CEN TR 16950-2016 Ductile iron pipes fittings and accessories - Sanitary characteristics and test methods.pdf

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1、PD CEN/TR 16950:2016Ductile iron pipes, fittingsand accessories Sanitarycharacteristics and testmethodsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06PD CEN/TR 16950:2016 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation of CEN/TR16

2、950:2016.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 necessaryprovisions of a contract

3、. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 91966 4ICS 23.040.10; 23.040.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under

4、the authority of theStandards Policy and Strategy Committee on 31 August 2016.Amendments issued since publicationDate Text affectedPD CEN/TR 16950:2016TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16950 July 2016 ICS 23.040.10; 23.040.40 English Version Ductile iron pipes, fittings a

5、nd accessories - Sanitary characteristics and test methods Tuyaux, raccords et accessoires en fonte ductile - Aspects sanitaires et methodes dessais Rohre, Formstcke und Zubehr aus duktilem Gusseisen - Trinkwasserhygienische Eigenschaften und Prfverfahren This Technical Report was approved by CEN on

6、 29 February 2016. It has been drawn up by the Technical Committee CEN/TC 203. 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, Ir

7、eland, 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 Management C

8、entre: 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. CEN/TR 16950:2016 EPD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 2 Contents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative refe

9、rences 6 3 Terms and definitions . 6 4 Test samples . 8 5 Characteristics . 8 5.1 Cement mortar linings of pipes 8 5.1.1 General 8 5.1.2 Organoleptic parameters (flavour and odour, colour and turbidity) 8 5.1.3 Migration 8 5.2 Porous seal coat on cement mortar linings of pipes. 9 5.3 Cement mortar l

10、inings of fittings 9 5.4 Organic linings (except bitumen) . 10 5.4.1 Organoleptic parameters 10 5.4.2 Migration . 10 5.4.3 Enhancement of microbial growth (EMG) . 10 5.5 Bituminous linings for fittings and joint areas 10 5.5.1 Organoleptic parameters 10 5.5.2 Migration . 10 5.5.3 Enhancement of micr

11、obial growth (EMG) . 11 5.6 Enamel coatings and linings . 11 5.6.1 Organoleptic parameters 11 5.6.2 Migration . 11 5.6.3 Enhancement of microbial growth (EMG) . 11 5.7 Rubber gaskets 11 5.7.1 Organoleptic parameters 11 5.7.2 Migration . 12 5.7.3 Chlorine consumption 12 Annex A (informative) National

12、 regulations on sanitary requirements, limit values, positive lists 13 A.1 General . 13 A.2 Austria 13 A.3 Belgium 13 A.4 France . 13 A.5 Germany 13 A.6 Italy 14 A.7 Netherlands 14 A.8 Romania . 14 A.9 Spain . 14 PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 3 A.10 Switzerland . 14 A.11 United Kingdom 1

13、4 Bibliography . 16 PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 4 European foreword This document (CEN/TR 16950:2016) has been prepared by Technical Committee CEN/TC 203 “Cast iron pipes, fittings and their joints”, the secretariat of which is held by AFNOR. Attention is drawn to the possibility that

14、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. PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 5 Introduction This Technical Report is in conformity with the general requirements alr

15、eady established by CEN/TC 164 in the field of water supply (e.g. potable water). This Technical Report contains the essential sanitary characteristics to be verified in performance tests by materials of pipes, fittings, accessories of ductile cast iron and their joints within the scope of this Tech

16、nical Report, which are in contact with water intended for human consumption. In addition, the national regulations of member states apply, including positive lists of substances for organic and inorganic materials. Tests carried out using EN test methods to demonstrate compliance with existing nati

17、onal regulations may be used to show that the sanitary characteristics of pipes, fittings, accessories of ductile cast iron and their joints are verified, e.g. compliance with the sanitary requirements applicable either in F, G, NL or UK ensures compliance with the properties of this Technical Repor

18、t. Since the sanitary requirements of construction products remain in the framework of the national regulations, Annex A of this Technical Report contains a compilation of the different national requirements. PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 6 1 Scope This Technical Report contains the sani

19、tary characteristics and test methods applicable to those factory applied lining-, coating- and jointing materials of ductile iron pipes and fittings conforming to EN 545 that are in contact with water intended for human consumption for use at operating temperatures up to 50 C. Ductile cast iron its

20、elf is not in direct contact with the conveyed water and therefore no characteristics in respect to the sanitary behaviour are necessary. As ductile cast iron is impermeable against diffusion of organic substances, the water quality is maintained in service. Different surface/volume ratios are used

21、in the tests for pipes, fittings and joints to reflect the different impact of their surface areas exposed to the water in the overall pipeline. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.

