Apparatus and method for shielding leakage from a flanged pipe coupling comprising: a housing having a front wall, a rear wall, and a top wall, the top wall depending downwardly to form side walls intermediate the front and rear walls thus forming a closure having a bottom which is open; wherein the housing contains an interior space in between the front and rear wall and below the top wall, the interior space shaped to fit around a flanged pipe coupling; and wherein the housing is shaped so as to prevent rotation of the apparatus with respect to the flanged pipe coupling.

Apparatus and method for shielding leakage from a flanged pipe coupling comprising: a housing having a front wall, a rear wall, and a top wall, the top wall depending downwardly to form side walls intermediate the front and rear walls thus forming a closure having a bottom which is open; wherein the housing contains an interior space in between the front and rear wall and below the top wall, the interior space shaped to fit around a flanged pipe coupling; and wherein the housing is shaped so as to prevent rotation of the apparatus with respect to the flanged pipe coupling.

A liner assembly and method for lining a damaged pipe junction between a main and lateral pipe is provided. The liner assembly includes a main liner member and a lateral liner tube. A collar disposed near the juncture between the main liner member and lateral liner tube is impregnated with a liquid hydrophobic or hydrophilic material capable of curing in a flexible or rigid state with the material expanding in the presence of water. The hydrophobic or hydrophilic material can also be applied without the use of the collar. When the liner assembly is pressed against the main and lateral pipes, a portion of the hydrophilic or hydrophobic material is forced into the damaged pipe junction.

A crack arrestor apparatus and method for making same by applying layers of a composite material of non-metallic fibers and resin around a length of pipe; the fibers generally aligned with the pipe circumference. The applied layers have a thicker portion in the middle and a thinner portion on the ends. Part of the pipe covered by the thicker portion is then yielded by application of radial force past the elastic limit of the pipe, thereby creating circumferential tension on the composite. At least a portion of the composite remains in circumferential tension upon release of the radial force. The residual stresses in the yielded metal pipe assist to arrest crack propagation. Thereby, the process to arrest a crack in a metal pipe includes maintaining circumferential tension in a composite residing around the pipe while maintaining compressive circumferential residual stress on the metal pipe covered by the composite.

The present invention provides leakage plugging devices and methods for sealing a leakage at a remote site in a pipe, the device including a porous carrier plug of a deformable material including pores and at least one sealant composition disposed in the pores, wherein the porous carrier plug is adapted to transport the at least one sealant composition from a first site to a remote site and to plug the leakage at the remote site.

A trap door cap for sealing around a trap door of a trap is disclosed. The canister includes a closed end and side walls extending from the closed end, wherein the side walls and the closed end together define a cup-shaped body having an open end opposite the closed end. The trap door cap further includes a seal configured to selectively apply a pressure-tight seal around an exterior surface of the trap at a longitudinal location of the trap inward of the trap door and a pressure-tight connection between the seal and the open end of the cup-shaped body, wherein the side walls, the closed end, the seal, and the pressure-tight connection together form a pressure-tight inner volume within the canister.

Packer for use when repairing underground pipe systems, where said packer comprises a flexible and/or expandable main body portion surrounding a hollow interior, said body portion having an elongated shape defining first and second ends in either end of the main body portion, and where heating means are arranged in the packer for heating the packer or at least the surface of the packer, and means are provided for pressurizing the interior of the packer thereby expanding the packer.

A fire sprinkler system according to one aspect of the present disclosure includes a pipe having a first pipe portion and a second pipe portion. The first pipe portion includes a wall having a first wall thickness, and the second pipe portion includes a wall having a second wall thickness that is greater than the first wall thickness. The fire sprinkler system further includes structure coupled to the pipe and defining a sealed chamber between the structure and at least the first pipe portion, and a sensor for sensing a pressure in the sealed chamber. Example corrosion monitoring devices and methods for monitoring corrosion in pipe systems, including fire sprinkler systems, are also disclosed.

A fire sprinkler system according to one aspect of the present disclosure includes a pipe having a first pipe portion and a second pipe portion. The first pipe portion includes a wall having a first wall thickness, and the second pipe portion includes a wall having a second wall thickness that is greater than the first wall thickness. The fire sprinkler system further includes structure coupled to the pipe and defining a sealed chamber between the structure and at least the first pipe portion, and a sensor for sensing a pressure in the sealed chamber. Example corrosion monitoring devices and methods for monitoring corrosion in pipe systems, including fire sprinkler systems, are also disclosed.

An assembly to plug a leak in a flowline includes a plug configured to plug the leak in the flowline, which includes a circumferential surface and a longitudinal axis. A plug insertion subassembly supports the plug. The plug insertion subassembly can move the plug between the circumferential surface and the longitudinal axis of the flowline. An axial positioning subassembly supports the plug insertion subassembly. The axial positioning subassembly can move the plug insertion subassembly along the longitudinal axis of the flowline. A chain-operated rotational positioning subassembly supports the axial positioning subassembly. The rotational positioning subassembly can be attached to the flowline with the leak. The rotational positioning subassembly is movable and can move the axial positioning subassembly on the circumferential surface of the flowline.