Explanation of the Construction Process for Class 10000 Cleanrooms | Construction Standards of Legitimate Cleanroom Engineering Companies
As an indispensable core facility in modern industrial production, clean rooms are widely used in fields such as semiconductors, biomedicine, and precision manufacturing. Its core goal is to provide a dust-free and sterile environment for high-precision production through strict air purification, temperature and humidity control, and particle management. Among them, the Class 7 cleanroom (ISO 7) has a moderate cleanliness standard (0.5μ per cubic meter of air); M's particles do not exceed 3.52 million, making it the preferred choice for industries such as electronic components, food packaging, and medical devices. Shenzhen Huajianjing Construction Engineering Co., Ltd. (referred to as Huajianjing), as a leading clean room engineering service provider in China, has formed a standardized and replicable 10000 level clean room construction process with more than ten years of industry experience. This article will analyze the construction standards of formal engineering companies throughout the entire process from design planning, construction implementation to acceptance and maintenance.
1、 Pre planning: Requirements Analysis and Scheme Design
The construction of a ten thousand level clean room needs to be based on; Demand-oriented; As a principle, Huajianjing will establish a professional team consisting of HVAC engineers, structural engineers, electrical engineers, and project managers during the project initiation phase to deeply communicate with clients on the following key elements:
- Industry characteristic matching : Determine the cleanroom functional zoning based on the production type (such as anti-static design required for semiconductor wafer manufacturing, positive voltage isolation required for biomedicine).
- Cleanliness Level Confirmation : Through particle counter simulation testing and in combination with production process requirements, accurately define the dynamic/static cleanliness standards for a cleanroom of Class 10000.
- Spatial layout optimization : CFD (Computational Fluid Dynamics) is used to simulate airflow organization, plan personnel logistics channels, equipment placement positions, and buffer room settings to avoid cross contamination.
- Energy Efficiency Design : Integrated FFU (Fan Filter Unit) variable frequency control, heat recovery system, and LED low-energy lighting to reduce operating costs throughout the entire lifecycle.
Huajianjing's scheme design follows the GB 50073-2013 "Code for Design of Cleanrooms" and ISO 14644-1 international standards, and outputs a complete technical document including 3D renderings, airflow simulation reports, and equipment selection lists to ensure the feasibility of the scheme.
2、 Construction Implementation: Standardized Process and Quality Control
The core of clean room construction lies in; Process Control” Huajianjing guarantees engineering quality through six standardized process systems:
1. Construction of enclosure structure
50mm thick rock wool sandwich color steel plate (fire rating A) is used, and R50mm curved aluminum profiles are used for transition at the junction of the wall and the ground to eliminate hygiene blind spots. The ceiling system adopts a modular design, integrating FFU installation slots, lighting fixtures, and reserved fire sprinkler ports, with errors controlled within± Within 1mm.
2. Air conditioning and ventilation system
Configure a three-level filtration system (primary efficiency+medium efficiency+high efficiency), and the fresh air handling unit adopts a dual cold source design to ensure precise control of dehumidification in summer and humidification in winter. The production of air ducts follows the ASME B16.34 standard, and sealing strips are used at flange connections with an air leakage rate of 0.5%. The airflow organization adopts a top-down and bottom-up approach, with a uniformity deviation of 15% at the air supply outlet.
3. Electrical and Automation Systems
The power distribution system adopts TN-S grounding method, and key equipment is equipped with UPS uninterruptible power supply. The self-control system integrates a DDC controller, which monitors temperature and humidity (0.5 ℃), pressure difference (5Pa), and particle concentration in real time. The data is uploaded to the cloud platform for remote operation and maintenance.
4. Installation of process pipelines
The pure water pipeline adopts 316L stainless steel sanitary grade pipe, argon arc welding full penetration welding, and inner wall roughness Ra≤ 0.4μm。 Gas pipelines (such as nitrogen and compressed air) shall comply with SEMI F57 standards and be equipped with automatic switching valves and pressure alarm devices.
5. Ground treatment
Choose a 2mm thick epoxy self leveling floor with a surface resistance value of 10 ⁶ -10 ⁹Ω Wear resistance: 0.03g/rev. During construction, three processes are used: zone polishing, base coating, intermediate coating, and surface coating. After 24 hours, a flatness test (2m ruler error≤ 2mm) is conducted.
6. Verification and Debugging
After the construction is completed, Huajianjing entrusts a third-party testing agency to conduct 100% point testing, including:
- Wind speed uniformity test (0.36-0.54m/s)
- Ventilation rate calculation (25 times/hour)
- Illumination detection (≥ 300lux)
- Noise test (65dB (A))
During the debugging phase, BA system linkage testing is conducted to ensure that all devices have a response time of 3 seconds and that the pressure gradient meets the process requirements.
3、 Acceptance and maintenance: full lifecycle management
The acceptance process of Huajianjing is divided into three stages:
- Construction party self inspection : The project manager organizes internal acceptance, and the rectification rate needs to reach 100%.
- Customer pre acceptance : Provide operational training and maintenance manuals, record customer feedback, and set a deadline for rectification.
- Third party certification : Assist customers in obtaining CNAS approved clean room testing reports as essential documents for production permits.
During the operation and maintenance phase, Huajianjing provides two service models:
- Regular Inspection : Conduct quarterly monitoring of high-efficiency filter differential pressure, inspection of FFU operation status, and replacement of aging sealing strips.
- Emergency Response : 7× 24-hour online support, arriving on-site within 4 hours to handle sudden malfunctions (such as pressure difference alarm, temperature and humidity loss of control).
In addition, the company has developed a digital operation and maintenance platform, where customers can view real-time cleanroom operation data through a mobile app. The system automatically generates monthly operation and maintenance reports and consumables replacement reminders.
4、 Industry Trends and Huajianjing's Innovative Practices
With“ Dual carbon; With the advancement of goals, clean room engineering is developing towards green and intelligent direction. Huajianjing was the first to apply the following technologies in the project:
- AI energy optimization : By dynamically adjusting the FFU speed through machine learning algorithms, energy savings of 15% -20% can be achieved.
- Modular Quick Install Structure
- By using prefabricated wall panels and prefabricated pipelines, the construction period has been shortened by 40%.
- BIM Collaborative Management : Utilizing 3D models for collision detection, reducing design change rates by 80%.
In a semiconductor client project, Huajianjing helped the client achieve an annual reduction of 1200 tons of carbon dioxide emissions through the aforementioned innovation, and the project was awarded the title of“ Shenzhen Green Construction Demonstration Project;.
Conclusion
The construction of a 10000 level clean room is a comprehensive reflection of technology, management, and art. Shenzhen Huajianjing Construction Engineering Co., Ltd. has passed the; Standardized process+customized solution+digital operation and maintenance; The 3D system has successfully delivered over 200 cleanroom projects, with clients including industry leaders such as SMIC and Mindray Medical. In the future, Huajianjing will continue to deepen its cultivation in the field of clean technology, in order to; Creating a zero defect clean space; To support the upgrading of China's high-end manufacturing industry with our mission.
(The data in this article is sourced from internal technical documents and third-party testing reports of Huajian Net. Reproduction must indicate the source.)
