National Evaluation Guideline

Transcription

1 Comments before 11 January 2013 for the KOMO (technical approval-with-) product certificate for Plastics piping systems intended for geothermal heat exchange in closed loops Setup by CvD (LSK) d.d. datum vastgesteld Accepted by the Harmonisatie Commissie Bouw of the foundation Stichting Bouwkwaliteit. datum aanvaard

2 Preface Kiwa This has been prepared by the Kiwa Board of Experts LSK, in which the parties interested in the area Geothermal heat exchange in vertical closed loops with plastics piping systems, are represented. This Board of Experts also guides the performance of certification and adjusts this evaluation guideline where necessary. Wherever the term Board of Experts is used in this evaluation guideline, the above-mentioned Board of Experts is meant. Kiwa will use this in conjunction with the Kiwa Regulations for Product Certification. These Regulations detail the methods employed by Kiwa for conducting the necessary investigations prior to issuing the technical approval-with-product certificate and the method of external control. Binding declaration This evaluation guideline is declared binding by Kiwa per date Binding declaration. Kiwa Nederland B.V. Sir Winston Churchilllaan 273 P.O AB RIJSWIJK www.kiwa.nl 2012 Kiwa N.V. All rights reserved. No part of this publication may be reproduced and/or published by means of printing, photocopying, microfilm or in any other manner whatsoever without the publisher s prior permission in writing. Without prejudice of the approval by the Harmonisatie Commissie Bouw of the foundation Stichting Bouwkwaliteit, all rights rests with Kiwa. The use of this evaluation guideline for any purpose whatsoever shall only be allowed after the conclusion of a written agreement with Kiwa in which the right of use is arranged Comments before 11 January 2013

3 Table of contents Preface Kiwa 1 Table of contents 2 1 Introduction General Field of application Roadmap to content Acceptance of test reports delivered by the supplier (Technical approval-with-) product certificate 6 2 Terminology General definitions Geometrical terminology and definitions Terminology and definitions related to service conditions Symbols Abbreviations 12 3 Procedure for obtaining the quality declaration Pre-certification tests Issue of the certificate 13 4 General requirements and test methods General Standard vertical and coaxial systems Horizontal systems Horizontal distribution pipes Lifetime of the system Heat transport fluid Environment Requirements for the joints Metal fittings Installation instructions Certification mark for the geothermal probe and system Comments before 11 January 2013

4 5 Quality system requirements 26 6 Summary of tests and inspections 27 7 Requirements imposed on the certification body 31 8 List of mentioned documents 35 9 Annex A: Requirements and test methods for PE-piping systems (class cold) Annex B: Requirements and test methods for PE-X piping systems (class cold and hot) Annex C: Requirements and test methods for PB-piping systems (Class cold and hot) Annex D: Requirements and test methods for PE-RT- II piping systems (Class cold and hot) Annex E: Determination of the resistance to permeation Annex F: Determination of the tightness of the joints after freezing Annex G: Roadmap to content Annex 1: Model IQC scheme Annex 2: Example technical approval-with-product certificate Comments before 11 January 2013

5 1 Introduction 1.1 General The requirements embodied in this evaluation guideline (BRL), shall be employed by certification institutes that are accredited by the Dutch Accreditation Council (RvA) when dealing with applications for the issue or maintenance of a (technical approvalwith-)product certificate for geothermal heat exchange in vertical closed loops with plastics piping systems. The quality declarations to be issued are indicated as KOMO (technical approvalwith-)product certificate. The technical field of this evaluation guideline is: F2 plastics piping systems. Besides the requirements embodied in this evaluation guideline, certification institutes impose additional requirements in the sense of requirements with regard to general procedures for certification as laid down in the general certification regulations of the respective certification body. During the execution of certification activities, the certification bodies have to fulfil the requirements as laid down in the chapter Requirements imposed on the certification body Comments before 11 January 2013

6 1.2 Field of application Piping systems class: cold (PE) The products are intended to be used in piping systems for geothermal heat exchange in vertical or horizontal closed loops at a design pressure (= maximum working pressure) of at least 1.6 MPa (16 bar overpressure ) or higher and a MRS of at least 10 N/mm 2. Following the standards for plastics piping systems for water supply, and for drainage and sewerage under pressure according to NEN-EN Piping systems class: cold and hot (PE-X, PB and PE-RT-II) The products are intended to be used in piping systems for geothermal heat exchange in vertical or horizontal closed loops at a design pressure (= maximum working pressure) of at least 0.8 MPa (8 bar overpressure). Following the standards for hot and cold water installations according to NEN-EN-ISO 15875, NEN-EN-ISO and NEN-EN-ISO Table 1 Classification horizontal and vertical system Class Cold Hot Material Lifetime Expectancy Temperature profile Maximum Depth PE100, 50 years from -20 ºC to 40 ºC 250 m *2 ) PE-X, PB-1 PE-RT type II PE-X, PB-1 PE-RT type II 50 years 50 years T=20 ºC with designcoefficient=1,25 for 50 years from -20 ºC to 40 ºC Tdesign =40 º C with C =1,5 for 50 years from 40 ºC to 70 ºC Tdesign =70 ºC with C =1,5 for 50 years *1) 250 m *2) 250 m *2) Remark 1: relation of temperature and depth can be found in table 14,18 or 22. Remark 2: Larger depths are possible if the maximum pressure is observed or probes with higher pressure levels are used. The maximum pressure, i.e. the differential pressure between inner and outer pressure and vice versa, has to be observed during installation and grouting of the geothermal probe. 1.3 Roadmap to content See Annex G Comments before 11 January 2013

