The report explains that in a trickle sterilization scenario, the reliance on convective heat transfer is reduced compared to turbulent flow. Therefore, the document emphasizes:
Pharmaceutical water systems (Purified Water, Water for Injection) require routine sanitization to control biofilm and microbial proliferation. The industry standard for thermal sanitization typically involves heating the water to 80°C or higher and circulating it at high velocities (turbulent flow, Reynolds number > 10,000) to ensure uniform temperature distribution and heat penetration to all wetted surfaces. pda technical report 82
Since its release, TR 82 has become a recognized standard by major health authorities, including the EMA. However, as of 2024–2025, there are ongoing industry efforts and PDA conferences focused on revising the report to address new data on the clinical relevance of LER and the effectiveness of different endotoxin types. Technical Report No. 82 "Low Endotoxin Recovery" The report explains that in a trickle sterilization