Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
YD/T 3350 consists of the following parts under the general title Gel-free optical fiber cables for outdoor application for telecommunication:
——Part 1: Stranded loose tube cables;
——Part 2: Central tube cables;
……
This is Part 1 of YD/T 3350.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part is drafted by reference to IEC 60794-3: 2014 Optical fiber cables - Part 3: Outdoor cables - Sectional application (Edition 4), IEC 60794-3-11: 2010 Optical fiber cables - Part 3-11: Outdoor cables - Product specification for duct, directly buried and lashed aerial single-mode optical fiber telecommunication cables (Edition 2.0), Telcordia GR-20-CORE: 2013 Generic requirements for optical fiber and optical fiber cable (Edition 4.0) and ANSI/ICEA S-87-640: 2011 Standard for optical fiber outside plant communications cable (Edition 5).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This part was proposed by and is under the jurisdiction of China Communications Standards Association.
Gel-free optical fiber cables for outdoor application for telecommunication - Part 1: Stranded loose tube cables
1 Scope
This part specifies the product classification, requirements, test methods, inspection rules, marking, instructions for use, packaging, transportation and storage requirements for stranded loose tube cables of gel-free optical fiber cables for outdoor application for telecommunication (hereinafter referred to as optical fiber cables).
This part is applicable to duct, directly buried, tunnel (channel), lashed aerial and other normally laid gel-free optical fiber cables for telecommunication. This part is not applicable to fully filled optical fiber cables, semi-dry optical fiber cables and micro optical fiber cables laid by air blowing.
2 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.
GB/T 2951.11-2008 Common test methods for insulating and sheathing materials of electric 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 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 15972.20-2008, 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 15972.21-2008, IEC 60793-1-21: 2001, MOD)
GB/T 15972.22-2008 Specifications for optical fibre test methods - Part 22: Measurement methods and test procedures for dimensions - Length measurement (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 15972.44-2017, IEC 60793-1-44: 2011, 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 Specifications for optical fibre test methods - Part 48: Measurement methods and test procedures for transmission and optical characteristics - Polarization mode dispersion (GB/T 15972.48-2016, 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 (idt IEC 60754-2: 1991 Amendment No.1: 1997)
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 18380.35-2008 Tests on electric and optical fibre cables under fire conditions - Part 35: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C (IEC 60332-3-24: 2000, IDT)
GB/T 26125-2011 Electrical and electronic products - Determination of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers)
GB/T 26572-2011 Requirements of concentration limits for certain restricted substances in electrical and electronic products
YD/T 629 (All parts) Monitoring methods for optical fibre transmission attenuation change
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 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
YD/T 1118 (All parts) Secondary coating materials used for optical fiber
YD/T 1181 (All parts) Characteristics of non-metal reinforcement used for optical cable
YD/T 3022.3 Mechanical test methods for telecommunication optical fibre cables - Part 3: Rip cord function
JB/T 8137 (All parts) Delivery drums for wires and cables
3 Product classification
3.1 General
The optical fiber cables have their types, specifications and compilation models classified in accordance with YD/T 908-2011. Wherein, the code related to the characteristics of water blocking structure:
——(unsigned): gel-free.
The code added in relation to armor layer in Table 1 of YD/T 908-2011:
——8: non-metal rod armor.
3.2 Types
3.2.1 Common structural types and structural characteristics of optical fiber cables are as follows:
——GYFY: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath;
——GYY: metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath;
——GYY04: metal reinforcing member, gel-free stranded loose tube cable, polyethylene jacket covered with nylon jacket;
——GYF6Y: non-metal reinforcing member, gel-free stranded loose tube cable type, non-metal wire auxiliary reinforcement, polyethylene jacket;
——GYFA: non-metal reinforcing member, gel-free stranded loose tube cable, aluminum-polyethylene bonded sheath;
——GYA: metal reinforcing member, gel-free stranded loose tube cable, aluminum-polyethylene bonded sheath;
——GYFS: non-metal reinforcing member, gel-free stranded loose tube cable, steel-polyethylene bonded sheath;
——GYS: metal reinforcing member, gel-free stranded loose tube cable, steel-polyethylene bonded sheath;
——GYY53: metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, longitudinal corrugated steel tape armor, polyethylene jacket;
——GYFY53: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, longitudinal corrugated steel tape armor, polyethylene jacket;
——GYFY63: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, non-metal wire armor and polyethylene jacket;
——GYFY73: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, non-metal tape armor and polyethylene jacket;
——GYFY83: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, non-metal rod armor and polyethylene jacket.
