1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationFibre organisers and closures to be used in optical fibre communications systems Product specificationsPart 2-9: Non-sealed closures for air blown fibre microduct cable, for cate
2、gory S Environmental conditions and environmental tests for telecommunications equipment Construction: (I) Closures Duct and cable port entries and dimensions (all direct burial, jointing pit or aerial mounted) Closure Min. number of ports Maximum sizes of protected microduct cables or ducts (mm) Ma
3、ximum physical dimensions (mm) Length L Width W Depth D (T) Closures Inline retrofit ports Range of drop ports (I) 2 50 N/A 410 120 120 (Y) Closures (T) 3 50 50 390 240 100 (H) Closures (Y) 3 50 50 380 210 100 (H) 4 60 60 830 340 160 (U) Closures (U) 12 50 50 600 470 310 BS EN 50411-2-9:2010EN 50411
4、-2-9:2010 4 Contents 1 Scope . 7 1.1 Product definition . 7 1.2 Operating environment . 7 1.3 Test severity 7 1.4 Reliability . 7 1.5 Quality assurance 7 1.6 Allowed fibre and cable types . 7 1.7 Allowed microduct connector types . 7 1.8 Microduct storage constraints . 8 1.9 Essential differences be
5、tween sealed and non-sealed ABF closures 8 1.10 Closures configurations defined diagrammatically By shape and application . 8 2 Normative references 9 3 Terms, definitions and abbreviations . 10 3.1 Definitions 10 3.2 Abbreviations . 12 4 Description 12 4.1 Microduct closure . 12 4.2 Closure housing
6、 functions 13 4.3 Burst pressure 13 4.4 Closure housing configurations 13 4.5 Entry retention device or seal . 15 4.6 Common base configurations . 15 4.7 Microduct management system 15 4.8 Materials 16 4.9 Colour and marking 16 4.10 Microduct connectors applications and capacity . 16 5 Variants 17 6
7、 Dimensions 19 6.1 Dimensions of (I) inline closures . 19 6.2 Dimensions of (T) inline closures 20 6.3 Dimensions of (Y) inline closures . 20 6.4 Dimensions of (H) inline closures . 21 6.5 Dimensions of (U) inline closures . 22 7 Tests 22 7.1 Sample size . 22 7.2 Test sequence 22 7.3 Pass/fail crite
8、ria . 23 8 Test report . 23 9 Performance requirements 24 9.1 Dimensional and marking requirements 24 9.2 Appearance performance criteria 24 9.3 Mechanical performance requirements . 25 9.4 Environmental performance requirements 27 BS EN 50411-2-9:2010 5 EN 50411-2-9:2010 Annex A (informative) Sampl
9、e size and product sourcing requirements 29 Annex B (informative) Closure minimum internal diameters, containing microduct connectors . 30 Annex C (informative) Typical buried subterranean blown fibre microduct cable outside diameters 34 Annex D (informative) Microduct definitions and sketches . 35
10、Annex E (informative) Microduct minimum bend radius 38 Annex F (informative) Typical (U) closure configurations 39 Figures Figure 1 Closures configurations . 8 Figure 2 Schematic Minimum microduct and connector space profile (see Annex B) 13 Figure 3 (I) Single port ended 13 Figure 4 (T) Single entr
11、y port ends with a single port at 90 . 14 Figure 5 (Y) 14 Figure 6 (H) Inline double entry ports at each ends 14 Figure 7 (U) Multiple end/side entry ported closure 15 Figure 8 Diagram showing (I) inline Closures dimensions. 19 Figure 9 (T) Diagram showing Closures dimensions . 20 Figure 10 (Y) Diag
12、ram showing Closures dimensions . 20 Figure 11 (H) Diagram showing Closures dimensions 21 Figure 12 (U) Diagram showing Closures dimensions 22 Figure 13 Track joint configuration sample 23 Figure 14 Spur joint configuration sample . 23 Figure 15 Distribution joint configuration sample . 23 Figure B.
