Abstract: A conduit (100) comprising a plurality of conduit segments (112A–112C) each having a body (120A–120C) and a segment lining (136A–136C) made of a lining material. Each body includes a joint face (132A–132C) having secured thereto a portion (140A–140C) of the corresponding segment lining. A monolithic lining (108) is formed from the segment linings by abutting the conduit segments with one another so that the joint faces face one another and the portions of the segment linings contact one another. The portions of the lining on the joint faces are heated to a temperature above the melting point of the lining material so that they fuse with one another so as to form a fusion (148A, 148B) located between the joint faces.

Abstract: A riser assembly is provided for transmitting gas from a buried line to a meter manifold. The riser assembly includes an adapter having a mounting structure at one end for connection to a manifold and having an opening at an opposite end. An inner casing has a first end received through the opening and a second end extending therefrom for connection with an associated buried line. A seal assembly is interposed between the inner casing and the adapter for sealing therebetween. A gripping assembly holds the inner casing in the adapter. A protective tubular assembly is received over the inner casing. The tubular assembly has a first end received in the opening and a second end extending therefrom a dimension sufficient to cover the inner casing above ground.

Abstract: A composite lined tube is disclosed having end couplings. The tube includes a resin impregnated fiber preform pressed progressively along an inner wall of the tube. The tube may further include an inflatable bladder inserted into the tube. The bladder is adapted to inflate along a length thereof on application of increasing pressure to the interior of the bladder. The bladder has disposed on its exterior surface the fiber preform impregnated with resin, which is adapted to fit within the tube. The bladder is then inflated along its length by applying increasing pressure to the bladder. The preform is clamped to a shoulder of one of the couplings at another end of the tube, and the end of the preform is trimmed to conform to the shoulder. Pressure is maintained in the bladder while curing the resin.

Abstract: A method and apparatus for coupling together the ends of two steel pipe sections, each of which contains a permeable inner liner, in which not only are the pipe ends held in abutting engagement, but gas contained within the liner of one pipe section is effectively channeled into the liner of the other pipe section.

Abstract: A device for mechanically securing a tubular liner in a pipe having a tubular member and connectors on each end. The connector has a bore with an internal seat that may have grooves and be tapered depending upon the application. The liner extends through the tubular member into the bore. The ends of the liner are radially and plastically deformed into engagement with the seats. An inner ring is positioned inside the liner to retain the end of the liner in engagement with the seat. The inner ring may be held by threads or by radially and plastically deforming it. The connectors are mounted to the tubular member independently of the liner, such as by adhesive. The liner may be replaced by removing the inner rings without affecting the connection between the tubular member and the connectors.

Abstract: A method of forming a liner for a passage such as a sewer includes forming panels composing the liner using a neat resin of a first density and a polymer concrete of a second, higher density. The neat resin is inserted into a mold cavity before the polymer concrete and is displaced upwardly by the polymer concrete pour to impregnate a fiber layer disposed along the periphery of the mold cavity. Resulting panels preferably have an offset joint to increase the joint strength between upper and lower panels forming the liner.

Abstract: Liners useful as piping elbow liners comprising a body liner, a tangential inlet liner, and a tangential outlet liner. The tangential inlet liner and the tangential outlet liner can be removably inserted into a cavity in the body liner. The body liner can comprise two substantially-identical body section liners.

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 threaded metallic pipe for oil extraction industry has a threaded end portion with treated surface in which the metal surface has a roughness (Ra) comprised of 2.0 ?m and 6.0 ?m, which is covered by a uniform layer (7) of a dry corrosion inhibiting coating and a second uniform layer (8) of dry lubricant coating. Alternatively the layers (8, 9) combined into one uniform layer (9) of a dry corrosion inhibiting coating containing a dispersion of particles of solid lubricant.

Abstract: The invention relates to a method for fixing a relatively flexible element (3) in a tube (2) with tight fitting, by arranging around the flexible element a co-displacing member (5) which encloses this element, and forcing the co-displacing member into the tube while co-displacing therewith the flexible element. The co-displacing member can herein be releasably connected to the tube or the flexible element, and the connection can be broken when the co-displacing member is forced into the tube. The invention also relates to an assembly of a tube and a relatively flexible element for receiving therein with tight fitting, for use in such a method, which is provided with a co-displacing member for arranging around the flexible element and enclosing this element. The co-displacing member can be releasably connected to the tube or the flexible element, for instance be formed integrally with the tube, wherein a weakened portion (6) is then formed between the tube and the co-displacing member.

