YD/T 1460.3-2006 English PDF (YD/T1460.3-2006)

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YD/T 1460.3-2006: Telecommunication microduct optical fibre cables and fibre units for installation by blowing. Part 3: Microducts, microduct bundles and microduct accessories
YD/T 1460.3-2006
COMMUNICATION INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 33.180.10
M 33
Telecommunication microduct optical fiber cables and fiber
units for installation by blowing - Part 3: Microducts,
microduct bundles and microduct accessories
ISSUED ON: DECEMBER 11, 2006
IMPLEMENTED ON: JANUARY 01, 2007
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Definitions ... 5 
4 Product model and marking ... 5 
5 Requirements ... 7 
6 Test methods ... 11 
7 Inspection rules ... 18 
8 Packaging, transportation, storage ... 20 
Appendix A (Normative) Basic technical requirements for microduct accessories ... 21 
Appendix B (Informative) Structure diagram of microduct and microduct bundle ... 23 
References ... 24 
Telecommunication microduct optical fiber cables and fiber
units for installation by blowing - Part 3: Microducts,
microduct bundles and microduct accessories
1 Scope
This Part of YD/T 1460 specifies the definition, product model and marking,
requirements, test methods, inspection rules, packaging, transportation, storage of
microducts and microduct bundles, as well as the basic requirements for microduct
accessories.
This Part applies to microducts, microduct bundles, microduct accessories for
installation in outdoor or indoor, by blowing.
2 Normative references
The provisions in following documents become the provisions of this Part through
reference in this Part of YD/T 1460. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Part; however,
parties who reach an agreement based on this Part are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition of
the referenced document applies.
GB/T 2828-2003 Sampling procedures and tables for lot-by-lot inspection by
attributes (Apply to inspection of successive lots or batches) (ISO 2859-1:1999, IDT)
GB/T 6671-2001 Thermoplastics pipes - Determination of longitudinal reversion
(eqv ISO 2505: 1994)
GB 6995.2-1986 Markings for electric cables and wires - Part 2: Standard colours
GB/T 7424.2-2002 Optical fiber cable generic specification - Part 2: Basic optical
cable test procedures (IEC 60794-1-2:1999, Optical fiber cables - Part 1-2: Generic
specification - Basic optical cable test procedures, MOD)
GB/T 8804.1-2003 Thermoplastic pipes - Determination of tensile properties - Part
1: General test method (ISO 6259-1:1997, IDT)
GB/T 8806-1988 Plastics piping systems - Plastics components - Determination of
dimensions
GB/T 9647-2003 Thermoplastics pipes - Determination of ring stiffness (ISO
9969:1994, IDT)
GB/T 14152-2001 Thermoplastic pipes - Determination of resistance to external
blows - Round-The-Clock method (eqv ISO 3127:1994)
GB/T 15820-1995 Test of resistance to pull out of joints between polyethylene (PE)
pressure pipes and fittings (eqv ISO 3501: 1976)
YD/T 837.4-1996 Test method of copper-core, polyolefin insulated, composite
aluminum-plastic sheathed cables for urban local communications - Part 4: Test
method of environmental performances
YD/T 1460.1-2006 Telecommunication microduct optical fiber cables and fiber
units for installation by blowing - Part 1: General
3 Definitions
The following definitions apply to this Part:
3.1
Microduct bundles
See the definition in Article 3.3 of YD/T 1460.1-2006.
3.2
Cable of microduct
See the definition in Article 3.4 of YD/T 1460.1-2006. Microduct cables are also
called bundled ducts.
4 Product model and marking
4.1 Product classification
According to the different combinations of microducts, they can usually be divided into
three types:
(1) Microducts;
(2) Microduct bundles;
(3) Microduct cable.
quantity are connected by an "x" sign.
4.4 Model and marking
4.4.1 Models
Product model consists of type and specification. Different parts are separated by spaces.
4.4.2 Marking
The microduct product marking shall be identified, when processing and ordering,
which consists of the model of the microduct and the serial number of this Part.