7 1.4 Acceptance of test reports delivered by the supplier If the supplier submits reports from research bodies or laboratories to show that the requirements of the evaluation guideline are met, then these reports have to be prepared by a body meeting the prevailing accreditation standard, i.e.: NEN-EN-ISO/IEC for laboratories; NEN-EN-ISO/IEC for inspection bodies; NEN-EN for certification bodies certifying products; NEN-EN for certification bodies certifying systems; NEN-EN-ISO/IEC for certification bodies certifying persons. The body is deemed to meet these criteria if an accreditation certificate can be submitted which has been issued by the Dutch Accreditation Council (RvA) or an accreditation body with which the Dutch Accreditation Council has concluded a mutual acceptance agreement. This accreditation should relate to the tests required for this evaluation guideline. If no accreditation certificate can be submitted, the certification body shall verify whether the accreditation standard has been met or carry out the tests concerned. 1.5 (Technical approval-with-) product certificate The model of the KOMO (technical approval-with-)product certificate issued on the basis of this evaluation guideline has been included in this guideline as annex 2: Example technical approval-with-product certificate Comments before 11 January 2013

8 2 Terminology 2.1 General definitions Evaluation guideline The agreements made within the Board of Experts with regard to the subjects of certification Board of Experts The Board of Experts CvD-LSK Supplier The party responsible for ensuring that the products continuously fulfil the requirements on which the certification is based IQC-scheme A description of the quality controls carried out by the supplier as part of his quality system Product requirements In sizes and numbers concretized requirements which are focused on (identifiable) characteristics of products, which contain a limiting value that can be calculated or measured Pre-certification tests The investigation necessary in order to determine whether all requirements of the evaluation guideline are fulfilled Inspection visit The surveillance inspections carried out after issue of the certificate in order to determine whether the certified products continuously fulfil the requirements of this evaluation guideline. The inspections are carried out according to the frequency indicated Dimension groups Two dimensions groups are distinguished: Group 1: 12 mm < dn < 63 mm Group 2: 75 mm < dn < 250 mm Geothemal piping system The total of geothermal probe + weight, horizontal network, joints until the connection to the manifold Comments before 11 January 2013

9 Flexible piping system A piping system in which possible bends in the pipe can be made without any mechanical means and in which the pipe is not deformed and the flow capacity is not reduced due to the possible bends Electrofusion fittings Fittings by which the connection is made by means of an electrofusion weld. The fittings are provided with an integral heating element by which the supply electrical energy is transformed into heat in order to realise a sound fusion joint. The following types of electrofusion fittings as meant by this definition can be recognized, e.g. T-piece, bends and reducers. So-called electrofusion socket fittings also fall under this definition Butt fusion fittings Fittings by which the connection is made by means of a butt fusion weld. These fittings often have relatively short spigot-ends making electrofusion welds not suitable Socket fusion fittings A joint between a pipe and a fitting realised by melting together the outer layer of the pipe and medium layer of the fitting. The melting of the material is realised by a solid body with the appropriate temperature that is in contact with the material concerned during a certain amount of time: Socket shape for the pipe and spigot-shaped for the fitting. The material is first melted, after which the pipe and fitting are pushed together till the required installation position is obtained Mechanical connections A connection between a pipe and a fitting, made by means of pressing a ring or case over the outside diameter of the pipe, with or without extra sealing elements and possibly making use of a supporting ring in the pipe, according to NEN EN ISO Permanent mechanical fittings Mechanical fittings unmountable after installation. 2.2 Geometrical terminology and definitions Nominal size (DN) Numerical designation of the size of a component, rounded to a round number and approximately equal to the manufacturing dimension in millimetres (mm) Nominal outside diameter (d n) The specified outside diameter (in mm) assigned to a nominal size DN Outside diameter (at any point) (d e) Value of the measurement of the outside diameter through its cross-section at any point of the pipe or spigot end, rounded to the nearest 0,1 mm Comments before 11 January 2013

10 2.2.4 Mean outside diameter (d em) Value of the measurement of the outer circumference of the pipe or spigot end of a fitting in any cross section divided by π (=3,142), rounded to the next greater 0,1 mm Minimum mean outside diameter (d em, min) Minimum value of the outside diameter as specified for a given nominal size Maximum mean outside diameter (d em, max) Maximum value of the outside diameter as specified for a given nominal size Internal diameter (at any point) (d i) The measured internal diameter of the pipe at any point, rounded to the nearest 0,1 mm Out-of-roundness The 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 or the difference between the measured maximum inside diameter and measured minimum inside diameter of the same cross-section of an insert fitting Nominal wall thickness (e n) Numerical designation of the wall thickness of a component, approximately equal to the manufacturing dimensions in millimetres (in mm) Wall thickness (at any point) (e) The measured value of the wall thickness measured at any point around the circumference, rounded to the nearest 0,1 mm Minimum wall thickness (e min) The minimum value of the wall thickness measured at any point around the circumference Maximum wall thickness (e max) The maximum value of the wall thickness measured at any point around the circumference Tolerance The permitted variation of the specified value of a quantity expressed as the difference between the permissible maximum and permitted minimum values Pipe series (S) Dimensionless number for pipe designation according to ISO Standard Dimension Ratio (SDR) Ratio of the nominal outside diameter, d n, of a pipe to its nominal wall thickness, e n NOTE In accordance with ISO 4065, the standard dimension ratio SDR and the pipe series S are related as SDR = 2 S Comments before 11 January 2013