Abstract: An insulated transition spool apparatus for mounting unheading devices to pressure vessels, such as coker vessels, and enabling repetitive operation thereof is disclosed. The apparatus comprises an outer housing, an inner housing that encloses an insulating space between the inner and outer housing, a side feed entry aperture in each housing and a spool adapter flange to facilitate attachment of the spool to the vessel.

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 corrosion-resistant threaded connection including a first tubular member having an outer metal tube of corrosion-prone material and an inner metal lining of corrosion-resistant material, the first tubular member forming a first pin connection having a nose portion comprising a ring of corrosion-resistant material secured, e.g.

Abstract: This invention relates to a connector having an inner polymeric liner with either two opposed flared ends or one flared end and an opposed sealing end, a bendable outer metallic sleeve having two opposed flared ends of essentially similar geometry to either the polymeric liner flared ends or one flared end and an opposed sealing end shelf, and two outwardly facing threaded nuts, each of said nuts having a shelf which engages the opposed flared ends of said metallic sleeve. The connector will often have a ribbed segment between the ends and washers for sealing engagement with the interior wall end portion of the liner at the flared end.

Abstract: A fluid vent (26) for venting fluid from the annulus between the inner surface of a rigid conduit (20) and the outer surface of a conduit liner (10). The fluid vent (26) consists of a length of rigid conduit (34) containing a multiplicity of apertures (32) extending through the wall of the conduit and arranged in an annular pattern around the circumference of conduit (34). The fluid vent (26) further comprises means defining a closed annular volume (36) extending around the exterior circumference of the conduit (34) and interconnecting the outer ends of the apertures (32) with at least one fluid outlet passage (40) located on the exterior of the conduit (34) and communicating with said annular volume (36). The fluid vent can be used to expel water or other liquids from the annular space when retro-fitting a liner to a conduit, venting gas which has permeated through the lining into the annulus, or for assisting in the movement of fluid through the annulus.

Abstract: An attachment is fixed to a fuel tank made of a synthetic resin, and is formed of a primary molding portion and a hydrocarbon barrier layer. The primary molding portion is formed of a first material capable being welded to the fuel tank, and includes a hollow section to be inserted into fuel tank, and a flange formed on the hollow section to be connected to an outer surface of the fuel tank. The hollow section has a plurality of holes for allowing a molten resin material to flow therethrough when formed. The hydrocarbon barrier layer has a property of preventing permeation of hydrocarbon. The hydrocarbon barrier layer is formed on at least a part of an inner periphery of the cylinder section. A connection section is formed at the hollow section to have another member thereon.

Abstract: A threaded joint for steel pipes which is capable of metal-to-metal sealing and which can be subjected to repeated fastening and unfastening without the application of a liquid lubricant containing a heavy metal powder comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box are coated with an undercoating layer and a lubricating coating layer atop it. The undercoating layer is a porous metal coating having a porosity of 5-80% and a thickness of 1-30 &mgr;m and preferably a hardness of 50-250 Hv. The lubricating coating is a solid lubricating coating or a liquid lubricating coating, the latter containing substantially no heavy metal powders. The total thickness of the undercoating layer and the lubricating coating layer is at most 100 &mgr;m.

Abstract: This invention relates to a threaded joint for steel pipes which comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion and which can be prevented from galling during repeated fastening and loosening without application of a compound grease. A solid lubricant coating which comprises a lubricating powder such as molybdenum disulfide and a resin binder is formed on the contact surface of at least one of the pin and the box. The coating is formed by applying a coating fluid and drying the applied coating by first stage heating in the temperature range of from 70° C. to 150° C. and second stage heating in the range of from higher than 150° C. to 380° C.

Abstract: The invention relates generally to a solderless metallic-encased, polymeric-lined connector system.

Abstract: A pipe flange apparatus includes a first pipe flange having a frontal face surrounding a central bore passing through the flange, the face comprising an internal flange recess extending into the flange and surrounding the bore, and a groove extending into the flange and surrounding the internal flange recess, wherein the internal flange recess comprises a textured surface at least partially surrounding the bore. Some such apparatus may also have an internal flange having first and second portions surrounding a bore extending through the internal flange, wherein the first portion is positioned at least partially within the internal flange recess of the first pipe flange and in contact with the textured surface of the first pipe flange. In at least some embodiments the second portion extends into the bore, and a first sealing ring positioned at least partially within the groove surrounding the internal flange recess.

