Abstract: To provide both a high-pressure metal piping capable of preventing the cavitation or the like or the internal fatigue destruction, as might otherwise occur at a joint head at a branch tube due to the repeated internal pressure of a fluid, and capable of eliminating a fear of corrosion even if a corrosive high-pressure fuel is employed, and a common rail to which the piping is jointed. At a joint portion of a thick steel tube having a relatively small diameter, a joint head is formed of a radially enlarged portion having a larger diameter than that of the thick steel tube, and the radially enlarged portion is formed on its inner circumference into a tapered pressure seat which is diverging outward for a receiving seat of the common rail. Preferably, a thin inner tube, as made of a corrosive metal, is fitted on the inner circumference of the thick steel tube all over the length and is terminated at the tapered pressure seat of the thick steel tube.

Abstract: A plumbing compression fitting for use in coupling a first pipe end of a first pipe to an opposing end of a second pipe includes a coupling housing defining a flow passage therethrough, and having a first pipe securing end for engaging the first end of the first pipe, and a second pipe securing end for engaging the end of the second pipe, the flow passage dimensioned to accommodate the ends of the pipes and having a first cross-sectional area. A capture nut has an axial opening in communication with the passageway and is dimensioned to accommodate the first pipe, the capture nut defining an annular seat and being configured to threadably engage the first pipe securing end of the coupling housing. A grab ring has a circumference and is dimensioned be received in the capture nut, an inner grab surface is dimensioned to circumscribe the first pipe and an outer surface configured to engage the seat.

Abstract: An interlocking intumescent collar is disclosed. The collar may be fitted around a pipe at the point where the pipe penetrates a wall or floor. The collar comprises a strip of intumescent material disposed on a collar body. Anchor tabs extend outward from the collar body and are adapted to be fastened to the wall or floor. The collar includes an interlock integral with the anchor tabs. The interlock holds the tabs in overlapping relationship when the collar is placed around a pipe. The interlock integral with the anchor tabs decreases manufacturing costs and facilitates the field installation of the collar.

Abstract: The invention pertains to a plug connection for pressure systems which consists of two coupling parts, namely a receptacle part (2) and a plug part (4). The plug part (4) can be inserted into a receptacle opening (8) of the receptacle part (2) with a plug shaft (6) such that it is circumferentially sealed and blocked from being separated by a locking device (12). The locking device (12) is realized in such a way that a partially plugged prelocking position (FIG. 1b) and an entirely plugged full locking position (FIG. 1a) are ensured. In the prelocking position, an incomplete seal is produced such that a signal, preferably an acoustically perceivable leakage noise, is generated if the plug connection is charged with pressure. A complete, pressure-tight seal is produced in the full locking position.

Abstract: The present invention discloses a coupling for use in vent systems which is self-sealing. The coupling includes a gasket in a female part of the coupling that seals against an end of a male part. The female part also including a mechanical locking device that clamps onto a recess in the male part to prevent disconnection. The coupling prevents puddling of corrosive fluids in the coupling at points of metal-to-metal contact and, hence, prevents premature corrosion.

Abstract: The present invention relates to a pressure medium plug-in connector, consisting of two connector parts, i.e. a housing part (2) and a plug part (4), wherein the plug part (4) with a plug shaft (6), via at least one peripheral seal (10) located in an annular groove (14) of the one connector part (4) and interacting with a peripheral sealing surface (18) of the other connector part (2), can be inserted in a sealed manner into a receiving opening (8) of the housing part (2) and can be secured against release by means of a locking arrangement (12). The locking arrangement (12) is constructed in such a way that a partially plugged, prelocked position and a completely plugged, fully locked position are ensured. In the prelocked position, a seal is present which is so incomplete that, if pressure is applied with a pressure medium, a clearly limited perceptible leak, particularly in the form of an audible leaking sound, occurs.

