What is the minimum duct piping cross-sectional area for ASD piping from the exhaust point?

The minimum duct piping cross-sectional area for Air Sparging and Dual-Phase Extraction (ASD) systems is determined based on the system's capability to effectively handle the airflow, which is crucial for efficient operation. A 3-inch inner diameter (ID) pipe is typically recognized as the standard minimum size for allowing adequate airflow needed to achieve effective mitigation and treatment of contaminants. This size balances the airflow velocity and the volume needed for efficient extraction without causing excessive friction losses that could impede system performance.

Selecting a pipe diameter smaller than 3 inches could restrict airflow, potentially leading to inadequate system performance and reduced efficiency in removing contaminants. Therefore, the choice of a 3-inch ID pipe ensures that the system can achieve the necessary flow rates and maintain effective air movement for optimal remediation results. This standardization also helps in ensuring consistency in installation practices and system reliability across various mitigation projects.