Abstract: A weldable plastic tube has at least one end designed to be butt welded and designed for the conveyance of a fluid producing a drop in mechanical resistance of the weldable plastic. The tube includes an internal layer for protection of the plastic of the tube from contact with the fluid conveyed and adjoining the welding end has a terminal section permanently covered with an external reinforcing sleeve also of weldable plastic to participate in the butt welding of the tube. The sleeve has a thickness such as to make the mechanical resistance of the tube section nearest the welded end at least equal to the mechanical resistance of the tube not in contact with the fluid when in contact with the fluid in the welding zone which will be without the internal protective layer.

Abstract: A composite reinforced line pipe is manufactured by aligning first and second pipe segments each having a composite reinforcement wrapped circumferentially about a core, attaching the line pipes at a cut-back portion of their exposed core, wrapping a joint tape circumferentially about the cut-back portion, wrapping a resin reinforcement tape circumferentially about the joint tape, and curing the joint tape and resin reinforcement tape.

Abstract: A concrete pumping unit, such as a mobile pumping vehicle, including a reduced-weight and/or lengthened boom arm. The pumping vehicle includes a boom arm that is extendible between a folded position and an extended position. The boom arm carries a supply pipe formed from a plurality of pipe sections formed from a lightweight urethane. Each pipe section is formed from a composite material having a reinforcing outer layer and a wear resistant inner layer. Preferably, the outer layer is formed from a braided fiber material while the inner wear resistant layer is formed from urethane. Each boom pipe section includes a pair of end couplings adhesively attached to the outer surface of the boom pipe section.

Abstract: A threaded metallic pipe for oil extraction industry has a threaded end portion with treated surface in which the metal surface has a roughness (Ra) comprised of 2.0 &mgr;m and 6.0 &mgr;m, which is covered by a uniform layer (7) of a dry corrosion inhibiting coating and a second uniform layer (8) of dry lubricant coating. Alternatively the layers (8, 9) combined into one uniform layer (9) of a dry corrosion inhibiting coating containing a dispersion of particles of solid lubricant.

Abstract: In a threaded joint for steel pipes comprising a pin and a box capable of mating with each other, the pin having an externally threaded portion and an unthreaded metal contact portion as a mating surface, and the box having an internally threaded portion and an unthreaded metal contact portion as a mating surface, the mating surface of at least one of the pin and the box is coated with a lower porous zinc or zinc alloy layer by blast plating and with an upper coating which is either a solid lubricating coating (comprising a lubricating powder in an organic or in organic binder) or a liquid, heavy metal powder-free coating (e.g., a liquid coating based on a highly basic organic acid metal salt such as a highly basic metal sulfonate).

Abstract: A welded joint for metal pipes provided with an inner lining, which is resistant to damages caused by the fluids flowing through them. The pipes are machined in the inside at the areas next to the ends to be joined, forming an undercut at each end. An spacer ring is inserted in the hollow annular space formed by both undercuts. The outer diameter of this spacer ring is substantially equal to the diameter of the corresponding undercuts, and its axial length is substantially equal or less than the sum of the axial lengths of the undercuts of the pipes to be joined. The spacer ring is made of an outer annular layer of a high thermal conductivity metal and at least one inner annular layer of heat-insulating and heat resistant material. The outer annular layer abuts in heat conducting contact with the metal pipes within said undercuts, and the metal pipes are joined by a weld seam.

Abstract: The present invention discloses multiple sealing systems for composite risers and methods of preventing interior fluid leakage to the outside of composite risers. Single or multiple elastomeric seals are formed between an elastomer applied in single or multiple grooves provided circumferentially along the outer surface of a metal to composite interface (MCI) of a liner assembly of the composite riser and an elastomeric shear ply provided on the outside of the liner assembly. The elastomeric seals and a seal between the MCI and the liner of the liner assembly provide a multiple sealing system for the composite riser to prevent leakage of interior fluids. In the event that the integrity of the seal between the MCI and liner fails or the integrity of the liner is compromised, the elastomeric seals would prevent leakage of the fluid to the outside of the composite riser.

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: The portable tank defines a chamber within which is disposed a liner having a sealing interface with a tank discharge assembly. The features of the sealing interface of the liner with the discharge assembly and this discharge assembly itself virtually eliminate any risk that contents of the tank will seep or flow into the space outside of the liner and between the liner and the inner walls of the tank. The method of installing and using the liner system are also disclosed.

Abstract: A threaded joint for an oil well pipe is provided which prevents the occurrence of galling at the time of repeated tightening and loosening and which provides a high degree of air tightness and has excellent galling resistance and air tightness without using a liquid lubricant such as a compound grease. 1. A lubricating film of an inorganic polymeric compound which has an M (metal element)—O (oxygen) backbone and has a solid lubricant dispersed therein is formed on a threaded portion or an unthreaded metal contact portion. 2. A phosphate film and the lubricating film of the inorganic polymeric compound is formed on the threaded portion or the unthreaded metal contact portion. 3. A Cu plating layer and the lubricating film of the inorganic polymeric compound or a lubricating film of a resin in which a solid lubricant is dispersed is formed on the threaded portion or the unthreaded metal contact portion. 4.

