BS EN 50411-2-8:2009 BSI British Standards Fibre organisers and closures to be used in optical fibre communication systems — Product specifications — Part 2-8: Microduct connectors, for air blown optical fibres, Type NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide™ BRITISH STANDARD BS EN 50411-2-8:2009 National foreword This British Standard is the UK implementation of EN 50411-2-8:2009 The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnecting devices and passive components A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © BSI 2009 ISBN 978 580 62612 ICS 33.180.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2009 Amendments issued since publication Amd No Date Text affected BS EN 50411-2-8:2009 EUROPEAN STANDARD EN 50411-2-8 NORME EUROPÉENNE May 2009 EUROPÄISCHE NORM ICS 33.180.20 English version Fibre organisers and closures to be used in optical fibre communication systems Product specifications Part 2-8: Microduct connectors, for air blown optical fibres, Type Organiseurs et btiers de fibres utiliser dans les systèmes de communication par fibres optiques Spécifications de produits Partie 2-8: Connecteurs en microconduits de Type 1, destinés aux fibres optiques soufflées l'air comprimé LWL-Spleißkassetten und -Muffen für die Anwendung in LWLKommunikationssystemen Produktnormen Teil 2-8: ABF-Mikrorohrverbinder, Bauart This European Standard was approved by CENELEC on 2008-12-01 CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels © 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50411-2-8:2009 E BS EN 50411-2-8:2009 EN 50411-2-8:2009 –2– Foreword This European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic interconnect, passive and connectorised components The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50411-2-8 on 2008-12-01 The following dates were fixed: – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-12-01 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-12-01 BS EN 50411-2-8:2009 –3– EN 50411-2-8:2009 Fibre organisers and closures to be used in optical fibre communication systems Product specifications Microduct connectors, for air blown optical fibres, Type Description Performance Construction: Sealed microduct connector Tube seals: Cold applied Connector types: Straight, Straight bulkhead, Reducer, Close down, Liquid block, Liquid block with barb end, End stop and Stem Applications: Optical fibre cable networks EN 61753-1 Related documents: EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and measurement procedures (IEC 61300 series) EN 61753-1 Fibre optic interconnecting devices and passive components performance standard – Part 1: General and guidance for performance standards (IEC 61753-1) ETSI EN 300 019 series Environmental Engineering (EE) – Environmental conditions and environmental tests for telecommunications equipment m o c Construction: Examples ‘Straight through’ 标准 D f z b Nominal microduct outside diameter Diameter or across corners Length D L max max mm mm mm 23 mm 14 32 mm 15 40 mm 15 38 mm 18 42 mm 20 46 10 mm 24 50 12 mm 25 54 14 mm 29 62 33 70 w ww Microduct connector 网 享 分 L w x Connector dimensions for non-bulkhead mounting Microduct diameter 15 mm 16 mm BS EN 50411-2-8:2009 EN 50411-2-8:2009 –4– Contents Scope 1.1 Product identification 1.2 Operating environment 1.3 Reliability 1.4 Quality assurance 1.5 Safety labelling – Warning: need for an ‘over pressure device' in sealed closures Normative references Definitions and abbreviations 3.1 Definitions 3.2 Abbreviations 11 Description 11 4.1 Microduct connector housing 11 4.2 Burst pressure 15 4.3 Microduct seals 15 4.4 Materials 15 4.5 Marking 15 Variants 16 Dimensional requirements 17 6.1 Dimensions diagram 17 6.2 ‘Straight' connectors – Equal microduct 17 6.3 ‘Straight bulkhead’ connectors – Equal microduct 18 6.4 ‘ID reducer/enlarger stem’ connectors 18 6.5 ‘ID reducer/enlarger’ connectors 19 6.6 ‘OD reducer/enlarger stem’ connectors 19 6.7 ‘OD reducer/enlarger’ connectors 20 6.8 ‘ID and OD reducer/enlarger stem’ connectors 20 6.9 ‘ID and OD reducer/enlarger’ connectors 