Ductile pipe standards

by:XEX     2020-12-30
Ductile pipe criteria air tightness monitoring is essential in the process of ductile iron pipe production and use of process, is to guarantee the product quality, production safety of the important processes of gas leak detection including toxic gas leak detection, combustible gas leak detection and air tightness test. Most of the former two can, through the method of chemical sensors to detect, usually in the process of component or system used for testing. If you have appropriate sensors, the method is relatively simple. This article introduces the air tightness test, general is in the process of component or system manufacturing, usually requires quantitative detection, and requirements quickly and in large quantities in the production of the field. Ductile pipe concrete wall use 180 degrees. Air tightness test need turns the soil in the cast iron pipe, if there is leakage, again need to clean up soil, broken concrete such as tedious work, such inevitable to affect the progress, in the common methods of project implementation, we usually adopt the following ways for ductile iron pipes air tightness check: method of commonly used methods of air tightness test has bubbles, daub method, chemical tracer gas leak detection method, pressure variation method, flow method, ultrasonic method and so on. More than the traditional method to measure the leakage by the methods of air bubbles and apply. Bubble is the artifacts into the water, filling the compressed air, and then in a certain period of time to collect bubbles to measure leakage from leaking out. Daub method is a certain pressure is filled in the internal surface of workpiece with soap and water kind of easy to produce bubbles in the liquid, observe bubble situation to determine the size of the leakage. The operation is simple, the two methods can directly observe the region and the leakage situation of leakage, but because I don't know in advance the workpiece leak location and several leak, difficult to collect all bubbles, affect the accuracy of the measurement; Second, in big volume, heavy, the outside surface of complex parts, air bubble at the bottom of the attached to the parts and fold and less prone to observe; After the test need to cleaning the dry processing of artifacts, unable to realize automatic and quantitative leak. So the two methods in meet the demand of high precision, high efficiency production ragged. With the rapid development of computer, electronics, sensing technology, the development of leak detection technology will usher in a new development opportunity. Air tightness detection technology in the future will be to the further development of high precision, high efficiency, intelligent direction. ( The original from: http://www. xexfoundry。 com/)
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