Plastics piping systems for renovation of underground water supply networks - Part 3: Lining with close fit-pipes

This part 3 of EN 14409, in conjunction with EN 14409-1 specifies requirements and test methods for close-fit lining systems intended to be used for the renovation of water supply networks of water intended for human consumption, including raw water intake pipelines
It covers polyethylene (PE) pipe for both independent and interactive pressure pipe liners and associated fittings and joints for the construction of the lining system.

Kunststoff-Rohrleitungssysteme für die Renovierung erdverlegter Wasserversorgungsnetze - Teil 3: Close-Fit-Lining

Dieser Teil 3 von EN 14409 legt in Verbindung mit EN 14409-1 Anforderungen und Prüfverfahren für Close-Fit-
Lining-Systeme fest, die für den Einsatz bei der Renovierung von Wasserversorgungsnetzen für Wasser für den
menschlichen Gebrauch einschließlich Rohwasser-Entnahmeleitungen vorgesehen sind.
Die Norm gilt für Rohre aus Polyethylen (PE) für sowohl unabhängige als auch für in Wechselwirkung stehende
Druck-Liner-Rohre und die dazugehörigen Formstücke und Verbindungen für den Bau des Lining-Systems.

Systèmes de canalisations plastiques pour la rénovation des réseaux enterrés pour l'alimentation en eau - Partie 3 : Tubage par tuyau continu sans espace annulaire

La présente partie 3 de l'EN 14409, à consulter en association avec l'EN 14409-1, spécifie les exigences et les méthodes d'essai pour les systèmes de tubages par tuyau continu sans espace annulaire utilisés pour la rénovation des réseaux enterrés pour l'alimentation en eau destinée à la consommation humaine, y compris les canalisations pour prise d'eau brute.
Elle couvre les tubes en polyéthylène (PE) à la fois pour les tubages autostructurants et les tubages nécessitant le maintien de l'enveloppe ainsi que les raccords associés et les assemblages pour la construction du système de rénovation.

Cevni sistemi iz polimernih materialov za obnovo podzemnih omrežij za oskrbo z vodo - 3. del: Oblaganje s tesno prilagodljivimi cevmi

General Information

Status
Withdrawn
Publication Date
28-Sep-2004
Withdrawal Date
26-Apr-2011
Current Stage
9960 - Withdrawal effective - Withdrawal
Due Date
27-Apr-2011
Completion Date
27-Apr-2011

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevni sistemi iz polimernih materialov za obnovo podzemnih omrežij za oskrbo z vodo - 3. del: Oblaganje s tesno prilagodljivimi cevmiKunststoff-Rohrleitungssysteme für die Renovierung erdverlegter Wasserversorgungsnetze - Teil 3: Close-Fit-LiningSystemes de canalisations plastiques pour la rénovation des réseaux enterrés pour l'alimentation en eau - Partie 3 : Tubage par tuyau continu sans espace annulairePlastics piping systems for renovation of underground water supply networks - Part 3: Lining with close fit-pipes93.025Zunanji sistemi za prevajanje vodeExternal water conveyance systems23.040.20Cevi iz polimernih materialovPlastics pipesICS:Ta slovenski standard je istoveten z:EN 14409-3:2004SIST EN 14409-3:2005en,fr,de01-januar-2005SIST EN 14409-3:2005SLOVENSKI

STANDARD
SIST EN 14409-3:2005

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14409-3September 2004ICS 23.040.20; 23.040.45; 93.025English versionPlastics piping systems for renovation of underground watersupply networks - Part 3: Lining with close fit-pipesSystèmes de canalisations plastiques pour la rénovationdes réseaux enterrés pour l'alimentation en eau - Partie 3 :Tubage par tuyau continu sans espace annulaireKunststoff-Rohrleitungssysteme für die Renovierungerdverlegter Wasserversorgungsnetze - Teil 3: Close-Fit-LiningThis European Standard was approved by CEN on 29 July 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14409-3:2004: ESIST EN 14409-3:2005

EN 14409-3:2004 (E) 2 Contents Contents...................................................................................................................................................................2 Foreword...................................................................................................................................................................3 1 Scope.................................................................................................................................................................5 2 Normative references......................................................................................................................................5 3 Terms, definitions, symbols and abbreviations...........................................................................................5 4 Pipes at the “M” stage.....................................................................................................................................9 5 Fittings at the “M” stage................................................................................................................................10 6 Valves..............................................................................................................................................................10 7 Fitness for purpose of the lining system at the “I” stage..........................................................................11 8 Installation practice.......................................................................................................................................14 Annex A (informative)