11 Calculated pipe value (S calc) Value for a specific pipe, rounded to the nearest 0,1 mm and calculated according to the following equation. S calc d n e 2 e n n In which: d n = the nominal outside diameter (mm); e n = the nominal wall thickness (mm). 2.3 Terminology and definitions related to service conditions Lifetime The time during which the piping system has to function with a certain operating temperature Design pressure (p D). The allowable pressure in the piping system, that during continuous use, during 50 years may occur Overall service coefficient (C) Overall coefficient, with a value greater than one, which takes into consideration service conditions as well as the properties of the components of a piping system other than those represented in the LPL value Hydrostatic stress Stress in the circumference direction of the pipe wall caused by internal water pressure. This stress is deduced from the internal pressure according to the following formula: p dem e 20 e min min In which: = the stress in the circumference direction of the pipe wall in MPa p = the internal pressure in bar; d em = the mean outside diameter of the pipe in mm; e min = the minimum wall thickness of the pipe in mm. LPL An unit expressed in wall stress, that represents the value of the 97,5 % lower confidence interval of the predicted stress for a single value at a temperature T and a time t. LTHS An unit expressed in wall stress, that represents the value of the 50 % lower confidence interval of the predicted stress for a single value at a temperature T and a time t Comments before 11 January 2013

12 2.3.7 Minimum required strenght(mrs) (depending on the material) Value of σ LPL at 20ºC and 50 years, rounded down to the next lower value of the R10 series when σ LPL is below 10 MPa, or to the next lower value of the R20 series when σ LPL is 10 MPa or greater. Note: R10 and R20 series are the Reynard number series conforming ISO 3:1973 and ISO 497: LPL The lower confidence interval. A statistical unit representing the point above which 97,5 % of all values are found Reference line A general description of the expected minimum long-term stress of a specific material. The reference lines are parallel to the calculated LTHS for a certain temperature. At least 97,5 % of all individual values found must have a value above the reference line. 2.4 Symbols C d e d em d em,min d em,max d n e e max e min e n p p D S calc T t σ σ D σ DF σ DP σ F σ P σ LPL overall service coefficient outside diameter (at any point) mean outside diameter minimum mean outside diameter maximum mean outside diameter nominal diameter wall thickness at any point maximum wall thickness at any point minimum wall thickness at any point nominal wall thickness pressure design pressure calculated S value temperature time hydrostatic stress design stress design stress of plastics fitting material design stress of plastics pipe material hydrostatic stress of plastics fitting material hydrostatic stress plastics pipe material hydrostatic stress at the lower confidence interval Comments before 11 January 2013

13 2.5 Abbreviations DN nominal size DN/OD nominal size related to the outside diameter PE polyethylene PB polybutene PE-X crosslinked polyethylene PE-RT II polyethylene of raised temperature resistance type II MFR melt flow rate MRS Minimum required strength OIT Oxidation Induction Time Comments before 11 January 2013

14 3 Procedure for obtaining the quality declaration 3.1 Pre-certification tests The pre-certification tests to be carried out by the certification body, take place in accordance with the performance and product requirements as embodied in this evaluation guideline, including test methods and depending on the nature of the product to be certified: (Sample)tests, in order to determine whether the products fulfil the product and/or performance requirements; Evaluation of the production process; Evaluation of the quality system and the IQC-scheme; Assessment of the presence and functioning of other required procedures; Evaluation of the installation instructions of the supplier. 3.2 Issue of the certificate After completion of the pre-certification tests, the results are presented to the decision-maker. The decision-maker evaluates the results and determines whether the certificate can be issued or whether additional information and/or tests are required in order to be able to issue the certificate Comments before 11 January 2013

15 4 General requirements and test methods 4.1 General In this chapter the performance requirements imposed on the piping system are included, as well as the determination methods in order to be able to determine whether the requirements are fulfilled. This guideline describes systems till the connection from the forward and reverse pipe to the manifold. In general we will distinguish two different systems namely: Standard vertical and coaxial systems see 4.2 Horizontal systems see 4.3 See figure 1 Figure 1: Vertical and horizontal geothermal systems 4.2 Standard vertical and coaxial systems Standard vertical geothemal system The system consists of a probe foot, which is connected to the forward and reverse pipe ( the geothermal probe), these geothermal probes (reverse and forward) will be connected to a manifold (not part of this guideline). See figure Coaxial geothemal system Consists of an inner and an outer pipe (pipe in pipe system), the forward pipe is the inner pipe which ends in the outer pipe(reverse pipe) or the forward pipe is the outer pipe which ends in the inner pipe(reverse pipe). The reverse and forward pipe will be connected to a manifold(not part of this guideline). See figure Comments before 11 January 2013