21 6.10 ‘Close Down’ connectors 21 6.11 ‘Liquid Block’ connector 22 6.12 ‘Liquid Block with barb end’ connectors 22 6.13 ‘End Stop’ connectors 22 Tests 23 7.1 Sample size 23 7.2 Test sample preparation 23 7.3 Test and measurement methods 24 7.4 Test sequence 24 7.5 Pass/fail criteria 24 Test report 24 Performance requirements 24 m o c f z b 网 享 分 w x w ww 标准 9.1 9.2 9.3 9.4 9.5 Bend radius 24 Dimensional and marking requirements 24 Sealing, optical and appearance performance criteria 24 Mechanical sealing performance requirements 26 Environmental sealing performance requirements 28 BS EN 50411-2-8:2009 –5– EN 50411-2-8:2009 Annex A (informative) Sample size and product sourcing requirements 30 Annex B (informative) Air blown fibre microduct – Mean outside diameter range 31 Annex C (normative) Test method – High pressure resistance – Safety 32 Annex D (normative) Test method – Installation 33 Annex E (normative) Test method – Insertion force 34 Bibliography 35 Figures Figure – Fibre flow impedance 11 Figure – Fibre flow impedance – Both direction step 11 Figure – Fibre flow impedance – One direction step 12 Figure – Fibre flow impedance – Acute angled step 12 Figure – ‘Typical' connector elements – Cross sectional view 13 Figure – ‘Straight’ – Equal microduct outside diameters 13 Figure – ‘Straight bulkhead’ – Equal microduct outside diameters 13 m o c Figure – ‘ID reducer/enlarger stem’– Unequal microducts with a different ID ‘OD reducer/enlarger stem’ – Unequal microducts with a different OD ‘ID and OD reducer/enlarger stem’ – Unequal microducts with a different ID and OD 13 w x Figure – ‘ID reducer/enlarger’ – Unequal microducts with a different ID ‘OD reducer/enlarger’ – Unequal microducts with a different OD ‘ID and OD reducer/enlarger’ – Unequal microducts with a different ID and OD 14 f z b w ww Figure 10 – Close down assembly access for blowing head equipment 14 Figure 11 – Liquid block transition point to stop liquid migration 14 Figure 12 – Liquid block with a barb end transition point to stop liquid migration 14 Figure 13 – End stop 14 网 享 分 Figure 14 – Microduct interconnection geometry 15 Figure 15 – Microduct connector overall dimensions 17 标准 Figure 16 – Sealing performance test sample (tank to source) 23 Figure 17 – Optical test chamber – Liquid block connectors (only) 24 Figure E.1 – Test apparatus for insertion force method 34 BS EN 50411-2-8:2009 EN 50411-2-8:2009 –6– Tables Table – Micro-duct connector – Variants EN 50411-2-8 – XXX/XXX1 - XXX/XXX2 – XXX3 – X4 16 Table – ‘Straight’ connector design – Maximum dimensions 17 Table – ‘Straight bulkhead’ connector – Maximum dimensions 18 Table – ‘ID reducer/enlarger stem’ connector – Maximum dimensions 18 Table – ‘ID reducer/enlarger’ connector – Maximum dimensions 19 Table – ‘OD reducer/enlarger stem’ connector – Maximum dimensions 19 Table – ‘OD reducer/enlarger’ connector – Maximum dimensions 20 Table – ‘ID and OD reducer/enlarger stem’ connector – Maximum dimensions 20 Table – ‘ID and OD reducer/enlarger’ connector – Maximum dimensions 21 Table 10 – ‘Close Down’ connector – Maximum dimensions 21 Table 11 – ‘Liquid Block’ connectors – Maximum dimensions 22 Table 12 – ‘Liquid Block with barb end’ connectors - Maximum dimensions 22 Table 13 – ‘End Stop’ connector 22 m o c Table 14 – Tightness, optical and appearance performance criteria 25 Table 15 – Mechanical requirements 26 w x Table 16 – Environmental sealing performance requirements 28 Table A.1 – Minimum sample size requirements 30 f z b Table B.1 – Air blown fibre microduct – Mean outside diameter range 31 标准 网 享 分 w ww BS EN 50411-2-8:2009 –7– 1.1 EN 50411-2-8:2009 Scope Product identification This specification contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements of a fully installed blown fibre ‘microduct’ connector in order for it to be categorised as an EN standard product This product specification covers the following ‘microduct connectors’ to suit a wide range of blown fibre applications, for floating or fixed: • joining the same size microduct, or different sizes of microduct; • joining