Guidance for assessment of conformity.....................................................................17 Annex B (normative)

Factory folded heat reverted polyethylene (PE) pipe – Determination of memory ability.......................................................................................................................................................................21 Annex C (informative)

Folded polyethylene (PE) pipe — Determination of resistance to circumferential tensile stress at constant temperature................................................................................................................23 Bibliography...........................................................................................................................................................27

SIST EN 14409-3:2005

EN 14409-3:2004 (E) 3 Foreword This document (EN 14409-3:2004) has been prepared by Technical Committee CEN/TC 155, "Plastics piping systems and ducting systems", the secretariat of which is held by NEN. 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 March 2005, and conflicting national standards shall be withdrawn at the latest by March 2005. System standards dealing with the following applications are either available or in preparation: — Plastics piping systems for renovation of underground non-pressure drainage and sewerage networks;

— Plastics piping systems for renovation of underground water supply networks [this application]; — Plastics piping systems for renovation of underground gas supply networks; — Plastics Piping Systems for Renovation of underground pressure drainage and sewerage networks; — Plastics piping systems for renovation of industrial pipe systems. These system standards are distinguished from system standards for conventionally installed plastics piping systems by the requirement to verify certain characteristics in the as-installed condition, after site processing. This is in addition to verification of characteristics of plastics piping systems as manufactured. These system standards are complemented by the information contained in ISO/TR 11295 [6] and EN 13689 [1] (listed in the bibliography). The system standard EN 14409 comprises five parts, as follows:

— Part 1: General — Part 2: Lining with continuous pipes — Part 3: Lining with close-fit pipes (this document) — Part 4: Lining with cured-in-place pipes — Part 6: Lining with inserted hoses The requirements for any given renovation technique family are covered by Part 1: General, and are for use in conjunction with the relevant other part. For example, for the requirements relating to "Lining with close-fit pipes", it is necessary to refer to both parts 1 and 3. A consistent structure of clause headings has been adopted for all parts to facilitate direct comparisons across renovation technique families. Figure 1 shows the common part and clause structure and the relationship between EN 14409 and the system standards for other applications. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 4
Figure 1  Format of the renovation system standards SIST EN 14409-3:2005

EN 14409-3:2004 (E) 5 1 Scope This part 3 of EN 14409, in conjunction with EN 14409-1 specifies requirements and test methods for close-fit lining systems intended to be used for the renovation of water supply networks of water intended for human consumption, including raw water intake pipelines It covers polyethylene (PE) pipe for both independent and interactive pressure pipe liners and associated fittings and joints for the construction of the lining system. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 921, Plastics piping systems — Thermoplastics pipes — Determination of resistance to internal pressure at constant temperature EN 12201-1:2003, Plastics piping systems for water supply — Polyethylene (PE) — Part 1: General EN 12201-2:2003, Plastics piping systems for water supply — Polyethylene (PE) — Part 2: Pipes EN 12201-3, Plastics piping systems for water supply — Polyethylene (PE) — Part 3: Fittings EN 12201-4, Plastics piping systems for water supply — Polyethylene (PE) — Part 4: Valves

EN 12201-5:2003, Plastics piping systems for water supply — Polyethylene (PE) — Part 5: Fitness for purpose of the system EN 14409-1, Plastics piping systems for renovation of underground water supply networks — Part 1: General

prEN ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions (ISO 3126:2004) ISO 12176-1, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 1: Butt fusion.

ISO 12176-2, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 2: Electro fusion. 3 Terms, definitions, symbols and abbreviations For the purposes of this document, the terms, definitions, symbols and abbreviations given in EN 14409-1:2004, and the following apply. 3.1 General terms and definitions 3.1.1 close fit situation of the outside of the installed liner relative to the inside of the existing pipeline, which may either be an interference fit or include a small annular gap resulting from shrinkage and tolerances only. 3.1.2 close-fit pipe continuous lining pipe of thermoplastic material reshaped or otherwise expanded after insertion to achieve a close fit to the existing pipeline 3.2 Terms and definitions related to techniques No definitions apply. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 6 3.3 Geometrical definitions 3.3.1 outside diameter at any point de value of the measurement of the outside diameter through its cross section at any point of the pipe, rounded to the next greater 0,1 mm 3.3.2 minimum mean outside diameter