13、1 Schematic Minimum microduct and connector space profile 30 Figure D.1 Straight microduct connectors . 35 Figure D.2 Straight bulkhead microduct connectors 35 Figure D.3 ID/OD/ID and OD reducer/enlarger stem microduct connectors 35 Figure D.4 ID/OD/ID and OD reducer/enlarger microduct connectors 36
14、 Figure D.5 Close down microduct connectors 36 Figure D.6 Liquid block microduct connectors . 36 Figure D.7 Liquid block with a barb end 36 Figure D.8 End stop microduct connectors 37 Figure F.1 Universal UA Inline closure . 39 Figure F.2 Universal UB Inline closure . 39 Figure F.3 Universal UC Inli
15、ne closure . 39 Figure F.4 Universal UD Inline closure . 40 Tables Table 1 Variants for sealed closures for ABF protected microduct, for category S - EN 61753-1: Category S: subterranean environment; Category A: aerial environment. 1.3 Test severity The test severities are based on IP40 (see EN 6052
16、9). The test criteria for all mechanical and environmental tests cover visual appearance, and protected microduct retention of the closure. It is generally accepted practice that liquids will enter the closure through its body or connected ducts. 1.4 Reliability Whilst the anticipated service life e
17、xpectancy of the product in this environment is a minimum of 20 years, compliance with this specification does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme. 1.5 Quality assurance Compliance with this specification does not
18、 guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. 1.6 Allowed fibre and cable types This closure standard covers all IEC/EN standard optical fibre microducts, and protected microducts with their various fibre capacities
19、, types and designs. This includes optical fibre cable standard EN 60794-5. This product specification has only considered protected microduct cables containing microducts of same outside diameters. There are other hybrid protected microduct cables with microducts of differing ODs; it may be possibl
20、e to use these hybrids, however the user must verify suitability in each case. 1.7 Allowed microduct connector types This closure standard covers all EN standard microduct connectors, including: straight, reducer/enlarger stem, reducer/enlarger, close down, liquid block, liquid block with barb end,
21、and end stop connectors. This includes EN 50411-2-8. BS EN 50411-2-9:2010EN 50411-2-9:2010 8 1.8 Microduct storage constraints Microduct excess storage is not required in all air blown fibre closures. Some closure types do not have sufficient internal space to provide storage. The need for microduct
22、 storage is provided inside the closure when opened, typically to ensure that there is enough microduct to fulfil the following functions: remove the coiled microduct attached to the closedown connectors, to a remote location, close to blowing equipment, in the process uncoiling the microducts to ai
23、d blowing; provide additional microduct if repeated cut backs for connectors are planned or likely to be fitted throughout the closure life. The minimum microduct storage bend radius is based on the outside diameter and material selection, typically based on 12 times the outside diameter (below 8 mm
24、) and 20 times above. During fibre blowing the bend radius is typically 20 times the microduct diameter. 1.9 Essential differences between sealed and non-sealed ABF closures The non-sealed ABF closures covered in this product specification typically differ from sealed ABF closures in EN 50411-2-5, i
25、n the following ways: mandatory to use ABF connectors in non-sealed closures meeting EN 50411-2-8 in order to protect the fibre within the microducts; typically rotational, compression, thermoformed or injection moulded; generally accepted that liquids will enter the closure through its body or conn
26、ected ducts. 1.10 Closures configurations defined diagrammatically By shape and application (I) - Track closure (T) Spur closure (Y) Spur closure (H) Inline spur/Distribution closure (U) Universal distribution closure Figure 1 Closures configurations The above diagrams show one protected microduct p
27、er port, however, the use of port adaptors, sometimes known as manifolds, can increase this number at any output port. BS EN 50411-2-9:2010 9 EN 50411-2-9:2010 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only
28、 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 micr
29、oduct, type 1, for category S 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 50411-2-9:2010EN 50411-2-9:2010 10 3 Terms,
30、definitions and abbreviations 3.1 Definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 duct semi-rigid underground pipe, typically manufactured from a polymeric material, and typically greater than 65 mm outside diameter 3.1.2 sub-duct underground semi-flex
31、ible pipes, which may fit inside a duct, typically manufactured from a polymeric material, and typically less than 50 mm outside diameter 3.1.3 microduct small, flexible, lightweight tubes with an outer diameter typically less than or equal to 16 mm 3.1.4 protected microduct one or more microducts s
32、urrounded by a protective sheath and/or protected by a duct/sub-duct 3.1.5 microduct optical fibre cable optical fibre cables suitable for installation by blowing into a microduct 3.1.6 microduct fibre units fibre unit that is suitable for installation by blowing into a microduct. It differs from mi
33、croduct optical fibre cables in that it provides less protection to the fibres that it contains 3.1.7 air blown fibre non-sealed intercept microduct closure ABF non-sealed intercept microduct closures provide a physical housing for microduct management; connection, fixing, anchoring, liquid and/or g
34、as blocking, storage and routing up to the input and output protected microduct of the air blown fibre cable closure system 3.1.8 blowing point closure closure used as a position for blowing fibre at multiple points in series (cascade blowing). Typically the closure contains close down microduct con
35、nectors, for fibre unit or cable access to the blowing head equipment 3.1.9 straight microduct connector microduct connectors are used to connect two microducts together. This connector has a means of microduct attachment and sealing on both sides and is typically unsupported inside the closure 3.1.