Example 1: For the microduct for installation by blowing, which is made of high-
density polyethylene, has an outer diameter of 7.0 mm and an inner diameter of 5.5 mm,
whose duct wall structure is ribbed, THEN, the product marking shall be expressed as:
SYHL 7/5.5 YD/T 1460.3-2006
Example 2: For the microduct bundle for installation by blowing, whose microduct
material is a silicone-plastic composite material, which has a microduct outer diameter
of 7.0 mm and an inner diameter of 5.5 mm, which has a quantity of microducts of 5,
whose duct wall structure is a solid wall, THEN, the microduct bundle product marking
shall be expressed as:
SYHG 7x5 YD/T 1460.3-2006
Example 3: For the microduct cable with metal moisture barrier for installation by
blowing, whose inner microduct material is high-density polyethylene, outer diameter
of the microduct is 7.0 mm and the inner diameter is 5.5 mm, the duct wall structure is
ribbed, which has a quantity of microducts of 19, THEN, the microduct product
marking shall be expressed as:
LYHLM 7x19 YD/T 1460.3-2006
5 Requirements
5.1 General requirements
The provisions of 5.4 and 5.5 of YD/T 1460.1-2006 apply to this Part. When in use,
microducts, microduct bundles or microduct cables must be used, in combination with
corresponding accessories. The requirements of microduct accessories are as shown in
Appendix A.
5.2 Structure
5.2.1 Structure example
After testing in accordance with Article 6.4.6, there shall be no visible damage, to the
outer surface and inner wall of the microduct.
5.3.2.7 Bending
Microducts shall meet the test of 6.4.7. After the test, there shall be no visible damage.
5.3.2.8 Longitudinal retraction
Microducts or microduct bundles shall satisfy the test in Article 6.4.8. After the test, the
longitudinal retraction of the microducts shall be not more than 3%.
5.3.2.9 Ring stiffness
The ring stiffness of the microducts shall not be less than 6.3 kN/m2.
5.3.2.10 Connection force with pipe joint
The connection force between the pipe and the joint shall not be less than 350 N; the
connection shall not be loose or obviously deformed.
5.3.3 Environmental performance
5.3.3.1 Air pressure
(a) In the exit-factory inspection, it is required that the microduct or microduct
bundle shall be able to withstand the air pressure of 1.2 MPa for 30 min, without
air leakage, under the normal temperature of 20 °C.
(b) During the type test, it is required that after 240 h at a high temperature of 100 °C,
the microduct or microduct bundle shall be able to withstand the air pressure of
1.2 MPa, without breaking.
5.3.3.2 Water pressure tightness
The microducts, which are connected by microduct joints, shall be airtight as a whole
AND meet the test requirements of 6.5.3.
5.3.3.3 Freezing
There are no freezing requirements for microducts.
Put the microduct at -15 °C for 10 h, the tube shall have no cracks or breaks, meanwhile
there shall be no obvious cracks and defects in appearance.
5.3.3.4 Electric spark test
This property is only required for those containing metal components.
the end of the microduct, for the integrity and structure of the microduct; the inner wall
can be viewed with a light source.
6.3 Dimensional inspection
6.3.1 Length
The delivery length is measured by a metering device, whose measurement error must
not be negative. The measurement error is determined by a steel tape measure, which
has an accuracy of 1 mm.
6.3.2 Outer diameter and wall thickness
The measurement of outer diameter and wall thickness and its deviation shall be carried
out, according to the provisions of GB/T 8806-1988.
6.3.3 Minimum inner diameter
Take 3 specimens. Use vernier calipers, which have an accuracy of 0.02 mm, to measure
the inner diameter of each specimen, on the same cross-section. Take the minimum
value as the minimum inner diameter value of the specimen. Use the measurement
results, to calculate the deviation. Take the measured value of the 3 specimens, which
has the largest deviation, as the measurement result.
6.4 Measurement methods of mechanical properties
6.4.1 General requirements
The following test methods and test conditions are used, to verify the mechanical
properties of the product. When the test results meet the requirements of Chapter 5, and
it is judged to be qualified.
6.4.2 Tensile property
6.4.2.1 Tensile strength and elongation at break
Test equipment: It shall comply with the provisions of GB/T 8804.1-2003. The accuracy
shall be within ±1% of the displayed force value. The special fixture shall evenly clamp
the pipe wall, on the entire circumference of the pipe;
Specimen preparation: Take a pipe, which has a length of (250 ± 10) mm as a specimen;
the number of specimens is 3;
Tensile speed: 100 mm/min;
Acceptance requirements: Calculate the tensile strength and elongation at break,
according to the method specified in GB/T 8804.1-2003. Take the average value of the
measurement of 3 specimens, as the test result. The test results shall meet the
requirements of Table 3.
6.4.3 Maximum traction load
Test method: Same as Article 6.4.2.1.