Abstract: A coating used to seal together surfaces of components is disclosed. The coating reduces costs associated with using gaskets and fine machining of metal components, and has slip characteristics that allow sealed components to move without eroding the coating. The coating is particularly useful in high temperature environments such as the exhaust systems of motor vehicles. Methods of using coatings to seal components are also disclosed.

Abstract: A pipe liner for lining an existing pipe. The pipe liner includes a first elongated portion of plastic material and a second portion extending from the elongated portion with a flexibility which is greater than the elongated portion. The additional flexibility assist the liner in its insertion through an existing pipe.

Abstract: A threaded pipe connector having a replaceable seal member. The tapered pin nose seal area of a high-pressure drill pipe tool joint is provided with an annular corrosion resistant element that is formed separately from the tool Joint. The corrosion resistant element is received in the annular space normally occupied by the tapered pin nose seal. The corrosion resistant element is secured to the tool Joint by a shrink fit technique, mechanical bonding, non-corrosive welding or other suitable means. The desired tapering annular seal surface may be machined on the corrosion resistant element following its placement on the tool Joint or may be pre-formed before being secured to the tool Joint. The corrosion resistant element is removed and replaced as required to repair corrosion damage or other mechanical damage to the seal surface.

Abstract: A method for making a composite lined tube is disclosed, wherein the tube has end couplings on it. The method includes pressing a resin impregnated fiber preform progressively along an inner wall of the tube. In one embodiment, the method includes inserting an inflatable bladder into the tube. The bladder is adapted to inflate along a length thereof on application of increasing pressure to the interior of the bladder. The bladder has disposed on its exterior surface the fiber preform impregnated with resin which is adapted to fit within the tube. One end of the preform is secured to one end of the tube. The bladder is then inflated along its length by applying increasing pressure to the bladder. The preform is clamped to a shoulder of one of the couplings at another end of the tube, and the end of the preform is trimmed to conform to the shoulder. Pressure is maintained in the bladder while curing the resin. In one particular embodiment, the bladder is inflated from its center outwardly to its ends.

Abstract: The oilfield tubular pin and box connection includes double shoulders 16, 22. An inner sleeve 18 engages the box at shoulder 20, and provides one of the two shoulders 16, 22 for engaging the pin. The pin bore optionally may be provided with a similar sleeve 24, thereby providing one of the shoulders for engaging the box. The sleeve 18 may be secured to the box shortly after its manufacture, or may be added as a retrofit to an existing box with a single shoulder.

Abstract: A sealing installation mountable in the interior of a conduit. The installation includes a resilient connector sleeve having connector sealing assemblies at opposite ends of the sleeve. A first seal sleeve has seal sleeve sealing assemblies on opposite ends thereof has one seal sleeve sealing assembly engaging one of the connector sealing assemblies and the other seal sleeve sealing assembly in sealing contact with the interior of the conduit. A second seal sleeve has second seal sleeve sealing assemblies on opposite ends. One second seal sleeve sealing assembly engages a connector sealing assembly and the other seal sleeve sealing assembly is in sealing contact with the interior of the conduit.

Abstract: A device for coupling two pipes made of composite material based on a reinforced thermoplastic, includes a sleeve (40) threaded on its internal wall and intended to be joined to an end (21) of the first pipe (20) and to an end (31) of the second pipe (30). A sealing element (44) creates a seal in the coupling zone. A first end-piece (11) is intended to be fastened to the end (21) of the first pipe and a second end-piece (12) is intended to be fastened to the end (31) of the second pipe. Each end-piece has over at least part of its external surface (13, 14) a screw thread (15, 16) intended to engage in a complementary manner with the screw thread (48) of the sleeve (40).

Abstract: Two pipe sections (1-4, 31, 32) of a high-pressure line each comprise a fluid-tight inner jacket (9) made of a thermoplastic material and a reinforced outer jacket (10). The innner jackets are attached to one another by means of a fluid-tight weld (5-8, 33) and the outer jackets are each connected to one another by means of a connecting sleeve (16, 17, 25, 26). The connecting sleeve comprises shells which have serrations (15, 27) on the inside, as well as clamping means (13, 14, 28-31) for clamping the shells on the pipe sections in such a way that the internal serrations (18, 27) are made to interact with the outer jackets of the pipe sections.

