YD 1268.2-2003[YD/T 1268.2-2003] The safety specification and test method for lithium battery charger (English PDF)

5.2003 " Optical fiber cables - Part 5.Sectional specification - Microduct cabling for

installation by blowing"; the main performance indicators of the product refer to the

IEC Committee CD document 86A/867/CD"60794-3-50.2003 "Optical fiber cables -

Part 3-50.Outdoor fiber cables - Sectional specification for microduct cabling for

installation by blowing" (first edition).

Appendix A of this Part is a normative appendix. Appendix B is an informative

appendix.

This Part was proposed by AND shall be under the jurisdiction of China

Communications Standardization Association.

Drafting organizations of this Part. Wuhan Research Institute of Posts and

Telecommunications, Datang Telecom Technology Industry Group, Changfei Optical

Fiber and Cable Co., Ltd., Jiangsu Zhongtian Technology Co., Ltd., Sichuan Huiyuan

Optical Communication Co., Ltd., Beijing Tonghe Shiyi Telecommunications Science

and Technology Research Institute Ltd.

4.1 Product classification

According to the different combinations of microducts, they can usually be divided into

three types.

4.2 Types

4.2.1 Type composition

Product's type marking includes product category, material, construction, as shown in

Figure 1.

4.2.2 Product category

4.3 Specifications

4.3.1 Specifications of microducts

The specifications of the microducts consist of the outer and inner diameters of the

microducts. The outer diameter and the inner diameter are connected by a "/" 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

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

Examples of structures for microducts, microduct bundles, microduct cables are as

shown in Appendix B.

5.2.4 Microduct bundles

Microduct bundles are formed by the collection of a certain number of microducts

(bundling). It can be installed in the existing outer protective tube at one time, BUT

cannot fill the entire outer protective tube. The duty cycle shall not be greater than 60%.

5.2.5 Microduct cables

Where there are waterproof and moisture-proof requirements, the microduct cable shall

have a moisture barrier. The material of the moisture barrier shall be such, that can block

water and moisture. The sheath of the microduct cable shall be able to completely cover

the microduct bundles therein; the thickness should be 0.8 mm.

5.3 Technical requirements

5.3.3 Environmental performance

5.3.3.1 Air pressure

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.

5.4 Delivery length

The nominal value of the standard manufacturing length of the microduct should be

6.1 General

The properties of the microducts shall be tested, according to the test methods specified

in Table 6.

6.2 Microduct structure inspection

The microduct structure shall be visually inspected, at no less than 100 mm away from

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.

6.4 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

6.5 Measurement methods of environmental performance

6.5.1 General

The test methods and test conditions, which are specified below, are used to verify the

environmental performance of the product. When the test results meet the specified

qualification criteria, it is judged to be qualified.

6.5.2 Air pressure

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.

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

7.2.3 Judgment rules

For the size in Article 5.2, in the n samples in accordance with the sampling scheme in

Table 7, if there are less than or equal to Ac samples, that do not meet the requirements,

the batch is judged to be qualified. If there are more than or equal to Re samples, that

do not meet the requirements, the batch is judged to be unqualified. If one of the items

in 5.3 fails to meet the indicator, it may randomly select double quantity of samples, for

re-inspection of the item. If it is still unqualified, the batch will be judged unqualified.

7.3 Type inspection

7.3.1 Inspection conditions

In one of the following cases, type inspection shall be carried out.

7.3.2 Inspection items

The items of type inspection are all items in Table 6.

7.3.3 Sampling

For the specimens, which are used for type inspection, they shall be randomly taken

Batch size N Sample size n Acceptance number Ac Rejection number Re

from the qualified products in the exit-factory inspection. The number of samples shall

meet the requirements of each item in Chapter 6.

7.3.5 Sample processing

For the samples for type inspection, regardless of whether they are qualified or not, they

are not allowed to leave the factory.

8.1 Packaging

The microducts are packed in wooden discs; the inner end must be drawn out and

protected against impact, to facilitate the inflation in the microducts. The diameter of

the inner circle of the wooden disc shall not be less than the minimum bending diameter

of the microduct or microduct bundle.

8.3 Storage

8.3.1 Storage field

The storage field shall be flat and neatly stacked. The stacking height shall not exceed

8.3.2 Storage temperature

-20 °C ± 60 °C.

