BS EN 937:2009 pdf free.Chemical ls used for treatment of water intended for human consumption—Chlorine.
BS EN 937 This European Standard is applicable to chlorine used for treatment of water intended for human consumption. It describes the characteristics of chlorine and specifies the requirements and the corresponding test methods for chlorine. It gives information on its use in water treatment.
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987)
ISO 1552, Liquid chlorine for industrial use — Method of sampling (for determining only the volumetric chlorine content)
ISO 2120, Liquid chlorine for industrial use — Determination of the content of chlorine by volume in the vaporized product
ISO 2121, Liquid chlorine for industrial use — Determination of water content — Gravimetric method ISO 6206, Chemical products for industrial use — Sampling — Vocabulary.This European Standard specifies the minimum purity requirements for chlorine used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities.
NOTE Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in the product standard.Limits have been given for impurities and chemicals parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user.BS EN 937 pdf download.