Iso 146443pdf Jun 2026

: Standardizing language for airborne particle measurement, airflow, and physical states.

The standard provides a comprehensive set of test methods to verify that a cleanroom is operating within its specified parameters. These tests are applicable to both unidirectional (laminar) and non-unidirectional airflow systems across three occupancy states:

This test ensures that the cleanroom has the correct pressure differential relative to adjacent areas (pressure cascade) to prevent contamination from entering cleaner zones. 4. HEPA/ULPA Filter Integrity Test (Leak Test) iso 146443pdf

| Feature / Test | ISO 14644-3:2005 | ISO 14644-3:2019 | | :--- | :--- | :--- | | | Contained its own guidance. | References ISO 14644-1 for classification procedures. | | Filter Leak Test (B.7) | Complex procedure with noted errors. | Simplified and corrected. Requires a pre-test airflow velocity check. Specifies a scan speed of 5 cm/s. | | Upstream Aerosol Concentration | Required 10–100 mg/m³. | Expanded range to 1–100 mg/m³, but notes that not all photometers are suitable for the lower concentration. | | Deleted Methods | Included methods for airborne ultrafine particles and macroparticles. | These methods have been removed. | | Added Methods | None. | Introduced the segregation test . | | Recovery Test Recommendation | No specific restriction. | Not recommended for unidirectional airflow cleanrooms, as they typically have very fast recovery times. | | Test Instruments | Specifications based on technology at the time. | Updated requirements for test instruments to reflect technological advances. | | Document Length | 72 pages. | Slimmed down to 60 pages. |

Specifications for test apparatus were updated to ensure higher accuracy and reliability. 3. Core Testing Methods in ISO 14644-3 | | Filter Leak Test (B

在半导体制造、制药生产、医疗器械组装等对污染极度敏感的行业中，洁净室是保障产品质量和工艺可靠性的核心基础设施。而ISO 14644，正是全球公认的洁净室及相关受控环境的国际标准系列。

The 2019 edition represents the first major revision of this standard in over a decade. It revised numerous test methods, deleted outdated ones, and introduced new testing items to keep pace with technological developments and engineering experience. The standard structures its tests into two main categories: air cleanliness tests and supporting performance tests. It is a multi-part series

Detects air leakage in specialized systems like isolators, glove boxes, and biosafety cabinets.

Testing in three states: As-built, At-rest, and Operational.

The ISO 14644 family of standards is the global benchmark for cleanrooms and associated controlled environments. It is a multi-part series, with each part addressing a specific aspect of cleanroom technology.