16 Figure 2: standard vertical system Only complete systems will be certified, which consists of the following parts if relevant: 1) Connection to the manifold; 2) Forward and reverse pipe(horizontal pipes); 3) Headpiece/Y piece; 4) Geothermal probe; 5) Probe foot + protective cover; 6)Weight for the geothermal probe. Figure 3: Coaxial vertical system The coaxial vertical system consists of the following parts: 1) Connection to the manifold; 2) Forward and reverse pipe(horizontal pipes); 3) Geothermal probe(coaxial); 4) Probe foot + protective cover; 5)Weight for the geothermal probe Comments before 11 January 2013

17 Figure 4: Geothermal probe Probe foot of geothermal probe Remark: Only prefab geothermal probes are allowed Internal flow maximum flow resistance according to VDI 4640 shall have a maximum of 10 mbar at 1 m/s at 20ºC with water Material PE see annex A, annex B for PE-X, annex C for PB and annex D for PE- RT II. The probe foot must have the same wall thickness as the pipe. Remark: Thinner wall thicknesses are possible for the probe foot, the probefoot must have the same mechanical strength as the pipe, for instance the probe foot is mould in resin Construction of the nozzle In case a weight is used on the nozzle during insertion in the drill hole, the following applies: The construction of the nozzle shall be such that during installation the weight will not deform the nozzle: The applied weight shall be according to the manufacturers technical handbook The construction (drawing) of the nozzle is part of the approved system Deformation forces on the nozzle The resistance against deformation shall be tested as follows: - Testmethod according to EN 712, the value of the pull force is described herafter; Comments before 11 January 2013

18 - The pull force for this test on the (mechanical) joint shall be at least twice the weight according to the manufacturer s technical handbook. - The point of action of this force is the same as the point of action of the weight; - After this test no deformation of the nozzle will occur Geothermal probe Requirements of the pipes annex A for PE,, annex B for PE-X, annex C for PB and annex D for PE-RT II Distance holders In case distance holders are part of the system, any relevant information shall be part of the installation instructions. 4.3 Horizontal systems General The system consists of pipe loops which are installed at least 1.2 meter below surface, with a maximum installation depth of 5 meter below surface. The loops will be connected to a manifold(not part of this guideline). The minimum bending diameter is according to the manufacturers technical handbook. See figure 4 Figure 5: Horizontal systems Comments before 11 January 2013

19 4.3.2 Class The temperature profile is according to class cold Mechanical requirements For the mechanical requirements of the pipes see annex A for PE, annex B for PE-X, annex C for PB and annex D for PE-RT II For the mechanical requirements of the fittings see annex A for PE, annex B for PE-X, annex C for PB and annex D for PE-RT II For the mechanical requirements of the joints see and Horizontal distribution pipes General The horizontal pipe network starts from the last joint of the geothermal probe up to the connection with the manifold. Remark: welded fittings shall be used when connections are not accessible Pipes For the requirements of the pipes: annex A for PE, annex B for PE-X, annex C for PB and annex D for PE-RT II are applicable Joints The requirements of the joints in 4.8 are applicable Fittings For the fittings of PE (class cold) the requirements in shall be followed For the fittings of PE-X, PB and PE-RT II (class cold and hot) annex B for PE-X, annex C for PB and annex D for PE-RT II shall be followed. 4.5 Lifetime of the system The complete piping system must be designed for a lifetime expectancy of 50 years. 4.6 Heat transport fluid The heat transport fluid has no negative influence on the piping system, no permeation of dangerous substances through the pipe wall. When a monopropyleen glycol/water combination is used no testing is necessary. For other fluids: an absorption of no more than 1 % is allowed. Other fluids than monopropyleen glycol/water combination shall be approved by the Certification Institute. Test method according to chapter 13, annex E. 4.7 Environment No leaching and migration of heat transport fluid. This is aspect is tested with the leaktightness testing. See table 4 and Comments before 11 January 2013

20 4.8 Requirements for the joints For the geothermal probe: only welded fittings are allowed, with at least the same SDR value as the probe pipe. For the horizontal part: (between the geothermal probe and the manifold): - When unaccessible, only welded fittings are allowed; - When this part can be serviced : changeable fittings are possible according to General The joints in the piping system have to be tested with regard to their proper functioning. In this chapter all joint tests required for the joint system are included. The combination of a (possible) rubber seal, pipe, (possible) supporting insert and clamp construction in the fitting have to be tested Rubber Rubber seals shall fulfill the requirements according to BRL 2013 for the herein described appropriate temperature. The manufacturer has to declare to the approval body which type of rubber is applied, as well as the hardness and dimensions of the rubber seals Joints in the geothermal probe(foot) For class hot and cold only prefab welded connections are allowed Comments before 11 January 2013

21 4.8.4 Welding methods In case of the use of welded joints, the methods in table 2 shall apply. Table 2 Welding methods Pipes Fitting Jointing method Remark PE 100 PE 100 BW, EF, SW DVS PE 100 PE-RT type II BW, EF, SW DVS PE-RT type II PE 100, PE-RT type II BW, EF, SW DVS PE-X PE100 EF DVS PB-1 PB-1 EF, SW DVG-W534 Remark: For PE buttwelding NEN7200 can also be applied. BW = Butt welded joint EF = Electrofusion joint SW = Socket welded joint Jointing requirements class cold(pe100) General The joints of the piping system shall be tested with regard to their proper functioning. In this chapter all joining tests are included necessary for the joining system PE: Tightness and strength of the joints The tests shall be carried out in accordance with EN The length of the PE pipe samples shall be 10d n with a minimum of 500 mm. In case possible, the pipe samples shall be of a higher pressure class than the fittings. In case not otherwise indicated, the test temperature shall be (23 2) C. Table 3 Test conditions for determination of the tightness and strength of the joints Type pipe material Test temperature C Pipe wall stress σ (N/mm²) Test duration (h) PE ,4 8,5 6,5 5, Note 1. The 1000 h tests at 60 0 C or 80 0 C (depending on the material) shall be used for precertification tests and yearly inspections. The other testing times can be used for production control. Note 2. For the calculation of the water pressure, e min and d n of the PE pipe with the pressure class corresponding to the pressure class of the fitting shall be taken as point of departure Comments before 11 January 2013