3.2.2 Applicable occasions of main types
See Annex A for applicable laying modes and special conditions for main types and derived types of optical fiber cables.
3.3 Specifications
3.3.1 The optical fibers in optical fiber cables shall be of Class B1.1 (dispersion unshifted single-mode optical fiber), Class B1.2 (cut-off wavelength shifted single-mode optical fiber), Class B1.3 (extended wavelength band dispersion unshifted single-mode optical fiber), Class B4 (non-zero dispersion shifted single-mode optical fiber), Class B5 (single-mode optical fiber with non-zero dispersion for wideband optical transport) and Class B6 (bending insensitive single-mode optical fiber for the access network) meeting those specified in GB/T 9771, or other classes of single-mode optical fiber as requested by users.
3.3.2 The number of optical fibers in an optical fiber cable should be 2~288, which may also be required by users.
3.4 Product model and designation
3.4.1 Model
The optical fiber cable model consists of the type code and the specification code of optical fiber cable.
3.4.2 Designation
Upon processing and ordering, the optical fiber cable shall be marked with a designation, which consists of the model of the optical fiber cable and the number of this part.
Example: The gel-free stranded loose tube optical fiber cable for outdoor telecommunication with non-metal reinforcing member and polyethylene sheath, including 48 Class B1.3 single-mode optical fibers, is designated as GYFY 48B1.3 YD/T 3350.1-2018.
4 Requirements
4.1 Structure
4.1.1 General
4.1.1.1 The optical fiber cable shall be composed of two parts: stranded loose tube cable core and sheath, wherein, the sheath includes sheath and oversheath (if any). Schematic diagrams for several gel-free stranded loose tube optical fiber cables are given in Annex B, and other structures meeting the requirements of this part may also be adopted.
4.1.1.2 The optical fiber cable shall be a full-section water blocking structure, that is, water cannot seep longitudinally in the cable core and sheath, except the steel wire armored part outside the sheath and the non-metal rod, tape and wire armored part.
4.1.1.3 The optical fiber cables of the same batch, type and specification shall have the same structural arrangement and the same identification chromatogram.
4.1.2 Cable core
4.1.2.1 General
Generally, the cable core includes central reinforcing member (including possible cushion), loose tube fiber stranded layer (including possible filling rope), possible binding yarn, wrapping tape and non-metal auxiliary reinforcing member, etc.
4.1.2.2 Optical fiber
4.1.2.2.1 The optical fiber in optical fiber cable shall be the same type of coated optical fiber, and the number of cores shall meet the requirements of optical fiber cable specifications. For the same batch of optical fiber cables, optical fibers manufactured with the same design, materials and processes should be adopted.
4.1.2.2.2 The surface of optical fiber coating layer shall be provided with full-color code, and its color shall conform to GB/T 6995.2-2008, and shall not fade or migrate.
4.1.2.2.3 The property of optical fiber used for cabling shall comply with relevant requirements of GB/T 9771.
4.1.2.3 Loose tube and its water blocking material
4.1.2.3.1 The loose tube may be made of polybutylene terephthalate (PBT) plastic, modified polypropylene (PP) plastic, modified polycarbonate (PC) plastic or other suitable plastic. PBT shall meet the requirements of YD/T 1118.1, PP shall meet the requirements of YD/T 1118.2 and PC shall meet the requirements of YD/T 1118.3.
4.1.2.3.2 The number of optical fibers in each loose tube should not be greater than 12, or more cores may be adopted as required by users.
