SIST EN 1555-3:2010+A1:2013
(Main)Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
This European Standard" specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels. It also specifies the test parameters for the test methods referred to in this standard. In conjunction with Parts 1, 2, 4 and 5 of EN 1555, it is applicable to PE fittings, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure, MOP, up to and including 10 bar); b) an operating temperature of 20 °C as reference temperature. EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours and additives. This European Standard is applicable for fittings of the following types: c) electrofusion socket fittings; d) electrofusion saddle fittings; e) spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion); f) mechanical fittings. The fittings can e.g. be in the form of couplers, equal and reduced tees, reducers, bends or caps.
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 3: Formstücke
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylène (PE) - Partie 3 : Raccords
La présente !Norme européenne" spécifie les caractéristiques des raccords soudables en polyéthylène (PE) ainsi que celles des raccords mécaniques fabriqués pour les systèmes de canalisations destinées à la distribution de combustibles gazeux.
Elle spécifie également les paramètres d'essai des méthodes d'essai auxquelles la présente norme fait référence.
Conjointement avec les parties 1, 2, 4 et 5 de l’EN 1555, elle s'applique aux raccords en PE et à leurs assemblages, ainsi qu'à leurs assemblages avec des composants en PE et autres matières, destinés à être utilisés dans les conditions suivantes :
a) une pression maximale de service, MOP, jusque et y compris 10 bar 1) ;
b) une température de service de 20 °C, comme température de référence.
NOTE 1 Pour d'autres températures de service, il convient d’utiliser des facteurs de réduction, voir l’EN 1555 5.
L’EN 1555 (toutes les parties) concerne une gamme de pressions maximales de service et donne les exigences concernant les couleurs et les additifs.
NOTE 2 Il est de la responsabilité de l'acheteur ou du prescripteur de faire le choix approprié de ces différents aspects, en prenant en compte les exigences particulières et les règlements nationaux correspondants ainsi que les pratiques ou codes de pose.
La présente Norme européenne est applicable aux raccords des types suivants :
a) raccords à emboîture électrosoudable ;
b) selles électrosoudables ;
c) raccords à bout mâle (pour soudage bout à bout à l'aide d'outils chauffants et pour soudage par emboîture électrosoudable) ;
d) raccords mécaniques.
Les raccords peuvent être, par exemple, des manchons, des tés égaux, des tés réduits, des réductions, des coudes ou des bouchons.
Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 3. del: Fitingi
Ta evropski standard določa značilnosti spojnih fitingov iz polietilena (PE) in mehaničnih fitingov za cevne sisteme na področju oskrbe s plinastimi gorivi. Določa tudi preskusne parametre za preskusne metode iz tega standarda. V povezavi z deli 1, 2 ,4 in 5 standarda EN 1555 se uporablja za fitinge iz polietilena, njihove spoje ter spoje s komponentami iz polietilena in drugih materialov, namenjene uporabi v naslednjih pogojih: a) najvišji obratovalni tlak obratovalni tlak MOP do vključno 10 bar); b) delovna temperatura 20 °C kot referenčna temperatura. Standard EN 1555 (vsi deli) zajema razpon najvišjih obratovalnih tlakov in določa zahteve glede barv in aditivov. Ta evropski standard se uporablja za naslednje vrste fitingov: c) elektrofuzijski vtični fitingi; d) elektrofuzijski fitingi s sedlom; e) fitingi s spojnimi zatiči (za spajanje koncev z uporabo segretih orodij in spajanje s pomočjo elektrofuzijskega vtiča); f) mehanični fitingi. Fitingi so lahko npr. v obliki spojnikov, enakih ali zmanjšanih priključkov T, regulatorjev, kolen ali kapic.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 3. del: FitingiKunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 3: FormstückeSystèmes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylène (PE) - Partie 3 : RaccordsPlastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings91.140.40Sistemi za oskrbo s plinomGas supply systems83.140.30Cevi, fitingi in ventili iz polimernih materialovPlastics pipes, fittings and valvesICS:Ta slovenski standard je istoveten z:EN 1555-3:2010+A1:2012SIST EN 1555-3:2010+A1:2013en,fr,de01-februar-2013SIST EN 1555-3:2010+A1:2013SLOVENSKI
STANDARDSIST EN 1555-3:20101DGRPHãþD
SIST EN 1555-3:2010+A1:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1555-3:2010+A1
November 2012 ICS 23.040.45 Supersedes EN 1555-3:2010English Version
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
Systèmes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylène (PE) - Partie 3 : Raccords
Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 3: Formstücke This European Standard was approved by CEN on 30 July 2010 and includes Amendment 1 approved by CEN on 4 September 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1555-3:2010+A1:2012: ESIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 2 Contents Page Foreword .4Introduction .61 Scope .72 Normative references .73 Terms and definitions, symbols and abbreviations .94 Material . 104.1 PE Compound . 104.2 Material for non-polyethylene parts . 104.2.1 General . 104.2.2 Metal parts . 104.2.3 Elastomers . 104.2.4 Other materials . 105 General characteristics . 115.1 Appearance . 115.2 Colour . 115.3 Design . 115.4 Appearance of factory made joints . 115.5 Electrical characteristics for electrofusion fittings . 116 Geometrical characteristics . 126.1 Measurement of dimensions . 126.2 Dimensions of electrofusion socket fittings . 126.2.1 Diameters and lengths of electrofusion sockets . 126.2.2 Wall thicknesses . 136.2.3 Out-of-roundness of the bore of a fitting (at any point). 146.2.4 Spigots . 146.2.5 Other dimensions . 146.3 Dimensions of electrofusion saddle fittings . 146.4 Dimensions of spigot end fittings . 156.4.1 Diameters and lengths . 156.4.2 Wall thickness of the fusion end . 176.4.3 Wall thickness of the fitting body . 176.4.4 Other dimensions . 186.5 Dimensions of mechanical fittings . 186.5.1 General . 186.5.2 Mechanical fittings with polyethylene spigot ends . 186.5.3 Mechanical fittings with polyethylene electrofusion sockets . 186.5.4 Threads . 187 Mechanical characteristics . 187.1 General . 187.2 Requirements . 197.3 Performance requirements . 218 Physical characteristics . 218.1 Conditioning . 218.2 Requirements . 219 Performance requirements . 2210 Marking . 2210.1 General . 2210.2 Minimum required marking of fittings . 22SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 3 10.3 Additional marking . 2310.4 Fusion system recognition . 2311 Delivery conditions . 23Annex A (informative)
Examples of typical terminal connection for electrofusion fittings . 24Annex B (normative)
Short-term pressure test method . 26B.1 Principle. 26B.2 Apparatus . 26B.3 Test piece . 26B.4 Procedure . 26B.5 Test report . 27Annex C (normative)
Tensile test for fitting/pipe assemblies . 28C.1 Principle. 28C.2 Apparatus . 28C.3 Test piece . 28C.4 Procedure . 28C.5 Test report . 28Bibliography . 30 SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 4 Foreword This document (EN 1555-3:2010+A1:2012) 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 May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. Attention is drawn 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. This document includes Amendment 1 approved by CEN on 4 September 2012. This document supersedes !EN 1555-3:2010". The start and finish of text introduced or altered by amendment is indicated in the text by tags !". !Due to Amendment 1 to EN 1555-3:2010, this document comprises technical changes to: Subclause 7.2, Requirements; Subclause 10.2, Minimum required marking of fittings." EN 1555 consists of the following parts: EN 1555-1, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 1: General;
EN 1555-2, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 2: Pipes; EN 1555-3, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings (this standard); prEN 1555-4, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 4: Valves; EN 1555-5, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 5: Fitness for purpose of the system; CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 7: Guidance for assessment of conformity. NOTE EN 12007-2:2000 [1] prepared by CEN/TC 234 “Gas infrastructure” deals with the recommended practice for installation of plastics pipes system in accordance with EN 1555 (all parts). System Standards are based on the results of the work being undertaken in ISO/TC 138 "Plastics pipes, fittings and valves for the transport of fluids", which is a Technical Committee of the International Organization for Standardization (ISO). They are supported by separate standards on test methods to which references are made throughout the System Standard. The System Standards are consistent with general standards on functional requirements and on recommended practice for installation. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 5 According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 6 Introduction The System Standard, of which this is Part 3, specifies the requirements for a piping system and its components made from polyethylene (PE) and which is intended to be used for the supply of gaseous fuels. Requirements and test methods for material and components, other than fittings, are specified in
EN 1555-1, EN 1555-2 and prEN 1555-4 [9].
Characteristics for fitness for purpose are covered in EN 1555-5. CEN/TS 1555-7 [2] gives guidance for assessment of conformity. Recommended practice for installation is given in EN 12007-2:2000 [1] prepared by CEN/TC 234.
