1.1. Construction Conditions of Clean Engineering
1.1.1. Wood materials and other materials that do not meet the requirements of clean standards are not used in clean rooms of clean engineering.
1.1.2. Clean engineering materials are stored in a clean and dry environment with enclosure facilities.
1.1.3. The thickness, specifications, dimensions and quality of the color steel plate for clean engineering must meet the design requirements or contract requirements, and the factory inspection report is provided. The production of the color steel plate must be carried out in accordance with the secondly designed jigsaw and the list of sizes and quantities. In the production process, according to the drawing number, the length of the ceiling plate should not exceed 5000 feet.
1.1.4 Clean engineering auxiliary materials, such as hardware standard parts, must meet the design requirements or contract requirements and have factory certificates.
1.1.5. The material and specification of the section steel for clean Engineering connection shall meet the design requirements, and low carbon steel shall be used with quality guarantee or inspection report.
1.1.6. The materials and specifications of aluminium alloy profiles for clean engineering shall conform to the design requirements or contract requirements, and have a factory certificate of qualification.

1.1.7. There are sufficient temporary storage sites for materials and for processing and semi-finished products of aluminium alloys in the clean engineering.

1.2. Construction Method of Clean Engineering
1.2.1. The dew-proof construction of glass windows. In the workshop, the room temperature is mostly about 22 degrees Celsius, while the corridor is between 18 and 28 degrees Celsius, which results in temperature difference. According to the calculation of thermal resistance and heat transfer of glass, there will be frost phenomenon (outside the window of the room), and the experience is the same, such as the browning of Zhuhai multi-storey. This phenomenon exists between the wire harvesting boards.
1.2.2. There are many wet processes in PCD process of waterproofing construction of partition wall in clean engineering, and the solution used in the production process is corrosive, which corrodes the color steel plate wall and affects the life of partition wall. Therefore, it is suggested that a cement foundation or a 50_wide civil structure with 80-100_high under the color steel plate partition wall should be designed for the partition wall in this workshop. It is specially made bricks, and then painted steel plate is made on them. If it is on the side of the purification workshop, Guangzhou Zijing specially designed and used profiles (big arc) to meet the requirements of the clean room. It is not on the side of the clean workshop that terrazzo and acid-resistant tiles are pasted on the top to ensure beautiful appearance.
1.2.3. There are many wet and corrosive PCD processes in the anti-corrosion construction of color steel plate wall of clean engineering. Corrosion of coloured steel sheets for partition walls in this kind of workshop often results in the replacement of coloured steel sheets after they are used for a short time. Guangzhou Zijing has done similar projects in the past. For workshops with corrosive articles, the conventional anticorrosion treatment of color steel plate walls is as follows:
A. Antiseptic cement spraying for wall surface of clean engineering;
B. Use acid and alkaline paint to brush the panel on the wall. (In this way, the life of the color steel plate can be prolonged by 5-6 years, and the normal use of stone markings is about 3 years, so replacement should be considered.)
1.2.4. Construction scheme of over-lifting and shrinking joints of color steel plate roof for clean Engineering The color steel plate ceiling is fixed on T-shaped aluminium on the top of lifting and shrinking joints, and on the other side is put on T-shaped aluminium.
1.3. Construction scheme of clean engineering:
1.3.1. Clean engineering lofting:
1. The baseline of longitudinal and transverse axes should be determined first according to the drawings, and the size of civil structures should be checked. Whether there is any discrepancy with the drawings or not.
2. Determine the position, distance and specifications of doors and windows according to the drawings and mark the opening direction of doors.
3. The horizontal pipe is used to determine the elevation of each axis in the clean engineering, and the elevation is marked on the column for accuracy.
4. After the clean Engineering lofting is completed, the owner and the designer should confirm that the color steel plate can be constructed only after the confirmation.
1.3.2. Secondary design of color steel plate for clean engineering:
1. The assembly design of partition wall and ceiling is carried out according to the actual size of field lay-out.
2. After drawing the plan of the actual construction site, according to the specifications and construction drawings of coloured steel plate, the layout of ceiling, partition board, high-efficiency air supply outlet, door and window, hole retaining, node sample and detailed dimensions of each part are designed.
1.3.3. Installation of bottom groove of partition wall in clean engineering:
1. Aluminum base must be close to the ground, and the error with lofting line is not more than 1.5_.
2. Aluminum alloy bottom groove must be cut according to the actual lay-out length, then waterproof double-sided glue, not double-sided glue after cutting. The base is 0.3 meters apart and is fixed on the floor with plastic expansion and galvanized tapping screw in the middle of the base.
3. The length and dimension of the corner of the bottom groove are determined in the clean engineering, which is convenient to install the outer round corner.
