A method and system for detecting small leaks in a plumbing system is disclosed. A temperature sensor coupled to the water in the plumbing system is used to determine if there is a leak. During times of inactivity for fixtures in the plumbing systems, a flow sensor might measure usage of water that would indicate a leak. For very small leaks, the flow is below a minimum measurable flow of the flow sensor. Embodiments of the invention measure temperature of water within a pipe coupled to the plumbing system. Temperature will generally decay in a particular predicable way when there is flow as the temperature of water upon entry to the building is lower than the air temperature within the building. Signal processing, machine learning and/or statistical approaches are used to analyze the temperature and optionally flow and/or pressure over time to determine when a leak is likely.

A method that consists of the following steps: depressuring and isolating the annular space; recording a first pressure and temperature prevailing in the annular space; injecting a given amount of a measuring gas into the annular space and isolating the annular space, the annular space remaining under negative pressure after the injection and isolation; measuring the given amount of measuring gas; recording a second pressure in the annular space after the isolation of the annular space; and determining the free volume of the annular space on the basis of the first pressure, the second pressure, the temperature, and the measurement of the given amount of measuring gas.

A method for detecting a leak in a line system having a distribution line where the first end can be closed by a first valve and at the second end of which at least one consumer is arranged, a pressure sensor by means of which the pressure in the distribution line can be ascertained, and at least one second valve wherein at least one second valve is arranged between the pressure sensor and at least one of the consumers is disclosed. The method contains the steps of a) closing the first valve, b) ascertaining a first pressure reduction rate (PR1); c) closing the at least one second valve; d) ascertaining a second pressure reduction rate (PR2); and e) determining the region of the leak on the basis of the ascertained pressure reduction rates (PR1, PR2).

The present application provides a gas density relay with sealing performance self-checking function and an implementation method therefor. The gas density relay includes a gas density relay body, a sealing performance detector and an intelligent control unit; the sealing performance detector is communicated with a gas path of the gas density relay body or a sealed cavity in the gas density relay body to obtain gas leakage information of the gas density relay body; the intelligent control unit is connected with the sealing performance detector, receives and/or calculates the data and/or information monitored by the sealing performance detector, and performs diagnosis to obtain the current sealing performance of the gas density relay body; or, the intelligent control unit uploads the received data and/or information to a background, and the background performs diagnosis to obtain the current sealing performance of the gas density relay body. The gas density relay is used to monitor the gas density of gas insulated or arc extinguishing electrical equipment, and the gas leakage performance of the gas density relay can also be monitored on line, which reduces operation and maintenance costs and ensures safe operation of a power grid.

The invention relates to a method for leakage detection on an object flown through by a medium, in particular a pipe or a pipeline. According to the invention, a pattern is identified in the determined values for the change of the flow rate and the pressure of the medium and for a temperature change, and a probability for the presence of a leak is determined based on the identified pattern and due to self-learning systems.

A system for detection or prediction of a leak in a pipe system includes a data source with characteristics of a pipe system, a prediction module, and an interface coupled between the data source and the prediction module, wherein the prediction module includes at least one processor and is configured via executable instructions to receive the characteristics of the pipe system via the interface, evaluate the characteristics of the pipe system utilizing markers, each marker representing a physical condition of the pipe system, and identify or predict a leak in the pipe system based on a specific combination of markers.

An insert half for sealing around a cable, pipe or wire. The half includes a body with a first end and a second end, a first side intended to be arranged towards a corresponding first side of a substantially identical half, forming an insert block, and a groove arranged in the first side and extending between the first and second end along an axis A. The body includes a fluid permeable layer extending in a plane transverse to the longitudinal direction of the axis A. An insert block may include two halves. A sealing system may include plural blocks.

An insert half for sealing around a cable, pipe or wire. The half includes a body with a first end and a second end, a first side intended to be arranged towards a corresponding first side of a substantially identical half, forming an insert block, and a groove arranged in the first side and extending between the first and second end along an axis A. The body includes a fluid permeable layer extending in a plane transverse to the longitudinal direction of the axis A. An insert block may include two halves. A sealing system may include plural blocks.

An assembly is provided for an engine. This engine assembly includes a fuel system, a sensor and a processing system. The fuel system includes a fuel source, an engine component and a fuel circuit configured to direct fuel from the fuel source to the engine component. The sensor is configured to provide sensor data indicative of a measured parameter of the fuel directed through the fuel circuit from the fuel source to the engine component. The processing system is configured to identify a fuel leak in the fuel system based on the sensor data. The fuel leak is identified when a measured value corresponding to the measured parameter of the fuel is less than an expected value corresponding to an expected parameter for the fuel directed through the fuel circuit from the fuel source to the engine component.

A petroleum pipeline safety system for preventing contamination of an environmentally sensitive area close to a pipeline is provided. The system includes a first portion of the pipeline including an upstream portion of the pipeline supplying a flow of fluid material and a flow restriction downstream of the first portion of the pipeline. The system further includes a second portion of the pipeline downstream of the flow restriction, receiving the flow of fluid material from the first portion and conveying the flow of fluid material through the environmentally sensitive area to a downstream portion of the pipeline. The flow restriction is configured to create a lower pipeline internal pressure within the second portion as compared to a pipeline internal pressure within the first portion. The system further includes a third portion of the pipeline downstream of the environmentally sensitive area and including the downstream portion of the pipeline.