YD/T 1460.3-2006

COMMUNICATION INDUSTRY STANDARD

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

5.2003 " Optical fiber cables - Part 5.Sectional specification - Microduct cabling for

installation by blowing"; the main performance indicators of the product refer to the

IEC Committee CD document 86A/867/CD"60794-3-50.2003 "Optical fiber cables -

Part 3-50.Outdoor fiber cables - Sectional specification for microduct cabling for

installation by blowing" (first edition).

Appendix A of this Part is a normative appendix. Appendix B is an informative

appendix.

This Part was proposed by AND shall be under the jurisdiction of China

Communications Standardization Association.

Drafting organizations of this Part. Wuhan Research Institute of Posts and

Telecommunications, Datang Telecom Technology Industry Group, Changfei Optical

Fiber and Cable Co., Ltd., Jiangsu Zhongtian Technology Co., Ltd., Sichuan Huiyuan

Optical Communication Co., Ltd., Beijing Tonghe Shiyi Telecommunications Science

and Technology Research Institute Ltd.

4.1 Product classification

According to the different combinations of microducts, they can usually be divided into

three types.

4.2 Types

4.2.1 Type composition

Product's type marking includes product category, material, construction, as shown in

Figure 1.

4.2.2 Product category

4.3 Specifications

4.3.1 Specifications of microducts

The specifications of the microducts consist of the outer and inner diameters of the

microducts. The outer diameter and the inner diameter are connected by a "/" 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

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

Examples of structures for microducts, microduct bundles, microduct cables are as

shown in Appendix B.

5.2.4 Microduct bundles

Microduct bundles are formed by the collection of a certain number of microducts

(bundling). It can be installed in the existing outer protective tube at one time, BUT

cannot fill the entire outer protective tube. The duty cycle shall not be greater than 60%.

5.2.5 Microduct cables

Where there are waterproof and moisture-proof requirements, the microduct cable shall

have a moisture barrier. The material of the moisture barrier shall be such, that can block

water and moisture. The sheath of the microduct cable shall be able to completely cover

the microduct bundles therein; the thickness should be 0.8 mm.

5.3 Technical requirements

5.3.3 Environmental performance

5.3.3.1 Air pressure

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.

5.4 Delivery length

The nominal value of the standard manufacturing length of the microduct should be

6.1 General

The properties of the microducts shall be tested, according to the test methods specified

in Table 6.

6.2 Microduct structure inspection

The microduct structure shall be visually inspected, at no less than 100 mm away from

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.

6.4 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

6.5 Measurement methods of environmental performance

6.5.1 General

The test methods and test conditions, which are specified below, are used to verify the

environmental performance of the product. When the test results meet the specified

qualification criteria, it is judged to be qualified.

6.5.2 Air pressure

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.

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

7.2.3 Judgment rules

For the size in Article 5.2, in the n samples in accordance with the sampling scheme in

Table 7, if there are less than or equal to Ac samples, that do not meet the requirements,

the batch is judged to be qualified. If there are more than or equal to Re samples, that

do not meet the requirements, the batch is judged to be unqualified. If one of the items

in 5.3 fails to meet the indicator, it may randomly select double quantity of samples, for

re-inspection of the item. If it is still unqualified, the batch will be judged unqualified.

7.3 Type inspection

7.3.1 Inspection conditions

In one of the following cases, type inspection shall be carried out.

7.3.2 Inspection items

The items of type inspection are all items in Table 6.

7.3.3 Sampling

For the specimens, which are used for type inspection, they shall be randomly taken

Batch size N Sample size n Acceptance number Ac Rejection number Re

from the qualified products in the exit-factory inspection. The number of samples shall

meet the requirements of each item in Chapter 6.

7.3.5 Sample processing

For the samples for type inspection, regardless of whether they are qualified or not, they

are not allowed to leave the factory.

8.1 Packaging

The microducts are packed in wooden discs; the inner end must be drawn out and

protected against impact, to facilitate the inflation in the microducts. The diameter of

the inner circle of the wooden disc shall not be less than the minimum bending diameter

of the microduct or microduct bundle.

8.3 Storage

8.3.1 Storage field

The storage field shall be flat and neatly stacked. The stacking height shall not exceed

8.3.2 Storage temperature

-20 °C ± 60 °C.

......