22、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1420, Influence of organic materials on water intended for human consumption Determination of odour and flavour assessment of water in p

23、iping systems EN 1622, Water quality Determination of the threshold odour number (TON) and threshold flavour number (TFN) EN 12873-1, Influence of materials on water intended for human consumption Influence due to migration Part 1: Test method for factory-made products made from or incorporating org

24、anic or glassy (porcelain/vitreous enamel) materials EN 14718, Influence of organic materials on water intended for human consumption Determination of the chlorine demand Test method EN 14944-1, Influence of cementitious products on water intended for human consumption Test methods Part 1: Influence

25、 of factory made cementitious products on organoleptic parameters EN 14944-3, Influence of cementitious products on water intended for human consumption Test methods Part 3: Migration of substances from factory-made cementititous products EN 16421, Influence of materials on water for human consumpti

26、on Enhancement of microbial growth (EMG) EN ISO 7027-1, Water quality Determination of turbidity Part 1: Quantitative methods (ISO 7027-1) EN ISO 7393-1, Water quality Determination of free chlorine and total chlorine Part 1: Titrimetric method using N, N-diethyl-1,4-phenylenediamine (ISO 7393-1) EN

27、 ISO 7887, Water quality Examination and determination of colour (ISO 7887) EN ISO 14402, Water quality Determination of phenol index by flow analysis (FIA and CFA) (ISO 14402) EN ISO 17993, Water quality Determination of 15 polycyclic aromatic hydrocarbons (PAH) in water by HPLC with fluorescence d

28、etection after liquid-liquid extraction (ISO 17993) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 7 3.1 ductile iron cast iron used for pipes, fittings and accessories in which graphite is present subst

29、antially in spheroidal form Note 1 to entry: Ductile iron is impermeable to diffusion (e.g. contaminated soils). 3.2 cement mortar lining internal coating system for ductile iron pipes and fittings, principally consisting of a blend of cement, sand and water applied to the internal surfaces Note 1 t

30、o entry: It may be applied and hardened by a number of different processes to achieve its desired properties. 3.3 finishing layer layer of an organic varnish or polymeric resin which protects the zinc layer against direct contact with soil components 3.4 porous seal coat layer of an organic varnish

31、or polymeric resin which is intended to reduce the contact between a cement mortar lining and the contents of a water pipeline thereby restricting the leaching of inorganic materials into the water supply 3.5 organic lining internal layer of a polymeric resin which acts as a barrier between the duct

32、ile cast iron and the conveyed water 3.6 organic coating external layer of an organic varnish or polymeric resin which acts as a protection between the ductile cast iron and the soil Note 1 to entry: A small part of this external surface has contact with the conveyed water in the assembled pipeline

33、in the joint area. 3.7 bituminous lining internal layer of a bituminous varnish in fittings or joint areas 3.8 enamel vitreous a smooth, durable coating or lining made of melted and fused glass powder PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 8 3.9 rubber gaskets sealing component of a joint 3.10 lu

34、bricant water-solluble substance that enables an easy assembly by reducing friction in the joint and that dissolves during the commissioning of the pipeline 4 Test samples For pipes, pipe sections where the lining has been produced under standard factory controlled conditions (same materials, same p

35、rocess) are used as test samples. For fittings, pipe sections or sections of straight fittings where the lining has been produced under standard factory controlled conditions (same materials, same process) are used as test samples. For rubber gaskets, rubber plates or gasket sections produced under

