How to test whether the design and construction of new dust-free workshop meet the standards

The dust-free workshop is under construction. How can the construction unit and the owner confirm whether the new dust-free workshop has reached the design standards? Then the dust-free workshop inspection is a very necessary link before the construction of the dust-free workshop is completed and handed over to the owner for use. Whether the inspection of the dust-free workshop reaches the standard will directly affect whether the dust-free workshop meets the production requirements.

Dust-free workshop inspection

The production environment of many industries must be a dust-free workshop. After the construction of a dust-free workshop is completed, many customers do not know how to judge whether the dust-free workshop is up to the standard and whether it meets the production needs of their own enterprises. Then what tests do they need to pass when testing the dust-free workshop? According to the standard of IES- RP-CC006.2 dust-free workshop test, the working state of the dust-free workshop is divided into three kinds: empty state, static state and dynamic state. The test method depends on the type of the design of the dust-free workshop and the working state of the dust-free workshop. Specific detection is divided into the following two parts:

First, air volume debugging of dust-free workshop

This debugging is mainly calculated according to the design and construction drawings, and the design air volume can be calculated when the dust-free workshop is constructed. When testing the cleanliness of the new dust-free workshop, it is mainly divided into the following three states: empty condition, static condition and dynamic condition. After the construction of the dust-free workshop, enterprises can test the cleanliness of the dust-free workshop under these three conditions, focusing on whether the cleanliness of each state meets the standards required by the enterprise.

Second, the pressure differential debugging of dust-free workshop

The differential pressure requirements of the dust-free workshop are mainly set to avoid external pollutants entering the clean room. At the time of design, the internal pressure of the dust-free workshop is higher than the external pressure in order to avoid pollutants from entering the dust-free workshop, so it is very important for the pressure difference test.

It is specially reminded that when all the tests are up to the standard, the indicators of the dust-free workshop should be re-tested and debugged every once in a while. It is necessary to ensure that the data of the dust-free workshop in the south of China Construction Corporation are in line with the relevant production standards of the industry, so as to ensure the safety of production.

In fact, there is no need to worry about the formal clean workshop design company must consider more comprehensive, in addition, you can also through the clean workshop test, evaluate whether the standard. The standard testing method of dust-free workshop is as follows:

1. Working status of dust-free workshop:

Construction contracts for dust-free plants usually specify only the most basic air tests, while static and dynamic tests are often omitted due to tight deadlines. However, we still recommend that contractors and owners test the dust-free workshop under both static and dynamic conditions. This will ensure that the dust-free workshop is constructed according to the design requirements. The comparison of the test results under static and dynamic conditions will provide effective help to the analysis of the problems existing in the dust-free workshop. For example, the cleanliness is up to standard under static conditions, but exceeds the standard under dynamic conditions. This may be because of poor management of dust-free workshop: non-standard cleaning when installing the machine, inappropriate cleaning procedures, lax discipline management, incorrect placement of the machine (blocking the return air outlet or blocking the air supply of the filter), etc. Therefore, it is recommended to test the dust-free workshop in both empty and dynamic conditions.

2. Test standards and practices of dust-free workshop:

All dust-free workshop tests are basically based on internationally recognized standards (e.g. ISO14644-1; IEST - RP - CC006.2; The NEBB manual and the terminated FS-209E). These standards and practices provide the most basic guidance for the testing and certification of dust-free workshops. As a matter of fact, the owners and contractors of the dust-free workshop have different agreements on the technical indicators, test methods and acceptance standards of the dust-free workshop due to the requirements of the products and processes.

Therefore, most of the acceptance criteria are agreed upon by the owners and contractors of the clean shop through consultation, with reference to the recommendations of professional clean shop testing and certification companies. Since independent third-party testing and certification companies are usually able to put forward suitable solutions for the testing of dust-free workshops, CSCC South recommends that owners and contractors invite testing and certification companies to participate in the discussion of various technical parameters, testing methods and acceptance standards of dust-free workshops. In case of disagreement on relevant parameters or standards, the testing and certification company will act as a mediator between the owner and the contractor with its professional knowledge.

3. Selection of test items in dust-free workshop:

The recommended test items for a clean shop include filter wind speed uniformity, filter installation leak detection, differential pressure, airflow parallelism, cleanliness, noise, illumination, humidity/temperature, etc. These are the basic test items, which include both primary and secondary test items. These items shall conform to the standards and parameters of the original design of the clean shop and the test certification shall be completed before the clean shop is handed over to the owner.

Four major items (filter wind speed and its uniformity, filter installation leak detection, differential pressure and cleanliness) are the most important and basic items in all the dust-free workshop tests. This must be done before the equipment enters the dust-free workshop. Other auxiliary test items such as airflow parallelism (only applicable to unidirectional dust-free workshop), temperature, humidity, illumination and noise also need to be completed, as they are related to the air movement and environmental parameters in the dust-free workshop. We think we need to do these auxiliary tests at least under dynamic conditions.