1、BSI Standards PublicationBS EN 14901:2014Ductile iron pipes, fittingsand accessories Epoxycoating (heavy duty) of ductileiron fittings and accessories Requirements and testmethodsBS EN 14901:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14901:2014. Itsupe
2、rsedes BS EN 14901:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/10, Iron pipes and fittings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the
3、 necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 85286 2ICS 23.040.10; 23.040.40; 25.220.60Compliance with a British Standard cannot confer immunity fromlegal obligations
4、.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2014.Amendments issued since publicationDate Text affectedBS EN 14901:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14901 October 2014 ICS 23.040.10; 23.040.40; 25.220.60 S
5、upersedes EN 14901:2006English Version Ductile iron pipes, fittings and accessories - Epoxy coating (heavy duty) of ductile iron fittings and accessories - Requirements and test methods Tuyaux, raccords et accessoires en fonte ductile - Revtement poxy (renforc) des raccords et accessoires en fonte d
6、uctile - Prescriptions et mthodes dessai Rohre, Formstcke und Zubehr aus duktilem Gusseisen - Epoxidharzbeschichtung (fr erhhte Beanspruchung) von Formstcken und Zubehrteilen aus duktilem Gusseisen - Anforderungen und Prfverfahren This European Standard was approved by CEN on 28 August 2014. CEN mem
7、bers 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 applicat
8、ion 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 Manage
9、ment 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,
10、 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 Management Centre: Avenue Marnix
11、17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14901:2014 EBS EN 14901:2014EN 14901:2014 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 Order
12、ing information .8 5 Technical Requirements .9 5.1 General 9 5.2 Surface preparation .9 5.3 Appearance and continuity .9 5.4 Adhesion .9 5.5 Coating thickness 9 5.6 Cross linkage .9 5.7 Repairs . 10 5.8 Marking 10 6 Performance requirements 10 6.1 General . 10 6.2 Impact resistance 10 6.3 Indentatio
13、n resistance 10 6.4 Non porosity 10 6.5 Cross linkage 10 6.6 Durability . 11 6.6.1 General . 11 6.6.2 Heat ageing resistance in air . 11 6.6.3 Heat ageing resistance in water 11 6.7 Chemical resistance (only for sewage application) 11 6.8 Abrasion resistance (only for sewage application) . 11 6.9 Ma
14、terials in contact with water intended for human consumption . 11 7 Test Methods . 11 7.1 Routine tests . 11 7.1.1 General . 11 7.1.2 Surface preparation 11 7.1.3 Appearance and continuity 11 7.1.4 Adhesion 11 7.1.5 Coating thickness . 12 7.1.6 Cross linkage 12 7.2 Performance tests. 12 7.2.1 Genera
15、l . 12 7.2.2 Impact resistance 12 7.2.3 Indentation resistance 12 7.2.4 Non porosity 13 7.2.5 Durability . 13 Annex A (informative) Quality assurance 14 A.1 General . 14 A.2 Performance type test, fitting and accessory size grouping . 15 BS EN 14901:2014EN 14901:2014 (E) 3 A.3 Quality assessment sys
16、tem . 15 Annex B (informative) Coating materials and application 16 B.1 General . 16 B.2 Coating application . 16 Annex C (informative) Handling, transportation and storage . 17 C.1 Handling . 17 C.2 Transportation to storage areas 17 C.3 Storage . 17 C.4 Loading of fittings and accessories for deli
17、very . 17 Bibliography 18 BS EN 14901:2014EN 14901:2014 (E) 4 Foreword This document (EN 14901:2014) has been prepared by Technical Committee CEN/TC 203 “Cast iron pipes, fittings and their joints”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a nati
18、onal standard, either by publication of an identical text or by endorsement, at the latest by April 2015 and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent ri
19、ghts. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14901:2006. In comparison with EN 14901:2006, the following changes have been made: correction of several typing errors, wrong units etc.; actualized dates of referenced
20、standards; clearer description of the coating thickness test method (7.1.5); attribution of performance requirements “chemical resistance” and “abrasion resistance” to coatings in sewer applications (Lines 8 and 9 of Table A.1); actualization of the requirement “fitness for contact with potable wate
21、r” according to the present status (line 10 of Table A.1); correction of overlapping nominal sizes at DN grouping (Table A.3). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
22、lgium, 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, Slovakia, Slovenia, Spain, Sweden, Swit
23、zerland, Turkey and the United Kingdom. BS EN 14901:2014EN 14901:2014 (E) 5 Introduction This European Standard is in conformity with the general requirements already established by CEN/TC 164 in the field of water supply (e.g. potable water), CEN/TC 165 in the field of wastewater and CEN/TC 234 in
24、the field of gas distribution. In respect of potential adverse effects on the quality of water intended for human consumption caused by the product covered by this European Standard: 1) this standard provides no information as to whether the product may be used without restriction in any of the memb
25、er states of the EU or EFTA; 2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. BS EN 14901:2014EN 14901:2014 (E) 6 1 Scope This European Standard define
26、s the requirements and test methods for factory applied epoxy coatings (fusion bonded powder or liquid two-pack) used for the corrosion protection of ductile iron fittings and accessories conforming to EN 545, EN 598, EN 969, EN 12842, EN 14525, for: conveying water (e.g. potable water) at operating
27、 temperature up to 50 C excluding frost; or conveying waste water at operating temperature up to 45 C excluding frost; or conveying gas at operating temperature up to 50 C; suitable for external environments, i.e. soils, waters and atmospheres of all common corrosion loads, characterized in EN 545:2
28、010, D.2.3. 2 Normative references The 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 (includi