36、standard factory controlled conditions (same materials, same process) are used as test samples. 5 Characteristics 5.1 Cement mortar linings of pipes 5.1.1 General As organic free cementitious products, the cement mortar linings have to verify organoleptic and migration properties. 5.1.2 Organoleptic

37、 parameters (flavour and odour, colour and turbidity) When tested in accordance with EN 14944-1, using chlorine-free test water at a fixed S/V of 2,5 dm2/l for pipes and 1,0 dm2/l for fittings, the following properties shall be determined after the third contact period: a) threshold flavour number (

38、TFN) and threshold odour number (TON) according to EN 1622; b) change in colour according to EN ISO 7887 and c) change in turbidity according to EN ISO 7027-1. 5.1.3 Migration When tested in accordance with EN 14944-3, using chlorine-free test water at a fixed S/V of 10 dm2/l, the following properti

39、es shall be determined after the third contact period: a) migration of organics expressed as TOC for pipes and fittings in mg/(m2d); and b) migration of metals; if the cement contains higher metal concentrations than indicated in Table 1, migration rates of metals given in Table 2 shall be determine

40、d. PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 9 Table 1 Maximum metal content of the cement where no migration test is necessary Type of metal Maximum metal content Arsenic (As) 0,01 % Cadmium (Cd) 0,001 % Chromium (Cr) 0,05 % Lead (Pb) 0,05 % Nickel (Ni) 0,05 % Table 2 Migration rates Type of metal

41、max. migration rate Arsenic (As) according to the national regulations Cadmium (Cd) Chromium (Cr) Lead (Pb) Nickel (Ni) 5.2 Porous seal coat on cement mortar linings of pipes In the case of cement mortar linings with porous seal-coat, the cement mortar lining shall comply with 5.1 and the seal coat

42、material with 5.3. In addition, test one sample of porous seal-coated cement mortar lined pipe taken at random from each of three different production batches of the cured product. When tested in accordance with EN 14944-1 using chlorine-free test water, at a fixed S/V of 2,5 dm2/l, the following pr

43、operties shall be determined by all three samples after the third contact period: a) threshold flavour number (TFN) and threshold odour number (TON) according to EN 1622; b) change in colour and turbidity under visual inspection; and c) enhancement of microbial growth according to EN 16421. 5.3 Ceme

44、nt mortar linings of fittings Fittings are lined with cement mortar in a procedure where organic constituents, mostly acrylic resin dispersions, are used to lower the w/c-ratio. These linings have to be tested in the same way as organic free cement mortar linings. Additionally they have to be tested

45、 to their enhancement of microbial growth (EMG) according to EN 16421. PD CEN/TR 16950:2016CEN/TR 16950:2016 (E) 10 5.4 Organic linings (except bitumen) 5.4.1 Organoleptic parameters When tested in accordance with EN 1420, using chlorine-free test water at a fixed S/V of 2,5 dm2/l for pipes and 1,0

46、dm2/l for fittings and joint areas, the following properties shall be determined after the third contact period: a) threshold flavour number (TFN) and threshold odour number (TON) according to EN 1622; and b) change in colour and turbidity under visual inspection. 5.4.2 Migration When tested in acco

47、rdance with EN 12873-1, using chlorine-free test water at a fixed S/V of 10 dm2/l, the migration of organics shall be determined after the third contact period (expressed as TOC for pipes and for fittings and joint areas in mg/(m2d). In addition, maximum migration rates of specific organics may be d

48、efined in national regulations and positive lists. 5.4.3 Enhancement of microbial growth (EMG) All organic linings (epoxy, polyurethane, polyolefin etc.) are tested to their enhancement of microbial growth (EMG) according to EN 16421. 5.5 Bituminous linings for fittings and joint areas 5.5.1 Organol

49、eptic parameters When tested in accordance with EN 1420, using chlorine-free test water at a fixed S/V of 1,0 dm2/l, the following properties shall be determined after the third contact period: a) threshold flavour number (TFN) and threshold odour number (TON) according to EN 1622; and b) change in colour and turbidity under visual inspection. 5.5.2 Migration When tested in accordance with EN 12873-1, using chlorine-free test water at a fixed S/V of 10 dm2/l, the following properties shall be determined after the third contact pe