A method for leak testing includes a leak testing step and a reference leak step. In the leak testing step, a hollow work 20 as a test object is encapsulated in a work capsule 11. A test pressure is supplied to the work capsule 11 through a path 2a connected to the work capsule. A variation of pressure inside the work capsule 11 is detected in a condition in which the path 2a is shut-off, and a judgment is made whether a leakage through the work is generated based on the detected output. In the reference leak step, a reference leak device 30 having a known pinhole 31a is mounted on a work 20′ for reference leakage that is same as the work 20 as the test object. The work 20′ for reference leakage is encapsulated in the work capsule 11. The test pressure is supplied to the work capsule 11 via the path 2a, and a reference leakage is generated in the work 20′ for reference leakage via the reference leak device 30 in a condition in which the path 2a is shut-off. A variation of pressure inside the work capsule 11 accompanying the reference leakage is detected.

A system and method of predicting impending failure of a pressure vessel include a pressure vessel, a fluid source, a line coupled to the pressure vessel and to the fluid source, an apparatus, a sensor and a controller. The apparatus includes a conduit and a containment structure. The containment structure includes a cavity separated from an interior of the conduit by a portion of a conduit wall of the conduit. The sensor is configured to determine a value of a physical property in the cavity. The controller is in signal communication with the sensor and configured to detect a change in the value. The method includes determining a first value of a physical property in the cavity, experiencing a failure of the conduit wall, determining a second value of the physical property in the cavity, and detecting a difference between the first and second values.

Example computer systems, computer apparatuses, computer methods, and computer program products are disclosed for testing an ultrasonic gas leak detection device. An example method includes determining a rotary position of a rotary selector of the handheld ultrasonic testing device. The method further includes determining whether the rotary position of the rotary selector corresponds to a first testing mode for testing the ultrasonic gas leak detection device or a second testing mode for testing the ultrasonic gas leak detection device. The method further includes generating a first ultrasonic signal for testing the ultrasonic gas leak detection device in response to determining that the rotary position of the rotary selector corresponds to the first testing mode. The method further includes generating a second ultrasonic signal for testing the ultrasonic gas leak detection device in response to determining that the rotary position of the rotary selector corresponds to the second testing mode.

This disclosure relates to fluid conduit that incorporates sensors printed on an exterior wall of the fluid conduit configured to sense an operating parameter of the fluid conduit. A two-way communication device communicatively connected to the printed electronic material is configured to wirelessly transmit the operating parameter to a mobile device.

This disclosure relates to fluid conduit that incorporates sensors printed on an exterior wall of the fluid conduit configured to sense an operating parameter of the fluid conduit. A two-way communication device communicatively connected to the printed electronic material is configured to wirelessly transmit the operating parameter to a mobile device.

An apparatus for the continuous monitoring of a pipeline or a pipeline network carrying flowing media that can not only detect the presence of a leak but also locate the source of the leak through the use of rarefaction wave detection and methods of using the same is disclosed within. The apparatus and method are specifically configured to locate the leak source within less than 36 inches using a calibration means and a noise cancellation means.

A hydrocarbon dispensation line pressure sensor adapted to work without requirement of a separate closed valve. The system closes the dispensation line upstream via an isolation valve. The pressure can be sensed from the dispensation line through the valve to provide dispensation line pressure. A channel in fluid communication with the dispensation line may be provided to allow pressure measurement apart from the main dispensation line. Further, a method for measuring the pressure drop profile of a dispensation line and various methods to determine the pressure loss due to leaks in dispensation line.

Systems and methodologies are disclosed to detect a leak in a duct system or other closed loop systems. The system and methodologies use a light source to detect a leak in a duct system, e.g., the ductwork of a HVAC/R system.

A test device and a calibration method thereof are disclosed. The test device for calibrating a test equipment, which is used to test a waterproof level of an electronic apparatus, comprises: at least two plates stacked together, wherein each plate has at least one hole, and the holes in different adjacent plates are displaced with each other.

A test device and a calibration method thereof are disclosed. The test device for calibrating a test equipment, which is used to test a waterproof level of an electronic apparatus, comprises: two plates, which are pressed against each other with pressure, wherein minor gap between the two plates are used as water leakage path.