Abstract: A method and apparatus for assembling a high purity liquid distribution system is described. A distal end portion of the tube is heated then pushed over a sleeve so that the distal end portion can have a shrink seal fit over the sleeve to mitigate accidental or inadvertent pull out of the tube from a fitting. Other benefits are also achieved such as minimal flow restriction of the liquid flowing through the joint and the tube.

Abstract: A method and apparatus for assembling a high purity liquid distribution system is described. A distal end portion of the tube is heated then pushed over a sleeve so that the distal end portion can have a shrink seal fit over the sleeve to mitigate accidental or inadvertent pull out of the tube from a fitting. Other benefits are also achieved such as minimal flow restriction of the liquid flowing through the joint and the tube.

Abstract: A method and apparatus for assembling a high purity liquid distribution system is described. A distal end portion of the tube is heated then pushed over a sleeve so that the distal end portion can have a shrink seal fit over the sleeve to mitigate accidental or inadvertent pull out of the tube from a fitting. Other benefits are also achieved such as minimal flow restriction of the liquid flowing through the joint and the tube.

Abstract: A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing. The fitting includes a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports. The fitting body is configured to receive the tubing system into the first body port. The central passageway has a diameter in the first port selected to allow the secondary tubing into the first body port. A connection system mechanically secures the secondary tubing to the first body port.

Abstract: A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing. The fitting includes a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports. The fitting body is configured to receive the tubing system into the first body port. The central passageway has a diameter in the first port selected to allow the secondary tubing into the first body port. A connection system mechanically secures the secondary tubing to the first body port.

Abstract: A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing. The fitting includes a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports. The fitting body is configured to receive the tubing system into the first body port. The central passageway has a diameter in the first port selected to allow the secondary tubing into the first body port. A connection system mechanically secures the secondary tubing to the first body port.

Abstract: Methods and apparatus are described for producing welded assemblies of plastic parts for use in fluid flow applications. A unit cell structure is disclosed for use in an assembly. One embodiment is an as-molded plastic unit cell structure for use in fabricating welded fluid flow assemblies, the cell structure comprising a hollow tubular body portion having opposed first and second axial ports, a first hollow tubular portion extending axially from a first end of the tubular body portion and defining the first axial port, the first hollow tubular portion having a tube or pipe end configured for welding to another plastic part in a fabrication process for an assembly, and wherein the first tubular portion has a length in a range of 1 mm to 40 mm.

Abstract: Methods and apparatus are described for producing welded assemblies of plastic parts for use in fluid flow applications. A unit cell structure is disclosed for use in an assembly. In an exemplary embodiment, an assembly of welded plastic parts for a fluid flow application includes a plurality of as-molded plastic unit cell structures, each cell structure having a hollow tubular body portion, a first tubular portion extending axially from a first end of the tubular body portion, and second and third opposed transverse tubular portions extending from an intermediate portion of the tubular body portion transverse to the first tubular portion. The first tubular portion of a first unit cell structure is welded to the first tubular body portion of a second unit cell structure in an axially aligned configuration.

Abstract: A torque limiting wrench for tightening nuts on a fitting, and a jaw structure for the wrench. An exemplary embodiment of the wrench includes a handle structure, the jaw structure pivotably mounted to the handle for movement between a tightening position and a fully tightened position. A mechanism applies a force to hold the jaw structure in the tightening position, and allows the jaw to pivot to the fully tightened position when a pre-set torque limit is exceed. The jaw structure including a plurality of spaced teeth supported on a curved jaw arm and having a circumferential extent of less than one half the entire circumference of the nut to be tightened, so that the jaw structure can be engaged to the nut without requiring an axial movement from a first end of the nut toward a second end of the nut.

Abstract: A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing. The fitting includes a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports. The fitting body is configured to receive the tubing system into the first body port. The central passageway has a diameter in the first port selected to allow the secondary tubing into the first body port. A connection system mechanically secures the secondary tubing to the first body port.

Abstract: An embodiment of a portable tube flaring system for flaring a flexible plastic tube end includes a hand-held wand with a heating element for heating a tube heater receptacle, which provides direct contact heating of the tube end about the entire outer periphery of the tube end. A mandrel device is configured for manual insertion into the heated tube end by the user after the tube end is removed from the wand and heater receptacle. A power/control unit is connected to the wand by a wiring bundle to provide electrical power to the heating element, and to optionally provide a visual and/or audio signal to the user for indicating when the tube end should be removed from the wand receptacle, and thereafter, when the mandrel may be removed from the tube end after sufficient cooling or curing time. The system may be carried by a person.

Abstract: A torque limiting wrench for tightening nuts on a fitting, and a jaw structure for the wrench. An exemplary embodiment of the wrench includes a handle structure, the jaw structure pivotably mounted to the handle for movement between a tightening position and a fully tightened position. A mechanism applies a force to hold the jaw structure in the tightening position, and allows the jaw to pivot to the fully tightened position when a pre-set torque limit is exceed. The jaw structure including a plurality of spaced teeth supported on a curved jaw arm and having a circumferential extent of less than one half the entire circumference of the nut to be tightened, so that the jaw structure can be engaged to the nut without requiring an axial movement from a first end of the nut toward a second end of the nut.

Abstract: Methods and apparatus are described for producing welded assemblies of plastic parts for use in fluid flow applications. A unit cell structure is disclosed for use in an assembly.

Abstract: An embodiment of a portable tube flaring system for flaring a flexible plastic tube end includes a hand-held wand with a heating element for heating a tube heater receptacle, which provides direct contact heating of the tube end about the entire outer periphery of the tube end. A mandrel device is configured for manual insertion into the heated tube end by the user after the tube end is removed from the wand and heater receptacle. A power/control unit is connected to the wand by a wiring bundle to provide electrical power to the heating element, and to optionally provide a visual and/or audio signal to the user for indicating when the tube end should be removed from the wand receptacle, and thereafter, when the mandrel may be removed from the tube end after sufficient cooling or curing time. The system may be carried by a person.

Abstract: A method for forming a flare in the end of a flexible tube comprises heating the end of the flexible tube to a near-melted state, inserting the end of the flexible tube into a flare-forming die with a flare forming portion, and pressing a mandrel into the end of the flexible tube, thereby pressure forming a flare in the end of the flexible tube.

Abstract: Methods and apparatus are described for producing welded assemblies of plastic parts for use in fluid flow applications. A unit cell structure is disclosed for use in an assembly.

Abstract: Methods and apparatus are described for producing welded assemblies of plastic parts for use in fluid flow applications. A unit cell structure is disclosed for use in an assembly.

Abstract: Fitting assemblies and methods for connecting a flexible plastic tubing to a fitting. The assembly includes a thin-walled flexible sleeve positioned over a flared end of the tubing and the tube-receiving portion of the fitting in an interference fit.

Abstract: Methods and apparatus are described for producing welded assemblies of plastic parts for use in fluid flow applications. A unit cell structure is disclosed for use in an assembly.

Abstract: A method for forming a flare in the end of a flexible tube comprises heating the end of the flexible tube to a near-melted state, inserting the end of the flexible tube into a flare-forming die with a flare forming portion, and pressing a mandrel into the end of the flexible tube, thereby pressure forming a flare in the end of the flexible tube.