The present disclosure provides a sealing apparatus for use in a hypertube, which includes a first tube, a second tube having one end connected to an end of the first tube, and a gasket including a seal made of a fiber structure formed with a space that is filled with a sealing fluid, wherein the gasket is configured to seal a space between the first tube and the second tube.

A method of testing for leaks within substantially the entirety of a piping system of a building or a section thereof. The method comprises isolation of a main of the piping system and removal of the building fixtures. Optionally, a line trace and/or a dye test may be implemented. The method further comprises purging the piping system to at least partially reduce or eliminate entrapped air. The method further comprises sealing the plumbing outlets of the piping system and filling the piping system up to a predetermined elevation above a highest fitting connection or up to the highest serviceable point of the system. The method further comprises inspecting the piping system for leaks after a predetermined period of time, which may be anywhere from immediately after filling the piping system to about twenty minutes thereafter.

A method for testing a device under test includes the steps of applying a vacuum to an interior of the device under test. Pressurizing a predetermined portion on an exterior of the device under test with helium to detect a potential pressure leak. Utilizing a large pressure differential during the exterior testing of the device under test as compared to the vacuum applied during to the interior of the device under test. Detecting a potential leak in the device under test while leaving no residual helium in a wetted area of the device under test.

A method is described to detect a fluid leakage in a joint area between two pipe sections (10, 12) that are joined together to provide a continuous fluid-carrying pipeline, where a casing-formed joint element (20) with an inwardly protruding flange part (28) is inserted between the pipe sections (10, 12), the ends of which lie against sealing elements (27a, 27b) at the oppositely directed flange surfaces, and a coupling body (60, 62) on each side of the joint element (20) forms an engagement with respective pipe circumference surfaces (17, 19) and is made to squeeze the pipe ends against each other via the joint element (20). The method is characterised in that a second sealing element (31a, 31b) that seals between the joint element (20), and the pipe section surfaces (17, 19) is set up at the pipe ends, and any fluid leakages past the two sealing systems (27, 31) are monitored in a fluid channel system (30, 32), in connection to the joint element (20), between the sealing systems (27, 31) and which is set up by a radially formed ring-formed hollow space (32a, 32b), outside respective sealing elements (27a, 27b) and defined between respective, oppositely directed flange surfaces (28) and the ends of the pipe sections (10, 12) where the hollow space is fluid connected with another channel system (30) via the joint element and connected to a pressure sensor (P, 52) that registers the pressure in the fluid channel system for alarms and the initiation of relevant actions. A device to carry out the method is also described.

A method of inspecting a pipe joint for use in a subsea pipeline and a method of manufacturing a pipe joint for use in a subsea pipeline employing said inspection method are disclosed, the inspection method comprising the steps of: receiving a pipe joint; measuring the ovality of the pipe joint to obtain ovality data; determining that the ovality data does not exceed a predetermined maximum pipe joint ovality value; and carrying out external pressure collapse tests on a ring cut from one end of the received pipe joint, resulting in data representative of the hydrostatic collapse pressure of said pipe joint for use in confirming that the pipe joint is suitable for its intended use.

A containment sump has a primary container and a secondary container which extends only partway up the outer wall of the primary container. This “low-rise” secondary container, in certain embodiments, cooperates with the primary container to create a hermetically sealed interstitial space encompassing the bottom of the primary container, including the lower portion of the upright containment wall and the container bottom. In alternative embodiments, the secondary container is a subassembly forming an interstitial space and joined as a subassembly to the primary container. More particularly, the upper end of the interstitial space may be below pipe or other conduit penetrations through the sidewall of the primary container. At the same time, any leak which may develop over the service life of the containment sump would be contained and detected within the bottom of the primary and/or secondary containers. Therefore, the present system combines the low cost and high reliability associated with single-wall penetrations through containment sump walls, while also offering the high level of environmental protection associated with double-wall spill containment.

An on-line sealing detecting device, which is set on a butting surface of two parts, and includes: a seal ring installed in the butting surface of two parts, and a circumferential chamber set in this seal ring ; an inlet and outlet unit connected with the inner of the chamber, and one detection unit set on this inlet and outlet unit. This detection unit is connected with a processor through electric connection and is used for detecting the gas pressure value and/or gas concentration value in the inlet and outlet unit, and for sending the gas pressure value and/or gas concentration value to the processor. An on-line sealing detecting method realizing an on-line detection of part sealing, and detecting each operation position of multi-section-type seal chamber processing equipment at the same time effectively improves the sealing detection efficiency of multi-section-type seal chamber processing equipment.

A method of inspecting a pipe joint for use in a subsea pipeline and a method of manufacturing a pipe joint for use in a subsea pipeline employing said inspection method are disclosed, the inspection method comprising the steps of: receiving a pipe joint; measuring the ovality of the pipe joint to obtain ovality data; determining that the ovality data does not exceed a predetermined maximum pipe joint ovality value; and carrying out external pressure collapse tests on a ring cut from one end of the received pipe joint, resulting in data representative of the hydrostatic collapse pressure of said pipe joint for use in confirming that the pipe joint is suitable for its intended use.

Described herein is an ammonia compound indicator comprising an adhesive and a chemochromic compound disposed therein. Also described are methods of making the aforedescribed elements and methods for indicating the presence of ammonia.

A system and method to inspect and monitor stress, strain, leakage, corrosion and disjointing of rigid metallic and non-metallic connector fittings used to join sections of non-metallic flexible reinforced thermoplastic pipe (RTP), as well as inspecting and monitoring the structural health of RTP in the area of connections with casement shields concentrically mounted on and adhered to the outer surface of the RTP at or adjacent to connection with a rigid connector fitting, monitoring sensors installed in the casement shields, a management system for receiving, processing and transmitting information gathered from the sensors via SCADA or other computerized means for monitoring and regulating strain impact, determining stress level and direction, potential leaks and temperature spikes at connector fitting areas, and a mechanism for acoustical detection or simulation, with a computer system for receiving, processing and transmitting information gathered from acoustical micro packs on the casement shields.