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 tubular connector adapted to extend between two tubular components comprising a tubular body having an internal diameter, a first free end including an annular radial flange having a tapered surface adapted to engage a complementary seating surface on a first of the two tubular components, the internal diameter remaining constant through the first free end; and a second free end having an annular bulbous shape adapted to seat within a cylindrical end of a second of the two tubular components.

Abstract: A double-layer pipe for fluidic transport of abrasive solids, includes a hardened inner pipe portion of steel, an outer pipe portion of weldable steel to surround the inner pipe portion, and terminal coupling collars made of weldable steel. Disposed between the inner pipe portion and the outer pipe portion is a heat-insulating layer which is made of a combustible, non-metallic material.

Abstract: A junction for a flexible tube for high pressure fluids which comprises a sleeve pressed down onto the flexible tube, for coupling with a connection element of the flexible tube, where a female rotating threaded connection element is connected to the connection element. A threaded end element can be associated with the connection element of the flexible tube, wherein the hydraulic seal between the end element and the connection element is guaranteed through the coupling of truncated cone surfaces, provided at least on the end element, with an engagement element that can be connected to the connection element, wherein the truncated cone surfaces and the engagement element are tightened the one to the other using a suitable tightening torque.

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: This invention provides a connection structure for connecting a piping used in automobiles or the like to a ring joint for providing highly reliable gas-tightness. The connection can be performed with an easy and inexpensive method and also can provide excellent productivity and safety. The connection structure has highly reliable disengagement resistance.

Abstract: A high-pressure fuel injection pipe of doubled type, comprising: a thick outer tube; and an inner tube of made a metal and fitted in the outer tube to form a doubled pipe which is formed at its end portion with a connecting head having a face to be fitted on a seat of a mating partner. The outer tube is made of stainless steel or titanium, and the inner tube is formed of a thin metal having a high corrosion-resistance and a high strength and is doubled on the inner circumference of the outer tube throughout its entire length.

Abstract: A lined multi-branch fitting and method of making a lined multi-branch fitting having a plurality of individual confronting housing members assembled about a one-piece, multi-branch, heat degradable liner. The confronting ends of the metal housing members are welded together via a fillet weld. One of the confronting ends includes a radially inner male insulating projecting strip which abuts the liner and insulates the liner from weld heat applied to the other confronting ends. The other confronting end includes a terminal end slot which receives the male insulating projecting strip; the one confronting end includes a radially outer weld recess for receiving an annular fillet weld bead.

Abstract: A method for forming sections of a flexible sealing belt, for expansion ducts is provided. A sheet of flexible sealing belt material is molded, using application of pressure and heat, to impart a desired contour to the belt section, to enable the belt, when installed in an expansion joint, to retain an outwardly extending shape, to resist collapse of the belt into the gap between the duct ends.

Abstract: A device for mechanically securing a tubular liner in a pipe having a tubular member and connectors on each end. The connector has a bore with an internal seat that may have grooves and be tapered depending upon the application. The liner extends through the tubular member into the bore. The ends of the liner are radially and plastically deformed into engagement with the seats. An inner ring is positioned inside the liner to retain the end of the liner in engagement with the seat. The inner ring may be held by threads or by radially and plastically deforming it. The connectors are mounted to the tubular member independently of the liner, such as by adhesive. The liner may be replaced by removing the inner rings without affecting the connection between the tubular member and the connectors.

Abstract: An arcuate double-layer pipe for a pipeline for fluidic transport of abrasive solids, includes an inner pipe portion made of wear-resistant material, and an outer pipe portion of weldable steel in surrounding relationship to the inner pipe portion. A pair of coupling collars made of weldable steel is placed on opposite ends of the inner pipe portion, with each coupling collar having a ring-shaped insert of wear-resistant material and a rim-like projection so that the inner pipe portion extends between the ring-shaped inserts in the coupling collars and is overlapped on the opposite ends by the rim-like projections of the coupling collars. The rim-like projections of the coupling collars engage interiorly into opposite ends of the outer pipe portion for centering the outer pipe portion, with the opposite ends of the outer pipe portion being welded to the coupling collars.

Abstract: A transport pipe for solid materials has a single layer pipe section having a threaded first end and a thread second end. The pipe section has a hardened inner mantle. A first coupling collar having a first threaded collar is threaded onto the threaded first end. A second coupling collar having a second threaded collar portion is threaded onto the threaded second end. Wear-resistant layers are located in the region of the first and second coupling collars. Seals in the form of, for example, O-rings, U-shaped profiles, or flat packings, can be provided between the coupling collars and the pipe section.