22 The joints for PE geothermal probes shall conform to the requirements given in table 4. Table 4 - Tightness and strength of the joints in PE systems Aspect Requirement Test parameters Test method Strength of the joints No leakage Minimum See table 3 ISO 1167 three joints Resistance to frost Leak tightness at under pressure Resistance to bending 63 mm Resistance to tensile load No damages or T= (-20 2) 0 C breakage t= 24 h P 0,05 bar t = (90 1) min. P= -0,8 bar Three test pieces No leakage T = ( C) t = (60 1) min. Three test pieces P1,5x PN of the pipe No detachment of pipe and fitting and no scratches or breakage t = (60 1) min. T= 23 0 C Three test pieces L= 3 x d n See EN for more details about the test parameters. Remark: for joints class Cold for systems of PEX, PB and PE-RT II see Annex F EN EN 713 EN Comments before 11 January 2013

23 4.8.6 Jointing requirements class cold and hot for PEX, PB and PE-RT-II systems The fittings shall not deform during testing in accordance with table 5. After testing, the pipe ends shall show no severe damages. If not otherwise stated, the testing temperature is (23 2) C. Table 5 - Tightness and strength of the joints of the service pipe PE-X, PB and PE-RT-II Aspect Resistance to thermal cycling Resistance to pull-out Resistance to frost Leak tightness under vacuum Leak tightness under internal pressure and bending Resistance to internal Require- ment no leakage no leakage No damages or breakage bar no leakage Test parameters n = 1000 cycli4) 6) Tmax = 93 2 C 1) Tmin = 23 2 C 2) tcyclus= 30 min 3). Pd (bar) One test piece t = 60 1 min. Three test pieces F = 1,5 * /4 * Dn2 * Pd (N) T= (-20 2) C t= 24 h t = 60 1 min. Three test pieces P= -0,8 bar t = 60 1 min. Three test pieces 5) See table 5b Leak tightness under internal pressure and bending t = 1000 h hydrostatic T = 95 C no leakage pressure Three test pieces See table 5c testpressure for tightness and strength of the joints. 1) Maximum test temperature of the water 2) Minimum test temperature of the water 3) for d 110mm tcyclus= tmax + tmin (= = 30 min) for d > 110mm tcyclus= tmax + tmin (= = 60 min) 4) for d > 110mm counts n = 500 5) only pipes < 63 mm General remark: These values are calculated like those in part 5 of the product standards using the design stress calculated for the temperature profile and the 1000 h/95 ºC values (resistance to internal pressure ISO1167) Test method NEN-EN NEN-EN 712 Annex F NEN-EN NEN-EN 713 NEN-EN-ISO Comments before 11 January 2013

24 Table 5a - Tightness and strength of the joints in PE-X, PB and PE-RT-type II systems Aspect Jointing system PE-X PB PE-RT-II Resistance to thermal cycling M+EF M+SW+EF M+SW+EF Resistance to pull-out M M M Resistance to frost M M M Leak tightness under vacuum M M Leak tightness under internal pressure and bending M M M Resistance to internal hydrostatic pressure M+ EF M+SW+EF M+SW+EF SW = Socket Fusion joint EF = Electro fusion joint M = Mechanical joint Table 5b - test pressure leak tightness under internal pressure and bending class cold Test pressure with operating temperature 40ºC Service pipe type P (bar) PE-X 17,6 22,1 33,1 44,1 55,1 PB 16,1 20,2 30,3 40,4 50,4 PE-RT type II 18,9 23,7 35,5 47,3 59,2 Table 5c - test pressure leak tightness under internal pressure and bending class hot Test pressure with operating temperature 70ºC Service pipe type P (bar) PE-X 24,8 31,0 46,5 62,0 77,5 PB 24,5 30,6 45,9 61,3 76,6 PE-RT type II 28,4 35,5 53,3 71,1 88, Comments before 11 January 2013

25 Table 5d - test pressure for tightness and strength of the joints class cold Service pipe type Test pressure with operating temperature 40ºC P (bar) PE-X 7,1 8,8 13,3 17,7 22,1 PB 6,2 7,8 11,7 15,6 19,5 PE-RT type II 5,7 7,1 10,6 14,1 17,7 Table 5e - test pressure for tightness and strength of the joints class hot Service pipe type Test pressure with operating temperature 70ºC P (bar) PE-X 9,9 12,4 18,6 24,8 31,0 PB 9,5 11,8 17,8 23,7 29,6 PE-RT type II 8,5 10,6 15,9 21,2 26,5 4.9 Metal fittings Remark: Only for accessible areas in horizontal pipes general When metal fittings in the system are allowed, the following applies: The requirements of ISO 1338 and DIN shall be met. The applied materials shall be corrosion resistant or protected against corrosion and may not give cause to mutual contact corrosion. The wall thickness of the metal fittings, in any cross-section of the fittings, may not be smaller as indicated in table Appearance The inside and outside surface of the fittings shall be smooth, sound and clean, free of bubbles, holes, cracks or other irregularities. No contaminations in the material are allowed. The metal clamp fittings shall conform to the requirements given in table Comments before 11 January 2013

