Acceptance requirements for air supply and exhaust and dust removal systems in clean workshops
Acceptance requirements for air supply and exhaust and dust removal systems in clean workshops
The installation of various air duct components and operating mechanisms should be able to ensure their normal use and easy operation; for the installation of the oblique plate air valve, the valve plate must be pulled upwards. It should be in the direction of airflow; check valve, automatic exhaust valve...
Text label: air supply and exhaust system for clean room, acceptance of clean room, dust removal system for clean room
Acceptance requirements for air supply and exhaust and dust removal system in clean room
The installation of various air duct components and operating mechanisms should be able to ensure their normal use and easy operation; for the installation of the oblique plate air valve, the valve plate must be pulled upwards. It should be in the direction of the airflow; the installation direction of the check valve and the automatic exhaust valve should be correct; the tightness inspection of the air duct of the low-pressure system should adopt random inspection, and the sampling inspection rate should be 5%, and there should be no less than 1 system. On the premise of the guarantee, the light leakage method is used for detection. If the test fails, the air leakage test shall be carried out according to the specified sampling rate; for the tightness inspection of the air duct of the medium pressure system, after the light leakage method is qualified, the system air leakage test shall be sampled. , the sampling rate is 20%, and there should be no less than 1 system; the tightness inspection of the high-voltage system air ducts is to carry out the air leakage test for all of them; the sampling systems that are inspected for the tightness of the system air ducts should be all qualified and deemed to have passed. If there is any unqualified, the sampling inspection shall be doubled until all of them are qualified.
For manual airtight valve installation, the direction of the arrow marked on the valve must be consistent with the direction of the shock wave; before the installation of the air duct, the internal and external debris should be removed, and cleaning and protection work should be done well; the installation position, elevation and direction of the air duct should be In line with the design requirements, the configuration of the on-site air duct interface shall not reduce its effective section; the bolts connecting the flanges should be tightened evenly, and the nuts should be on the same side; the connection of the air duct interface should be tight and firm, and the gaskets of the air duct flange The material should meet the requirements of the system function, the thickness should not be less than 3mm, the gasket should not protrude into the pipe, nor should it protrude out of the flange; the installation of the flexible short pipe should be tight and moist, without obvious distortion; stretchable metal or non-metallic The length of the flexible air duct should not exceed 2m, and should not be bent or slumped; the contact between the stainless steel plate and aluminum plate air duct and the carbon steel bracket should be isolated or anti-corrosion insulation measures. The connection of the installation air duct without the flanged air duct should be complete and free of defects, the surface should be flat, and there should be no obvious distortion; the surrounding gaps of the socket-type air duct should be consistent, without obvious bending or folds, and the sealant applied inside should be complete , The outer adhesive sealing tape should be firmly pasted, complete and free of defects; the connection of the air duct in the form of a thin steel plate flange
, the interval between elastic inserts, spring clips or fastening bolts should not be greater than 150mm, and the distribution should be uniform without loosening; the rectangular air duct connected by the inserts should be flat and without obvious bending. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for dust-free workshops and purification workshops.
The air duct, static pressure box and other components must be wiped clean to avoid oil pollution and floating. When the construction is stopped or completed, the port should be sealed; the flange gasket should be dust-free, not easy to age and have A certain strength and elasticity material, the thickness is 5-8mm, latex sponge shall not be used, the flange gasket shall be spliced u200bu200bas little as possible, and straight seam butt connection shall not be allowed, and it is strictly forbidden to apply paint on the surface of the pad; air duct and dust-free pharmaceutical cleanroom ceiling, The joints of maintenance structures such as partition walls should be tight; the radius of curvature of the vacuum system elbow should not be less than 4 times the pipe diameter, the inner wall surface of the elbow should be smooth, and no corrugated elbow should be used; The included angle should not be greater than 45°, and two inclined tees should be used for the production of the four-way; the air outlet should be cleaned before installation, and the joint between the frame and the building ceiling or wall should be added with gasket or sealant. There should be air leakage; the air supply outlet with high-efficiency filter should adopt a boom whose height can be adjusted separately.
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