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cleam steam 系統驗證

#1
QA呆呆 發表於 2020 / 02 / 17
請問潔淨蒸汽系統物理性分析及化學性分析的取樣必須是同一個取樣管路嗎?
管理員回覆
純蒸氣取樣針對物理性質 (steam quality) 有取樣點的指導原則,應以最接近待測的消毒鍋的位置為原則 ,請參考附件的圖面說明。至於"化學性質"取樣點 (冷凝後的蒸餾水水質,包括導電度、生菌數、熱源等),並沒有特別規定;但取樣應依照原始設定,固定取樣一點或多點。法規上並無規定兩者需要在同一點。

參考資料:
Water as an insulator
In addition to the risk of wet loads, water can act as an insulator and prevent good heat transfer to component surfaces causing locations that are slow to heat. A static film of water 1-mm thick is equivalent to a layer of copper 500 - 600 mm thick. Obviously the effects of turbulence and convection reduce the impact, but in any event standing water should be avoided by correct loading techniques.
Sample point location
It should be noted that in EN 285 the measurement point for the dryness value test is not defined. If we use the combination of HTM 2010 and standard UK hospital design practices for guidance, it will be seen that the sample point is assumed to be located as shown in Figure 2. This assumes a further 2 Bar pressure drop will occur after the sample point, before the steam enters the chamber and that a steam separator will be fitted to the sterilizer. Given that a pressure drop will tend to improve the dryness of steam, these design aspects must be taken into consideration when conducting dryness value tests and interpreting the results. The ability to maintain the limits in the standards need not be a guarantee of dry loads and should be used as guidance and corrected if the conditions at the sample point differ from that shown in Figure 2.



From TPDA
2020/2/27

 

 

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