dem,min minimum value of the outside diameter as specified for a given nominal size 3.3.3 maximum mean outside diameter

dem,max maximum value of the outside diameter as specified for a given nominal size 3.3.4 out-of-roundness (ovality) difference between the measured maximum outside diameter and the measured minimum outside diameter in the same cross section of the pipe or spigot end of a fitting 3.3.5 nominal wall thickness

en numerical designation of the wall thickness of a component, which is a convenient round number, approximately equal to the manufacturing dimension in millimetres NOTE For thermoplastics components conforming to EN 12201, the value of the nominal wall thickness, en, is identical to the specified minimum wall thickness at any point, emin. 3.3.6 minimum wall thickness at any point

emin minimum value of the wall thickness at any point around the circumference of a component as specified 3.3.7 maximum mean wall thickness at any point

em,max maximum mean value of the wall thickness at any point around the circumference of a component as specified 3.3.8 tolerance permissible variation of the specified value of a quantity expressed as the difference between the permissible maximum and permissible minimum values 3.4

Material definitions 3.4.1 compound homogenous mixture of base polymer (PE) and additives, i.e. anti-oxidants, pigments, UV-stabilisers and others, at a dosage level necessary for the processing and use of components conforming to the requirements of this document SIST EN 14409-3:2005

EN 14409-3:2004 (E) 7 3.5

Definitions related to material characteristics 3.5.1 lower confidence limit of the predicted hydrostatic strength at 20 °C for 50 years σLPL quantity with the dimensions of stress, expressed in megapascals (MPa), which can be considered as a property of the material, and represents the 97,5 % lower confidence limit of the mean predicted long-term hydrostatic strength for water at 20 °C for 50 years with internal water pressure 3.5.2 minimum required strength (MRS) value of 1LPL, rounded to the next lower value of the R10 series or of the R20 –series, depending on the value of 1LPL NOTE R10- and R20-series are the Renard number series conforming to ISO 3 [3] and ISO 497 [4].

3.5.3 overall service (design) coefficient

C overall coefficient with a value greater than one, which takes into consideration service conditions as well as properties of the components of a piping system other than those represented in the lower confidence limit NOTE The minimum overall design coefficient for water is 1,25. 3.5.4 design stress

σs allowable stress, in megapascals, for a given application.

It is derived by dividing the MRS it by the coefficient C, then rouding to the next lower value in the R20 series, i.e.: =CS[MRS]

σ 3.5.5 melt-mass flow rate (MFR) value relating to the viscosity of the molten material at a specified temperature and rate of shear, expressed in grams per 10 min (g/10 min) 3.6

Definitions related to service conditions 3.6.1 nominal pressure (PN) numerical designation used for reference purposes related to the mechanical characteristics of the component of a piping system. For plastic piping systems conveying water it corresponds to the maximum continuous operating pressure in bar, which can be sustained with water at 20 °C, based on the minimum design coefficient 3.6.2 maximum operating pressure (MOP) maximum effective pressure of the fluid in the piping system, expressed in bar, which is allowed in continuous use. It takes into account the physical and the mechanical characteristics of the components of a piping system NOTE It is calculated using the following equation: 1)-([SDR][MRS] 20 P][××=C SIST EN 14409-3:2005

EN 14409-3:2004 (E) 8 3.7

Definitions related to joints 3.7.1 electrofusion joint joint between a PE electrofusion socket or saddle fitting and a pipe or a spigot end fitting. The electrofusion fittings are heated by the Joule effect of the heating element incorporated at their jointing surfaces, causing the material adjacent to them to melt and the pipe and fitting surfaces to fuse 3.7.2 butt fusion joint (using heated tool) joint made by heating the planed ends the surfaces of which match by holding them against a flat heating plate until the PE material reaches fusion temperature, removing the heating plate quickly and pushing the two softened ends against one another 3.7.3 mechanical joint joint made by assembling a PE pipe with a fitting that generally includes a compression part to provide for pressure integrity, leaktightness and resistance to end loads.

