UNI EN 15664-1:2026

UNI EN 15664-1:2026 / Influenza dei materiali metallici sull'acqua destinata al consumo umano

ID 26432 | 11 Giugno 2026 / Preview allegata

UNI EN 15664-1:2026
Influenza dei materiali metallici sull'acqua destinata al consumo umano - Prova dinamica in circuito idraulico per la determinazione del rilascio di metalli - Parte 1: Schema costruttivo e conduzione

La norma specifica un procedimento per la determinazione del rilascio di metalli da materiali metallici utilizzati nei prodotti da costruzione in contatto con acqua destinata al consumo umano.

Data entrata in vigore: 11 giugno 2026

Sostituisce: UNI EN 15664-1:2014

Recepisce: EN 15664-1:2026

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EN 15664-1:2026

This document (EN 15664-1:2026) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2026, and conflicting national standards shall be withdrawn at the latest by October 2026.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 15664-1:2008+A1:2013.

This document is one of a series of test methods which support associated product standards. 

This document is Part 1 of a series dealing with the test method to determine the release of metals from metallic products into drinking water comprising:

- Part 1: Design and operation
- Part 2: Test waters

Introduction

The main application of metallic materials in water supply is within the domestic installation. The test method given in this standard is designed to provide information on metal release over time from metallic materials into drinking water.

The test is based on a programme of alternating periods of once-through flow and stagnation in a rig, simulating the conditions in a domestic distribution system.

The test conditions are more relevant than conditions of continuous through-flow or sit and soak tests and are applicable to all metallic materials in distribution systems.

Internal corrosion of metallic products in water conveying systems generally leads to the build-up of layers, which might or might not be protective. The factors influencing corrosion are described in EN 12502-1. Type and rate of the production of corrosion products and the rate of metal release can depend on:

- characteristics of the metallic material;
- characteristics of the water;
- design and construction of the products and the complete system the products are installed in;
- tightness testing and commissioning of the system;
- operating conditions and duration of operation.

Corrosion product layers begin to form as soon as a metallic material comes into contact with water. Their properties depend on the factors noted above and for a given water/material combination especially on the operating conditions. It is not possible to reproduce the conditions of an actual installation in tests by constant once-through flow or circulation of water. The flow regime used in this test simulates the operating conditions in domestic drinking water installations where stagnation times of water considerably exceed the times of through-flow.

An assessment by testing is possible only if the influence of the flow regime and the operation period is taken into consideration. A compilation of data are needed which has been determined under defined conditions over a prolonged period of time. In most cases, metal release decreases with operation time.

For some alloying elements and impurities, however, an increase in their release can be observed.

1 Scope

This document specifies a procedure to determine the release of metals from metallic materials used in products intended to come into contact with drinking water.

The test can be used for three purposes:

a) To assess a material as a reference material for a new category of materials by metal release testing using the results of several investigations in different waters covering a broad range of water compositions.
b) To assess a material for an existing category for approval by way of metal release testing using the water defined in part 2, which exhibited the highest metal release when the reference material of the category was tested.
c) To obtain data on the interaction of local water with a material.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 1484, Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
EN 10088-1, Stainless steels - Part 1: List of stainless steels
EN 12502-1, Protection of metallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems - Part 1: General
EN 25813, Water quality - Determination of dissolved oxygen - Iodometric method (ISO 5813:1983)
EN ISO 5814, Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814)
EN 27888, Water quality - Determination of electrical conductivity (ISO 7888)
EN ISO 6878, Water quality - Determination of phosphorus - Ammonium molybdate spectrometric method (ISO 6878)
EN ISO 8044, Corrosion of metals and alloys - Vocabulary (ISO 8044)
EN ISO 9963-1, Water quality - Determination of alkalinity - Part 1: Determination of total and composite alkalinity (ISO 9963-1)
EN ISO 10304-1, Water quality - Determination of dissolved anions by liquid chromatography of ions - Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate (ISO 10304-1)
EN ISO 11885, Water quality - Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES) (ISO 11885)
EN 13443-1, Water conditioning equipment inside buildings - Mechanical filters - Part 1: Particle rating 80 μm to 150 μm - Requirements for performances, safety and testing
EN ISO 14911, Water quality - Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography - Method for water and waste water (ISO 14911)
EN ISO 15586, Water quality - Determination of trace elements using atomic absorption spectrometry with graphite furnace (ISO 15586)
EN ISO 17294-1, Water quality - Application of inductively coupled plasma mass spectrometry (ICP-MS) - Part 1: General requirements (ISO 17294-1)
EN ISO 17294-2, Water quality - Application of inductively coupled plasma mass spectrometry (ICP-MS) - Part 2: Determination of selected elements including uranium isotopes (ISO 17294-2)
ISO 6058, Water quality - Determination of calcium content - EDTA titrimetric method
ISO 6059, Water quality - Determination of the sum of calcium and magnesium - EDTA titrimetric method
ISO 9297, Water quality - Determination of chloride - Silver nitrate titration with chromate indicator (Mohr's method)
ISO 9964-3, Water quality - Determination of sodium and potassium - Part 3: Determination of sodium and potassium by flame emission spectrometry
ISO 10523, Water quality - Determination of pH

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 8044, EN 12502-1 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

- ISO Online browsing platform: available at https://www.iso.org/obp
- IEC Electropedia: available at https://www.electropedia.org

3.1 metal release testing
test for accepting a material with restricted composition as reference material of a new category or for
accepting a commercial alloy to an existing category

3.2 test rig
assembly of test lines, control lines and where necessary reference lines together with test water inlet
and discharge arrangements (see Annex A, Figure A.1)

3.3 line
continuous part between a check valve and the corresponding flow regulator.

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