Achieving Clean Steam Quality and Purity
By William F. Harfst
BACTERIA BOILERS MATERIALS OF CONSTRUCTION MICROBIALS PHARMACEUTICALS PURIFIED WATER STAINLESS STEEL STANDARDS STEAM USP WATER FOR INJECTION ENDOTOXINS
Abstract
Clean steam is a general term that applies to steam that is used in the pharmaceutical industry in processes where the steam comes into contact with the product, and thereby may cause contamination. This is primarily in the areas of steam sterilization, but may also apply where steam is used for humidification in clean rooms, or critical care areas in a hospital. The term モclean steamヤ is used in the food industry to describe steam that comes into direct contact with food or milk products. This steam quality differs from that in the pharmaceutical industry. It is often called モculinaryヤ, or モfood-gradeヤ steam to highlight its distinction from モclean steamヤ, although the terms are often used indiscriminately. Food grade steam specifications are sometimes used to define steam that is suitable for use in sterilizers and direct humidification systems. High-purity steam is required in utility applications where the steam is used to drive turbines. Turbine manufacturers publish guidelines for steam purity and quality that are intended to ensure trouble-free turbine operation.
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