This part of EN 1555 covers the characteristics of fittings. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 7 1 Scope This !European Standard" specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels. It also specifies the test parameters for the test methods referred to in this standard. In conjunction with Parts 1, 2, 4 and 5 of EN 1555, it is applicable to PE fittings, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure, MOP, up to and including 10 bar 1); b) an operating temperature of 20 °C as reference temperature. NOTE 1 For other operating temperatures, derating coefficients should be used; see EN 1555-5. EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours and additives. NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. This European Standard is applicable for fittings of the following types: c) electrofusion socket fittings; d) electrofusion saddle fittings; e) spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion); f) mechanical fittings. The fittings can e.g. be in the form of couplers, equal and reduced tees, reducers, bends or caps. 2 Normative references !The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies." EN 682:2002, Elastomeric Seals
Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids EN 1555-1:2010, Plastics piping systems for the supply of gaseous fuels
Polyethylene (PE)
Part 1: General EN 1555-2, Plastics piping systems for the supply of gaseous fuels
Polyethylene (PE)
Part 2: Pipes EN 1555-5, Plastics piping systems for the supply of gaseous fuels
Polyethylene (PE)
Part 5: Fitness for purpose of the system EN 1716, Plastics piping systems
Polyethylene (PE) tapping tees
Test method for impact resistance of an assembled tapping tee
1) 1 bar = 0,1 MPa. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 8 EN 10226-1, Pipe threads where pressure tight joints are made on the threads
Part 1: Taper external threads and parallel internal threads
Dimensions, tolerances and designation EN 10226-2, Pipe threads where pressure tight joints are made on the threads
Part 2: Taper external threads and taper internal threads
Dimensions, tolerances and designation EN 12117, Plastics piping systems
Fittings, valves and ancillaries
Determination of gaseous flow rate/pressure drop relationships EN ISO 228-1:2000, Pipe threads where pressure-tight joints are not made on the threads
Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 1133, Plastics
Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (ISO 1133:2005) EN ISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 1: General method (ISO 1167-1:2006) EN ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 4: Preparation of assemblies (ISO 1167-4:2007) EN ISO 3126, Plastics piping systems
Plastics components
Determination of dimensions (ISO 3126:2005) ISO 10838-1 2), Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels
Part 1: Metal fittings for pipes of nominal outside diameter less than or equal to 63 mm ISO 10838-2 2), Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels
Part 2: Metal fittings for pipes of nominal outside diameter greater than 63 mm ISO 10838-3 2), Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels
Part 3: Thermoplastic fittings for pipes of nominal outside diameter less than or equal to 63 mm ISO 11357-6:2008, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) ISO 13950, Plastics pipes and fittings — Automatic recognition systems for electrofusion joints
ISO 13951:2001, Plastics piping systems — Test method for the resistance of polyolefin pipe/pipe or pipe/fitting assemblies to tensile loading
ISO 13953, Polyethylene (PE) pipes and fittings
Determination of the tensile strength and failure mode of test pieces from a butt-fused joint ISO 13954, Plastics pipes and fittings
Peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm ISO 13955, Plastics pipes and fittings
Crushing decohesion test for polyethylene (PE) electrofusion assemblies ISO/FDIS 13956, Plastics pipes and fittings
Determination of cohesive strength
Evaluation of ductility of fusion joint interface by tear test
2) Under revision. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 9 3 Terms and definitions, symbols and abbreviations For the purposes of this document, the terms and definitions, symbols and abbreviations given in
EN 1555-1:2010 and the following apply. 3.1 electrofusion socket fitting polyethylene (PE) fitting which contains one or more integral heating elements, that are capable of transforming electrical energy into heat to realise a fusion joint with a spigot end or a pipe 3.2 electrofusion saddle fitting polyethylene (PE) fitting which contains one or more integral heating elements, that are capable of transforming electrical energy into heat to realise a fusion joint onto a pipe 3.2.1 tapping tee electrofusion saddle fitting (top loading or wrap round) which contains an integral cutter, to cut through the wall of the main pipe which remains in the body of the tapping tee after installation 3.2.2 branch saddle electrofusion saddle fitting (top loading or wrap round) which requires an ancillary cutting tool for drilling a hole in the adjoining main pipe 3.3 mechanical fitting fitting, that generally includes a compression part to provide pressure integrity, leaktightness and resistance to end loads, for assembling polyethylene (PE) pipe to another PE pipe or any other element of the piping system NOTE 1 A pipe-supporting sleeve providing a permanent support for a polyethylene (PE) pipe to prevent creep in the pipe wall under radial compressive forces, is applicable. The metallic parts of the fitting can be assembled to metallic pipes by screw-threads, compression joints, welded or flanged connections, including PE flanges. In some cases the supporting sleeve at the same time constitutes a grip ring. NOTE 2 The fitting can allow either a dismountable or permanently assembled joint. NOTE 3 The mechanical fitting can be supplied for field assembly or pre-assembled by the manufacturer. 