Author : I. Hoyer
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128088893
Total Pages : 28 pages
Book Rating : 4.1/5 (28 download)
Book Synopsis Advances in brazing by : I. Hoyer
Download or read book Advances in brazing written by I. Hoyer and published by Elsevier Inc. Chapters. This book was released on 2013-03-04 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The amendment of the Drinking Water Directive has reduced the permissible nickel ion content in drinking water from 50μg/l to 20μg/l. The development of draft standards has begun on a European level so that national standards can be adjusted and transformed to meet European and international standards. For example, DIN EN 15664-1, valid since June 2008, regulates the influence of metallic materials on water intended for human consumption. Since heat exchangers joined with nickel-based filler metals are applied in the equipment for drinking water systems, there is a possible risk of exceeding the limits for nickel ions. So far, components joined with nickelbased filler metals have been applied according to the 5% rule defined in DIN 50930-6. Under the present circumstances, the ban on nickel-based filler metals as a result of the amendment of the Drinking Water Directive will cause severe economic losses for the suppliers of solders as well as for customers. Nickelbased filler metals have not yet been included in the list of harmless materials. Investigations on the release of nickel ions into drinking water carried out according to DIN EN 15664-1 are presented. These investigations are one step forward for the inclusion of nickel-based filler metals in the list of harmless materials. Further measures, which will also be reported in this contribution, have to be taken.