3.7.4 fusion compatibility ability of two similar or dissimilar polyethylene materials to be fused together to form a joint which conforms to the performance requirements of this document 3.8

Definitions related to assessment of conformity No definitions apply. 3.9 Symbols and abbreviations 3.9.1 Symbols For the purpose of this document, the symbols given in EN 14409-1:2004 apply, together with the following: C :

overall service (design) coefficient de :
outside diameter (at any point) dem :
mean outside diameter dem,max :
maximum mean outside diameter dem,min :
minimum mean outside diameter dmanuf :
the original circular diameter of the pipe (before folding) emax :
maximum wall thickness (at any point) T :
temperature at which stress rupture data have been determined t :
time to occurrence of a leak in the pipe ty :

wall thickness tolerance σLPL : quantity with the dimensions of stress, which represents the 97,5 % lower confidence

limit of the predicted hydrostatic strength at a temperature T and time t σs :
design stress 3.10 Abbreviations DN :
nominal size LPL :
lower confidence limit of the predicted hydrostatic strength MFR :
melt mass-flow rate SIST EN 14409-3:2005
EN 14409-3:2004 (E) 9 MOP :
maximum operating pressure MRS :
minimum required strength PE :
polyethylene R :

series of preferred numbers, conforming to the Renard series 4 Pipes at the “M” stage 4.1 Materials 4.1.1 Virgin material The virgin material used shall be one in accordance with the following designation of the PE compounds.

Designation Classification by MRS (MPa) PE 80 8 PE 100 10 The compound shall conform to EN 12201-1. 4.1.2 Reprocessable material and recyclable material Own reprocessable material may be used, provided that it is derived from the same compound, as used for the relevant production. External reprocessable material shall not be used. Recyclable material shall not be used. 4.2 General characteristics 4.2.1 Appearance When viewed without magnification, the internal and external surfaces of the pipe shall be smooth, clean and free from scoring, cavities and other defects which would prevent conformity to this document. 4.2.2 Colour The pipes shall be blue or black with blue identification stripes 4.3 Material characteristics The material from which the pipes are made shall conform to the requirements as specified in Table 1 of EN 12201-1:2003. 4.4 Geometric characteristics The pipe diameter, wall thickness and shape in the "M" stage depend on the specific close-fit lining technique. "M" stage dimensions needed to obtain "I" stage dimensions (see 7.4), shall be declared, with their tolerances, by the manufacturer. NOTE In the case of factory folded pipes variations in wall thickness in one cross-section can be present. This is acceptable as long as the folded pipe has the property to obtain a wall thickness in accordance with 7.4 during/after the reversion process.

SIST EN 14409-3:2005

EN 14409-3:2004 (E) 10 4.5 Mechanical characteristics When tested in accordance with the method given in Table 1, the pipe shall conform to the requirements in the table. Table 1 — Mechanical characteristics of pipes Test parameters Characteristic Requirement Parameter Value Test method

Hydrostatic strength at 80 °C a No failure a Shall conform to Table 3 of
EN 12201-2:2003

b EN 921:1994 a In case the requirement is not met because of ductile failure mode, re-testing shall be done in accordance with 7.3 of EN 12201-2:2003. b The pipe shall be reverted in the case of factory-folded pipes.

4.6 Physical characteristics Physical characteristics shall conform to those specified in EN 12201-2. In the case of factory-folded heat-reverted pipes, the pipe shall additionally conform to the requirement for memory ability specified in Annex B. 4.7 Jointing Butt fusion joints shall conform to EN 12201-2 and EN 12201-5. Butt fusion joints shall not be made between folded pipes prior to reversion. NOTE The joining of circular pipes to form a string prior to site processing is considered as part of the “M”-stage.

4.8 Marking Pipes shall be marked in accordance with 4.8 of EN 14409-1:2004. NOTE In addition the PE pipe can be marked with the following optional information:

MFR

5 Fittings at the “M” stage Fittings shall conform to the requirement of EN 12201-3. NOTE 1 It is possible that some fittings conforming to EN 12201-3 are not compatible with the dimensional tolerances detailed in Table 2. NOTE 2

Interactive pressure pipe liners can rely on the use of technique-dependent, mechanical fittings for end connections and service connections. The mechanical fittings provide the connection between the liner, which is generally thin walled, and the rest of the pipeline system, by clamping the liner wall inside/outside. By means of a movable compression part, the fitting provides pressure integrity, leaktightness and resistance to end loads. The fitting generally includes a support sleeve either inserted into or assembled around the liner and can include also a grip ring. The mechanical fitting can be supplied for field assembly. 6 Valves Valves shall conform to the requirements of EN 12201-4. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 11 7 Fitness for purpose of the lining system at the “I” stage 7.1 Materials Any combination of pipes and fittings for heat fusion conforming to Clauses 4 and 5 respectively may be used provided that fusion compatibility has been demonstrated in accordance with Clause 4 of EN 12201-5:2003. 7.2 General characteristics The internal surface of the pipe shall be smooth, free from scoring and other defects that could impair the functionality.

