ASTM D4051 Standard Practice for Preparation of Low-Pressure Gas Blends
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ASTM International
Standard Practice for Preparation of Low-Pressure Gas Blends
N D4051
Annotation
This practice covers a laboratory procedure for the preparation of low-pressure multicomponent gas blends. The technique is applicable to the blending of components at percent levels and can be extended to lower concentrations by performing dilutions of a previously prepared base blend. The maximum blend pressure obtainable is dependent upon the range of the manometer used, but ordinarily is about 101 kPa (760 mm Hg). Components must not be condensable at the maximum blend pressure.
The possible presence of small leaks in the manifold blending system will preclude applicability of the method to blends containing part per million concentrations of oxygen or nitrogen.
This practice is restricted to those compounds that do not react with each other, the manifold, or the blend cylinder.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
*A Summary of Changes section appears at the end of this standard.
Автоматический перевод:
Общепринятая практика для подготовки смесей газа Низкого Давления
Эта практика покрывает лабораторную процедуру подготовки низкого давления многокомпонентные газовые смеси. Техника применима к смешиванию компонентов на уровнях процента и может быть расширена, чтобы понизить концентрации, выполнив растворения ранее подготовленной основной смеси. Максимальное доступное давление смеси зависит от диапазона используемого манометра, но обычно составляет приблизительно 101 кПа (760-миллиметровый Hg). Компоненты не должны быть конденсируемыми при максимальном давлении смеси.