3.4 spigot end fitting polyethylene (PE) fitting where the outside diameter of the spigot end is equal to the nominal outside diameter, dn, of the corresponding pipe 3.5 voltage regulation control of energy supplied, during the fusion process of an electrofusion fitting, by means of the voltage parameter 3.6 intensity regulation control of energy supplied, during the fusion process of an electrofusion fitting, by means of the current parameter SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 10 4 Material 4.1 PE Compound The PE compound from which the fittings are made shall conform to EN 1555-1. The stress bearing parts shall only be made from virgin material conforming to EN 1555-1. 4.2 Material for non-polyethylene parts 4.2.1 General All components shall conform to the relevant EN standard(s). Alternative standards may be applied in cases where the suitable EN standard(s) do not exist. In all cases fitness for purpose of the components shall be demonstrated. The materials and the constituent elements used in making the fitting (including elastomers and any metal parts as may be used) shall be as resistant to the external and internal environments as the other elements of the piping system and shall have a life expectancy under the following conditions at least equal to that of the PE pipes conforming to EN 1555-2 with which they are intended to be used: a) during storage; b) under the effect of the gas conveyed therein; c) with respect to the service environment and operating conditions. The requirements for the level of material performance of non-polyethylene parts shall be at least as stringent as that of the PE compound for the piping system. Reprocessed materials shall not be used for stress bearing polymeric parts. Other materials used in fittings in contact with the PE pipe shall not adversely affect pipe performance or initiate stress cracking. NOTE Clause 4.2 does not apply to non-stress bearing fitting parts. 4.2.2 Metal parts All metal parts susceptible to corrosion shall be adequately protected, providing this is necessary for the durability and function of the system. When dissimilar metallic materials are used which can be in contact with moisture, steps shall be taken to avoid the possibility of galvanic corrosion. 4.2.3 Elastomers Elastomeric seals shall conform to EN 682:2002. Other sealing materials are permitted if suitable for gas service. 4.2.4 Other materials Greases or lubricants shall not exude onto fusion areas, and shall not affect the long-term performance of fitting materials. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 11 5 General characteristics 5.1 Appearance
When viewed without magnification, the internal and external surfaces of fittings shall be smooth, clean and shall have no scoring, cavities and other surface defects to an extent that would prevent conformity to this standard. No component of the fitting shall show any signs of damage, scratches, pitting, bubbles, blisters, inclusions or cracks to an extent that would prevent conformity of the fittings to the requirements of this standard. 5.2 Colour The colour of the PE parts of fittings shall be either black, yellow, or orange. 5.3 Design
The design of the fitting shall be such that, when assembling the fitting onto the pipe or other component, electrical coils and/or seals are not displaced. 5.4 Appearance of factory made joints
The internal and external surfaces of the pipe and fitting after fusion jointing, examined visually without magnification, shall be free from melt exudation outside the confines of the fitting, apart from that which may be declared acceptable by the fitting manufacturer or used deliberately as a fusion marker. Any melt exudation shall not cause wire movement in electrofusion fittings such that it leads to short-circuiting, when jointed in accordance with the manufacturer's instructions. There shall be no excessive creasing of the internal surfaces of the adjoining pipes. 5.5 Electrical characteristics for electrofusion fittings The electrical protection that shall be provided by the fusion process depends on the voltage and the current used and on the characteristics of the electricity power source. For voltages greater than 25 V, direct human contact with energized parts shall not be possible when the fitting is in the fusion cycle during assembly in accordance with the instructions of the manufacturers of the fittings and of the assembly equipment, as applicable. NOTE 1 The fitting is during the fusion process part of an electrical system as defined in EN 60335-1 [3],
HD 60364-1 [4] and IEC 60449 [5].
The tolerance on the electrical resistance of the fitting at 23 °C shall be stated by the manufacturer. The resistance shall be between nominal resistance (-10%) and nominal resistance (+10%) + 0,1 . NOTE 2 0,1
is the assumed value of the contact resistance. The surface finish of the terminal pins shall allow a minimum contact resistance in order to satisfy the resistance tolerance requirements. NOTE 3 See Annex A, for examples of typical electrofusion terminal connections. SIST EN 1555-3:2010+A1:2013
EN 1555-3:2010+A1:2012 (E) 12 6 Geometrical characteristics 6.1 Measurement of dimensions
Dimensions shall be measured in accordance with EN ISO 3126 at (23 ± 2) °C, after being conditioned for at least 4 h. The measurement shall not be made less than 24 h after manufacture. NOTE Indirect measurement at the stage of production is allowed at shorter time periods providing evidence is shown of correlation.
6.2 Dimensions of electrofusion socket fittings 6.2.1 Diameters and lengths of electrofusion sockets For electrofusion sockets (see Figure 1) having a nominal diameter given in Table 1, the socket diameter and lengths shall be given by the manufacturer and shall conform to Table 1 with the following conditions: a) L3 ≥ 5 mm; b) D2 ≥ dn − 2emin where D1 is the mean inside diameter in the fusion zone measured in a plane parallel to the plane of the mouth at a distance of L3 + 0,5L2 from that face; D2 is the bore, which is the minimum diameter of the flow channel through the body of the fitting; L1 is the depth of penetration of the pipe or male end of a spigot fitting; in cas
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.