NOTE A feature of close fit pipe is that the lining may conform to the surface characteristics of the existing pipe. 7.3 Material characteristics There are no additional requirements for material characteristics. 7.4 Geometric characteristics Samples of pipes taken from actual or simulated installations, shall have wall thicknesses conforming to the requirements of Table 2, whereby relevant dimensions are to be measured according to prEN ISO 3126 at a temperature of (23 ± 2) °C. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 12 Table 2 — Pipe wall thicknesses after installation Dimensions in millimetres Standard dimension ratio a SDR 11 SDR 17 SDR 17,6 SDR 26 SDR 33 c Wall thickness b Maximum mean outside diameter a dem,max

emin em,max emin em,max emin em,max emin em,max emin em,max 100 125 150 200 225
250 300 350 400
500 600 700 800
1000 1200 9,1 11,4 13,7 18,2 20,5
22,7 27,3 31,9
10,7 13,3 15,9 20,9 23,5
26,0 31,1 36,3 5,9 7,4 8,9 11,9 13,4
14,8 17,7 20,6 23,7
29,7
7,1 8,8 10,5 13,9 15,6
17,1 20,4 23,6 27,1
33,5 5,7 7,1 8,6 11,4 12,8
14,2 17,1 19,9 22,8
28,3 6,9 8,5 10,2 13,3 14,9
16,4 19,7 22,8 26,1
32,2
3,9 4,8 5,8 7,7 8,6
9,6 11,6 13,5 15,3
19,1 23,1
4,9 5,9 7,0 9,2 10,2
11,3 13,5 15,6 17,7
21,9 26,4
4,7 6,2 7,0
7,7 9,3 10,8 12,3
15,3 18,5 21,6 24,5
30,6 36,7
5,8 7,5 8,4
9,2 11,0 12,6 14,3
17,7 21,2 24,7 28,0

34,8 41,7 a Outside diameters and SDRs are examples, other sizes and SDRs are acceptable. b Wall thickness requirements calculated as, both rounded up to the next 0,1 mm:

emin
= dem,max / SDR ,

em,max = 1,12emin + 0,5 mm c Pipes with SDR values ≥ 33 may only be applied as interactive linings

7.5 Mechanical characteristics When tested in accordance with the methods given in Table 3 or Table 4, as applicable, pipes, taken from actual or simulated installations in accordance with 7.8, shall have mechanical characteristics conforming to the table. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 13 Table 3 — Mechanical characteristics of pipes Test parameters a, b Characteristic Requirement

Parameters Value Test method Hydrostatic strength at 20 °C (100 h) No failure Stress for

PE 80
PE 100:
Test period

σ = 10 MPa σ = 12,4 MPa 100 h EN 921 Hydrostatic strength at 80 °C (1000 h) No failure Stress for

PE 80
PE 100:
Test period

σ = 4,0 MPa σ = 5,0 MPa 1000 h EN 921 a Where the test parameters cannot be met with a particular technique (e.g. limited product range, not including SDR11), the test parameters shall be re-calculated accordingly b

Where electro fusion saddles are offered as part of the lining system, the long term integrity of the saddle/reverted pipe-assembly shall be demonstrated in accordance with EN 12201-5

Table 4 — Mechanical characteristics of assembly Characteristic Requirement Test parameters

Test method Butt fusion joints

Hydrostatic internal pressure strength at 80 °C (165 h) Tensile strength Shall conform to EN 12201-5 Mechanical joints a, electrofusion joints and socket fusion joints Leaktightness under internal pressure Hydrostatic strength at 80 °C (165 h) Leaktightness under internal pressure when subjected to bending External pressure test (mechanical joints only) Resistance to pull out Shall conform to EN 12201-5 a

Where a joint applies radial compression, a cylindrical metal sleeve shall be inserted into the pipe end, providing permanent internal support to prevent creep.