4.1.2.3.3 The nominal outer diameter of the loose tube should be 1.7~3.2mm, and its tolerance shall not be less than ±0.1mm; the thickness shall increase with the increase of outer diameter, its nominal value should be 0.25~0.50mm, and its tolerance shall not be less than ±0.05mm. In addition, the nominal dimension of loose tube may change with the number of optical fiber cores in the tube, but the nominal dimension of loose tube of the same number of cores in the same optical fiber cable should be the same. Other nominal dimensions required by users are allowed.
4.1.2.3.4 The color of each coated optical fiber in the loose tube shall be identifiable, and the colors of 12 or less optical fibers shall be selected from various colors specified in Table 1. Color rings should be added if there are more than 12 cores, or binding yarn may be used to form bundles. The colors of binding yarns shall be selected from Table 1 for identification. Without affecting the recognition, it is allowed to use natural color instead of white color in Table 1.
Foreword i
1 Scope
2 Normative references
3 Product classification
3.1 General
3.2 Types
3.3 Specifications
3.4 Product model and designation
4 Requirements
4.1 Structure
4.2 Delivery length
4.3 Property requirements
5 Test methods
5.1 General
5.2 Inspection of optical fiber cable structure
5.3 Inspection of optical fiber cable markings
5.4 Optical fiber cable length inspection
5.5 Mechanical properties of optical fiber cable
5.6 Environmental properties test on optical fiber cables
6 Inspection rules
6.1 General
6.2 Term definition
6.3 End-of-manufacturing inspection
6.4 Type inspection
7 Marking and instructions for use
7.1 Marking
7.2 Instructions for use
8 Packaging, transportation and storage
8.1 Packaging
8.2 Transportation and storage
Annex A (informative) Applicable laying modes and special conditions for main types
Annex B (informative) Schematic diagram for typical gel-free stranded loose tube optical fiber cables
Annex C (informative) Representation method of loose tube color bar
Annex D (normative) Characteristic requirements of single-mode optical fiber in optical fiber cable
Annex E (informative) Temperature characteristics of optical fiber cable after aging
Annex F (informative) Material compatibility test of optical fiber cable
Annex G (informative) Internal freezing test of optical fiber cable
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
YD/T 3350 consists of the following parts under the general title Gel-free optical fiber cables for outdoor application for telecommunication:
——Part 1: Stranded loose tube cables;
——Part 2: Central tube cables;
……
This is Part 1 of YD/T 3350.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part is drafted by reference to IEC 60794-3: 2014 Optical fiber cables - Part 3: Outdoor cables - Sectional application (Edition 4), IEC 60794-3-11: 2010 Optical fiber cables - Part 3-11: Outdoor cables - Product specification for duct, directly buried and lashed aerial single-mode optical fiber telecommunication cables (Edition 2.0), Telcordia GR-20-CORE: 2013 Generic requirements for optical fiber and optical fiber cable (Edition 4.0) and ANSI/ICEA S-87-640: 2011 Standard for optical fiber outside plant communications cable (Edition 5).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This part was proposed by and is under the jurisdiction of China Communications Standards Association.
Gel-free optical fiber cables for outdoor application for telecommunication - Part 1: Stranded loose tube cables
1 Scope
This part specifies the product classification, requirements, test methods, inspection rules, marking, instructions for use, packaging, transportation and storage requirements for stranded loose tube cables of gel-free optical fiber cables for outdoor application for telecommunication (hereinafter referred to as optical fiber cables).
This part is applicable to duct, directly buried, tunnel (channel), lashed aerial and other normally laid gel-free optical fiber cables for telecommunication. This part is not applicable to fully filled optical fiber cables, semi-dry optical fiber cables and micro optical fiber cables laid by air blowing.
2 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.
