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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July Number of pages: Results which do not meet these criteria or which do not cover at least all the parameters listed in table 1 are not suitable and shall be discarded.

Gilt in Verbindung mit DIN The parameters listed in table 1 are to be known when evaluating their influence on changes in drinking water quality due to the presence of corrosion products, particularly as regards the suitability of the water for human consumption. These values relate to samples representative of the average water consumption over the period of a week. ISO general purpose metric screw threads – Tolerances – Part 1: If so, the water is to be assessed as specified therein.

In domestic systems, the flow rate varies greatly and the water remains stagnant for prolonged periods, preventing the formation of protective layers of scale. Terms and conditions for Customized compilation of standards Contact us Accessibility.

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

Unlike corrosion damage to components, corrosion damage to the water itself cannot generally be ein by making alterations to operating conditions or changing waterrelated parameters. Select the first category of products searched and follow the instructions.

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There are no limitations for the use of small pipe and valve components 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.

Corrosion of metals – Corrosion of metallic materials under corrosion load by water inside of pipes, tanks and apparatus – Part 6: This clause gives information on the suitability of various materials based don water-related parameters without making reference to specific test results. Beaulier Date of publication: April Number of pages: Determination of corrosion attack in indoor atmospheres. When assessing water whose composition changes over time, time series data are more significant than maximum and minimum values.

In accordance with the sampling schedule specified in DINin which stagnation times alternate with short phases during which the water flows, samples of water conveyed in systems containing materials which tend to form scale are to be taken after stagnation times ranging from 0,5 hours to 16 hours, with eight samples making up a sampling interval, T.

For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated vin it by amendment or revision.

DIN series is not to be used to prepare food. DIN October Guidance on the assessment of corrosion likelihood in water distribution and storage systems.

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Where system components are of stainless steel, three samples are to be taken after stagnation times of 16, 36 and 72 hours, with the three results making up one sampling interval.

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If the conditions of equation 6 are met within n weeks for materials which tend to form scale, then testing may be dispensed with after 26 weeks, where longer testing is not required for other reasons cf. Changes to water quality may only be made using the additives listed in the Trinkwasserverordnung, and the dkn values listed there are not to be exceeded. The mean of the results, M Tis then to be taken. Changes due to corrosion are largely determined by the length of time the water stagnates and the age of the installation.

There is no evidence that the release of corrosion products from nickel coatings is influenced by the introduction of inhibitors. Therefore, unprotected unalloyed or low-alloy ferrous materials are not to be used in such systems. Copper and copper alloys – Plumbing fittings – Part 5090 A change in water quality due to interaction with a material is considered as corrosion damage if the drinking water no longer meets legal requirements as a result.

For undated references, the latest edition of the publication referred to applies. For Cu-Ni alloys, see subclause 8.

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. Influencing factors for stainless steels. Poirier Date of publication: The requirements dkn the Trinkwasserverordnung are deemed to be fulfilled i.