<h2 class = 'uawtitle'>The Use Of Hydro Testing</h2><br />
<div style='font-style:italic;' class='uawbyline'>by Nancy Morgan</div><br /><br />
<div class='uawarticle'>Pipelines and other similar units have to be occasionally tested to see if there are existing or possible leaks and if their performance is still adequate. <a href="www.eldenindustrial.com/industries/industrial/">Hydro testing</a> is usually required by authorities after different repairs, but it has to be performed in regular intervals just to check if everything is working properly. Similar testing is used for pressure vessels and other pressure units.<br />
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For performing this procedure, the system has to be shut down, and none of these methods can be used when the system is running. It is a nondestructive way of finding out if everything is in order, and if it is working properly. Testing is usually required after repairs or for issuing various operating licenses. It is performed to find possible leaks and other failures.<br />
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When it comes to different pipelines, the system should be first totally emptied, and all natural gas, oil or other substances removed. After that, the pipeline should be mechanically cleaned and vented. The whole system is then filled with water, and this process removes all the remains of air held within. After that, the pressure that exceeds the designed pressure limit of this pipeline is applied.<br />
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I average, the pressure used is fifty percent higher than the pressure thee pipes are designed for. This is to determine the system strength, as well to make it easier to find leaks and other damages. The pressure should remain until this system is visually checked by personnel, and it is also possible to use fluorescent dyes to find leaks and their origins, as well as cracks.<br />
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After the process is finished, the pipes should be cleaned and dried before you can refill them with the medium they were designed to carry. The person applying the test has to take into consideration the differences between the fluids and how their different properties may affect the entire system.<br />
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Small vessels, cylinders and similar equipment and units are tested using different methods. There are three main types that are used, and some are more applicable for particular purposes. Direct expansion method is normally used for testing the pressure vessels. In this process, the vessel should be filled with water, and then the pressure is applied, for designated amount of time. Resulting expelled water is measured for testing results.<br />
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Water jacket method is called so because the unit, after being filled with water, should be loaded into a sealed test jacket. Once the vessel is in this sealed chamber, it's put under pressure, and this pressure forces water out from the chamber, into the glass tube. The amount of water that gets expelled is the measure of the total expansion.<br />
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When the pressure is removed, the vessel shrinks to its normal size. Sometimes it doesn't shrink totally, but only partially. If it doesn't shrink at all, it needs a service. Shrinking percentage is used to determine if any kind of service is needed. When this value is not important or required by the authorities, the pressure method might be enough to check the unit for cracks and leaks, without measuring this expelled water.<br />
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<div class='uawlinks'>You can find a detailed list of the benefits you get when you use <a href="http://www.eldenindustrial.com/industries/industrial">hydro testing</a> services at http://www.eldenindustrial.com/industries/industrial right now.</div><br />
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