same size protected microduct, to same or different size of microduct or protected microduct; • disconnection of the connector to gain access, for example, to insert blowing equipment; • a means to seal the fibre inside the connector to prevent the flow of liquids; • close off open-ended microducts m o c This product specification covers blown fibre microduct connectors for use in ‘sub-ducts or protected micro-duct cable closures’ as specified in EN 50411-2-5 for use in outside environments, and for both sealed and nonsealed closures The outside environment includes both subterranean (underground) and/or aerial applications f z b w x This document includes reducer/enlarger products It may not be possible to blow through these devices Manual feeding may be required because of the pressure gradient step w ww This product specification does not apply to microduct connectors for use in direct sunlight 1.2 网 享 分 Operating environment The tests selected, combined with the severity and duration, are representative of an outside plant environment for both subterranean and aerial environments defined by 标准 • ETSI EN 300 019 series: class 8.1: underground locations, • EN 61753-1: 1.3 all categories Reliability Whilst the anticipated service life expectancy of the product in these environments is 20 years, compliance with this specification does not guarantee the reliability of the product This should be predicted using a recognised reliability assessment programme 1.4 Quality assurance Compliance with this specification does not guarantee the manufacturing consistency of the product This should be maintained using a recognised quality assurance programme 1.5 Safety labelling – Warning: need for an ‘over pressure device' in sealed closures All air blown fibre connectors, supplied to this standard, must have a warning on the product or packaging to read as follows: Where the air blown fibre connector is installed inside a sealed airtight closure or housing, the closure must be able to be fitted with an over pressure safety system that is able to exhaust air to atmospheric pressure BS EN 50411-2-8:2009 EN 50411-2-8:2009 –8– 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 50411-2-5 Fibre organisers and closures to be used in optical fibre communication systems – Product specifications – Part 2-5: Sealed closures for air blown fibre microduct, type 1, for category S & A EN 60793-1-40:2003 Optical fibres – Part 1-40: Measurement methods and test procedures – Attenuation (IEC 60793-1-40:2001, mod.) EN 60794-1-2:2003 Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test procedures (IEC 60794-1-2:2003) EN 60794-5 series Optical fibre cables – Part 5: Sectional specification – Microduct cabling for installation by blowing (IEC 60794-5 series) EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and measurement procedures (IEC 61300 series) EN 61300-2-1 Part 2-1: Tests – Vibration (sinusoidal) (IEC 61300-2-1) EN 61300-2-4 Part 2-4: Tests – Fibre/cable retention (IEC 61300-2-4) EN 61300-2-5 Part 2-5: Tests – Torsion/twist (IEC 61300-2-5) EN 61300-2-10 Part 2-10: Tests – Crush resistance (IEC 61300-2-10) EN 61300-2-22 Part 2-22: Tests – Change of temperature (IEC 61300-2-22) EN 61300-2-23:1997 Part 2-23: Tests – Sealing for non-pressurized closures of fibre optic devices (IEC 61300-2-23:1995) EN 61300-2-26 Part 2-26: Tests – Salt mist (IEC 61300-2-26) EN 61300-2-33 Part 2-33: Tests – Assembly and disassembly of fibre optic closures (IEC 61300-2-33) EN 61300-2-34 Part 2-34: Tests – Resistance to solvents and contaminating fluids (IEC 61300-2-34) EN 61300-2-37 Part 2-37: Tests – Cable bending for fibre optic closures (IEC 61300-2-37) EN 61300-2-38:2006 Part 2-38: Tests – Sealing for pressurized fibre optic closures (IEC 61300-2-38:2006) EN 61300-3-1 Part 3-1: Examinations and measurements – Visual examination (IEC 61300-3-1) EN 61300-3-3 Part 3-3: Examinations and measurements – Active monitoring of changes in attenuation and return loss (IEC 61300-3-3) EN 61753-1 Fibre optic interconnecting devices and passive components