GB/T 2951.11-2008 Common test methods for insulating and sheathing materials of electric 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 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 15972.20-2008, 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 15972.21-2008, IEC 60793-1-21: 2001, MOD)
GB/T 15972.22-2008 Specifications for optical fibre test methods - Part 22: Measurement methods and test procedures for dimensions - Length measurement (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 15972.44-2017, IEC 60793-1-44: 2011, 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 Specifications for optical fibre test methods - Part 48: Measurement methods and test procedures for transmission and optical characteristics - Polarization mode dispersion (GB/T 15972.48-2016, 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 (idt IEC 60754-2: 1991 Amendment No.1: 1997)
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 18380.35-2008 Tests on electric and optical fibre cables under fire conditions - Part 35: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C (IEC 60332-3-24: 2000, IDT)
GB/T 26125-2011 Electrical and electronic products - Determination of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers)
GB/T 26572-2011 Requirements of concentration limits for certain restricted substances in electrical and electronic products
YD/T 629 (All parts) Monitoring methods for optical fibre transmission attenuation change
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 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
YD/T 1118 (All parts) Secondary coating materials used for optical fiber
YD/T 1181 (All parts) Characteristics of non-metal reinforcement used for optical cable
YD/T 3022.3 Mechanical test methods for telecommunication optical fibre cables - Part 3: Rip cord function
JB/T 8137 (All parts) Delivery drums for wires and cables
3 Product classification
3.1 General
The optical fiber cables have their types, specifications and compilation models classified in accordance with YD/T 908-2011. Wherein, the code related to the characteristics of water blocking structure:
——(unsigned): gel-free.
The code added in relation to armor layer in Table 1 of YD/T 908-2011:
——8: non-metal rod armor.
3.2 Types
3.2.1 Common structural types and structural characteristics of optical fiber cables are as follows:
——GYFY: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath;
——GYY: metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath;
——GYY04: metal reinforcing member, gel-free stranded loose tube cable, polyethylene jacket covered with nylon jacket;
——GYF6Y: non-metal reinforcing member, gel-free stranded loose tube cable type, non-metal wire auxiliary reinforcement, polyethylene jacket;
——GYFA: non-metal reinforcing member, gel-free stranded loose tube cable, aluminum-polyethylene bonded sheath;
——GYA: metal reinforcing member, gel-free stranded loose tube cable, aluminum-polyethylene bonded sheath;
——GYFS: non-metal reinforcing member, gel-free stranded loose tube cable, steel-polyethylene bonded sheath;
——GYS: metal reinforcing member, gel-free stranded loose tube cable, steel-polyethylene bonded sheath;
——GYY53: metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, longitudinal corrugated steel tape armor, polyethylene jacket;
——GYFY53: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, longitudinal corrugated steel tape armor, polyethylene jacket;
——GYFY63: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, non-metal wire armor and polyethylene jacket;
——GYFY73: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, non-metal tape armor and polyethylene jacket;
——GYFY83: non-metal reinforcing member, gel-free stranded loose tube cable, polyethylene sheath, non-metal rod armor and polyethylene jacket.
3.2.2 Applicable occasions of main types
See Annex A for applicable laying modes and special conditions for main types and derived types of optical fiber cables.
3.3 Specifications
3.3.1 The optical fibers in optical fiber cables shall be of Class B1.1 (dispersion unshifted single-mode optical fiber), Class B1.2 (cut-off wavelength shifted single-mode optical fiber), Class B1.3 (extended wavelength band dispersion unshifted single-mode optical fiber), Class B4 (non-zero dispersion shifted single-mode optical fiber), Class B5 (single-mode optical fiber with non-zero dispersion for wideband optical transport) and Class B6 (bending insensitive single-mode optical fiber for the access network) meeting those specified in GB/T 9771, or other classes of single-mode optical fiber as requested by users.
3.3.2 The number of optical fibers in an optical fiber cable should be 2~288, which may also be required by users.
3.4 Product model and designation
3.4.1 Model
The optical fiber cable model consists of the type code and the specification code of optical fiber cable.
3.4.2 Designation
Upon processing and ordering, the optical fiber cable shall be marked with a designation, which consists of the model of the optical fiber cable and the number of this part.
Example: The gel-free stranded loose tube optical fiber cable for outdoor telecommunication with non-metal reinforcing member and polyethylene sheath, including 48 Class B1.3 single-mode optical fibers, is designated as GYFY 48B1.3 YD/T 3350.1-2018.
4 Requirements
4.1 Structure
4.1.1 General
4.1.1.1 The optical fiber cable shall be composed of two parts: stranded loose tube cable core and sheath, wherein, the sheath includes sheath and oversheath (if any). Schematic diagrams for several gel-free stranded loose tube optical fiber cables are given in Annex B, and other structures meeting the requirements of this part may also be adopted.