7.6 Physical characteristics There are no requirements for physical characteristics of the installed pipe. 7.7 Additional characteristics No additional characteristics apply. 7.8 Sampling The sampling of the installed pipe shall conform to 7.8 of EN 14409-1:2004. NOTE For process verification testing, samples can conveniently be taken either from the exposed end of an installed liner where this emerges from the host pipe, or from a section of the liner installed in a length of simulated host pipe; see 8.4.3 of EN 14409-1:2004. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 14 8 Installation practice 8.1 Preparatory work Preparatory work shall conform to 8.1 of EN 14409-1:2004. 8.2 Storage, handling and transport Precautions shall be taken to ensure that no excessive damage is caused to the lining pipe during unloading, site handling and storage. In this context excessive damage shall mean any scratch which is more than 10 % of the wall thickness in depth, or the imposition of any severe bending operation which results in a permanent kink, crease or fold. NOTE 1 The lining pipe should be stored on reasonably level ground, free of large sharp stones, debris or litter, to avoid potentially damaging

point-loading. In general and in the absence of any specific handling requirements, these precautions shall include the use of webbing slings in place of wire rope or chains, and the use of spreader beams for pipe lengths in excess of 12 m. Where the system designer specifies handling requirements, these shall prevail. The lining pipe shall be transported on a flat bed vehicle free from nails or other projections or on a purpose-built trailer designed to carry the lining pipe as a free standing coil or wound on to a drum. Before being loaded onto a trailer, the lining pipe shall be visually checked for any damage. Pipe ends shall be securely sealed to prevent contamination of the pipe by moisture, and/or dirt under storage, handling and transport. NOTE 2 For pipes of 600 mm diameter or larger a suitable plug which also prevents ovalisation or other deformation is recommended. Pipes which do not meet the above stated specifications shall be rejected, clearly marked and removed to a separate stock. 8.3 Equipment 8.3.1 Butt-fusion and debeading equipment Butt fusion equipment shall conform to ISO 12176-1 and shall be capable of producing joints under site conditions, and in addition to the heater plate shall include such clamping, re-rounding and trimming facilities as will ensure alignment and matching of the pipe ends, and an external debeader able to remove the bead cleanly in one continuous strip without damage to the pipe, in accordance with the instruction manual.

NOTE A shelter should be provided to avoid weld contamination from water and dust, and to generally maintain a clean and warm working environment. The lining pipe string should be plugged to prevent cold air blowing through which could otherwise adversely affect the weld. 8.3.2 Reduction equipment Depending on the lining technique, a reduction of the lining pipe may take place at the site. The reduction equipment shall be operated in accordance with the technique’s specification. Reduction or deformation equipment for use on site shall be free from sharp edges that could damage the pipe during deformation.

Any lubricant used in the reduction process shall have no adverse effects on the lining material and be approved for contact with potable water. 8.3.3 Pipe skids/rollers Depending on the technique, pipe skids or rollers shall be used. These shall minimise frictional loads and prevent damage to the pipe as it is moved during the butt-fusion and installation processes. SIST EN 14409-3:2005

EN 14409-3:2004 (E) 15 8.3.4 Winching equipment The winch equipment shall have a means of recording, graphically or numerically, the load applied to the winch cable during installation. NOTE 1 All winching operations are potentially dangerous and any exposed winch cable should be guarded. It is necessary in respect of winching equipment and operations to take account of all applicable national health and safety regulations. NOTE 2 Winching equipment normally consists of a powered winch connected to the lining pipe by a winch cable and appropriate nose cone connection. The force in the winch cable should be measured directly, and not inferred from the hydraulic pressure on the drive motors or by other such indirect means. 8.3.5 Pipe entry guides Guides should be used at the ends of the host pipe to prevent damage to the lining pipe during insertion. 8.3.6 Reforming equipment Any equipment used to carry out the reforming or rerounding process shall be capable of providing the required conditions of pressure and temperature and shall be in accordance with the technique’s specification. 8.3.7 Electrofusion equipment Electrofusion equipment shall conform to ISO 12176-2. The power supplier/controller and associated alignment and fixing clamps shall be such as to ensure fusion when following the manufacturer's guidelines for surface preparation and fusion. 8.4 Installation

Installation shall follow the procedures detailed in the installation manual. The installation manual shall specify all necessary parameters and details of the method of reforming the lining pipe to achieve a close fit. Where applicable, the description of the reforming method and the installation parameters shall specify, according to the requirements of the technique concerned: a)

maximum and/or minimum values of any internal pressure to be applied; b)
maxim
...

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