4. All structural fittings, partition walls, ceiling fixtures and hangers shall be connected with the main structure of the construction team, and shall not be connected with equipment brackets, air duct brackets and other pipeline brackets.
1.3.4. Vertical and roof installation of clean engineering:
1. The guide rail of the electric tool or equipment used for cutting must be protected by soft materials. The cutting edge of the cutting tool must be complete and sharp. The cutting edge of the cutting tool must be properly lubricated before the cutting edge is opened.
2. Check the completeness of the surface before using the color board. If the surface defect affects the appearance, it should be stored in another pile and properly protected for other use.
3. The marking error on both sides is not more than 2 feet.
4. Installation of vertical plate and roof is smooth, compact and uniform. Gap is controlled at 3_width to ensure the quality of subsequent glue beating. The vertical deviation of vertical plate is not more than 2.
5. The joints between the vertical roof and the roof are smooth and tight, and they are relatively flat after loading, and the deflection is strictly controlled to be less than L/240.
6. Longitudinal connection between roof and roof is in the form of buried steel beam. When the ceiling length exceeds 2500 feet, the suspension beam should be strengthened.
7. The position of all air outlets and lamps should be taken into account in the top plate typesetting so as to avoid the plate seam and ensure the strength of the steel plate.
8. Aluminum grooves should be used to protect the T-crossing of partition walls.
1.3.5. Production and installation of doors and windows:
1. Doors and windows are made of aluminum specially designed by our company.
2. When cutting aluminium alloy for doors and windows, the accuracy of appearance and size of aluminium alloy profiles should be checked, and unqualified materials should not be put into use; the thickness of corner fittings should not be less than 3 inches; before assembling, fixtures should be made and the size of fixtures should be accurate. When assembling, it is necessary to check the accuracy of size and maintain the correctness of fixture size.
3. The doors and windows should be assembled on the workbench, and the workbench should be cleaned at any time so as not to scratch the workpiece surface with debris. Places for storing materials and finished products should avoid entry of sharp objects. The finished and semi-finished doorframes and window frames are protected by special protective film.
4. Reinforcement points of door panels and doorframes connected with aluminium alloy profiles, the colour plate receptacle is not less than 3. Before assembling doors, the glass glue should be evenly struck on the inner surface of aluminium alloy profiles. Screws and rivets on door panels and frames have uniform spacing and uniform specifications.
5. The opening size of doors and windows should be accurate, so as to avoid the phenomenon that the opening size is larger than that of doorframes and window frames, which leads to the failure of aluminum profiles to encapsulate the opening. The edge of the hole is smooth. When the door is installed, the gap width is less than 4_and the deviation of the same gap is less than 1.5_.
6. When installing small windows on doors, clamp them in wooden square and remove them after the glass glue is dried out to ensure that the window frames and door panels are closely adhered to each other. Safety doors should be marked with striking red fonts and equipped with corresponding breaking tools.
1.3.6 Clean engineering openings:
1. Large holes such as installation holes of high-efficiency air supply outlet, return air duct holes and equipment perforations on the roof should be reserved when processing the color plate. Small holes are opened on site, and the holes are marked before opening.
2. Use profile cutter to cut holes in lofting position to prevent deviation.
3. All square and rectangular openings should be edged with aluminium or reinforced ribs.
4. When installing tuyeres and lamps, keep the surrounding level and tight.
5. All kinds of pipelines and pipes enter the clean area, and their sealing treatment is tight and reliable.
1.3.7. Corner decoration and gluing:
1. The radius of the rounded corners is made into 50 inches according to the requirements of the clean room.
2. The fillet decoration is carried out after the enclosure and ceiling are fixed and the construction site has been basically cleared. The screw spacing for fixing the rubber strip should not be greater than 20.
3. Vertically mounted rounded corners shall not have joints in the middle; horizontally mounted rounded corners shall be symmetrically arranged at the same area head if joints are required.
4. Check the appearance of rounded corners before construction. If the surface is defective, the defective section should be cut off, and the remaining parts should be used in suitable places according to the size.
5. Before fillet decoration, uncover the protective film to the position where the fillet can not be pressed; clean up the rubbish on the ground, do not let the rubbish gather in the space between the fillet and the ground, otherwise it will affect the overall beauty and indoor cleanliness.
6. The fillet joints should be straight and uniform, and the transition between fillet joints and three-dimensional joints should be smooth.
7. When gluing, the glue should fill the gap evenly. Clean up the excess glue after typing. Defects such as unsatisfactory filling, missing punching, weak sticking, hanging, etc. shall not occur. Neutral weatherproof sealant is selected as sealant.
