Clean room water system commissioning and installation
Clean room water system commissioning and installation
During the construction of the water system, the pipes in each area have been pressure tested according to the system, but it is recommended to close the valves on the entire main line system and all branches for safety. end tube, and at the lowest and highest...
Text label: clean room engineering, clean room installation, water system commissioning and installation
Clean room water system commissioning and installation
During the construction of the water system, the pipes in each area have been pressure tested according to the system, but it is recommended to close the valves on the entire main line system and all branches for safety. end pipe, and adjust the discharge valve and exhaust valve at the lowest and highest points so that impurities will collect at the bottom of the sump; it should be opened slowly when adding water, and the purpose of each system's valve is to prevent impurities from entering the branch with the water flow or The coil of the terminal equipment, the test points are set at the highest and lowest points of the pipe network, so that the system can accurately verify the pressure test; by injecting water into the pipe network, the air in the pipe network must be expelled first, and the pressure must be gradually increased to reach After testing the pressure, the pressure should be stable for 30 minutes, and the pipe network must be checked visually for leakage and deformation, and the pressure drop should not be greater than 0.05MPa.
Depending on the working medium used in the pipeline, water or air can be used as the test medium, if conditions permit, it is better to use water as the test medium, which is convenient for leak detection and safer during operation, but the actual situation is more It is complex and sometimes not suitable for water as the test medium, so it is necessary to use air as the pressure test medium. Compared with the water pressure test, no water is required in the air pressure test, and there is no need to install a water source or install a water supply pipe and establish a drainage facility; the fan coil system in winter is subjected to a water pressure test, and the water in the fan coil will not be lost after the test, which will cause This phenomenon can be prevented by using the air pressure test to make the coil freeze; because it is difficult to release the pressure from the air pressure test, in order to ensure safety, the design pressure of the pipeline exceeds 0.6MPa, and the air pressure test is not allowed. To ensure safety, a pre-test must be performed before the official air pressure test. The purpose of the pressure test is mainly to check the pressure resistance and tightness of the pipeline and its fittings to ensure that the system does not rupture or leak under normal working conditions; whether it is the internal stress of the pipeline or the stress of the weld, it is only related to the test pressure and The dimensions of the pipes and welds are related, not the stress of the material. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and clean workshops, with professional technology, rich experience and affordable prices.
During the air pressure test, a restricted area should be demarcated, and unrelated personnel should not be allowed to enter; the piping system from the air compressor outlet to the test pressure cannot work, and the pressure gauge, safety valve and regulator should be checked regularly to maintain sensitivity and effectiveness ; It is found that the indicated values u200bu200bof the pressure gauge, oil pressure gauge, temperature gauge and ammeter suddenly exceed the regulations or the indication is abnormal, and it is found that water leakage, air leakage, oil leakage or sudden stop of the coolant and the safety valve does not stop deflating, if the sound of the air compressor If it is abnormal and cannot be adjusted, it must be stopped immediately for maintenance; the pressure test of the pipeline should use a pressure gauge that has passed the inspection, and the pressure should be gradually increased during the operation and the pressure can be verified. on welding ports and wire ports; maintenance work should be carried out after depressurization.
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