Systems and methods include a system for installing insulation sleeves on pipelines. A portable welding robot is configured to weld a plug base longitudinally along a top edge of a pipeline. The plug base supports plugs configured to engage with holes in both overlapping sides of an insulation sleeve configured to insulate the pipeline. A portable pipeline insulation installation fixture is configured to lift the insulation sleeve and install the insulation sleeve around the pipeline including using electric hoists to lift ends of strands beneath and on either side of the pipeline. Each strand is enclosed in an external tube configured to contact and roll along the insulation sleeve and to rotate relative to the strand. The external tubes are configured to wrap the insulation sleeve around the pipeline.

Disclosed is a water-soluble pipe-plugging device, comprising a circular plugging plate made of a water-soluble material. Several support plates made of a water-soluble material are provided on a side surface of the circular plugging plate. The outer side faces of the support plates are flush with the outer side face of the circular plugging plate. The pipe-plugging device has a simple structure, is convenient to use, has high strength, uniform load under stress, good pressure-bearing capacity and good plugging effects, can ensure the safety of construction with welding during repair and replacement, can thoroughly decompose without needing to be removed so as to avoid pollution and pipe plugging, and is biodegradable so as to avoid environmental pollution.

A device for sealing off a segment of pipe-in-pipe pipeline including an inner pipe and an outer pipe between which an insulating material is interposed, and including a water detector. The device includes: a first plug for closing off the inner pipe, a tubular extension welded to the end of the outer pipe, the free end of the extension extending beyond the first plug and being closed off by a second plug, and a means for fixing the position of the inner pipe and outer pipe, integral with the extension.

A tubular product includes a tubular body made of steel and having a tube wall which includes an opening. The opening is produced by a high-speed stamping process at a stamping speed of more than 4 m/s. The opening is situated in the tube wall in a region thereof which has a tensile strength Rm>800 MPa.

A closure is provided for a pressure vessel or pipelines that can provide quick and easy access to the interior of a pressure vessel or pipeline, and means for a pressure tight seal between the hub and door. The closure can incorporate means for mechanically fastening the door to the hub using an external split clamp ring actuated by a toggle mechanism. A locking mechanism can be provided to safeguard against unintended closure actuation, and provides a layer of redundancy to the holding characteristics of the toggle mechanism. The locking mechanism can be interlocked to a pressure alert system to ensure any differential pressure condition contained within the closure is detected prior to disengaging the locking mechanism and actuating the toggle mechanism.

A method of manufacturing a plug for a pipe system includes cutting a plug from a length of pipe, the length of pipe defining a pipe bore, the pipe bore defining an inner diameter equal to an inner diameter of a main bore of the plug, the plug including a top portion defining a top diameter, a bottom portion defining a bottom diameter, and a web portion joining the top portion and the bottom portion.

A method of sealing a hole in a wall of a hollow structure comprises providing a sealed chamber that is external to the structure and that is in fluid communication with an internal space of the structure via the hole. The structure may be a pipe-in-pipe structure and the internal space may be an annulus between outer and inner pipes. Fluid flows through the hole into or out of the chamber as the pressure and/or composition of fluid in the internal space is adjusted. Then, a plug is spun and friction-welded into the hole. The plug is inserted into the hole from within the chamber.

A plug for a pipeline includes a top portion defining a top bore, the top bore defining a top diameter; a bottom portion defining a bottom bore, the bottom bore defining a bottom diameter; and a web portion joining the top portion and the bottom portion; the top portion, the bottom portion, and the web portion defining a main bore, the main bore defining a longitudinal axis of the plug and defining a circular shape around the longitudinal axis of the plug; the top portion, the bottom portion, and the web portion further defining a substantially circular shape around a transverse axis of the plug that extends through the top portion and the bottom portion and is perpendicular to the longitudinal axis.

Disclosed is a water-soluble pipe-plugging device, comprising a circular plugging plate made of a water-soluble material. Several support plates made of a water-soluble material are provided on a side surface of the circular plugging plate. The outer side faces of the support plates are flush with the outer side face of the circular plugging plate. The pipe-plugging device has a simple structure, is convenient to use, has high strength, uniform load under stress, good pressure-bearing capacity and good plugging effects, can ensure the safety of construction with welding during repair and replacement, can thoroughly decompose without needing to be removed so as to avoid pollution and pipe plugging, and is biodegradable so as to avoid environmental pollution.

An insert device for sealing a conduit, wherein at least one component of the insert device is configured to separate and position at least one wire in the conduit in order to create a space or inner volume for a sealant to be introduced thereinto. The insert device can have a nozzle configured to allow precise injection of the sealant into the inner volume. The insert device can be operated for quick and reliably repeatable sealing of conduits.