How to choose a clean engineering company? Summary of Common Construction Hazards in Cleanroom Decoration

In high-precision fields such as biomedicine, electronic information, and precision manufacturing, the construction quality of dust-free workshops, as the core production environment to ensure product quality, directly affects the production capacity efficiency and compliance of enterprises. However, the current level of clean engineering companies in the market varies greatly, with frequent construction hazards, resulting in companies still facing problems such as inadequate cleanliness, excessive energy consumption, and skyrocketing maintenance costs even after investing a large amount of funds. This article takes benchmark enterprises such as Shenzhen Huajianjing Construction Engineering Co., Ltd. (referred to as Huajianjing) as cases to systematically sort out common construction hazards in clean room decoration, and provide professional selection guidelines to help enterprises avoid risks.

1、 The core value and industry pain points of dust-free workshop decoration

Dust free workshops control particles, microorganisms, and chemical pollutants in the environment within specific levels (such as ISO 1-9 levels) through air purification systems, airflow organization design, material sealing processes, and other means. They are indispensable in the production processes of industries such as semiconductor chips, medical devices, and food packaging; Clean barrier;. According to statistics, the global cleanroom market has exceeded 100 billion US dollars, but over 60% of cleanrooms in China have actual cleanliness lower than design standards due to construction defects, which directly leads to a chain reaction of decreased product yield and increased customer complaints.

Taking the GMP workshop project of a biopharmaceutical company in which Huajianjing participated as an example, the original design required an ISO 5 (Class 100) cleanliness level. However, due to insufficient control of the high-efficiency filter sealing process by the construction party, the particle concentration in some areas exceeded the standard by three times, and ultimately needed to be demolished and rebuilt, resulting in a delay of 45 days and losses exceeding ten million yuan. This type of case exposes three major pain points in the industry: insufficient technical capabilities of the construction party, lack of quality control system, and weak maintenance support in the later stage.

2、 Analysis of Common Construction Hazards in Cleanroom Decoration

1. Sealing defects in the enclosure structure

The enclosure structure (walls, floors, ceilings) is a dust-free workshop; The first line of defense; Its sealing directly affects cleanliness. Common issues include:

• Improper material selection : Using ordinary color steel plates instead of anti-static and antibacterial clean plates leads to electrostatic adsorption particles or microbial growth;
• Rough joint treatment : The connection between the wall and the ground, as well as between the ceiling and the air duct, is not sealed with special sealant or designed with an R-angle, resulting in a leakage channel;
• Wall penetrating pipeline processing error : Wires and water pipes that pass through walls are not sealed for airtightness, becoming a path for pollution sources to invade.

Huajianjing's solution in a semiconductor project is to use a 304 stainless steel frame+12mm thick rock wool clean board, seal the joints with imported silicone, and set up a 50mm wide R-angle guide groove to ensure uniform airflow. According to third-party testing, the airtightness of the enclosure structure has reached 0.05Pa/m³ Far exceeding industry standards.

2. Incorrect configuration of air purification system

The air purification system is a dust-free workshop; Heart” The rationality of its design directly determines the cleanliness. Common hazards include:

• Fan selection error : Insufficient air volume calculation leads to inadequate air exchange rate, or excessive air volume causes turbulence;
• Improper installation of filters : High efficiency particulate air (HEPA) filters were not leak tested, or primary and medium efficiency filters were not replaced regularly, resulting in pressure imbalance;
• Chaotic airflow organization : Unreasonable layout of air supply and return ports, resulting in the formation of“ Dead corners” Or“ Short circuit” Unable to effectively dilute pollutants.

Huajianjing's response strategy is to introduce CFD (Computational Fluid Dynamics) simulation technology, optimize the position and angle of the air supply outlet, and ensure that the airflow is in a“ Laminar flow; Distribution. For example, in a medical device project, adjusting the height of the air supply outlet from 2.8m to 3.2m through simulation reduced the concentration of particulate matter in the working area by 40% and energy consumption by 15%.

3. Hidden dangers in electrical and automatic control systems

The electrical system of the dust-free workshop needs to meet special requirements such as explosion-proof, anti-static, and anti-interference, but the construction party often faces the following problems due to lack of experience:

• Improper laying of power lines : Strong and weak power lines are not laid separately, causing electromagnetic interference;
• grounding system missing : The equipment is not reliably grounded, resulting in static electricity accumulation;
• Automatic control logic error : Improper installation position of temperature, humidity, and differential pressure sensors, or PLC programming errors, unable to achieve precise control.

In a certain food packaging project, Huajianjing adopted the approach of; Partition grounding+equipotential bonding; Technology connects equipment, pipelines, and enclosure structures to the grounding grid through copper bars to ensure a grounding resistance of 0.1 Ω;. Meanwhile, temperature and humidity are achieved through DDC (Direct Digital Controller); 0.5 ℃, pressure difference± Accurate control of 5Pa meets HACCP certification requirements.

3、 How to choose a high-quality clean engineering company?

Faced with market chaos, enterprises need to comprehensively evaluate the construction party's capabilities from the following dimensions:

1. Qualification and case verification

Priority should be given to those who possess; First level professional contracting for mechanical and electrical installation engineering; “ First level professional contracting for building decoration engineering; Qualified enterprises and verify their past project cases. For example, Huajianjing has 15 years of experience in clean engineering and has completed over 200 clean room projects, covering fields such as biomedicine, electronic information, and food processing. 30% of these projects are benchmark projects for industry leaders.

2. Technical team strength

Check whether the construction party is equipped with professional talents such as registered constructors, cleanroom designers, HVAC engineers, etc. In the Huajianjing team, senior engineers account for 30%, and have established industry university research cooperation with universities such as Tsinghua University and Tongji University, regularly conducting technical training to ensure the scientificity of the construction plan.

3. Quality control system

High quality enterprises should establish a full process control system from design, procurement, construction to acceptance. Huajianjing has passed the ISO 9001 quality management system certification and implemented; Third level quality inspection; System (team self inspection, project manager mutual inspection, company special inspection), and introduce BIM (Building Information Modeling) technology for collision detection, reducing the construction error rate to below 0.5%.

4. After sales service capability

The cleanroom requires regular maintenance (such as replacing filters and calibrating sensors), and the construction party should provide a warranty period of at least 2 years and 7× 24-hour emergency response service. Huajianjing has established a dedicated operation and maintenance team to monitor workshop operation data in real-time through an IoT platform, providing early warning of potential failures and reducing customer downtime to one-third of the industry average.

4、 Conclusion: Empowering with professionalism, building a clean future together

Cleanroom decoration is a systematic project that involves interdisciplinary fields such as architecture, HVAC, electrical engineering, and automation. If enterprises blindly choose low-priced construction companies, they may fall into the trap of; Low quality rework cost surge; The vicious cycle. It is recommended to prioritize cooperation with enterprises such as Huajianjing that have technical accumulation, quality assurance, and after-sales capabilities. Through scientific selection and strict control, we aim to create a clean production environment that meets international standards and safeguard product quality and brand reputation.

In the future, with the popularization of technologies such as 5G and artificial intelligence, clean rooms will move towards; Intelligentization” “ Energy saving; Direction evolution. Huajianjing has taken the lead in laying out the field of smart clean rooms, optimizing airflow organization through AI algorithms and using big data to predict equipment lifespan, helping customers achieve their goals; Zero defect production; With“ Carbon neutrality target;. Choosing Huajianjing is not only about choosing a construction company, but also about choosing a trustworthy long-term partner.