Abstract: A device for jointing feeding hose appropriate to such a case as jointing a feeding hose made of synthetic resin to a part-feeding metallic pipe, in which a guiding base plate (20) in the shape of a single plate is connected to a part-feeding pipe (5) and said guiding base plate (20) is provided with a cylindrical holding part (23) for receiving a feeding hose (12) as a mating member so that a fixing piece (25) of the feeding hose is fixed to the guiding base plate (20) in a position spaced from said cylindrical holding part (23).

Abstract: An object of the present invention is to provide galling resistance to a threaded joint used for an oil well pipe. On a thread portion and a metallic sealing portion of the joint, there is provided a manganese phosphate chemical formation coating layer, or alternatively there are provided a nitriding layer of 1 to 20 .mu.m thickness and a manganese phosphate chemical formation coating layer of 5 to 30 .mu.m thickness, and also there is coated a solid lubricant which contains powder of molybdenum disulfide or tungsten disulfide and also contains one of epoxy resin, furan resin and polyamide resin as an essential component, and a ratio of composition is maintained at a specific value, so that a solid lubricant coating layer of 10 to 45 .mu.m thickness can be formed by heating.Due to the above surface treatment, even when the frequency of repetition of fastening and unfastening of the joint is increased, the occurrence of galling can be prevented over a long period of time.

Abstract: A quartz tank for wet semiconductor wafer processing includes one or more ports extending through the tank for the exchange of fluids with the tank. The openings may be aligned with a T-shaped quartz stem having an enlarged end retained on the interior side of said quartz tank in sealing abutment therewith. The lower end of the quartz stem may have external threads to abut with a suitable union. The union may include a nut having a reduced diameter lower end to engage an enlarged end of the tubing member connected to the bottom of the quartz stem. An o-ring seal may be sandwiched between the tubing and the lower end of the quartz stem. The nut may be formed of a carbon-fiber reinforced fluorocarbon material such as perfluoroalkoxy.

Abstract: A tapping sleeve assembly for direct connection to a gate valve. The assembly includes a tapping sleeve attached to a main pipe. An outlet conduit formed integrally with and extend outwardly from the tapping sleeve terminates in a distal end outlet. A retaining ring is attached to the outer surface of the outlet conduit and is located between the tapping sleeve and the distal end outlet. Opposed, longitudinally facing annular surfaces are formed on the retaining ring with one of the annular surfaces facing the tapping sleeve and the other facing the distal end outlet. The annular surface facing the tapping sleeve is inclined. A gland telescopes over the outlet conduit. The gland has a collar with an annular surface engaged with an annular surface of the retaining ring. A gate valve has a socket facing the outlet conduit, a gasket is positioned in the socket and a mechanical joint flange surrounds the socket. Bolts and nuts attach the gland to the mechanical joint flange of the gate valve.

Abstract: A pipe connecting apparatus for connecting a first pipe with a second pipe inserted into the first pipe member is disclosed. The apparatus includes an elastic seal to be disposed within a gap formed between an inner peripheral face of the first pipe and an outer peripheral face of the second pipe, the elastic seal being compressed in an axial direction along the axis of the first pipe for sealing the gap, a press ring fitted on the second pipe, the press ring being movable on the outer peripheral face of the second pipe in the axial direction, and a retainer member fitted on the second pipe, the retainer member having a locked condition in which the retainer member is pressed against the second pipe and a released condition in which the retainer member is radially expanded to be released from the locked condition, the retainer member being switched over from the released condition to the locked condition in association with a movement thereof relative to the press ring.

Abstract: In a piping system having a main pipe or fitting joined to a lateral pipe, a restraint body or sling extends about the fitting or main pipe and is secured at opposite ends to the lateral pipe. The lateral pipe, main pipe or fitting and restraint body are formed of plastic material. The restraint body includes a bend intermediate its ends for wrapping about the fitting or main pipe and has arcuate sections at its ends for solvent-welding to the lateral pipe. Any tendency toward separation of the lateral pipe and the main fitting or main pipe is resisted in tension by the restraint body and the joint is stress-relieved.