26 4.9.3 Physical and mechanical requirements for metal fittings Table 6 Physical and mechanical requirements for metal fittings Aspect Requirement Test parameter Test method Material composition NEN-EN IQC 1) Specification manufacturer Rubber BRL BRL 2013 Dimensions NEN-EN Minimum wall thickness ISO or ISO 7-1 Construction NEN-EN Construction drawings ISO 3126 Strength fitting body Resistance to NEN-EN ISO 1167-series internal hydraulic pressure par. 5.1 Resistance to stress corrosion No cracks PH 9,5 EN-ISO ) Information laid down in the IQC as a part of the agreement with the certification body 4.10 Installation instructions The supplier shall provide installation instructions in the Dutch language(komo- Guideline version) or relevant language. A reference to these instructions shall be made at or near the packaging. The instructions must contain specific information with regard to storage, safety, transport, processing temperature, heat transport fluid, construction of the joints and specific installation guidelines. In the installation instructions there shall be mentioned measurements to avoid buckling of the piping system Certification mark for the geothermal probe and system After contracting the certification agreement, the outer casing shall be provided, at intervals of not more than 2m, with the following clearly legible and indelible markings: - KOMO ; - Class Cold or Class Hot; - pipe material: PE100 or "PE-X"; PB or PE-RT-II ; - Working pressure: xx bar; - SDR or S class: - Maximum temperature: 40 C or 70 C; - the nominal outside diameter(s) of the pipe(s) in mm and wall thickness; - the production code; - the system name; - Geothermal heat or Aardwarmte. - On the pipe the depth of the probe must be indicated every meter. The U-bend is the zero. - Flow indication mark on geothermal probe Comments before 11 January 2013

27 5 Quality system requirements 5.1 General This chapter contains the requirements that have to be met by the supplier s quality management system. 5.2 Manager of the quality system Within the organisational structure an employee must have been appointed who is in charge of managing the quality management system. 5.3 Internal quality control/quality plan The supplier must have an implemented and operational internal quality control scheme in place (IQC-scheme). In this IQC-scheme the following must be demonstrably recorded: which aspects are checked by the manufacturer; according to which methods these inspections are carried out; how often these inspections are carried out; how the inspection results are registered and stored; safety requirements for inspecting the pipes. This IQC-scheme shall be in the format as shown in the annex 1: Model IQC schema. The scheme must be detailed in such a way that it provides Kiwa sufficient confidence that the requirements of this evaluation guideline are continuously fulfilled. 5.4 Procedures and work instructions The supplier must be able to submit: procedures for: o the handling of non-conforming products; o corrective actions in case non-conformities are found; o the handling of complaints regarding the products and/or services supplied; the work instructions and inspection sheets in use. 5.5 Other requirements imposed on the quality system In case the quality system of the supplier is certified on the basis of ISO 9001, a combination can be made with the IQC-scheme Comments before 11 January 2013

28 6 Summary of tests and inspections 6.1 Test matrix The table below contains a summary of the tests and inspections to be carried out in the event of certification. Description of requirement General requirements Article BRL Tests within the scope of Precertification tests Supervision by CI after granting of the certificate 1) Inspection visit 2) Frequency (per year) Installations instructions 4.10 X X 1 x year Marking 4.11 X X 1 x year Internal flow X - - Construction of the probe foot X - - Deformation forces on the probe foot X X 1 x year Heat transport fluid 4.6 X Requirements for the joints Rubber Seals X - - Welding methods X Requirements for the joints class cold (PE) Strength of the joints X X 1 x year Resistance to frost X - - Leak tightness under underpressure X - - Resistance to bending X - - Resistance to tensile load X - - Requirements for the joints class cold & hot (PE-X, PB and PE-RT-II) Resistance to thermal cycling X - - Restistance to pull-out X - - Resistance to frost X - - Leak tightness under underpressure X - - Leak tightness under internal pressure and bending X - - Resistance to internal hydrostatic pressure X X 1 x year Comments before 11 January 2013

29 Requirements for metal fittings material composition X X 1x year rubber sealing elements X appearance X X 1x year dimensions X X 1x year construction X strength body X resistance to stress corrosion X Material requirements class cold (PE) carbon black content X X 3) carbon black dispersion X X 1x year moisture content X X 1x year volatile components including water X X 1x year melt mass-flow rate X X 1x year nominal density at 23 C X Oxidation Induction Time (OIT) X Requirements for the pipes class cold (PE) material X X 1x year dimensions X X 1x year appearance X X 1x year long-term strength X X 3) melt mass-flow rate X X 1x year elongation at break X X 1x year weldability X resistance to internal hydrostatic pressure X X 1x year Requirements for the Plastic fittings(pom& PP) class cold (PE) material & X X 1x year appearance & X X 1x year dimensions X X 1x year long-term strength X X 3) 1x year influence of heating X X 1x year Resistance to internal hydrostatic pressure X X 1x year Comments before 11 January 2013