performance standard – Part 1: General and guidance for performance standards (IEC 61753-1) f z b 网 享 分 m o c w x w ww 标准 ETSI EN 300 019 series Equipment Engineering (EE) – Environmental conditions and environmental tests for telecommunications equipment ISO 1998-1 Petroleum industry – Terminology – Part 1: Raw materials and products EN 590 Automotive fuels – Diesel – Requirements and test methods BS EN 50411-2-8:2009 EN 50411-2-8:2009 – 24 – At least one of these options should be selected for all types of liquid block connectors TEST CHAMBER Test liquid block connector Test optical monitoring equipment Microducts Microduct/cable reel Test – Optical fibre/cable Figure 17 – Optical test chamber – Liquid block connectors (only) 7.3 Test and measurement methods Tests and measurements where possible, have been selected from EN 61300 series Additional test methods are given in Annexes C, D and E No deviation from the specified test method is allowed 7.4 Test sequence There is no defined sequence in which tests – 20 must be run See Annex A 7.5 Pass/fail criteria A product will have met the requirements of this specification provided no failures occur in any test In the event of a failure occurring on a sealing performance test sample, the test shall be re run using a sample size double that of the original Test report A fully documented test report and supporting data shall be prepared and must be available for inspection as evidence that the tests described in Clause have been carried out in accordance with this specification 9.1 Performance requirements Bend radius The minimum bend radius for microducts for testing should be 12 times the diameter 9.2 Dimensional and marking requirements Dimensions and marking of the product shall be in accordance with the requirements of Clause 5, and shall be measured using the appropriate EN test method 9.3 Sealing, optical and appearance performance criteria The optical tests (Test 4) apply to the ‘liquid block’ and ‘liquid block barb end’ connectors only BS EN 50411-2-8:2009 – 25 – EN 50411-2-8:2009 Table 14 – Tightness, optical and appearance performance criteria No Test Sealing performance after test Pressure loss during test Visual appearance Change in attenuation a (point defect) Requirement No emission of water indicating a leak Difference in pressure before and after test shall be less than kPa Measurements taken at same atmospheric conditions Method: EN 61300-2-38:2006, Method A Test temperature: 23 °C ± °C Test pressure: Internal overpressure 40 kPa ± kPa (0,4 bar) Duration: 15 Pre-conditioning procedure: Sample should be conditioned to room temperature for at least h Method: EN 61300-2-38:2006, Method B Test temperature: As specified by individual test Test pressure: Internal overpressure 40 kPa ± kPa at test temperature Pressure detector: Minimum resolution 0,1 kPa Pre-conditioning procedure: Sample should be conditioned to specified temperature at test pressure for at least h No defects which would affect functionality of the connector Method: EN 61300-3-1 Examination: Product shall be checked with naked eye Excursion losses: Method: δIL ≤ 0,4 dB per incoming fibre during test (multimode only) EN 61300-3-3 EN 60793-1-40 Wavelengths: 850 nm ± 25 nm (Multimode only) 550 nm ± 25 nm (Single mode only) 625 nm ± 25 nm (Single mode only) Source stability Within ± 0,05 dB over the measuring period Detector linearity Within ± 0,05 dB over the dynamic range to be measured Measurements required: Before, during and after the test δIL ≤ 0,2 dB per incoming fibre during test (δIL ≤ 0,2 dB per incoming fibre during test (single mode only) a Details All optical losses indicated are referenced to the initial attenuation at the start of the test BS EN 50411-2-8:2009 EN 50411-2-8:2009 9.4 – 26 – Mechanical sealing performance requirements Table 15 – Mechanical requirements No Test Vibration (sinusoidal) Microduct retention Requirement Details Sealing performance (test 1) Method: EN 61300-2-1 Visual appearance (test 3) Frequency range: Hz – 500 Hz at octave/min Amplitude / acceleration force: mm or