1、PD CEN/TR 16950:2016 Ductile iron pipes, fittings and accessories Sanitary characteristics and test methods BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06PD CEN/TR 16950:2016 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of
2、CEN/TR 16950:2016. The UK participation in its preparation was entrusted to Technical Committee PSE/10, Iron pipes and fittings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provision
3、s of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 91966 4 ICS 23.040.10; 23.040.40 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Documen
4、t was published under the authority of the Standards Policy and Strategy Committee on 31 August 2016. Amendments issued since publication Date 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 Ducti
5、le iron pipes, fittings and 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 Repo
6、rt was approved by CEN on 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, Gre
7、ece, Hungary, Iceland, 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
8、 CEN-CENELEC Management 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. CEN/TR 16950:2016 EPD CEN/TR 16950:2016 CEN/TR 16950:2016 (E) 2 Contents Page European foreword . 4 Introduction 5
9、1 Scope 6 2 Normative references 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 pi
10、pes. 9 5.3 Cement mortar linings 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
11、 5.5.3 Enhancement of microbial 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 Anne
12、x A (informative) National 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 16950:2016 CEN/TR 16950:2016 (E) 3 A.10 Switzerland
13、 . 14 A.11 United Kingdom 14 Bibliography . 16 PD CEN/TR 16950:2016 CEN/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 dr
14、awn 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. PD CEN/TR 16950:2016 CEN/TR 16950:2016 (E) 5 Introduction This Technical Report is in conformity with
15、 the general requirements already 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
16、within the scope of this Technical 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
17、compliance with existing national 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 prope
18、rties of this Technical Report. 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 16950:2016 CEN/TR 16950:2016 (E) 6 1 Scope This Tech
19、nical Report contains the sanitary 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
20、to 50 C. Ductile cast iron itself 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 s
21、urface/volume ratios are used 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 indi
22、spensable 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. EN 1420, Influence of organic materials on water intended for human consumption Determination of odour and fl
23、avour assessment of water in piping 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
24、made from or incorporating organic 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
25、Test methods Part 1: Influence 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 material
26、s on water for human consumption 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-ph
27、enylenediamine (ISO 7393-1) EN 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 wat
28、er by HPLC with fluorescence detection 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 16950:2016 CEN/TR 16950:2016 (E) 7 3.1 ductile iron cast iron used for pipes, fittings and accessories in
29、which graphite is present substantially 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
30、 the internal surfaces Note 1 to 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 co
31、at layer of an organic varnish 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 act
32、s as a barrier between the ductile 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 w
33、ater in the assembled pipeline 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 16950:2016 CEN/TR 16950:2016 (E) 8 3.9 rubber gaskets seal
34、ing component of a joint 3.10 lubricant 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 co
35、nditions (same materials, same process) 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
36、 gasket sections produced under 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 migratio
37、n properties. 5.1.2 Organoleptic 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 dm 2 /l for pipes and 1,0 dm 2 /l for fittings, the following properties shall be determined after the third contact p
38、eriod: a) threshold flavour number (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
39、 of 10 dm 2 /l, the following properties shall be determined after the third contact period: a) migration of organics expressed as TOC for pipes and fittings in mg/(m 2 d); and b) migration of metals; if the cement contains higher metal concentrations than indicated in Table 1, migration rates of me
40、tals given in Table 2 shall be determined. PD CEN/TR 16950:2016 CEN/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
41、 % Table 2 Migration rates Type of metal 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
42、 shall comply with 5.1 and the seal coat 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
43、 fixed S/V of 2,5 dm 2 /l, the following properties 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 micro
44、bial growth according to EN 16421. 5.3 Cement 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 l
45、inings. Additionally they have to be tested to their enhancement of microbial growth (EMG) according to EN 16421. PD CEN/TR 16950:2016 CEN/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
46、 a fixed S/V of 2,5 dm 2 /l for pipes and 1,0 dm 2 /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
47、 inspection. 5.4.2 Migration When tested in accordance with EN 12873-1, using chlorine-free test water at a fixed S/V of 10 dm 2 /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/(m 2 d) ) . In addition
48、, maximum migration rates of specific organics may be defined 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 Bitumi
49、nous linings for fittings and joint areas 5.5.1 Organoleptic parameters When tested in accordance with EN 1420, using chlorine-free test water at a fixed S/V of 1,0 dm 2 /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 dm 2 /l, the followin
