wherein the retainers can be moved from an open position in which a seal ring can be placed on or removed from the seal seat to a closed position in which the seal ring is retained in position on the seal seat. In one embodiment, each retainer comprises a rotatable cam having a lip which extends generally around the circumference of the cam, but is truncated on one side. When the truncated portion faces the seal seat, the seal ring can be installed or removed. When the truncated portion faces away from the seal seat, the seal ring is held in position on the seal seat. The cams may be attached with bolts that can be sheared off if the cams are frozen in position.

Abstract: An apparatus for connecting first and second tubular bodies comprising first and second flange assemblies, each of which has a hub and an annular flange in surrounding relationship to the hub, the hubs and flanges having engageable, complementary frustoconical surfaces that, when the first and second flange assemblies are subjected to compressive loading by means of threaded studs and nuts, cooperate to urge seal faces on the hubs into metal-to-metal sealing contact.

Abstract: A coupling for two pipe sections having integral buoyancy cans, wherein the coupling includes two coupling flanges, each having an inner flange portion configured to couple the pipe stems of the pipe sections and an outer flange portion configured to brace or secure the buoyancy cans of the pipe sections against each other and thereby stabilize the pipe sections. In one embodiment, the inner and outer flange portions of each coupling flange are connected by a plurality of connecting plates. Each coupling flange also includes a plurality of reinforcing plates between the inner and outer flange portions. Each of the inner flange portions is configured as a female box flange. In one embodiment, a pin flange is positioned between the inner flange portions in the assembled coupling to form pin-and-box connections with the inner flange portions. The outer flange portions are bolted together to secure the coupling.