DIN 50930 6 PDF

Buy DIN CORROSION OF METALS – CORROSION OF METALLIC MATERIALS UNDER CORROSION LOAD BY WATER. As the effect of metallic materials on the quality of drinking water is not covered by these standards, DIN has been introduced at the. DIN October Corrosion of metals – Corrosion of metallic materials under corrosion load by water inside of pipes, tanks and apparatus – Part 6.

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Systems are to be assessed on the basis of data obtained when carrying out tests as in DIN on pipes of small nominal sizes, taking not only the time periods described in subclause 7. Results which do not meet these criteria or which do not cover at least all the parameters listed in table di are not suitable and shall be discarded. Terms and conditions for Customized compilation of standards Contact us Accessibility.

When this happens, however, corrosion products in dissolved or solid form are released into the drinking water. This standard describes the influence of material characteristics, water-related parameters and operating conditions on the quality of drinking water in contact with metallic materials used in water supply systems, particularly where corrosion products are relevant to water quality, and where limit values are specified in the Trinkwasserverordnung.

In this case sampling is to be performed at intervals of 4 weeks and 12 weeks after commissioning.

Therefore, unprotected unalloyed or low-alloy ferrous materials are not to be used in such systems. Testing of pipes shall be carried out on at least three test assemblies made of size DN 15 pipes, and that of valves shall be performed on at least five specimens.

In case of doubt, the Ddin original should be consulted as the authoritative text.

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Where phosphorus and silicon compounds are fed 5093, the phosphorus and silicon contents are to be stated separately. Changes to water quality may only be made using the additives listed in the Trinkwasserverordnung, and the limit values listed there are not to be exceeded. If the water-related requirements of this standard are met, the specifications of the Verordnung zur Novellierung der Trinkwasserverordnung Regulation amending the German drinking water regulation referred to below as the Trinkwasserverordnung may be deemed to have been fulfilled.

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There are no limitations for the use of small pipe and valve components e. Poirier Date of publication: Annex C of DIN Caution the offer 1 user is reserved for a single user, any broadcast even within his company is prohibited.

Criteria are also given here for assessing the suitability of metallic materials for use in water supply systems; these criteria are based on investigations and practical experience.

Guidance 50903 social responsibility. Register online at inter and intra-company training, and certifying dkn, seminars, distance learning. All water parameters which promote surface corrosion also djn the water quality.

DIN (英文版)金属腐蚀管、槽及装置内水造成金属材料腐蚀 第6部 饮用水成分影响_图文_百度文库

Select the first category of products searched and follow the instructions. This will be ensured when the stipulations of the relevant legal provisions are fulfilled. Change in water quality is generally a problem where water stagnates, depending on the materials used in the installation.

If this is not the case, testing shall be carried out cf. These values relate to samples representative of the average water consumption over the period of a week.

Determination of corrosion attack in indoor atmospheres.

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A change in water quality due to interaction with a material is considered as corrosion damage if the vin water no longer meets legal requirements as a result. Protective measures may, however, be taken to prevent damage due to ineffective water treatment or the use of unsuitable 509330. In addition to water-related parameters, consumption behaviour is to be taken into consideration when assessing the suitability of a material for contact with drinking water.

ISO general purpose metric screw threads – Tolerances – Part 1: For this reason, water which remains stagnant e. These changes are due to microbiotic processes, as well as to the materials with which the water is in contact.

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In systems containing hot-dip galvanized ferrous materials, a change in drinking water quality in terms of its suitability for human consumption is deemed acceptable if the following concentrations in the galvanized coating are not exceeded values given as percentages by mass: If the legal requirements for drinking water quality cannot be met in existing systems due to poor water quality, adverse operating conditions or the selection of unsuitable materials, measures can be taken 500930 correct this by treating the water.

Changes due to corrosion are largely determined by the length of time the water stagnates and the age of the installation. Assessments may be made either on the basis of the information given in clause 8 or on the basis of data obtained in dn carried out as specified in DIN Checking the consistency of parameters used to determine calcite saturation e.

The minimum sampling time in this case is 26 weeks for systems of materials which tend to form scale and 12 weeks for stainless steel systems. Table 1 lists the relevant methods of analysis.

Fin there has not been enough experience with Cu-Ni alloys, limits cannot be specified and testing as in DIN is to be carried out. However, it should be noted that solely introducing polyphosphates will increase the release of corrosion products by the above-mentioned materials, and the effectiveness of such measures should be evaluated as specified in subclause 9.

Regulatory update of German Drinking Water Ordinance and Its Effect on Brass Materials

The mean of the results, M Tis then to be taken. Test yourself or your business online.

The properties of the materials used in dn installation, the composition of the water itself, installation design and operating conditions may cause changes to the water quality, which like all comestibles, changes over time, i.

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