30 Requirements for the Plastic fittings(pe) class cold (PE) appearance X X 1x year MFR X X 1x year Oxidation Induction Time (OIT) X X 1x year Rubber seals X - - Requirements for butt- en elektrofusion fittings (PE) class cold material X X 1x year long-term strength X X 3) 1x year appearance X X 1x year weldability X dimension X X 1x jaar resistance to internal pressure X 1x jaar resistance to pull-out X resistance to detach for electrofusion fittings X MFR X 1x jaar Oxidation Induction Time (OIT) X 1x jaar Requirements for the pipes class cold & hot (PE-X, PB and PE-RT-II) Long term strength , & X - - Dimensions , & X X 1 x year Appearance , & X X 1 x year Degree of cross linking (only PE-X) X X 1 x year MFR & X X 1 x year Resistance to internal hydrostatic pressure , & X X 1 x year Thermal stability , & X - - Longitudinal reversion , & X - - Marking , & X X 1 x year Requirements for the fittings class cold & hot (PE-X, PB and PE-RT-II) Long term strength , & X - - Dimensions , & X X 1 x year Appearance , & X X 1 x year Degree of cross linking (only PE-X) , & X X 1 x year MFR , & X X 1 x year Thermal stability , & X - - Behaviour at heating , & X X 1 x year Marking , & X X 1 x year 1) In case the product or production process changes significantly, it must be determined whether the performance requirements are still met. 2) All product properties that can be determined within the visiting time (maximum 1 day) are determined by the inspector or by the supplier in the presence of the inspector. In case this is not possible, an agreement will be made between the certification body and the supplier about how the inspection will take place. 3) This aspect is compared with the for this aspect ascertained acceptance parameters on the basis of the IQC inspection (indirect by means of direct related parameters) Comments before 11 January 2013

31 6.2 Inspection of the quality system During the inspection visits the Kiwa inspector checks the internal quality system by verifying the IQC scheme Comments before 11 January 2013

32 7 Requirements imposed on the certification body 7.1 General The certification body has to be accredited for the subject of this BRL based on EN by the Dutch Accreditation Council. The certification body must have the disposal of a regulation, or an equivalent document, in which the general rules for certification are laid down. In particular these are: The general rules for carrying out the pre-certification, to be distinguished in: o The way suppliers are informed about the handling of the application; o Execution of the pre-certification; o The decision with regard to the pre-certification executed. The general rules with regard to the execution of inspections and the inspection aspects to be employed; The measures to be taken by the certification body in the event of nonconformities; Measurements taken by Kiwa in case of improper Use of Certificates, Certification Marks, Pictograms and Logos; The rules for termination of the certificate; The possibility of lodging appeal against decisions or measures made by the certification body. 7.2 Certification staff The staff involved in the certification is to be sub-divided into: Auditors/ certification engineers: in charge of carrying out the pre-certification tests and assessing the inspectors reports; Inspectors: in charge of carrying out external inspections at the supplier s works; Decision-makers: in charge of taking decisions in connection with the precertification tests performed, continuing the certification in connection with the inspections performed and taking decisions on the need of corrective actions Qualification requirements Qualification requirements consist of: Qualification requirements for executive staff of a CI that fulfil the requirements of EN 45011; Qualification requirements for executive staff of a CI that are in addition set up by the Board of Experts for the subject of this evaluation guideline. Certification staff must be demonstrably qualified by evaluation of education and experience of the above-mentioned requirements. In case qualification takes place on the basis of other criteria, then this has to be recorded in writing. The authority for qualification rests with: Decision-makers: qualification of the certification experts and inspectors; Management of the certification body: qualification of the decision-makers Comments before 11 January 2013

33 Education and experience of the involved certification staff must be demonstrably recorded Qualification requirements for executive staff of a CI that fulfill the requirements of EN The qualification of the executive staff of a CI must fulfil the requirements of chapter 5 of EN The way qualification of the staff is performed must be described in the quality manual of the CI. EN General education 2.Specific education 3.General experience 4. Specific experience Auditor Initial product evaluation and evaluation of the production site Higher professional working level basic training auditing specific training with regard to the technical field 1 year relevant work experience with a participation in at least 4 initial evaluations while 1 evaluation has been carried out independently under supervision Detailed knowledge of the certification scheme and 4 initial evaluations in which this BRL has been employed Inspector evaluation of the product, production site, field and projects after the initial issue of the certificate Intermediate professional working level basic training auditing specific training with regard to the technical field 1 year relevant work experience with a participation in at least 4 inspection visits while 1 inspection visit has been carried out independently under supervision Detailed knowledge of the certification scheme and 4 inspection visits in which this BRL has been employed Decision-maker With regard to the initial issue and extensions of the certificate Higher professional working level Not applicable 4 years work experience of which at least 1 year with respect to certification Basic knowledge of the specific certification scheme Qualification requirements for executive staff of a CI that are in addition set up by the Board of Experts for the subject of this evaluation guideline No additional requirements are set up by the CvD Comments before 11 January 2013

