【国外标准】 Standard Specification for Reclaimed Perchloroethylene

This specification establishes the requirements for reclaimed perchloroethylene typically needed in various industries for noncritical applications such as in metal cleaning formulations. This is not recommended for dry cleaning applications, but may be used as a reference document by purchasers or by persons establishing in-house perchloroethylene recovery programs. Covered here are the following types: Type I, generally recognized for use in precision applications; Type II, used for less demanding precision applications; and Type III, general purpose technical grade. Specimens shall be tested and each type should conform individually to the following properties: specific gravity; maximum compositions for chlorides, nonvolatile residue, water, and 1,1,1-trichloroethane; assay weight; color (Pt-Co scale); appearance; acid acceptance (as NaOH); and acidity (as HCl).1.1 This specification covers the grade of perchloroethylene typically needed in various industries for noncritical applications, such as in metal cleaning formulations. It is not recommended for dry cleaning applications (see Specification D4081). It may be used as a reference document by purchasers or by persons establishing in-house perchloroethylene recovery programs.1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.