1、BSI Standards PublicationBS EN ISO 11177:2016Vitreous and porcelainenamels Inside and outsideenamelled valves and pressurepipe fittings for untreatedand potable water supply Quality requirements andtesting (ISO 11177:2016)BS EN ISO 11177:2016 BRITISH STANDARDNational forewordThis British Standard is
2、 the UK implementation of EN ISO11177:2016.The UK participation in its preparation was entrusted to TechnicalCommittee STI/36, Vitreous enamel coatings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all th
3、e necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 83084 6ICS 25.220.50; 91.140.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit
4、ish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2016.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11177 March 2016 ICS 25.220.50; 91.140.60 English Version Vitreous and porcelain
5、 enamels - Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply - Quality requirements and testing (ISO 11177:2016) maux vitrifis - Robinetterie maille lintrieur et lextrieur et raccords de tuyauterie pour conduites forces destines lalimentation en ea
6、u non traite et en eau potable - Exigences de qualit et essais (ISO 11177:2016) Emails und Emaillierungen - Innen- und auenemaillierte Armaturen und Druckrohrformstcke fr die Roh- und Trinkwasserversorgung - Qualittsanforderungen und Prfung (ISO 11177:2016) This European Standard was approved by CEN
7、 on 23 January 2016. 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
8、 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 notifi
9、ed 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, Icel
10、and, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Manag
11、ement Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11177:2016 EBS EN ISO 11177:2016EN ISO 11177:2016 (E) 3 European foreword This document (EN ISO 11177:2016) has been prepared
12、by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 107 “Metallic and other inorganic coatings”. This European Standard shall be given the status of a national standard, either by publicat
13、ion of an identical text or by endorsement, at the latest by September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC
14、 shall not be held responsible for identifying any or all such patent rights. 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,
15、 Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorseme
16、nt notice The text of ISO 11177:2016 has been approved by CEN as EN ISO 11177:2016 without any modification. BS EN ISO 11177:2016ISO 11177:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Sampling 25 Quality requirements and testing procedures 25.1 Enam
17、elling surface quality . 25.2 Coat thickness 25.3 Hardness . 25.4 Resistance to thermal shock 25.5 Corrosion resistance to water and steam 25.6 Corrosion resistance to citric acid 35.7 Corrosion and chemical resistance to acid soil . 35.8 Corrosion and chemical resistance to sub-surface migration of
18、 enamel after impact test . 35.9 Corrosion resistance after scratch damage 35.10 Corrosion resistance after abrasion damage 45.11 Resistance to climatic exposure and ultraviolet radiation 45.12 Physiological harmlessness . 46 Test report . 4Bibliography 6 ISO 2016 All rights reserved iiiContents Pag
19、eBS EN ISO 11177:2016ISO 11177:2016(E)ForewordISO (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
20、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 Electrotech
21、nical 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 d
22、ocuments 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 respon
23、sible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given f
24、or the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following UR
25、L: Foreword - Supplementary informationISO 11177 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 262, Metallic and other inorganic coatings, in collaboration with Technical Committee ISO/TC 107, Metallic and other inorganic coatings, in accordance with the
26、 Agreement on technical cooperation between ISO and CEN (Vienna Agreement).iv ISO 2016 All rights reservedBS EN ISO 11177:2016ISO 11177:2016(E)IntroductionThe requirements defined in this International Standard regarding the product quality of enamelled valves and pressure pipe fittings for untreate
27、d and potable water supply take into account the real stress conditions to which a component can be subjected in the course of its operating life. Typical types of stress are: during storage: climate, UV radiation, mechanical stress; during transportation: mechanical stress e.g. at certain points (i
28、mpact), laterally (friction); during preparation for installation: cleaning agents, mechanical stress e.g. at certain points (impact), laterally (friction); during installation: mechanical stress; during operation: abrasion caused by the carried medium, corrosion from surrounding medium, mechanical
29、stress from shifting ground loads, UV radiation with valves built in above ground. ISO 2016 All rights reserved vBS EN ISO 11177:2016BS EN ISO 11177:2016Vitreous and porcelain enamels Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply Quality requir
30、ements and testing1 ScopeThis International Standard specifies the requirements for product quality and product testing of enamelled valves and pressure pipe fittings for untreated and potable water supply. It is not applicable for chemical service glass-enamel and apparatus enamel.2 Normative refer
31、encesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO
