Cleanroom construction is a systematic engineering process. Typically, within the large space formed by the main structural framework of civil construction, compliant decorative materials are used to partition and finish the area according to technical requirements, creating cleanrooms that meet various operational needs. Pollution control inside cleanrooms requires collaboration between specialized purification HVAC systems and automation control systems. What are the specific details of cleanroom construction? In this edition, the editors of Zhongshan Kewate Electromechanical Cleanroom Engineering Company will share a comprehensive guide to cleanroom construction details that even laypersons can understand at a glance.

• Simple and elegant appearance

• Advanced equipment

• Creating a safe, clean, energy-efficient, and comfortable experimental and production environment

• The vertical height from the cleanroom ceiling to the floor is 3 meters.

• Noise inside the cleanroom must be ≤60 dB.

• Relative humidity: 40%–60%, temperature: 22°C ± 3°C. In summer, it should not exceed the upper limit; in winter, it should not fall below the lower limit.

• Partition walls inside the cleanroom are made of high-quality double-sided composite sandwich purification color steel panels, supplemented with glass window partitions.

• Partitions must provide thermal insulation, soundproofing, corrosion resistance, fire resistance, and ease of cleaning and disinfection.

• The junctions between color steel panel walls and the floor, as well as between color steel panel walls, are treated with epoxy resin-coated aluminum alloy arcs with a radius of no less than 30 mm.

• Seams of color steel panels must be sealed. Sealants must be imported medical-grade sealants that do not emit volatile toxic gases.

• The surface coating of color steel panels, arc epoxy resin spray materials, and seam sealants must possess anti-static properties to prevent harmful particles from adhering to the wall surface.

• Color steel panels must be test-fitted before installation.

• Corridor partition walls use semi-height tempered glass windows with imported oxidized aluminum treatment (double-glazed with adjustable aluminum blinds). Glass thickness is 8 mm, with the lower edge 1,100 mm from the floor.

• Partitions between areas use 12 mm sandblasted tempered glass.

• M6 expansion bolts are installed every 1,200 mm to fix the aluminum channels for color steel panels. The horizontal deviation of aluminum channels must not exceed ≥3 mm and must not affect the installation of color steel panels.

• Color steel panels are vertically inserted into the aluminum channels. During insertion, electrical conduit installation must be coordinated, and conduits must be vertically inserted into the color steel panels.

• The insertion process must maintain the flatness of the color steel panels, avoiding dents caused by electrical conduit installation.

• After inserting the color steel panels into the aluminum channels, 50 mm * 50 mm L-shaped angle iron is suspended from the ceiling slab and fixed to the color steel panels with self-tapping screws.

• The L-shaped angle iron must be welded with 45° diagonal braces to prevent horizontal shaking of the installed color steel panels.

• All gaps in the enclosure structure (seams, wire passages, pipe penetrations, nail holes, and edges of sealing covers for all openings) must be sealed. The tightness of gaps must be highly prioritized.

• After installation, all junctions must be treated with arcs to avoid sanitary dead corners.

• Thickness: 50 mm (single-sided color steel panel), width: 1,200 mm, length: customizable based on room height.

• Wall strength performance: For a 5-meter-high wall panel with a pressure difference of 40 Pa on both sides, the deflection must be less than 2 mm/m.

• The color composite steel plate is 0.6 mm thick, with a 50 mm glass magnesium board core and a filling density greater than 110 kg/m³.

• The fire resistance limit of the wall must be greater than 1 hour, complying with the GB50045-95 standard for non-load-bearing exterior walls and partition walls in疏散 corridors of first-class fire-resistant buildings.

• Ceiling type: 50 mm thick walkable color steel panel continuous ceiling with a glass magnesium board core. Load-bearing capacity: greater than 150 kg/m².

• Panels are connected via tongue-and-groove joints, with hidden "古"-shaped keels. The surface color steel panel thickness is 0.6 mm.

• All corners between walls and ceilings, as well as between walls, are arc-connected with 1.2 mm thick aluminum alloy. The inner arc radius is 50 mm, and the outer arc radius is 70 mm.

• Trims and corner accessories use champagne-colored electroplated profiles.

• DNA cleanrooms use dedicated PVC roll flooring for cleanrooms, with a thickness of ≥2 mm.

• The junction between the floor and walls is treated with an arc of R≥50 mm.

• Dedicated PVC rubber flooring for cleanrooms is safe, non-toxic, resistant to pollution and chemicals, and easy to clean.