29、ng any amendments) applies. EN 545:2010, Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test methods EN 598, Ductile iron pipes, fittings, accessories and their joints for sewerage applications - Requirements and test methods EN 805, Water supply -
30、Requirements for systems and components outside buildings EN 969, Ductile iron pipes, fittings, accessories and their joints for gas pipelines - Requirements and test methods EN 12842, Ductile iron fittings for PVC-U or PE piping systems - Requirements and test methods EN 14525, Ductile iron wide to
31、lerance couplings and flange adaptors for use with pipes of different materials: ductile iron, Grey iron, Steel, PVC-U PE, Fibre-cement EN ISO 4624, Paints and varnishes - Pull-off test for adhesion (ISO 4624) EN ISO 8501-1, Preparation of steel substrates before application of paints and related pr
32、oducts - 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 coatings (ISO 8501-1) 3 Terms and definitions For the purposes of this document, the following terms and definitions a
33、pply. 3.1 accessory any casting other than a pipe or fitting which is used in a pipeline: inspection chambers; manholes; glands for mechanical flexible joints; BS EN 14901:2014EN 14901:2014 (E) 7 glands and locking rings for restrained flexible joints; pipe saddles for house connection; adjustable f
34、langes Note 1 to entry: Valves of all types are not covered by the term “accessory“. 3.2 adhesion force per unit area, applied perpendicular to the surface, which is necessary to separate the coating from its substrate 3.3 cross linkage chemical reaction between epoxy resin and hardener to form the
35、final coating 3.4 ductile iron cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal form 3.5 fitting casting other than a pipe or accessory which allows pipeline deviation, change of direction or bore Note 1 to entry: Flanged-socket pieces, flan
36、ged spigot pieces and collars are also classified as fittings. 3.6 impact strength impact energy which a coating can withstand without damage under specific test conditions 3.7 indentation resistance resistance of the coating to the penetration of a punch under defined test conditions 3.8 non porosi
37、ty absence of electrical puncture in a high voltage test under defined test conditions 3.9 epoxy coating factory applied coating with pure epoxy as a binder such as: fusion bonded epoxy powder (P) applied by (electrostatic) spraying or dipping in fluidized bed on preheated parts; two-pack liquid epo
38、xy (L) consisting of a base and a catalyst component which is mixed together in the proportion specified by the manufacturer before use 3.10 chalking superficial reaction of epoxy coatings influenced by UV-radiation Note 1 to entry: The process is stopped by the reaction products at a depth of 2 m t
39、o 5 m, combined with a loss of brilliance. There are no adverse influences on the protection properties. BS EN 14901:2014EN 14901:2014 (E) 8 3.11 performance test test which is done once and is repeated only after change of coating material supplier, coating material or relevant change in process ap
40、plication 3.12 routine test test carried out to control the manufacturing process with a frequency defined by the manufacturer of the coated ductile iron component 3.13 designated zones areas of a casting where because of jointing tolerance restrictions, testing difficulties, or shrouding by a gaske
41、t, etc. a lower standard of coating performance is unavoidable Note 1 to entry: For the purpose of this standard, these areas are defined as: joint areas; bolt holes; permitted markings; ribs; edges. Note 2 to entry: Where considered necessary, these zones may be protected by appropriate additional
42、corrosion protection measures during or after installation. However, such measures are not part of this standard. 3.14 average thickness arithmetic mean of all thickness measurements taken on one coated item 3.15 localized thickness measured thickness at any one point of one coated item 4 Ordering i
43、nformation The following information shall be supplied to the manufacturer by the purchaser: Ductile iron fittings and accessories according to EN 545, EN 598, EN 969, EN 12842 or EN 14525 but coated in accordance with this European Standard shall be specified in the purchasers enquiry and order by
44、reference to this standard: EXAMPLE 10 pieces of ductile iron fitting DN 300 according to EN 545 with external and internal coating according to EN 14901. The purchaser shall stipulate the scope of application. BS EN 14901:2014EN 14901:2014 (E) 9 5 Technical Requirements 5.1 General The following is
45、 applicable: 5.2 Surface preparation Prior to the coating process, the surface to be coated shall be substantially clean and free of oil, grease and moisture. The surface to be coated shall comply at least with the level Sa 2 of EN ISO 8501-1 (see 7.1.2). Blasted fittings and accessories shall only
46、be handled with appropriate tools to prevent surface contamination. 5.3 Appearance and continuity The epoxy coating of the final product shall be of: uniform colour, except for permitted marking; uniform appearance and smoothness, except for admissible repairs; free of visible defects (pinholes, bub
47、bles, blisters, wrinkles, cracks or voids). Slight superficial colour variations due to repairs or prolonged exposure to sunlight (chalking) are permissible (see 7.1.3). Repairs are permitted (see 5.7). As binder only pure epoxy is allowed. 5.4 Adhesion Adhesion shall be tested in accordance with th
48、e test method described in 7.1.4 on production samples (fittings and accessories). The epoxy coating adhesion shall achieve an average value of at least 8 MPa and a minimum single value of 6 MPa. In case of multilayer systems no adhesive failure between the layers is permitted. 5.5 Coating thickness
49、 When measured in accordance with the method defined in 7.1.5, except on designated zones, the localized minimum thickness shall be greater than 200 m and the minimum average thickness shall be equal to or greater than 250 m. For designated zones (see 3.13), localized minimum thickness of 150 m is permissible. 5.6 Cross linkage When tested in accordance with the test method described in 7.1.6, the degree of cross linkage of coated fittings and accessories shall comply with the following: The aspect and colo