8. Gluing and fillet decoration should be carried out by highly skilled and responsible personnel.
1.3.8. Clean engineering tuyere and lamp installation:
1. After installation and adjustment of ceiling and partition wall, static pressure box with high efficiency air supply outlet, return air outlet and lamps can be installed. After locating the tuyere according to the shape of the room and the number of tuyeres, the installation position of the lamps should be determined. The installation position of lamps and lanterns should take the position of tuyeres as a reference, and the arrangement is neat and beautiful.
2. Clean the high-efficiency air supply static pressure box before hoisting. Check the integrity of the paint coating or galvanized layer. If the paint coating or galvanized layer is damaged, it should be rusted and degreased, coated twice with epoxy resin, and then used after drying.
3. The installation holes on the ceiling are located correctly with square shape and size. Long galvanized bolt nuts are used to fix the high efficiency air supply static pressure box on the ceiling before hoisting. Then hang the static pressure box with the suspender and basket screw. When adjusting the basket screw, the tightness should be appropriate, and the flatness of the ceiling should not be affected.
4. After installing the high-efficiency air supply static pressure box, it should be thoroughly cleaned and sealed with wrinkle glue and plastic film. The seam between the high efficiency air supply static pressure box and the color plate should be glued to ensure the air tightness of the room.
5. Aluminum grooves should be inserted around the installation holes of return and exhaust vents, and the outlets should be closed. The position and direction of the fixed tuyere screw should be easy to disassemble, and the screw should be made of stainless steel.
6. Attention should be paid to protecting the damper layer during installation of return and exhaust vents. If cracks or holes larger than 10 feet are found, they should be replaced in time.
7. The location and size of the return exhaust air opening should be strictly in accordance with the design drawings. If it really needs to be changed, the project manager should be notified to consult the owner and the design unit and change it after redesigning.
1.3.9. Filter installation:
1. Initial and intermediate-effect filters should be supported by non-corrosive materials. The installation screw is made of stainless steel.
2. Installation of Clean Engineering High Efficiency Filter:
(1) Leakage should be checked before installation of high-efficiency filters. If the filters are newly manufactured, they can be exempted from checking.
(2) High efficiency filters should be unpacked and installed in the clean room and air-conditioning system after comprehensive cleaning and continuous commissioning of the system for more than 12 hours.
(3) Appearance inspection should be carried out before installation of high efficiency filters. Visual inspection of deformation, shedding, fracture, holes and other damage phenomenon.
(4) Installation immediately after visual inspection is qualified. Installation should be strictly in accordance with the direction of airflow indicated by the nameplate, and can not be reversed. It should be handled lightly and tightened carefully to prevent damage to the filter element and affect the effect. If there is damage, use neutral sealant to repair and install after drying.
_After the installation of the high-efficiency filter, it is necessary to confirm the installation. The sampling device of the dust particle counter is 15-25 from the gap between the high-efficiency filter and the static pressure box. It moves at the speed of 20-40_per second. Particles larger than 0.5_are within the scope of the specifications and there is no abrupt change in quantity. The installation is qualified, otherwise they should be re-installed.
3. Manufacture of clean Engineering fan box:
(1) The fan box shall be determined according to the shape size of the fan, the specifications of the middle-effect filter and the site location.
(2) If the fan power is greater than 3 kW or the air volume exceeds 4000 m3/h, shock absorbers should be installed.
(3) Every crack in the inner wall of the fan box must be sealed with neutral weather-resistant sealant.
(4) The overhaul door of the fan intake section should be opened outward, and the overhaul door of the outlet section should be opened inward.
The installation box of the fan must be firm and reliable, with reasonable location and without affecting other operations.
The material selected for making fan box must have anti-corrosion performance or take effective anti-corrosion measures. The screw of the primary and intermediate filter is made of stainless steel; the frame is made of non-corrosive material, and the place where the anticorrosive layer is damaged is coated twice with anticorrosive paint and silver oil once.
4. Installation of Purification Equipment for Clean Engineering
When installing special cleaning equipment such as transfer window and differential pressure gauge, the opening size should be appropriate, the clearance should be uniform, and the horizontal and vertical degrees meet the requirements. After the transfer window is installed, it must be decorated with rounded corners around it. The joint between the equipment and the color plate must be sealed with neutral weather-resistant sealant.
(2) Pressure differential gauge should be installed in secret and thermometer should be installed in open. Other equipment shall be determined as required. If other production equipment needs to be installed on or through the enclosure, the size of the opening should be accurate. Regular holding holes should be sealed with slot aluminium, and the four corners should be connected at 45 degrees. If it contains irregular shape such as arc, it is necessary to process the edge of stainless steel decorative ring. The neutral weatherproof sealant should be uniformly applied to the contact area with the color plate.
(3) When installing all the equipments crossing the color plate, the operation and maintenance space of the equipments should be considered and reserved.