Air duct inspection and acceptance of purification project
Air duct inspection and acceptance of purification project
The bending angle of the circular elbow of the purification project and the manufacturing deviation of the angle between the circular tee, the four-way branch pipe and the main pipe should not be greater than 3°. Straight and straight, the arc should be uniform, and the two ends should be parallel; the air duct has no obvious distortion and warping angle, and the surface...
Text label: air duct acceptance of purification engineering, air duct inspection of purification engineering, purification engineering manufacturer
Air duct inspection and acceptance of purification project
The bending angle of the circular elbow of the purification project and the manufacturing deviation of the angle between the circular tee, the four-way branch pipe and the main pipe should not be greater than 3°. Straight and straight, the arc should be uniform, and the two ends should be parallel; the air duct should have no obvious distortion and warping angle, the surface should be flat, and the unevenness should not be greater than 10mm; the allowable deviation of the outer diameter or outer length of the air duct, when it is less than or equal to 300mm, is 2mm , when it is greater than 300mm, it is 3mm, the allowable deviation of the flatness of the nozzle is 2mm, the difference between the two diagonal lengths of the rectangular air duct should not be greater than 3mm, and the difference between the two diameters of any orthogonal circular flange should not be greater than 2mm. ; The welding seam of the welded air duct should be smooth, and there should be no cracks, penetrating slag inclusions, pores and other defects. After welding, the deformation of the plate should be corrected, and the welding slag and spatter should be cleaned up; 10% of the production quantity shall be randomly checked, and shall not be less than 5 pieces, and 20% of the purification air-conditioning project shall be randomly checked according to the production quantity, and shall not be less than 5 pieces.
The welding seam of the air duct flange should be well fused, full, without false welding and holes. The allowable deviation of the flange flatness is 2mm. The screw holes of the same specification flanges processed in the same batch should be consistent and have mutual Replaceability; when the air duct and the flange are connected by riveting, the riveting should be firm, and there should be no riveting and leakage. There should be no cracks and holes at the four corners; when the air duct and the flange are connected by welding, the end face of the air duct should not be higher than the plane of the flange interface. The air duct of the dust removal system should be fully welded on the inside and intermittently welded on the outside. The distance between the end face and the plane of the flange interface should not be less than 5mm; when the air duct and the flange are fixedly connected by electric welding, the welding points should be well integrated, the distance should not be greater than 100mm, the flange and the air duct should be close to each other, and there should be no penetration. gaps or holes. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for purification projects and purification workshops.
The interface accessories of thin steel plate flange rectangular air ducts that cannot be flanged to the air duct should be accurate in size, regular in shape, and tight at the interface; rectangular air ducts connected by C and S-shaped inserts should not have side lengths. It should be larger than 630mm, the width of the insert and the socket processed by the air duct should match the same, the allowable deviation is 2mm, the connection should be flat and tight, and the overwhelming length of both ends of the insert should not be less than 20mm; The height of the connected rectangular air ducts should be greater than or equal to the width of the angle steel flanges of the air ducts of the same specification. The heights of the vertical bites and the edge-wrapped vertical bites of the same specifications of the air ducts should be the same, and the corners should be inclined and straight. The allowable deviation is 5/1000. The spacing of the rivets for the bite connection should not be greater than 150mm, and the interval should be uniform. The riveting at the four corners of the vertical bite should be tight and without holes; When it is larger than 1250mm, it should be reinforced with a reinforced frame. The single bite seam of the metal air duct of the high-pressure system should also be strengthened or reinforced to prevent the bite seam from bursting. 20% of the purifying air-conditioning systems shall be randomly checked, and shall not be less than 5 pieces.
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