Cleanliness and good housekeeping

Cleanliness and good housekeeping in machine shops do much to avoid bacterial infection, and their importance cannot be overstressed. Various techniques such as heat treatment, centrifuging and filtration can be used to advantage, although economic considerations may restrict their use to systems containing large volumes of soluble oil. Chemical sterilization with bactericides can be more convenient. 

Finally, plant cleanliness and good housekeeping should be evident during all modes of operation including shutdown mode. A programme of foreign material exclusion should be implemented and monitored. 

Hydrogen peroxide and peroxycarboxylic acids (RCO3H) are normally relatively stable, but as mentioned above they can be rendered unstable by a wide variety of contaminants, particularly at excessively high temperatures. Cleanliness, good housekeeping and proper storage are therefore essential. The major contaminants that cause decomposition are combustible organic materials (e.g. cotton, wool, paper) or metals, particularly transition metals and their salts (Table 1.7).50 Alcohol thermometers or stainless steel thermocouples... 

Safe processing of plastics is essentially a question of good housekeeping good working conditions, cleanliness, ventilation, sensible plant layout, and suitable protective clothing ... 

Ensure that any workshop under his control is safe and healthy and that proper means of access and egress are maintained, particularly in respect of high standards of housekeeping, cleanliness, disposal of rubbish and the stacking of goods in the proper place. 

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