4.1.1.2 The optical fiber cable shall be a full-section water blocking structure, that is, water cannot seep longitudinally in the cable core and sheath, except the steel wire armored part outside the sheath and the non-metal rod, tape and wire armored part.
4.1.1.3 The optical fiber cables of the same batch, type and specification shall have the same structural arrangement and the same identification chromatogram.
4.1.2 Cable core
4.1.2.1 General
Generally, the cable core includes central reinforcing member (including possible cushion), loose tube fiber stranded layer (including possible filling rope), possible binding yarn, wrapping tape and non-metal auxiliary reinforcing member, etc.
4.1.2.2 Optical fiber
4.1.2.2.1 The optical fiber in optical fiber cable shall be the same type of coated optical fiber, and the number of cores shall meet the requirements of optical fiber cable specifications. For the same batch of optical fiber cables, optical fibers manufactured with the same design, materials and processes should be adopted.
4.1.2.2.2 The surface of optical fiber coating layer shall be provided with full-color code, and its color shall conform to GB/T 6995.2-2008, and shall not fade or migrate.
4.1.2.2.3 The property of optical fiber used for cabling shall comply with relevant requirements of GB/T 9771.
4.1.2.3 Loose tube and its water blocking material
4.1.2.3.1 The loose tube may be made of polybutylene terephthalate (PBT) plastic, modified polypropylene (PP) plastic, modified polycarbonate (PC) plastic or other suitable plastic. PBT shall meet the requirements of YD/T 1118.1, PP shall meet the requirements of YD/T 1118.2 and PC shall meet the requirements of YD/T 1118.3.
4.1.2.3.2 The number of optical fibers in each loose tube should not be greater than 12, or more cores may be adopted as required by users.
4.1.2.3.3 The nominal outer diameter of the loose tube should be 1.7~3.2mm, and its tolerance shall not be less than ±0.1mm; the thickness shall increase with the increase of outer diameter, its nominal value should be 0.25~0.50mm, and its tolerance shall not be less than ±0.05mm. In addition, the nominal dimension of loose tube may change with the number of optical fiber cores in the tube, but the nominal dimension of loose tube of the same number of cores in the same optical fiber cable should be the same. Other nominal dimensions required by users are allowed.
4.1.2.3.4 The color of each coated optical fiber in the loose tube shall be identifiable, and the colors of 12 or less optical fibers shall be selected from various colors specified in Table 1. Color rings should be added if there are more than 12 cores, or binding yarn may be used to form bundles. The colors of binding yarns shall be selected from Table 1 for identification. Without affecting the recognition, it is allowed to use natural color instead of white color in Table 1.
Contents of YD/T 3350.1-2018
Foreword i
1 Scope
2 Normative references
3 Product classification
3.1 General
3.2 Types
3.3 Specifications
3.4 Product model and designation
4 Requirements
4.1 Structure
4.2 Delivery length
4.3 Property requirements
5 Test methods
5.1 General
5.2 Inspection of optical fiber cable structure
5.3 Inspection of optical fiber cable markings
5.4 Optical fiber cable length inspection
5.5 Mechanical properties of optical fiber cable
5.6 Environmental properties test on optical fiber cables
6 Inspection rules
6.1 General
6.2 Term definition
6.3 End-of-manufacturing inspection
6.4 Type inspection
7 Marking and instructions for use
7.1 Marking
7.2 Instructions for use
8 Packaging, transportation and storage
8.1 Packaging
8.2 Transportation and storage
Annex A (informative) Applicable laying modes and special conditions for main types
Annex B (informative) Schematic diagram for typical gel-free stranded loose tube optical fiber cables
Annex C (informative) Representation method of loose tube color bar
Annex D (normative) Characteristic requirements of single-mode optical fiber in optical fiber cable
Annex E (informative) Temperature characteristics of optical fiber cable after aging
Annex F (informative) Material compatibility test of optical fiber cable
Annex G (informative) Internal freezing test of optical fiber cable