34 7.3 Qualification Certification staff must be demonstrably qualified by evaluation of education and experience of the above-mentioned requirements. In case qualification takes place on the basis of other criteria, then this has to be recorded in writing. The authority for qualification rests with: Decision-makers: qualification of the certification experts and inspectors; Management of the certification body: qualification of the decision-makers. 7.4 Report pre-certification tests The certification body records the results of the pre-certification tests in a report. The report must fulfil the following requirements: Completeness: the report judges about all requirements of the evaluation guideline; Traceability: the findings whereupon the judgements are based must be recorded in a traceable way; Basis for decision: the decision-maker with regard to granting of the certificate, must be able to base his decision upon the findings recorded in the report. 7.5 Decision with regard to the issue of the certificate The decision with regard to the issue of the certificate must be made by a qualified decision-maker, who was not involved at the pre-certification tests. The decision must be traceable recorded. 7.6 Quality declaration The (technical approval-with-)product certificate must be in accordance with the model as included in the annex 2: Example technical approval-with-product certicate. 7.7 Nature and frequency of external inspections The certification body must enforce inspections at the supplier s site to investigate whether the obligations are met. The Board of Experts advises about the number of inspection visits. At the time of validation of this evaluation guideline this frequency has been fixed at four inspection visits per year. In case the quality system of the supplier is certified on the basis of ISO 9001, the frequency is fixed at 2 inspection visits per year. Inspections shall invariably include: The IQC-scheme of the supplier and the results of tests carried out by the supplier; The correct marking of the certified products; The compliance with the required procedures. The findings of the inspection visits performed shall be traceably recorded, by the certification body, in a report. 7.8 Report to the Board of Experts The certification body reports at least once a year about the certification activities performed. In this reporting, the following subjects must be addressed: Mutations in number of certificates (new/cancelled); Number of inspections carried out in relation to the fixed frequency; Comments before 11 January 2013

35 Results of the inspections; Measures imposed in case of non-conformities; Complaints received from third parties concerning certified products. 7.9 Interpretation of requirements The Board of Experts may lay down the interpretation of this evaluation guideline in a separate interpretation document. The certification body is obliged to inform whether an interpretation document is available. If this is the case, then the interpretations as laid down in the interpretation document must be employed Comments before 11 January 2013

36 8 List of mentioned documents 8.1 Standards / normative documents: Number Title NEN 7200 Plastics piping systems for the transport of gas, drinking water and waste water, butt welding of pipes and fittings of PE, with a density of 930 kg/m3. ASTM 1603; Test for carbon black in olefin plastics. EN-ISO 580 Plastic piping and ducting systems Injection-moulded thermoplastic fittings Methods for visually assessing the effects of heating. ISO 4607 ( ) Plastics- Methods of exposure to natural weathering. NEN-EN 681 EN 712 EN 713 EN-ISO 1133 EN-ISO 1167-serie NEN-EN ISO 2505 ISO 3126 NEN-EN-ISO 6708 EN-ISO 6957 ISO 9080 EN Elastomeric seals - Materials requirements for pipe joint seals used in water and drainage applications - Part 1:Vulcanized rubber. Thermoplastics plastics piping systems End-load bearing mechanical joints between pressure pipes and fittings Test method for resistance to pull-out under constant longitudinal force. Plastics piping systems Mechanical joints between fittings and polyolefin pressure pipes Test method for leak tightness under internal pressure of assemblies subjected to bending. Determination of the melt mass flow rate (MFR) and the melt volume (MVR) of thermoplastics. Plastics piping systems - Thermoplastics pipes - Determination of the resistance to internal pressure at constant temperature, Copper and copper alloys plumbing fittings Part 3: Fittings with compression ends for use with plastic pipes. Plastics piping and ducting systems Thermoplastic pipes. Determination of the longitudinal reversion. Plastics piping systems Plastics components Determination of dimensions. Pipework components. Definition and selection of DN (nominal size). Copper alloys Ammonia test for stress corrosion in resistance. Plastics piping and ducting systems Determination of long-term hydrostatic strength of thermoplastics material in pipe form by extrapolation. Method of test for leak tightness under vacuum Comments before 11 January 2013

37 ISO ISO EN BRL2013 ISO 4065: 1996 NEN-EN 579:1994 NEN-EN-ISO/IEC 17020: 2004 NEN-EN-ISO/IEC 17024: 2003 NEN-EN-ISO/IEC 17025; 2005 NEN-EN-ISO 15875: 2004 NEN-EN-ISO 15876: 2004 EN-ISO Plastics pipes for the conveyance of fluids under pressure Miner's rule Calculation method for cumulative damage. Fittings, valves and other piping system components of unplasticized PVC-U for pipes under pressure- Resistance to internal pressure- test method. Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE). Vulcanized rubber pipe joint seals for waste water pipes Thermoplastic pipes - Universal wall thickness table. Plastics piping systems. Crosslinked polyethylene (PE-X) pipes. Determination of degree of crosslinking by solvent extraction General criteria for the operation of various types of bodies performing inspection Conformity assessment - General requirements for bodies operating certification of persons General requirements for the competence of testing and calibration laboratories Plastics piping systems for hot and cold water installations Crosslinked polyethylene (PE-X) Plastics piping systems for hot and cold water installations Polybutylene (PB) Plastics piping systems for industrial applications Polybutene (PB), polyethylene (PE) and polypropylene(pp) - Specifications for components and the system -Metric series NEN-EN-ISO Plastics piping systems for hot and cold water installations - Polyethylene of raised temperature resistance (PE-RT) Comments before 11 January 2013