Standard No.:	YD/T 769-2018
English Name:	Central gel-filled loose tube optical fibre cables for outdoor application for telecommunication
Chinese Name:	通信用中心管填充式室外光缆
Professional Classification:	YD    Professional Standard - Telecommunication
Issued by:	Ministry of Industry and Information Technology
Issued on:	2018-12-21
Implemented on:	2019-4-1
Status:	valid
Superseding:	YD/T 769-2010 Central tube of outdoor optical fiber cables for telecommunications
Language:	English
File Format:	PDF
Word Count:	15500 words
Price(USD):	460.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the product classification and designation, requirements, test methods, inspection rules, packaging, transportation and storage of central gel-filled loose tube optical fibre cables for outdoor application for telecommunication (hereinafter referred to as “optical fibre cables”). This standard is applicable to duct, directly buried, tunnel (channel), lashed aerial and other normally laid central gel-filled loose tube optical fibre cables for outdoor application for telecommunication. This standard is not applicable to micro optical fibre cables and gel-free optical fibre cables laid by air blowing. 2 Normative references The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 2951.11-2008 Common test methods for insulating and sheathing materials of electric cables and optical cables—Part 11: Methods for general application—Measurement of thickness and overall dimensions—Tests for determining the mechanical properties (IEC 60811-1-1: 2001, IDT) GB/T 2952 (All parts) Protective coverings for electric cables GB/T 3280 Cold rolled stainless steel plate, sheet and strip GB/T 4240 Stainless steel wires GB/T 6995.2-2008 Markings for electric wires and cables—Part 2: Standard colours GB/T 7424.2-2008 Optical fibre cable generic specification—Part 2: Basic optical cable test procedures (IEC 60794-1-2: 2003, MOD) GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 9771 (All parts) Single-mode optical fibres for telecommunication GB/T 15065 Black polyethylene compounds for wire and cable   GB/T 15972.20 Specifications for optical fibre test methods—Part 20: Measurement methods and test procedures for dimensions—Fiber geometry (GB/T 15972.202008, IEC 60793-1-20: 2001, MOD) GB/T 15972.21 Specifications for optical fibre test methods—Part 21: Measurement methods and test procedures for dimensions—Coating geometry (GB/T 15972.212008, IEC 60793-1-21: 2001, MOD) GB/T 15972.22 Specifications for optical fibre test methods—Part 22: Measurement methods and test procedures for dimensions—Length measurement (GB/T 15972.22-2008, IEC 60793-1-22: 2001, MOD) GB/T 15972.40 Specifications for optical fibre test methods—Part 40: Measurement methods and test procedures for transmission and optical characteristics—Attenuation (GB/T 15972.40-2008, IEC 60793-1-40: 2001, MOD) GB/T 15972.42 Specifications for optical fibre test methods—Part 42: Measurement methods and test procedures for transmission and optical characteristics—Chromatic dispersion (GB/T 15972.42-2008, IEC 60793-1-42: 2001, MOD) GB/T 15972.44 Specifications for optical fibre test methods—Part 44: Measurement methods and test procedures for transmission and optical characteristics—Cut-off wavelength (GB/T 15972.44-2008, IEC 60793-1-44: 2001, MOD) GB/T 15972.45 Specifications for optical fibre test methods—Part 45: Measurement methods and test procedures for transmission and optical characteristics—Mode field diameter (GB/T 15972.45-2008, IEC 60793-1-45: 2001, MOD) GB/T 15972.48-2016 Specifications for optical fibre test methods—Part 48: Measurement methods and test procedures for transmission and optical characteristics—Polarization mode dispersion (IEC 60793-1-48: 2007, NEQ) GB/T 17650.2-1998 Test on gases evolved during combustion of materials from cables—Part 2: Determination of degree of acidity of gases by measuring pH and conductivity (IEC 60754-1: 1994, IDT) GB/T 17651-1998 (All parts) Measurement of smoke density of cables burning under defined conditions (idt IEC 61034: 1997) GB/T 18380.12-2008 Tests on electric and optical fibre cables under fire conditions—Part 12: Test for vertical flame propagation for a single insulated wire or cable—Procedure for 1kW pre-mixed flame (IEC 60332-1-2: 2004, IDT) GB/T 24202 Carbon steel wire for optical fiber cable tension members GB/T 26125-2011 Electrical and electronic products—Determination