Abstract: Disclosed is an apparatus for conveniently and rapidly removing chips from the interior of a pipe by discharging chips with a portion of fluid out of the pipe using the difference between the pressure in the pipe and atmospheric pressure. The apparatus includes a fitting mounted to a region adjacent to a hole bored in a pipe, a sandwich valve coupled to the fitting, a chip-removing adapter mounted above the sandwich valve, a suction tube extending to an inner surface of the pipe through the chip-removing adapter in order to remove chips from the pipe, a vertical moving unit for vertically moving the suction tube, a delivery tube connected to an upper end of the suction tube and configured to deliver the chips to a predetermined place, and a strainer mounted to a distal end of the delivery tube in order to separate the delivered chips from the fluid.

Abstract: Disclosed is an apparatus for conveniently and rapidly removing chips from the interior of a pipe by discharging chips with a portion of fluid out of the pipe using the difference between the pressure in the pipe and atmospheric pressure. The apparatus includes a fitting mounted to a region adjacent to a hole bored in a pipe, a sandwich valve coupled to the fitting, a chip-removing adapter mounted above the sandwich valve, a suction tube extending to an inner surface of the pipe through the chip-removing adapter in order to remove chips from the pipe, a vertical moving unit for vertically moving the suction tube, a delivery tube connected to an upper end of the suction tube and configured to deliver the chips to a predetermined place, and a strainer mounted to a distal end of the delivery tube in order to separate the delivered chips from the fluid.

Abstract: A double plug head for plugging a pipe. The double plug head includes a primary rubber packing, a roller support, a tube support and a rubber tube. The primary rubber packing is provided on a mounting plate of a plugging machine. The roller support is provided with a plurality of rollers. The tube support is provided between the primary rubber packing and the roller support. A tube seating depression is formed around the circumferential surface of the tube support. A fluid feed path is formed in the tube support. The rubber tube is seated into the tube seating depression and has a nipple connected to an outlet of the fluid feed path. Communication holes which communicate with the fluid feed path are respectively formed in the primary rubber packing and the mounting plate. A fluid hose is connected to the communication hole of the mounting plate.

Abstract: A pipe interruption fitting having a flange is removable after pipe maintenance work has been completed. The fitting includes an upper reinforcing plate, an inner surface of which has a curvature corresponding to an outer surface of the pipe, and a vertical pipe welded to the upper reinforcing plate. The fitting further includes an adaptor welded to the vertical pipe. Bolt holes are formed in an upper surface of the adaptor. A through hole is formed through the adaptor. An annular groove is formed in an inner surface of the through hole. The flange is removably coupled to the adaptor. Coupling holes are formed in the flange for installation of a boring machine or a stopple machine. The fitting further includes a plug fitted into the through hole of the adaptor and having an expansion plate to be inserted into the annular groove. A cover is adapted to be inserted into the through hole of the adaptor and to be welded thereto.

Abstract: A plug for a pipeline fitting is provided and includes a cylindrical body having an annular sealing groove, an O-ring fitted in the annular sealing groove, an expanding plate having an outer edge inserted into an annular locking groove of the pipeline fitting, and an expanding device connected to a plugging machine to insert the expanding plate into the locking groove of the fitting. The expanding plate is divided into two half plates and has a central opening with a minor axis in the direction of expansion and a major axis perpendicular to the expansion direction. The expanding plate has elongated holes and pins formed at positions symmetrical with respect to the dividing line of the expanding plate. The cylindrical body has threaded holes formed at positions corresponding to the elongated holes of the expanding plate. Screws are screwed into the threaded holes through the elongated holes to couple the expanding plate to the cylindrical body. The cylindrical body has a central circular recess.

Abstract: A plug for a pipeline fitting is provided and includes a cylindrical body having an annular sealing groove, an O-ring fitted in the annular sealing groove, an expanding plate having an outer edge inserted into an annular locking groove of the pipeline fitting, and an expanding device connected to a plugging machine to insert the expanding plate into the locking groove of the fitting. The expanding plate is divided into two half plates and has a central opening with a minor axis in the direction of expansion and a major axis perpendicular to the expansion direction. The expanding plate has elongated holes and pins formed at positions symmetrical with respect to the dividing line of the expanding plate. The cylindrical body has threaded holes formed at positions corresponding to the elongated holes of the expanding plate. Screws are screwed into the threaded holes through the elongated holes to couple the expanding plate to the cylindrical body. The cylindrical body has a central circular recess.

Abstract: A horizontal cutting type-tapping machine has a vertically extending drive shaft and a pair of detachably engaged surface gears. The surface gears have a curved upper surface gear, fixedly connected to the drive shaft, and a lower surface gear. A gearbox is connected to the lower surface gear and converts a horizontal rotating force of the drive shaft to a vertical rotating force. An externally threaded shaft is horizontally mounted to a vertically rotating gear of the gearbox. An internally threaded sleeve is disposed in the gear housing of the gear box and engages the externally threaded shaft so as to be horizontally moved by rotation. A saw part is fixed to a front end of the internally threaded sleeve. An internal tube, mounted around the drive shaft, has a thread at its upper portion and a lower portion with a diameter smaller than that of the upper portion. A vertically moving sleeve is slidably mounted around the lower portion of the drive shaft.

Abstract: A branch apparatus for a pipe and a branch method using the same connect a branch pipe installed to a place requiring a fluid such as a gas, a chemical substance and water to a main pipe through which the fluid flows. The branch apparatus for a pipe and the branch method using the same make a laying depth of the main pipe be identical with that of the branch pipe by horizontally installing a branch apparatus, and thus make the branch pipe receive both a low vibration and a small load from the ground. The branch apparatus includes a T-type pipe having a horizontal pipe whose both ends are opened and a vertical pipe connected to an upper part of a center of the horizontal pipe; a reinforcement plate welded to the main pipe for being welded to one end of the horizontal pipe of the T-type pipe; a flange which is welded to an upper part of the vertical pipe of the T-type pipe, and has female screw lines in a center thereof; and a plug coupled with the center of the flange.