Pe Pipe Testing Procedure In Greece
When water is utilized in these exams, corrosion of the metal throughout and after testing is a concern. This concern is because of the fact that when steel is in touch with oxygen and water, corrosion tends to start.
It is also essential to refrain from testing underneath wet situations, fogging or wetting of the trench. eight- In order to estimate the amount of water required, the quantity of the pipeline under take a look at should be calculated.
Therefore, it is strongly recommended that cool water be used during testing and avoid direct sunlight publicity to the tube. 2- Hydrostatic strain take a look at, based on the view of the supervisor and the project advisor, is healthier to calculate primarily based on the pressure (lower than the nominal strain of the pipe) to stop the fatigue of the pipe. When the take a look at stress is equal to or lower than the design stress of the system, the entire test duration is about 72hr or less. 3- Tools similar to strain pumps and take a look at instruments should be firmly fixed on their premises.
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2- Pipes, fittings and gear of the road have to be controlled earlier than testing and if there are imperfections, then the defect have to be corrected. Ensuring the correctness of the work, the suitability of the pipe, the valves, the equipment and the dimensions of the equipment used, and thus the necessary pressure to face up to all parts of the line, towards the design strain and non-leakage. No cylinder is to be marked with the licensed take a look at agency's number until the cylinder has passed all visual inspection and hydrostatic take a look at necessities. No cylinder is to be marked with a licensed test company quantity by any other individual or company other than the personnel of the licensed take a look at company. Hydrostatic testing for various kinds of cylinders is required at completely different intervals.
10- To carry out the check, you must use clean water to fill the system. This water should be smooth, odorless and freed from any suspended matter seen to the naked eye.
Whenever the temperature of the pipe is greater than 20C at the time of utilizing the system or through the test, the stress discount coefficient must be used in accordance with the next desk extracted from the 14563ISIRI or 13761ISO standard. 4- If the temperature of the tube exceeds 40C2, the take a look at should be avoided. Due to the excessive functionality of polyethylene pipes in absorbing UV rays, the temperature of the tube is rapidly rising as a result of exposure to sunlight even at low ambient temperatures.
However, when Zerust® AxxaVis™ HST-10 is added to water, it will forestall corrosion throughout testing, moist storage and after testing. The design strain of a system in which polyethylene water pipes are used is at the weakest point of 10 atm and the water temperature and the tube is 20C.