A pipeline has a fitting with a wedge-shaped plug pressed into a wedge-shaped fitting recess by a retaining ring to block flow through the fitting for pressure testing. The plug has an extractor plate fastened to the plug through a center of the retaining ring so the retaining ring can rotate relative to the plug and extractor plate. But the extractor plate is a predetermined maximum distance from the plug and is larger than the center opening of the retaining ring to captivate the retaining ring between the plug and extractor plate. That limits the retaining ring motion along the port's axis. Threading engagement between the retaining ring and port allow the retaining ring to push the plug into the fitting in a first rotation direction while rotation in the opposite direction allows the retaining ring to push the extractor plate and the connected plug out of the fitting.

A drainpipe test plug for plugging a drainpipe via an opening formed therein includes a plug seal that includes a planar front surface which faces upward in the drainpipe whenever the drainpipe test plug is in a plugging position and a peripheral annular rim. The plug seal can include a plurality of holes or a continuous channel formed into the surface of the planar front surface, or a plurality of holes or a continuous channel formed into the surface of the peripheral annular rim, or both. The plug seal holes or channels impart a degree of flexibility to a peripheral area of the plug seal to facilitate the insertion and removal of the drainpipe test plug from the drainpipe. In addition, the holes or channel in the planar front surface provide additional sealing force against the interior of the drainpipe whenever the drainpipe test plug is in the plugging position.

Techniques for implementing a system including a pipe segment and a test head. The test head includes a shell that defines an annulus cavity to be used to interface with an annulus of the pipe segment, in which the shell includes a bore insert having a male taper to be inserted into a pipe bore of the pipe segment, a testing port that extends through the shell and fluidly coupled to the annulus cavity, and an internal clamp assembly including clamp segments having a female taper that slidably interface with the male taper of the bore insert, in which an outer surface diameter of the clamp segments is controlled by position of the clamp segments on the bore insert to facilitate selectively securing and sealing an open end of the pipe segment in the test head to enable integrity of the tubing to be tested.

There is provided a sealing detection method for a sealing structure, comprising the following steps: S1, attaching a thin film on a gasket to seal an opening; S2, disposing a sealing ring directly below the base to seal a lower opening of the mounting through hole; S3, providing a vent hole on sealing ring through which the sealing ring communicates with a gas source with a gas pressure sensor; S4, starting to supply or pump gas to form a positive pressure or a negative pressure region between the sealing ring and the base; S5, maintaining the air pressure state for a certain time, during which the gas pressure sensor performs real-time detection of gas flow; S6, comparing detected gas flow with qualified threshold range; S7, sorting products with the sealing structure according to detection results; S8, peeling off the thin film and completing the detection.

A gas-tight plug is attachable by pressing it against an opening portion of a hollow component, the gas-tight plug being inserted into the opening portion using the force of pressing to be automatically aligned so that if the positions of a plurality of opening portions vary within an allowable tolerance, the axial directions of all the opening portions and the axial directions of the respective gas-tight plugs are automatically caused to coincide. A gas-tight plug includes an end portion, a contact part of a base portion end of the gas-tight plug coming into contact with a base of the pressing mechanism has a circular flat surface coaxial with the end portion, and the circular flat surface has a diameter more than 0.12 times and less than 0.2 times a total length of the gas-tight plug.

A weld test plug has a flange; an actuator rod mounted to the flange, the actuator rod having: a part expander; an annular seal; and an axial stop; in which the actuator rod is connected to, during use, cause the part expander to actuate: the axial stop to move in a radially outward direction relative to the actuator rod; and the annular seal to radially expand and abut the axial stop. A method includes inserting an actuator rod into an open end of a vessel, the actuator rod carrying an annular seal, and an axial stop; sealing the open end of the vessel around the actuator rod; operating the actuator rod to actuate: the axial stop to move in a radially outward direction relative to the actuator rod; and the annular seal to radially expand to abut the axial stop and seal against an inner circumferential surface of the vessel.

Techniques for implementing and operating a system that includes a pipe segment, which has tubing that defines a bore and a fluid conduit implemented in an annulus of the tubing, and a test head. The test head includes a shell, which defines an annulus cavity, and an inflatable bladder implemented in the annulus cavity, in which the system maintains the inflatable securing bladder in a less inflated state while pipe segment tubing is not present in the annulus cavity and increases inflation of the inflatable bladder to a more inflated state when the tubing is present in the annulus cavity to facilitate securing and sealing an open end of the pipe segment in the test head to enable integrity of the tubing to be tested at least in part by flowing a test fluid into the annulus of the tubing via a testing port on the shell.

Techniques for implementing and operating a system that includes a pipe segment, which has tubing that defines a bore and a fluid conduit implemented in an annulus of the tubing, and a test head. The test head includes a shell, which defines an annulus cavity, and an inflatable bladder implemented in the annulus cavity, in which the system maintains the inflatable securing bladder in a less inflated state while pipe segment tubing is not present in the annulus cavity and increases inflation of the inflatable bladder to a more inflated state when the tubing is present in the annulus cavity to facilitate securing and sealing an open end of the pipe segment in the test head to enable integrity of the tubing to be tested at least in part by flowing a test fluid into the annulus of the tubing via a testing port on the shell.

A leak detection system includes a testing interface, which includes a rotation holder configured to retain and rotate a package. The testing interface includes a plunger apparatus configured to actuate a plunger to apply a pressure to the package before and/or during the package being inspected using a high voltage leak detection (HVLD) apparatus. The testing interface also includes a controller configured to operate and coordinate the operation of the testing interface with operation of the HVLD apparatus.

An apparatus for hydrostatic testing of items containing flanged openings and which items require periodic pressure testing, such as flanged pipe sections, flanged pipelines, flanged hose assemblies, as well as other flanged equipment requiring periodic pressure testing. The apparatus is clamp-like and is comprised of multiple circular plates that are designed and arranged to hold a blind flange against the flange of the item to be tested. One of the circular plates contains a circular cavity into which the blind flange can be stored when the apparatus is not in use.