1、March 2016 English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.040.60; 25.220.50!%LsS“2418048ww
2、w.din.deDIN EN ISO 28721-4Vitreous and porcelain enamels Glass-lined apparatus for process plants Part 4: Quality requirements for glass-lined flanged steel pipes and flangedsteel fittings (ISO 28721-4:2015);English version EN ISO 28721-4:2015,English translation of DIN EN ISO 28721-4:2016-03Emails
3、und Emaillierungen Emaillierte Apparate fr verfahrenstechnische Anlagen Teil 4: Qualittsanforderungen an Flansch-Rohre und Flansch-Formstcke aus Stahl mit Emaillierung (ISO 28721-4:2015);Englische Fassung EN ISO 28721-4:2015,Englische bersetzung von DIN EN ISO 28721-4:2016-03maux vitrifis Appareils
4、maills pour les installations industrielles Partie 4: Exigences de qualit pour les tubes et raccords brides en acier maill (ISO 28721-4:2015);Version anglaise EN ISO 28721-4:2015,Traduction anglaise de DIN EN ISO 28721-4:2016-03SupersedesDIN EN ISO 28721-4:2013-03www.beuth.deDocument comprises 13 pa
5、gesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.02.16 DIN EN ISO 28721-4:2016-03 2 A comma is used as the decimal marker. National foreword This document (EN ISO 28721-4:2015) has been prepared by Technical Committee ISO/TC 107 “
6、Metallic and other inorganic coatings” in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Te
7、sting), Working Committee NA 062-01-63 AA Prfung von Emails und Emaillierungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 2746 ISO 5817 ISO 8501-1 ISO 12944-5 ISO 28706-2 ISO 28706-4 ISO 28706-5 DIN EN ISO 2746 DIN EN ISO 5817 DIN
8、 EN ISO 8501-1 DIN EN ISO 12944-5 DIN EN ISO 28706-2 DIN EN ISO 28706-4 DIN EN ISO 28706-5 Amendments This standard differs from DIN EN ISO 28721-4:2013-03 as follows: a) Subclause 7.4.5 “Certificates” has been included; b) Clause 8 “Marking” has been revised. Previous editions DIN 2876: 1993-05, 20
9、02-06 DIN EN 15711: 2009-08 DIN EN ISO 28721-4: 2013-03 DIN EN ISO 28721-4:2016-03 3 National Annex NA (informative) Bibliography DIN EN ISO 2746, Vitreous and porcelain enamels High voltage test DIN EN ISO 5817, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
10、excluded) Quality levels for imperfections DIN EN ISO 8501-1, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall remov
11、al of previous coatings DIN EN ISO 12944-5, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 5: Protective paint systems DIN EN ISO 28706-2, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Part 2: Determination of resista
12、nce to chemical corrosion by boiling acids, boiling neutral liquids and/or their vapours DIN EN ISO 28706-4, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Part 4: Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel DIN E
13、N ISO 28706-5, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Part 5: Determination of resistance to chemical corrosion in closed systems DIN EN ISO 28721-4:2016-03 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 28721-4 N
14、ovember 2015 ICS 25.220.50 Supersedes EN ISO 28721-4:2012English Version Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings(ISO 28721-4:2015) maux vitrifis - Appareils maills pour les
15、 installations industrielles - Partie 4: Exigences de qualit pour les tubes et raccords brides en acier maill (ISO 28721-4:2015) Emails und Emaillierungen - Emaillierte Apparate fr verfahrenstechnische Anlagen - Teil 4: Qualittsanforderungen an Flansch-Rohre und Flansch-Formstcke aus Stahl mit Email
16、lierung(ISO 28721-4:2015) This European Standard was approved by CEN on 1 November 2015. 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 lis
17、ts 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
18、 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 Yu
19、goslav 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 andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPE
20、N DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 28721-4:2015 EForeword 41 Scope . 52 Normative references 5
21、3 Terms and definitions . 64 Materials for steel parts 65 Information to be supplied by the purchaser. 66 Requirements 66.1 Requirements for the steel parts . 66.1.1 Welding 66.1.2 Material properties 66.1.3 Surface characteristics 76.1.4 Exterior protection 76.2 Requirements for the glass-lined com
22、ponents . 76.2.1 Surfaces 76.2.2 Enamel defects . 76.2.3 Foreign matter in the enamel 76.2.4 Enamel coating thickness . 86.2.5 Dimensions and tolerances . 86.2.6 Other requirements . 87 Tests and certificates 87.1 General . 87.2 Place of testing 87.3 Testing of the substrate . 87.4 Testing of the gl
23、ass-lined components . 88 Marking 9Contents PageDIN EN ISO 28721-4:2016-03 EN ISO 28721-4:2015 (E) 2European foreword 3European foreword This document (EN ISO 27821-4:2015) has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings“ in collaboration with Technical Com
24、mittee CEN/TC 262 “Metallic and other inorganic coatings” 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 May 2016, and conflicting national standards shal
