SH3034-2012石油化工给水排水管道设计规范(英文版)
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3.7 Stability Index(Lyzner Index)

A calculated number used to predict the tendency of precipitation or dissolution of calcium carbonate in water using relatively quantitative method.

Note:Stability index is expressed as the difference between 2 times the theoretically calculated pH when water is in equilibrium with calcium carbonate and the actual pH.