EN 16058:2012

Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of surface coatings with nickel layers - Long-term test method

This European Standard specifies a procedure to determine the release of nickel from nickel layers or a coating containing nickel on inner surfaces of products which are intended to come into contact with drinking water.

Einfluss metallischer Werkstoffe auf Wasser für den menschlichen Gebrauch - Dynamischer Prüfstandversuch für die Beurteilung von Oberflächenbeschichtungen mit Nickelschichten - Langzeit­Prüfverfahren

Diese Europäische Norm legt ein Verfahren zur Bestimmung der Abgabe von Nickel aus Nickelschichten oder einer nickelhaltigen Beschichtung auf den Innenoberflächen von Produkten fest, die für den Kontakt mit Trinkwasser ) vorgesehen sind.

Influence des matériaux métalliques sur l'eau destinée à la consommation humaine - Banc d'essai dynamique pour l'évaluation des revêtements de surface ayant des couches de nickel - Méthode d'essai à long terme

La présente Norme européenne spécifie un mode opératoire pour déterminer le relargage du nickel à partir de couches de nickel ou d'un revêtement contenant du nickel sur la surface intérieure de produits destinés à entrer en contact avec de l'eau potable1).

Vpliv kovinskih materialov na pripravo pitne vode - Dinamično preskuševališče za ocenjevanje površinskih premazov s plastmi niklja - Dolgoročna preskusna metoda

Ta evropski standard določa postopek za ugotovitev sproščanja niklja iz nikljevih plasti ali premazov, ki vsebujejo nikelj, na notranji površini proizvodov, ki so namenjeni stiku s pitno vodo.

General Information

• Status: Published
• Publication Date: 08-May-2012
• Withdrawal Date: 29-Nov-2012
• ICS: 67.250 - Materials and articles in contact with foodstuffs
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 3 - Effects of materials in contact with drinking water
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 27-Jun-2024
• Completion Date: 14-Apr-2025
• Mandate: M/136 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on construction products in contact with water intended for human consumption
• Ref Project: SIST EN 16058:2012 - Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of surface coatings with nickel layers - Long-term test method

Overview

EN 16058:2012 - published by CEN - specifies a long‑term dynamic rig test method to determine nickel release from nickel layers or coatings containing nickel on surfaces of products intended to contact drinking water. The procedure simulates domestic distribution conditions with alternating flow and stagnation and provides time‑based nickel release data over a 26‑week operation period. It is intended for assessing surface coatings (intentional or incidental nickel films) rather than nickel released from bulk materials.

Key topics and technical requirements

• Test duration: 26 weeks of controlled operation.
• Test rig & samples: Constructed per Annex A; endpoint devices (e.g., taps) tested in five lines (one sample per line); in‑line devices (e.g., valves) tested as 15 samples across at least three lines. A control line made from inert material is required.
• Flow regime and sampling: Alternating flow and stagnation cycles are used; representative water samples are taken after 4 hours stagnation at specified operation periods to build run‑time curves of nickel concentration.
• Environmental parameters: Room temperature (20 ± 5) °C; test water temperature 10–25 °C; flow rate (5 ± 0.5) L/min. Test water supply must sustain ≥1.5 bar.
• Test water quality: Use local drinking water; upstream nickel < 10 µg/L. Parameters pH, conductivity, temperature and dissolved oxygen must be recorded at least four times per day; other water chemistry parameters per EN 15664‑1 Annex C.
• Preconditioning: New rigs require a minimum one‑week conditioning run (dummy lines or free outlets).
• Sampling & analysis: Metal samples must be acidified (pH < 2) for analysis. Short interruptions <3 days permitted, but no sampling for five days after restart.
• Scope limit: Method targets nickel layers or nickel‑containing coatings. For nickel release from bulk materials, EN 15664 series applies.

Applications and who uses it

EN 16058:2012 is used to:

• Evaluate nickel release from chrome‑plated sanitaryware, taps, valves and other water fittings.
• Support product conformity assessment, risk evaluation and regulatory compliance for materials in contact with drinking water.
• Provide test data for manufacturers (plating lines), independent testing laboratories, water utilities, certification bodies and regulators assessing material suitability for potable water systems.