• Seams of PVC rubber flooring are seamlessly connected with dedicated welding rods. The color will be confirmed by the client after the winning bidder enters the site.

• Walls and partitions use glass magnesium sandwich color steel panels, 50 mm thick, with a steel plate thickness of 0.6 mm.

• Aluminum alloy profiles provide excellent aesthetics, ease of cleaning, and construction.

• The inner arc radius is 50 mm, and the outer arc radius is 70 mm. Trims and corner accessories use champagne-colored electroplated profiles.

1. Door frames for walls and door openings (including jambs and trims) use =1 mm 304 brushed (satin) stainless steel.

   • Each door has no fewer than three stainless steel hinges.

   • The final quantity and specifications of doors and windows will be confirmed after the winning bidder enters the site and reviews the floor plans and on-site conditions.

2. Door panels: 50 mm thick, made of 0.6 mm high-quality electrogalvanized steel plates, filled with glass magnesium boards fully bonded to the steel plates to ensure strength.

   • Equipped with 2 safety steel pins and 3 PVC strips.

   • The door panel color will be finalized by the client.

3. Door frames: Rectangular frames with built-in connecting corners, 45-degree spliced, made of 1.2 mm thick high-quality aluminum alloy profiles.

   • EPDM sealant strips are embedded in the sealing grooves.

4. Hardware accessories: High-quality concealed two-level lock bodies, high-quality lock cores, black engineering plastic arc-shaped fire-resistant handles, integrated cover plates, and fixed leaves for double doors with integrated concealed bolts.

   • Hinges must be flush with the door leaves and frames after installation to facilitate cleaning.

5. Doors include rounded vision windows, with glass fixed by steel glass pressure strips.

   • Pressure strips and corner accessories use champagne-colored electroplated profiles.

   • Vision window glass must be tempered safety glass, with a thickness of no less than 6 mm (refer to design drawings for dimensions).

   • Doors are equipped with door closers to ensure automatic and gentle closing. Materials and colors must harmonize with the door body.

1. Before construction, the layout team must inspect and accept the site handed over by the foundation treatment team.

   • Pre-inspection by the supervision team is required before work begins.

2. The layout team must be familiar with the light sources, dimensions, site shape, client requirements, paving sequence, and material conditions.

   • Materials must be arranged according to drawings, minimizing waste and repurposing scraps where possible.

   • The arrow direction on the back of PVC flooring must be consistently aligned.

3. Materials must be laid out as blanks, with door cards and corners notched.

   • Notches must align with baseline gaps not exceeding 1 mm, ensuring smooth lines.

   • The height of the flooring material relative to doors and other materials must be checked.

   • All overlapping seams paving team for trimming, with an overlap of 50 px.

   • Panels near light sources must overlap on top, with rough edges underneath.

   • Seams should be perpendicular to light sources, with exceptions handled case-by-case.

4. Avoid material squeezing and deformation, especially for materials deformed during transportation.

   • Avoid using deformed materials in areas with strong side lighting or critical "first impression" spots.

   • Place them in areas with weak or no side lighting or corners.

   • Compare and select materials with color differences, avoiding adjacent拼接 of highly dissimilar materials.

   • Apply the same principles to scrap material arrangement.

1. The paving team must inspect the layout team's material usage, notch alignment, material placement, and seam accuracy before starting.

   • Handover procedures must be completed, and the layout team's intentions understood.

2. Paving must be conducted in an enclosed area, with unauthorized personnel prohibited to prevent contamination.

   • Operators must wear flat soft-soled shoes or work barefoot; hard-soled shoes are not allowed.

3. Seam trimming must be done with a ruler.

   • The blade depth of the trimming knife should be twice the floor thickness plus 0.5 mm to ensure clean cuts.

   • The knife's pressure plate must be padded with PVC flooring scraps to prevent blade倾斜.

4. Adhesive must be mixed strictly according to ratios to avoid compromising bond strength.

   • Mix thoroughly for about 2 minutes, avoiding high-speed mixing to prevent overheating.

   • The ratio of hardener to adhesive is 1:5 by weight.

5. Measure the paving area before mixing adhesive to determine the amount needed.

   • Plan the paving sequence. Apply adhesive before paving, using paper tape for seams between adhesive groups.

   • Remove tape after adhesive application to ensure neat edges.

   • For 3.5 mm thick materials, use an A2 notched trowel; for 2 mm materials, use A2 on the first floor and A1 on higher floors.