gn max Cross-over frequency: Hz Number of sweeps 10 sweeps (5-500-5) Number of axes: mutually perpendicular Test temperature: 23 °C ± °C Test pressure: Internal overpressure 100 kPa ± kPa Pre-conditioning procedure: Sample should be conditioned to room temperature for at least h Sealing performance (test 1) Method: EN 61300-2-4 Pressure loss (test 2) Test temperatures: -15 °C ± °C and +45 °C ± °C Load: value N (as follows) Visual appearance (test 3) mm diameter: 25 N mm diameter: 55 N mm to 16 mm diameter: 125 N Microduct bending Duration: h per tube Test pressure: Internal overpressure 40 kPa ± kPa Pre-conditioning procedure: Sample should be conditioned to specified temperature for at least h Tightness Method: EN 61300-2-37 Sealing performance (test 1) Test temperatures: -15 °C ± °C and +45 °C ± °C Angle: 30° at point of force application Force application: 400 mm from end of connector Number of cycles: cycles per tube Test pressure: Internal overpressure 40 kPa ± kPa at test temperature Pre-conditioning procedure: Sample should be conditioned to specified temperature for at least h Pressure loss (test 2) Visual appearance (test 3) BS EN 50411-2-8:2009 – 27 – EN 50411-2-8:2009 Table 15 – Mechanical requirements (continued) No Test Torsion/Twist Requirement Details Sealing performance (test 1) Method: EN 61300-2-5 Pressure loss (test 2) Test temperatures: -15 °C ± °C and +45 °C ± °C Torque: 90° or max Nm Force application: 100 mm from end of seal Number of cycles: cycles per tube Test pressure: Internal overpressure 40 kPa ± kPa Pre-conditioning procedure: Sample should be conditioned to specified temperature for at least h Sealing performance (test 1) Method: EN 61300-2-10 Pressure loss (test 2) Test temperatures: -15 °C ± °C and +45 °C ± °C Load: 450 N Application area: 25 cm² Locations: Centre of connector at 0° and 90° around longitudinal axis of tube connector Duration: 10 Test pressure: Internal overpressure 40 kPa ± kPa Pre-conditioning procedure: Sample should be conditioned to specified temperature for at least h Sealing performance (test 1) Method: EN 60794-1-2:2003, Method E4 Visual Appearance (test 3) Test temperatures: -15 °C ± °C and +45°C ± °C Impact tool: Steel ball with radius of striking surface: 12,5 mm Impact locations: hit at the mid-section Impact energy: 1,0 joule Number of impacts: Pre-conditioning procedure: Sample should be conditioned to specified temperature for at least h Visual appearance (test 3) Crush resistance Visual appearance (test 3) 10 11 Impact Re-entries Sealing performance (test 1) Method: EN 61300-2-33 (only to be performed when tube connector can be disconnected and reconnected again) Visual appearance (test 3) Test temperature: -15 °C ± °C and +45 °C ± °C Conditioning between each re-entry: Ageing of minimum temperature cycle as specified in test 12 Number of re-entries: BS EN 50411-2-8:2009 EN 50411-2-8:2009 9.5 – 28 – Environmental sealing performance requirements Table 16 – Environmental sealing performance requirements No 12 13 14 15 16 Test Change of temperature (cycling) Change of temperature (optical) Water immersion Salt mist Resistance to solvents and contaminating fluids Requirement Details Sealing performance (test 1) Method: EN 61300-2-22 Visual appearance (test 3) Extreme temperatures: (separate test samples are made for the optical test) -40 °C ± °C and +65 °C ± °C Dwell time: 4h Rate of change °C/min Number of cycles: 20 Sample configuration: for sealing performance Half of population is placed in a straight configuration, the other half shall make a 90° bend with minimum allowed bend radius as specified by the supplier of the microduct Test pressure: Internal overpressure regulated at 40 kPa ± kPa during test Method: EN 61300-2-22 Extreme temperatures: -40 °C ± °C and +65 °C ± °C Dwell time: 2h Rate of change °C/min Change in attenuation (test 4) Number of cycles: No water ingress Method: EN 61300-2-23:1997, Method Visual appearance (test 3) Test temperatures: +23 °C ± °C Water column height: m or an equivalent external water pressure of 50 kPa Wetting agent: None Duration: days Test pressure: kPa overpressure in tube Sealing performance (test 1) Method: EN 61300-2-26 Visual appearance (test 3) Test temperatures: +35 °C ± °C Salt solution: % NaCl (pH 6,5-7,2) Duration: days Test pressure: kPa overpressure Sealing performance (test 1) Method: EN 61300-2-34 Visual appearance (test 3) Test temperatures: +23 °C ± °C Submersion in: HCl at pH NaOH at pH 12 Kerosene (lamp oil) ISO 1998-1 1,005 Petroleum jelly Diesel fuel for cars EN 590 % NaCl (pH 6,5-7,2) White spirit and IPA Drying time at 70 °C: None Duration: days Test pressure: kPa overpressure BS EN 50411-2-8:2009 – 29 – EN 50411-2-8:2009 Table 16 – Environmental sealing performance requirements (continued) No Test Requirement 17 Resistance to stress cracking solvents Sealing performance (test 1) Method: EN 61300-2-34 Visual appearance (test 3) Test temperatures: +50 °C ± °C No visible cracking allowed Submersion in: 10 % detergent solution (Nonylphenol ethoxylate, non ionic surfactant e.g CAFLON NP9, IGEPAL) Drying time at 70 °C: None Duration: days 18 19 20 High pressure resistance (safety) Installation test Insertion force Details Test pressure: kPa overpressure Visual appearance (test 3) Method: Annex C No damage or disconnection Test temperatures: +23°C ± 2°C Duration: 30 Test pressure: 500 kPa overpressure Sealing performance (test 1) Method: Annex D Visual appearance (test 3) Test temperatures: Must allow, microduct fibre cable, or a fibre unit, to pass through the connector +23 °C ± °C (both at -10 °C and +40 °C) Duration: 1h Test pressure: 000 kPa overpressure Sealing performance (test 1) Method Annex E Inserting force in fitting the connector to the microduct 50 N max (12 mm microducts and below) 120 N max (above 14 mm microducts) BS EN 50411-2-8:2009 EN 50411-2-8:2009 – 30 – Annex A (informative) Sample size and product sourcing requirements Table A.1 – Minimum sample size requirements No NA Test Sample size Sealing performance Dimensional Sealing performance Criterion Pressure loss during test Criterion Visual appearance Criterion Change in attenuation Criterion Vibration (sinusoidal) 6 Microduct retention Microduct bending Torsion/Twist Crush resistance 10 Impact 11 Re-entries (optional) 12 Change of temperature (cycling) 13 Change of temperature (optical) 14 Water immersion 15 Salt mist 16 Resistance to solvents and fluids 17 Resistance to stress cracking solvents 18 High pressure test (safety) 19 Installation test 20 Insertion force NOTE Tests to are performance criteria tests that need to be made during mechanical or environmental tests to 19 NOTE Optical tests No 4, Change in attenuation only applies to the liquid block connector, which is in direct contact with the f bre NOTE The test methods that have been called up in EN 61300 series are written for optical connectors and may need adapting to suit depending on their relevance NOTE For practical purposes the sample set may be used for more than one test BS EN 50411-2-8:2009 – 31 – EN 50411-2-8:2009 Annex B (informative) Air blown fibre microduct – Mean outside diameter range For the “O” ring seal to be effective these tolerances on the microducts outside diameter are recommended Table B.1 – Air blown fibre microduct – Mean outside diameter range Nominal microduct outside diameter Outside diameter range max mm mm mm 2,90 3,10 4,10 3,90 4,90 5,10 5,90 6,10 6,90 7,10 7,90 8,10 10 9,90 10,10 12 11,90 12,10 14 13,90 14,10 15 14,90 15,10 16 15,90 16,10 NOTE The microduct information refers to manufacturing process data; coiling, transport, handling and installation will affect the measured dimensions and tolerances NOTE Some connectors are tolerant of larger dimensional variants, because they allow reshaping of some microducts NOTE Other nominal outside diameters can be used as long as the following dimensional tolerances, apply: • mm to 16 mm: nominal • (+0,10 to -0,10) mm: insert symbol ± BS EN 50411-2-8:2009 EN 50411-2-8:2009 – 32 – Annex C (normative) Test method – High pressure resistance – Safety See Test 18 in Table 16 C.1 Object The purpose of this test is