36、10 straight bulkhead microduct connector microduct connectors are used to connect two microducts together. This connector has a means of microduct attachment and sealing on both sides and is typically supported on a bulkhead attached by a suitable fixing system (i.e. nut or clip) 3.1.11 different ID
37、 reducers/enlarger stem microduct connector stem connector which connects two microducts with the same OD but different ID, with a smooth internal transition to prevent fibre hang ups. Typically they have microduct attachment and sealing at one end of the connector, and a stem on the other end to fa
38、cilitate attachment to a straight connector BS EN 50411-2-9:2010 11 EN 50411-2-9:2010 3.1.12 different ID reducers/enlarger microduct connector connectors which connect two microducts with the same OD but different ID, including a smooth internal transition to prevent fibre hang ups. Typically they
39、are used to connect a heavy walled to a thinner wall MD 3.1.13 different OD reducers/enlarger stem microduct connector stem which connects two microducts with the same ID but different OD. Typically they have microduct attachment and sealing at one end of the connector, and a stem on the other end t
40、o facilitate attachment to a straight connector 3.1.14 different OD reducers/enlarger microduct connector connector which connects two microducts with the same ID but different OD 3.1.15 different ID and OD reducers/enlarger stem microduct connector stem which connects two microducts with a differen
41、t OD and different ID, including a smooth internal transition to prevent fibre hang ups. Typically they have microduct attachment and sealing at one end of the connector, and a stem on the other end to facilitate attachment to a straight connector 3.1.16 different ID and OD reducers/enlarger microdu
42、ct connector connector which connects two microducts with different ODs and different IDs, including a smooth internal transition to prevent fibre hang ups 3.1.17 close down microduct connector microduct connectors that are used for fibre access for blowing head equipment for cascade blowing, allowi
43、ng a microduct to be opened and resealed after blowing, without detriment to the fibre in situ 3.1.18 liquid block microduct connector microduct connectors that are used at a transition point to stop liquids from flowing between the connected microducts to avoid liquid and contaminant ingress and li
44、quid damage to other equipment 3.1.19 liquid block with a barb end similar to a liquid block connector, at the barb end. The barb end is designed to interface with the non-microduct (transport tubing), which protects the fibre at a “fibre management system” closure 3.1.20 end stop microduct connecto
45、r microduct connectors that are used for sealing open ended microduct, avoiding air leakage, water or foreign material ingress 3.1.21 connector insertion force force required to insert the microduct into the connector without damage 3.1.22 fibre management system system to control fibre routing from
46、 the incoming to the outgoing fibres, containing one or more splice cassettes and additional functional elements 3.1.23 microduct management system system to control microduct routing inside a closure or housing, from the incoming to the outgoing microduct, all jointed together with microduct connec
47、tors of various functional types BS EN 50411-2-9:2010EN 50411-2-9:2010 12 3.1.24 burst pressure point at which the closure fails to contain pressure 3.1.25 cut backs process to remove a short length of microduct in order to prepare the ends, prior to fitting a new connector, ensuring better sealing
48、and attachment faces 3.1.26 retrofit closure that allows fitting or access after the duct or protected microduct has been installed 3.1.27 entry ports input or output for protected microduct 3.2 Abbreviations For the purposes of this document, the following abbreviations apply. PS Product Specificat
49、ion MD Microduct PM Protected Microduct ABF Air Blown Fibre ID Inside Diameter (microducts) OD Outside Diameter (microducts) AC Across Corners MMS Microduct Management System FMS Fibre Management Systems 4 Description 4.1 Microduct closure An ABF microduct closure comprises a closure housing that is attached to the ends of an underground installed duct or sub duct, or an air blown fibre protected microduct. Microd