32、 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic methodISO 6370-1, Vitreous and porcelain enamels Determination of the resistance to abrasion Part 1: Abrasion testing apparatusISO 6370-2, Vitreous and porcelain enamels Determination of the resistance to a
33、brasion Part 2: Loss in mass after sub-surface abrasionISO 16474-1, Paints and varnishes Methods of exposure to laboratory light sources Part 1: General guidanceISO 16474-2, Paints and varnishes Methods of exposure to laboratory light sources Part 2: Xenon-arc lampsISO 13807, Vitreous and porcelain
34、enamels Determination of crack formation temperature in the thermal shock testing of enamels for the chemical industryISO 15695, Vitreous and porcelain enamels Determination of scratch resistance of enamel finishesISO 28706-2, Vitreous and porcelain enamels Determination of resistance to chemical co
35、rrosion Part 2: Determination of resistance to chemical corrosion by boiling acids, boiling neutral liquids and/or their vapoursEN 15771, Vitreous and porcelain enamels Determination of surface scratch hardness according to the Mohs scaleDIN 50929-3, Corrosion of metals Probability of corrosion of m
36、etallic materials when subject to corrosion from the outside Buried and underwater pipelines and structural components3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1poredefect in the enamel coat passed through from the base materialINTERNATIONA
37、L STANDARD ISO 11177:2016(E) ISO 2016 All rights reserved 1BS EN ISO 11177:2016ISO 11177:2016(E)3.2corrosionreaction of a material with its environment causing a measurable change in the material which can lead to impaired function of a component or a complete system3.3sub-surface migrationtype of c
38、orrosion whereby the attack progresses underneath the protective layer parallel to the surface which can lead to separation of the protective layer from the base material4 SamplingSampling shall be agreed between contractual partners.5 Quality requirements and testing procedures5.1 Enamelling surfac
39、e qualityThe enamelling shall be uniform and smooth and carried out in such a way on the sealing surfaces that the seal effect is not impaired.Slight variations in colour on edges and ridge areas do not impair product quality and are acceptable.Isolated pores are acceptable provided the dimension of
40、 an individual pore does not exceed 1 mm and that no more than 7 pores are visible on a surface segment with a diameter of approximately 35 mm.5.2 Coat thicknessThe measurement of coat thickness shall be carried out using a calibrated test system in accordance with ISO 2178.On flat surfaces, coat th
41、ickness shall lie between 200 m and 600 m. In edge, undercut and ridge areas etc., the coat thickness shall be at least 150 m.5.3 HardnessSurface hardness shall be determined as surface scratch hardness in accordance with the Mohs scale in accordance with EN 15771. The surface scratch hardness shall
42、 be 4.5.4 Resistance to thermal shockTesting resistance to thermal shock shall be carried out in accordance with ISO 13807 on enamelled cast-iron samples, however a temperature difference of 200 K and cooling (off) in water at room temperature shall be adopted.After the testing, the enamelling shall
43、 not exhibit any visible defects.5.5 Corrosion resistance to water and steamThe testing shall be carried out in accordance with ISO 28706-2.Afterwards the dried surface shall be visually checked.A significant change to the surface quality caused by blistering, partial delamination or pitting due to
44、exposure to water or steam is not permitted. A loss of shine is insignificant.2 ISO 2016 All rights reservedBS EN ISO 11177:2016ISO 11177:2016(E)5.6 Corrosion resistance to citric acidThe enamelling shall be resistant to citric acid in accordance with ISO 28706-2.5.7 Corrosion and chemical resistanc
45、e to acid soilRequirements for corrosion resistance of the exterior coating (sheathing) to very aggressive soils with a soil assessment value B0or B1, less than 10, in accordance with DIN 50929-3 (equivalent to soil Class lll in accordance with DIN 50929-3) shall be met.The testing shall be carried
46、out in a watery solution equivalent to soil Class lll in accordance with DIN 50929-3 (pH = 4, 400 mmol/kg sodium chloride, 400 mmol/kg sodium sulfate) at room temperature over a period of six months.A further test shall to be carried out in very aggressive moist soil (less than 20 % water by weight)
47、 in accordance with DIN 50929-3 over a period of six months outdoors. The soil shall be composed of the following: 80 % topsoil; 10 % peat; 40,6 mmol/kg Epsom salt; 10 % water by weight; citric acid to adjust the pH value of the soil to 3,5.The dried surface shall be checked visually for loss of shi
48、ne and corrosion. There shall not be any visible defects.5.8 Corrosion and chemical resistance to sub-surface migration of enamel after impact testThe sample shall be deliberately damaged by means of an impact test (test with a falling weight).The following test conditions shall be adhered to: drop
49、height of falling weight 300 mm; mass of falling weight 0,2 kg; material of falling weight e.g. tool steel 1.2210; hardness of falling weight 60 HRC; point of falling weight 60, point radius 1 mm.Subsequent to the impact test, the sample shall be placed in deionized water at a temperature of 80 C for three days.The damaged section shall not show any visible defects (crack extension, further flaking) for 24 h after the test.If there is no visible damage after the vertical shock