25、l be withdrawn at the latest by May 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 shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 28721-4:2012
26、. 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, G
27、ermany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 28721-4:2015 has been approved by CEN as EN ISO 28
28、721-4:2015 without any modification. DIN EN ISO 28721-4:2016-03 EN ISO 28721-4:2015 (E) 3 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
29、 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 col
30、laborates 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 appro
31、val 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 su
32、bject of patent rights. ISO shall not be held responsible 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 tra
33、de name used in this document is information given for 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 Te
34、chnical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 107, Metallic and other inorganic coatings.This second edition cancels and replaces the first edition (ISO 28721-4:2010), which has been technically revise
35、d.ISO 28721 consists of the following parts, under the general title Vitreous and porcelain enamels Glass-lined apparatus for process plants: Part 1: Quality requirements for apparatus, components, appliances and accessories Part 2: Designation and specification of resistance to chemical attack and
36、thermal shock Part 3: Thermal shock resistance Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings Part 5: Presentation and characterization of defectsDIN EN ISO 28721-4:2016-03 EN ISO 28721-4:2015 (E) 4 WARNING This part of ISO 28721 calls for the use of subs
37、tances and/or procedures that may be injurious to health if adequate safety measures are not taken. This part of ISO 28721 does not address any health hazards, safety or environmental matters associated with its use. It is the responsibility of the user of this part of ISO 28721 to establish appropr
38、iate health, safety and environmentally acceptable practices and take suitable actions for any national and international regulations. Compliance with this part of ISO 28721 does not in itself confer immunity from legal obligations.1 ScopeThis part of ISO 28721 specifies the quality requirements for
39、 glass-lined flanged steel pipes and flanged steel fittings used for process plants.2 Normative referencesThe 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 und
40、ated references, the latest edition of the referenced document (including any amendments) applies.ISO 2746, Vitreous and porcelain enamels High voltage testISO 5817, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfectionsISO 8
41、501-1, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatingsISO 12944-5, Paints and varnishe
42、s Corrosion protection of steel structures by protective paint systems Part 5: Protective paint systemsISO 28706-2, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Part 2: Determination of resistance to chemical corrosion by boiling acids, boiling neutral liquids and
43、/or their vapoursISO 28706-4, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Part 4: Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vesselISO 28706-5, Vitreous and porcelain enamels Determination of resistance to chemical c
44、orrosion Part 5: Determination of resistance to chemical corrosion in closed systemsEN 1708-1, Welding Basic welded joint details in steel Part 1: Pressurized componentsEN 10204, Metallic products Types of inspection documentsEN 13480-2, Metallic industrial piping Part 2: MaterialsDIN EN ISO 28721-4
45、:2016-03 EN ISO 28721-4:2015 (E) 5 EN 13480-3:2002, Metallic industrial piping Part 3: Design and calculationEN 15826, Vitreous and porcelain enamels TerminologyDIN 2873, Flanged fitting pipes and flanged steel glass lined PN 10 and PN 253 Terms and definitionsFor the purposes of this document, the
46、terms and definitions given in EN 15826 apply.4 Materials for steel partsThe materials to be used shall be selected by the purchaser or the manufacturer in accordance with EN 13480-2; the material chosen shall be suitable for enamelling.Material selections, technical and all other requirements shall
47、 be in accordance with national rules and regulations of the user country and shall be agreed between the interested parties.5 Information to be supplied by the purchaserWhen ordering articles in accordance with this part of ISO 28721, the purchaser shall provide the following information in writing
48、, in, for example, the contract or purchase order, or on engineering drawings:a) a reference to this part of ISO 28721, i.e. ISO 28721-4;b) designation of the dimension standard;c) quantity (number of items);d) materials testing certificates, in accordance with EN 10204 (see 7.1 and 7.3);e) relevant delivery conditions (if applicable).6 Requirements6.1 Requirements for the steel parts6.1.1 Welding6.1.1.1 The pipes and fittings with welding necks shall be