Test result: It is the product of the tensile strength of the pipe multiplying the cross-
sectional area of the pipe.
6.4.4 Flattening performance
Test method: It is carried out, according to the provisions of GB/T 9647-2003;
Specimens: Take a 250 mm pipe segment from each of the 3 pipes, as a specimen;
Flattening load: See Table 4;
Duration: It lasts 1 min;
Test speed: (10 ± 5) mm/min;
Number of tests: 1 test for each specimen, 3 tests in total.
Acceptance requirements: Microducts shall not crack and have no permanent damage,
under flattening load.
6.4.5 Recovery rate
Specimen preparation: Take a 200 mm pipe segment from each of the 3 microducts as
a specimen; both ends of the specimen shall be vertically cut flat;
Compression speed: (10 ± 0.4) mm/min;
Test method: Apply pressure in the vertical direction. When the deformation of the outer
diameter is 30% of the initial outer diameter, unload immediately. Visually observe
whether the specimen is cracked or delaminated. Measure the minimum outer diameter
of the flattened part, after 1 h of recovery;
Acceptance requirements: It shall meet the requirements of 5.3.2.4.
6.4.6 Drop weight impact
Test method: GB/T 14152-2001;
Number of specimens: 10;
Punch diameter: 25 mm;
Drop weight: 100 g for microduct; 300 g for microduct bundle; 1500 g for microduct
Acceptance requirements: The microduct shall have no leaks; the air pressure shall not
be lower than 12bar; there shall be no visible damage.
6.5.2.2 Air pressure after high temperature
Specimen length: Not less than 500 mm;
Test temperature: 100 °C;
Hold time: 240 h;
Air pressure: Apply at least 12bar air pressure to the specimen, at 23 °C ± 5 °C;
Acceptance requirements: Microducts shall not rupture and show no visible damage.
6.5.3 Water pressure tightness
There are two methods for connection tightness test; it can choose one of them:
(a) Connect the microduct and the microduct joint, according to the requirements of
use; fill the pipe with water at 23 °C ± 5 °C; seal both ends; keep it for 24 h. If
there is no leakage, it is qualified;
(b) Connect the microduct and the microduct joint, according to the requirements of
use, apply 1 MPa water pressure, at 23 °C ± 5 °C; seal both ends; keep it for 3
min. If there is no leakage, it is qualified;
6.5.4 Freezing (not required for microduct cables)
Take a segment of specimen. Fill the specimen with tap water, at 23 °C ± 5 °C. Seal
both ends. Keep it at -15 °C, for 10 hours. If the pipe does not burst or crack, AND the
appearance has no obvious cracks and defects, it is qualified.
6.6 Test method for blowing performance
6.6.1 Blowing efficiency
The blowing efficiency test method of microducts shall comply with the provisions in
7.2.1 of YD/T 1460.1-2006.
6.6.2 Friction coefficient of inner wall
The static friction coefficient of the inner wall of the microduct is measured, by the flat
plate method. The test method shall comply with the provisions of Appendix B of YD/T
1460.1-2006.
The dynamic friction coefficient of the inner wall of the microduct is measured, by the
drum method. The test method shall comply with the provisions of Appendix C of YD/T
1460.1-2006.
6.6.3 Rigidity
Test method: It is carried, in accordance with the method E17A or E17B of GB/T
7424.2-2002;
Acceptance requirements: The test results shall meet the requirements of Table 5.
7 Inspection rules
7.1 General
The manufacturer shall establish a quality assurance system, to ensure that the product
quality meets the requirements of this standard. Microduct products shall be inspected
by the quality inspection department of the manufacturer. Only those, that pass the
inspection AND have the product quality certificate of the manufacturer, can leave the
factory. The manufacturer shall provide the buyer, with the test records of the product's
exit-factory inspection.
Microduct product inspection is divided into exit-factory inspection and type inspection.
Inspection items and test methods shall comply with the provisions of this Chapter and
Chapter 6. Unless otherwise specified in the order contract, the inspection rules shall
comply with the provisions of this chapter.
7.2 Exit-factory inspection
7.2.1 Exit-factory inspection items
The exit-factory inspection items are as shown in Table 6.
7.2.2 Sampling
7.2.2.1 Group-batching
Pipes of the same specification, which are produced under the same batch of raw
materials, using the same formula and process, are a batch.
7.2.2.2 Sampling
For the appearance and size inspection of microduc...