EN ISO 11177:2019

Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply - Quality requirements and testing (ISO 11177:2019)

This document specifies the requirements for product quality and product testing of enamelled valves and pressure pipe fittings for untreated and potable water supply.
It does not apply to chemical service glass-enamel and apparatus enamel.

Emails und Emaillierungen - Innen- und außenemaillierte Armaturen und Druckrohrformstücke für die Roh- und Trinkwasserversorgung - Qualitätsanforderungen und Prüfung (ISO 11177:2019)

Dieses Dokument legt die Anforderungen an die Produktqualität sowie die Produktprüfung von emaillierten Armaturen und Druckrohrformstücken in der Roh  und Trinkwasserversorgung fest.
Es gilt nicht für Chemie  und Apparateemails.

Émaux vitrifiés - Robinetterie et raccords de tuyauterie pour conduites forcées émaillés à l’intérieur et à l’extérieur destinés à l’alimentation en eau non traitée et en eau potable - Exigences de qualité et essais (ISO 11177:2018)

Le présent document spécifie les exigences quant à la qualité et aux essais des produits de robinetterie et raccords de tuyauterie pour conduites forcées émaillés destinés à l'alimentation en eau non traitée et en eau potable.
Il ne s'applique pas aux émaux vitrifiés et émaux d'appareillage destinés à une utilisation chimique.

Steklasti in porcelanski emajli - Znotraj in zunaj emajlirani ventili in tlačni cevni fitingi za nepitno in pitno vodo - Zahteve za kakovost in preskušanje (ISO 11177:2019)

Ta dokument določa zahteve za kakovost in preskušanje izdelka za emajlirane ventile ter tlačne cevne fitinge za nepitno in pitno vodo.
Ne uporablja se za kemično obdelavo steklastih emajlov in emajliranih aparatov.

General Information

• Status: Published
• Publication Date: 16-Apr-2019
• Withdrawal Date: 30-Oct-2019
• ICS: 25.220.50 - Enamels
• ICS: 91.140.60 - Water supply systems
• Technical Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Drafting Committee: CEN/TC 262/WG 5 - Vitreous enamel coatings
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 17-Apr-2019
• Completion Date: 17-Apr-2019
• Ref Project: SIST EN ISO 11177:2019 - Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply - Quality requirements and testing (ISO 11177:2019)

Relations

• Replaces: EN ISO 11177:2016 - Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply - Quality requirements and testing (ISO 11177:2016)
• Effective Date: 24-Apr-2019
• Revised: prEN ISO 11177 - Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply - Quality requirements and testing (ISO/DIS 11177:2025)
• Effective Date: 05-Feb-2025

Overview

EN ISO 11177:2019 (CEN endorsement of ISO 11177:2019) sets product quality requirements and testing procedures for vitreous and porcelain enamels applied to the inside and outside of valves and pressure pipe fittings used in untreated and potable water supply. It defines the acceptable enamel surface quality, coating thickness, mechanical and chemical resistance tests, and reporting expectations. The standard does not apply to chemical-service glass-enamels or apparatus enamel.

Key topics and technical requirements

• Scope & applicability
  • Covers enamelled valves and pressure pipe fittings for potable and untreated water systems.
  • Sampling to be agreed contractually between buyer and supplier.
• Surface quality
  • Enamelling must be uniform and smooth; sealing surfaces must preserve seal performance.
  • Isolated pores acceptable if ≤ 1 mm and no more than seven pores on a ~35 mm diameter surface segment.
• Coat thickness
  • Measured per ISO 2178 (magnetic method).
  • Flat surfaces: 200–600 µm; edges, undercuts and ridges: minimum 150 µm.
• Hardness
  • Surface scratch hardness per EN 15771 (Mohs scale): ≥ 4.
• Thermal shock
  • Tested per ISO 13807 with a temperature difference of 200 K and water cooling; no visible defects allowed after test.
• Corrosion & chemical resistance
  • Water/steam resistance per ISO 28706-2; no blistering, partial delamination or pitting permitted.
  • Includes tests for resistance to citric acid, acid soil, sub-surface migration after impact, scratch and abrasion damage, and resistance to climatic exposure/UV.
• Other
  • Physiological harmlessness assessment and a formal test report detailing methods and results are required.