Abstract: Threaded connection device for pipes including a cylindrical sleeve having, at both its ends, fasteners for the connection with a flexible pipe, two internally threaded rings each one screwing on one end of the sleeve. These said rings have a circular rim for the seaming and the compression of the pipe around the sleeve fasteners. The sleeve, in connection with the ring thread, has a thread part having a pitch multiple as to the thread pitch of the ring itself.

Abstract: A quick-coupling device for a duct for fluid under pressure, in particular for a motor vehicle, the device comprising a metal sleeve (10) having a first end which includes an overmolded sealing lining (18) and is engaged on an enlarged end (24) of the duct (12), and having a second end which includes an overmolded sealing lining (16) for mounting in sealed manner on the end of an endpiece (32) of a circuit for fluid under pressure. The invention is particularly applicable to motor vehicle circuits for air-conditioning, braking, and power-assisted steering.

Abstract: In order to improve a piping comprising at least one pipe and reinforcement on the outer wall of each pipe in such a way as to increase the maximum permissible internal operating pressure, it is proposed that the reinforcement should be capable of expansion along the length of the pipe and capable of contracting radially in such a way that a bias pressure can be applied to the pipe around its circumference by the longitudinal expansion of the reinforcement.

Abstract: In the case of the pipe connection of two overlapping pipes a flexible ring is arranged between the interior pipe and the exterior pipe and, before the bracing, is axially displaceable on the interior pipe. The flexible ring and the exterior pipe have a spherical interacting outer and inner contour which ensures the angular mobility. The fixing of the pipe connection after the adjustment takes place by two tensioning bows which are fixedly mounted on the exterior pipe. This permits a particularly easy handling during the adjustment and the fixing of the pipe connection.

Abstract: An arrangement and method for connecting a fluid passing conduit to a supporting housing having a conduit receiving bore has a strap assembly disposed about an end portion of the fluid passing conduit and a torque restraining bracket. A plurality of fasteners removably connect spaced end portions of the torque restraining bracket and the strap assembly together and secure the torque restraining bracket to the fluid passing conduit. A fastener connects a middle portion of the restraining bracket to the supporting member and maintains the fluid passing conduit from axial and rotary movement. A sealing member seals between the fluid passing conduit and the supporting member. A pilot ring concentrically pilots the conduit end portion relative to the bore.

Abstract: A heavy weight drill pipe member is disclosed for use in drilling high angle and horizontal well bores in a corrosive environment. The heavy weight drill pipe member consists of a tubular member with a longitudinal bore therethrough, and includes connectors or tool joints attached at each distal end for connecting additional heavy weight drill pipe members. The tubular member and tool joints are preheated, water quenched and tempered to obtain a unique combination of hardness, a yield strength and impact strength for improved resistance to stress corrosion cracking and hydrogen embrittlement in a hydrogen sulfide environment. The tubular member includes a plurality of wear pads or protectors equidistantly spaced along the longitudinal axis of the tubular member to reduce bending stress in the pipe by limiting the degree of bend when the pipe is placed in compression in a high angle well bore.

Abstract: A clip fitting for a hose that includes a hose nipple defining at least one circular groove. A circular seal is positioned in the groove. At least one hose clip is mounted on the hose nipple. At least one clamp is positioned on the hose clip over the seal. The fitting provides an improved seal between the hose and the nipple.

Abstract: A thermal isolation coupling system for attaching a high-temperature fluid-bearing tube to an aperture in a housing, in which a separate low temperature flow is established. Locking means attaches the tube end to the housing, in a particular desired position relative to the aperture. A tube support member connects the tube end to the locking means and facilitates positioning of the extreme tip of the tube end in the low temperature flow, in substantially non-heat conducting isolation from the aperture and the housing.