Typical users:

• Manufacturers of sanitary fittings and valves
• Plating and surface‑coating process engineers
• Accredited testing laboratories and conformity assessment bodies
• Water quality engineers and public health regulators

Related standards

• EN 15664‑1:2008 - Dynamic rig test for assessment of metal release (design & operation) - basis for this method
• EN 12502‑1:2004 - Corrosion assessment guidance for water distribution systems
• EN ISO 8044:1999 - Corrosion basic terms and definitions

Keywords: EN 16058:2012, nickel release, drinking water, dynamic rig test, nickel layers, surface coatings, long‑term test method, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HVNXVQDPHWRGDEinfluss metallischer Werkstoffe auf Wasser für den menschlichen Gebrauch - Dynamischer Prüfstandversuch für die Beurteilung von Oberflächenbeschichtungen mit Nickelschichten - Langzeit­PrüfverfahrenInfluence des matériaux métalliques sur l'eau destinée à la consommation humaine - Banc d'essai dynamique pour l'évaluation des revêtements de surface ayant des couches de nickel - Méthode d'essai à long termeInfluence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of surface coatings with nickel layers - Long-term test method67.250Materiali in predmeti v stiku z živiliMaterials and articles in contact with foodstuffs13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 16058:2012SIST EN 16058:2012en,fr,de01-september-2012SIST EN 16058:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16058
May 2012 ICS 67.250 English Version
Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of surface coatings with nickel layers - Long-term test method
Influence des matériaux métalliques sur l'eau destinée à la consommation humaine - Banc d'essai dynamique pour l'évaluation des revêtements de surface ayant des couches de nickel - Méthode d'essai à long terme
Einfluss metallischer Werkstoffe auf Wasser für den menschlichen Gebrauch - Dynamischer Prüfstandversuch für die Beurteilung von Oberflächenbeschichtungen mit Nickelschichten - Langzeit-Prüfverfahren This European Standard was approved by CEN on 13 April 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16058:2012: ESIST EN 16058:2012

Test rig components and assembly  Test rig . 12Annex B (informative)
Example of graphs for expression of results . 14Bibliography . 16 SIST EN 16058:2012

Metal release from the bulk material depends on the composition of the material. The bulk material can release metals for a long period. This long term behaviour depends on the formation of protective layers of corrosion products on the surface of the material. It is possible to test materials to assess their behaviour in releasing metals from the bulk material (EN 15664-1 and -2) so that products made of accepted materials do not have to be tested for this characteristic. The metal release from metal layers due to coating or other production processes depends on the characteristics of those processes. Therefore products must be tested for metal release due to the presence of films or layers on the surface of products. The test method given in this standard is designed to provide information on nickel release over time from surfaces of products having a coating containing nickel which are in contact with drinking water. This nickel coating may be added intentionally or part formed unintentionally i.e. it might appear due to electrostatic conditions in the process. For testing nickel release caused by the bulk material the test procedure according to EN 15664-1 and -2 is required.
This test is based on EN 15664-1, Influence of metallic materials on water intended for human consumption  Dynamic rig test for assessment of metal release  Part 1: Design and operation. It includes alternating periods of once-through flow and stagnation in a rig, simulating the conditions in a domestic distribution system.
For the commonly used chrome plating process of sanitary tap ware, preliminary research indicates that the water composition does not significantly influence the release of nickel from such surface nickel layers. The use of this method in product testing might give more information about the influence of water composition. If this test method is used to measure the release of other metals it must be taken into account that the water composition has a strong influence on the results.
EN 12502-1:2004 and the following apply. 3.1 test rig assembly of a number of test lines and one control line Note 1 to entry: See Clause 5 and Annex A, Figure A.1. 3.2 line for a test rig equipped with end point device products: Continuous part between a check valve and the free outlet(s)
for a test rig equipped with in-line devices products: Continuous part between a check valve and the corresponding flow regulator 3.3
test line line containing one product for end point devices or up to five products for in-line devices 3.4 control line line containing a single length of pipe made on an inert material for the purposes of the test 3.5 dummy line pipe made of an inert material for the purpose of the test used for the conditioning run of a newly built test rig
1) Water intended for human consumption is referred to as "drinking water" and means the same as the definition given at Article 2(1) of the Council Directive 98/83/EC on the quality of water intended for human consumption. Luxembourg, Office for Official Publications of the European Communities. 3 November 1998. SIST EN 16058:2012

3.10 test water water used for testing purposes
Note 1 to entry: See 7.1. 3.11 contact water test water which has been in contact with a te
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