Practical applications and users

EN ISO 11177:2019 is essential for:

• Manufacturers of enamelled valves and pressure pipe fittings ensuring compliance with quality and durability requirements.
• Testing laboratories performing accredited enamel tests (abrasion, scratch, corrosion, thermal shock, UV).
• Water utilities and municipalities specifying fittings for potable water networks.
• Procurement and quality assurance teams writing technical specifications and acceptance criteria.
• Engineers and consultants advising on material selection for long-term corrosion resistance in water systems.

Related standards

Normative references and related test methods commonly used alongside EN ISO 11177:2019:

• ISO 2178, ISO 6370-1/2, ISO 13807, ISO 15695, ISO 16474-1/2, ISO 28706-1/2
• EN 15771 (Mohs hardness), DIN 50929-3

Using EN ISO 11177:2019 helps ensure enamelled pipeline components meet recognized quality, durability, and health-safety expectations for potable water infrastructure.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN ISO 11177:2016
Steklasti in porcelanski emajli - Znotraj in zunaj emajlirani ventili in tlačni cevni
fitingi za nepitno in pitno vodo - Zahteve za kakovost in preskušanje (ISO
11177:2019)
Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe
fittings for untreated and potable water supply - Quality requirements and testing (ISO
11177:2019)
Emails und Emaillierungen - Innen- und außenemaillierte Armaturen und
Druckrohrformstücke für die Roh- und Trinkwasserversorgung - Qualitätsanforderungen
und Prüfung (ISO 11177:2019)
Émaux vitrifiés - Robinetterie et raccords de tuyauterie pour conduites forcées émaillés à
l’intérieur et à l’extérieur destinés à l’alimentation en eau non traitée et en eau potable -
Exigences de qualité et essais (ISO 11177:2018)
Ta slovenski standard je istoveten z: EN ISO 11177:2019
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
25.220.50 Emajlne prevleke Enamels
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11177
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 25.220.50; 91.140.60 Supersedes EN ISO 11177:2016
English Version
Vitreous and porcelain enamels - Inside and outside
enamelled valves and pressure pipe fittings for untreated
and potable water supply - Quality requirements and
testing (ISO 11177:2019)
Émaux vitrifiés - Robinetterie et raccords de tuyauterie Emails und Emaillierungen - Innen- und
pour conduites forcées émaillés à l'intérieur et à außenemaillierte Armaturen und
l'extérieur destinés à l'alimentation en eau non traitée Druckrohrformstücke für die Roh- und
et en eau potable - Exigences de qualité et essais (ISO Trinkwasserversorgung - Qualitätsanforderungen und
11177:2018) Prüfung (ISO 11177:2019)
This European Standard was approved by CEN on 21 March 2019.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11177:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11177:2019) has been prepared by Technical Committee ISO/TC 107 "Metallic
and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
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 2019, and conflicting national standards shall
be withdrawn at the latest by October 2019.
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 ISO 11177:2016.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 11177:2019 has been approved by CEN as EN ISO 11177:2019 without any modification.

INTERNATIONAL ISO
STANDARD 11177
Second edition
2019-03
Vitreous and porcelain enamels —
Inside and outside enamelled
valves and pressure pipe fittings for
untreated and potable water supply —
Quality requirements and testing
Émaux vitrifiés — Robinetterie et raccords de tuyauterie pour
conduites forcées émaillés à l’intérieur et à l’extérieur destinés à
l’alimentation en eau non traitée et en eau potable — Exigences de
qualité et essais
Reference number
ISO 11177:2019(E)
©
ISO 2019
ISO 11177:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
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Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

ISO 11177:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Sampling . 2
5 Quality requirements and testing procedures . 2
5.1 Enamelling surface quality . 2
5.2 Coat thickness . 2
5.3 Hardness . 2
5.4 Resistance to thermal shock . 2
5.5 Corrosion resistance to water and steam . 3
5.6 Corrosion resistance to citric acid . 3
5.7 Corrosion and chemical resistance to acid soil . 3
5.8 Corrosion and chemical resistance to sub-surface migration of enamel after impact test . 3
5.9 Corrosion resistance after scratch damage . 4
5.10 Corrosion resistance after abrasion damage . 4
5.11 Resistance to climatic exposure and ultraviolet radiation . 4
5.12 Physiological harmlessness . 4
6 Test report . 5
ISO 11177:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights ide
...