to verify that a microduct connector is capable of withstanding the maximum internal pressure used for blowing of microduct cable or fibre unit C.2 General This test ensures safe operation at the test temperatures Using water or other suitable medium increased internal pressure is used C.3 Samples Two equal lengths of microduct approximately m long are cut from a production length The ends should be cut carefully, ensuring that they are not crushed This will prevent air leaks from around the connectors This test must be conducted in a controlled area so that there is no danger from flying fragments should the microduct fail The microduct, and microduct connector samples, should be conditioned at the test temperature for a minimum of four hours before testing C.4 Procedure One end of the microduct is connected to the pressure test equipment, and the other end, to the microduct connector Where required the second length of microduct is inserted into the connector, and a fully blocking end cap (usually metal) is fitted to the opposite open end The pressurising device is activated and the pressure increased at a rate of 500 kPa (35 bar) per minute to the specified level The sample is left pressurised for 30 (unless otherwise stated in the PS) C.5 Requirements All samples should withstand the applied pressure with no leakage during test and no visible damage after test BS EN 50411-2-8:2009 – 33 – EN 50411-2-8:2009 Annex D (normative) Test method – Installation See Test 19 in Table 16 D.1 Object The purpose of this test is to verify that a microduct connector is capable of being installed, being used to blow the fibre through the connector under field conditions and to verify its visual appearance and sealing performance D.2 General Each connector type is subject to different installation methods/needs, based on the typical applications of each type as follows: Connector type Straight mounting Curved mounting (90°) Microduct over length storage Straight Yes Yes Yes Straight bulkhead Yes No No ID reducer/enlarger stem Yes Yes No ID reducer/enlarger Yes Yes No OD reducer/enlarger stem Yes Yes No OD reducer/enlarger Yes Yes No ID and OD reducer/enlarger stem Yes Yes No ID and OD reducer/enlarger Yes Yes No Close down Yes Yes Yes Liquid block Yes No No Liquid block with a barb end Yes No No End stop Yes No No D.3 Samples Sealing performance test samples shall be provided as given in 7.2 D.4 Procedure Condition the assembled test sample for a minimum of h at an ambient temperature Simulation of the blowing process is achieved, by manually feeding the fibre unit or microduct cable through the assembled connector and microducts D.5 Requirements The microduct optical fibre unit or microduct optical fibre cable should pass through the connector without obstruction or damage Pass the requirements of Visual appearance (Test in Table 14) BS EN 50411-2-8:2009 EN 50411-2-8:2009 – 34 – Annex E (normative) Test method – Insertion force See also test 20 in Table 16 E.1 Object The purpose of this test is to verify that microduct connectors can seal after being fitted to the microduct tube, and is capable of withstanding the maximum insertion force without damage to the microduct or connector E.2 General The insertion force will vary with the size range of the microduct cables E.3 Samples Three samples of each connector type and microduct diameter within each size range will be tested E.4 Procedure One end of the microduct is to be inserted into the connector E.5 Test apparatus The following test apparatus will be adopted Test connector Test – Applied insertion force Microduct Figure E.1 – Test apparatus for insertion force method E.6 a b Requirements Maximum permitted insertion loss; Microduct cable range Insertion force - Maximum 12 mm and below 50 N 14 mm diameter and above 120 N Sealing performance after test, to EN 61300-2-38:2006, Method A, see test of Table 14 BS EN 50411-2-8:2009 – 35 – EN 50411-2-8:2009 Bibliography EN 60068-2-10 Environmental testing – Part 2-10: Tests – Test J and 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