   • Check trowel wear regularly, especially for A1 notches.

6. For different adhesive batches, plan based on their reaction speeds.

   • Conduct small-area tests to determine open time and keep the adhesive surface clean.

   • The ideal paving time is when the adhesive can form strings.

   • Avoid stepping on the back of rolled-up PVC flooring during open time.

7. Start paving from the well-lit end after the predetermined open time.

   • Establish a reference panel, then align other panels accordingly.

   • Press out bubbles toward the other side to ensure full contact with the adhesive.

   • Leave one seam (both and) for error adjustment during paving.

   • Trim seams shortly after paving and compaction. Clean excess adhesive immediately with liquid wax.

   • Focus on seams parallel to side lighting; adhesive seams should be perpendicular to side lighting.

8. Operators must stand on footboards (1 m * 0.45 m * ≥1.7 cm) during paving.

   • Avoid direct stepping on newly paved PVC flooring to prevent uneven adhesive distribution or bubbling.

   • Assign one person to inspect from a vantage point (e.g., against light) to guide paving and address issues promptly.

9. For seams, use a small roller perpendicular to the seam line, rolling over at least 0.45 m.

   • Assign专人 to roll and inspect edges and corners to ensure firm bonding and avoid voids.

   • Address voids before the adhesive dries.

10. After paving, evacuate all personnel except one roller operator.

    • No stepping on the floor for 1 hour post-paving.

    • Perform comprehensive rolling with a large roller 30–40 minutes later.

    • Repeat rolling as needed based on temperature.

11. Keep the site封闭 as long as possible after paving.

    • No foot traffic for 12 hours; wet cleaning and waxing only after 48 hours.

1. Temporarily seal existing下水 pipes and floor drains to prevent debris entry.

2. Determine pipeline endpoints and map routes on walls and floors accordingly.

3. Groove width and depth are typically 1.5 times the pipe diameter, with a burial depth >15 mm.

4. New water supply pipelines must undergo pressure testing:

   • Multi-story: 0.6 MPa; high-rise: 0.8 MPa.

   • No leakage after 1 hour, with pressure loss ≤0.05 MPa.

   • For metal and composite pipes, pressure drop after 10 minutes ≤0.02 MPa.

5. Install pipe clamps 100 mm from corners, joints, meters, valves, and endpoints for pipes <25 mm OD.

   • Clamp spacing: 600 mm horizontally; clamps must be secure.

6. Pipelines should be "horizontal and vertical," minimizing detours.

7. All joints, valves, and connections must be tight and leak-free.

   • Threaded connections must have exposed threads (8 turns in, 5 exposed), with >5 wraps of sealant tape.

   • Tighten without reverse twisting. Secure with clamps promptly.

1. Socket height: 280–300 mm, per standards and design requirements.

2. Determine switch and socket endpoints, then map conduit routes on walls and floors.

3. Grooving must be guided by lines, with burial depth >15 mm.

   • If structural reinforcement is encountered, use wax tubes with sheathed wires.

4. Use dedicated PVC flame-retardant conduits (wall thickness ≥1.0 mm) fixed in grooves.

   • Layout should be "horizontal and vertical," rational, and avoid excess conduits.

   • Insert wires after conduit installation to allow future replacement.

5. Conduits and junction boxes must be of the same material.

   • Minimize bends; use spring benders to avoid deformation.

   • No more than 3 crescent bends per conduit; use junction boxes for more.

   • Connect joints with adhesive couplings, avoiding crescent bends.

   • Use lock nuts for conduit-box connections.

6. Use flame-retardant wire nuts for joints in junction boxes.

   • Follow color coding: phase wires (red, yellow, green, preferably red), neutral (blue, black, preferably blue), ground (bicolor), lamp cords (white).

   • Maintain consistency within the same building.

7. Connect wires to switches and sockets:

   • Sockets: top terminal for ground, left for neutral, right for phase.

   • Lamp holders: shells must not connect to phase wires.

   • Leave ≥150 mm of wire in boxes.

8. Conductor cross-sectional area must not exceed 40% of the conduit’s inner cross-section.

   • No joints or twists inside conduits.

   • Do not mix wires of different usage or voltages in one conduit.

9. Ensure reliable grounding:

   • Phase-neutral and phase-ground resistance >0.5 MΩ.

   • Metal conduits, flexible tubes, and distribution box shells must be grounded