of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers) (IEC 62321: 2008, IDT) GB/T 26572 Requirements of concentration limits for certain restricted substances in electrical and electronic products YD/T 629 (All parts) Monitoring method of attenuation changes in optical fiber transmission YD/T 723.2-2007 Laminated metal plastic strip for communication cable and optical fibre cable—Part 2: Laminated aluminium plastic strip YD/T 723.3-2007 Laminated metal plastic strip for communication cable and optical fibre cable—Part 3: Laminated steel plastic strip YD/T 837.1~837.5-1996 Test method of copper-core, polyolefin insulated, composite aluminum-plastic sheathed cables for urban local communications YD/T 839.2-2014 Filling compounds and flooding compounds for telecommunication cable and optical fibre cable—Part 2: Filling compounds for optical fibre YD/T 839.3-2014 Filling compounds and flooding compounds for telecommunication cable and optical fibre cable—Part 3: Filling compounds for cable YD/T 908-2011 The naming rules for type of optical fibre cables YD/T 1020 (All parts) Characteristics of termite resistant jacketing materials for electrical cable and optical cable YD/T 1065.2-2015 Test methods for polarization mode dispersion of single-mode optical fibres—Part 2: Statistical calculation methods of link polarization mode dispersion (PMDQ) YD/T 1113 Low-smoke halogen-free compounds for telecommunication cable and optical fibre cable YD/T 1115 (All parts) Waterblocking materials for telecommunication cable and optical fiber cable—Part1: Waterblocking tape YD/T 118.1 Secondary coating materials used for optical fiber—Part 1: Polybutylene terephthalate YD/T 1118.2 Secondary coating materials used for optical fiber—Part 2: Modified propyleneresin YD/T 1118.3 Secondary coating materials used for optical fibre—Part3: Modified polycarbonate YD/T 1181.1 Characteristics of non-metal reinforcement used for optical cable—Part 1: Glass fiber reinforced plastic rods YD/T 1181.2 Characteristics of non metal reinforcement for optical fiber cables—Part 2: Aramid yarne YD/T 1181.3 Characteristics of non-metal reinforcement for optical fiber cables—Part 3: Aramid fiber reinforced plastic rods YD/T 1181.4 Characteristics of non-metal reinforcement for optical fiber cables—Part 4: Glass fiber yarns JB/T 8137-1999 (All parts) Delivery drums for wires and cables—Part 1: General specifies 3 Product classification 3.1 General The optical fibre cable specified in this standard is the central gel-filled loose tube optical fibre cables for outdoor application, and the central tube shall be continuously filled with fibre paste, and the water blocking structure characteristics of optical fibre cable are gel filled. The optical fibre cables have their types, specifications and compilation models classified in accordance with YD/T 908-2011. Where, the following provisions are added to the codes related to sheaths: W——Steel-plastic bonded sheath with parallel reinforcing member; P——Plastic sheath with parallel reinforcing member. Note: P means parallel. 3.2 Types 3.2.1 Basic structure type and name of optical fibre cable The basic structure type and name of optical fibre cable are as follows: ● GYXTW—Central gel-filled tube steel-polyethylene bonded sheathed optical fibre cable for outdoor application for telecommunication with metal reinforcing member and parallel steel wire;

Foreword i 1 Scope 2 Normative references 3 Product classification 3.1 General 3.2 Types 3.3 Specifications 3.4 Product models 3.5 Product marking 4 Requirements 4.1 Structure 4.2 Length 4.3 Marking 4.4 Performance requirements 5 Test methods 5.1 General 5.2 Inspection of optical fibre cable structure 5.3 Inspection of optical fibre cable markings 5.4 Inspection of optical fibre cable length 5.5 Mechanical properties test on optical fibre cables 5.6 Environmental properties test on optical fibre cables 6 Inspection rules 6.1 General provisions 6.2 Terms of inspection 6.3 End-of-manufacturing inspection 6.4 Type inspection 7 Packaging, transportation and storage 7.1 Packaging 7.2 Transportation and storage 8 Instructions for use Annex A (informative) Applicable laying modes and special conditions for main types Annex B (informative) optical fibre cable cross sections of several typical central tube structures Annex C (normative) Characteristic requirements of single-mode optical fibre in optical fibre cable