Acceptance of Items Which Do Not Meet Specifications

The production and maintenance engineers shall be consulted to see if some of the specifications can be relaxed (without seriously affecting the production rate, product quality equipment life, etc.) in case delivery of the material as per required specification is delayed. 

However, certain impurities are very diflicult to remove prior to feeding the raw material to process plant and they can affect the product quality, e.g. high iron content cannot be accepted in battery grade sulphuric acid and high chloride content in NaOH is not acceptable for rayon manufacture. 

However, if the off-spec raw material can be pre-treated by cleaning, screening, filtering and drying at a reasonable cost before feeding to reactors without adverse effect on the production rate, product quality or equipment life, then such materials may be procured if they are considerably cheaper than the better quality but veiy costly and scarce raw materials. 

The cost of pre-treatment shall include the capital invested in the equipments, cost of operation and maintenance also. 

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