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YD/T 841-1996

Chinese Standard: 'YD/T 841-1996'
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Detail Information of YD/T 841-1996; YD/T841-1996; YDT 841-1996; YDT841-1996
Description (Translated English): (Underground communications pipe with plastic pipe)
Sector / Industry: Telecommunication Industry Standard (Recommended)
Classification of Chinese Standard: M42
Word Count Estimation: 17,000
Date of Issue: 4/4/1996
Date of Implementation: 1/9/1996
Regulation (derived from): Information-Ministry-Science [2008] 150

YD/T 841-1996
YD
TELECOM INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
M 42
Underground communication pipe
with plastic pipe
地下通信管道用塑料管
ISSUED ON. APRIL 4, 1996
IMPLEMENTED ON. SEPTEMBER 1, 1996
Issued by. Ministry of Posts and Telecommunications of the People's
Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Product Classification, Model and Label ... 5 
4 Shape and Structure Size of Pipes ... 6 
5 Technical Requirements ... 12 
6 Test Methods ... 14 
7 Inspection Rules ... 18 
8 Label, Transportation, and Storage ... 19 
Appendix A ... 20 
Foreword
This Standard was proposed on the premise of widely promoting the new structure
plastic pipe in the developed countries; it is aimed to reform the backwardness of
domestic use of cement pipe block, and achieve modernization.
When this Standard was proposed, some developed countries had prepared the
formal standards on the stress-free delivery plastic pipe including plastic pipe for
underground communication pipe, such as German DIN 16961, American ASTM
F949-89; however, there is no unique standard prepared for the communication
plastic pipe. European Organization for Standardization published a draft on
stress-free pipe; International Organization for Standardization (ISO) published
several individual provisions concerning this aspect, thereof including the most
important aperture series, which plays an important role for preparing this Standard.
“Rigid PVC (PVC-U) Double-wall Corrugated Pipe” issued by Chinese Ministry of
Light Industry, and several performance standards approved to be issued by State
Bureau of Technical Supervision also play a guiding role for preparing this Standard.
Appendix A of this Standard is informative.
This Standard was proposed and shall be under the jurisdiction of China Academy
of Telecom Research and Planning of Ministry of Post and Telegraph.
Drafting organizations of this Standard. China Association of Senior Scientists and
Technicians Post and Telecommunications Branch, and Beijing Design Institute of
Ministry of Post and Telegraph.
Chief drafting staffs of this Standard. Liu Huai, Kong Guanghai, and Yang
Zhenzhong..
The Standard was firstly published on April 4, 1996.
Underground communication pipe
with plastic pipe
1 Scope
This Standard specifies the classification and type, shape and structure size, technical
requirements, test methods, inspection rules, labels, package, transportation and
storage of underground communication pipe used rigid PVC, and high and low density
polyethylene plastic pipe (hereinafter referred to as pipe) products.
This Standard is applicable to the outdoor communication cable and fiber optic cable
pipe systems within the local network range, which include trunk pipeline, feeder
pipeline, wiring pipeline, and private network pipeline. In addition to the specifically
provided long-distance communication pipeline, others can also refer to this
Standard. .
2 Normative References
The following standards contain provisions which, through reference in this Standard,
constitute provisions of this Standard. At the time of publication, the editions indicated
are valid. All standards are subject to revision. The parties who are using this
Standard shall explore the possibility of using the latest version of the following
standards.
GB 2828-81 Sampling Procedures and Tables for Lot-by-Lot Inspection by
Attributes (Apply to Inspection of Successive Lots or Batches)
GB 2918-82 Plastics - Standard Atmospheres for Conditioning and Testing
GB 6671.2-86 Polyethylene (PE) Pipes - Determination of Longitudinal Reversion
GB 8804.2-88 Test Methods of Tensile Properties for Thermoplastic Pipes -
Polyethylene (PE) Pipes
GB 8805-88 Determination of Deflection for Rigid Plastic Pipes
GB 8806-88 Method for Dimension Measuring of Plastic Pipes
GB 96467-88 Test Method for External Loading Resistance for Plastic Pipe
GB/T 13849-93 Local Telecommunication Cables with Polyolefin Insulation and
Polyolefin Sheath
GB/T 14152-93 Thermoplastic Pipes – Determination of Resistance to External
Impact – True Impact Rate Method
YD/T 630-93 Test Method of Copper-Core, Polyolefin Insulated, Composite
Aluminum-Plastic Sheathed Cables for Urban Local Communications
ZB G 33008-89 PVC Corrugated Pipe
3 Product Classification, Model and Label
3.1 Product classification
Communication plastic cable pipe can be classified into the following ones as per the
materials.
--- High density polyethylene (HDPE) pipe taking high density polyethylene as the
main material;
--- Rigid PVC (PVC-U) pipe taking rigid PVC a the main material.
It can be classified into the following pipes as per the structure.
--- Double-wall corrugated pipe with smooth internal wall and corrugated
external wall (“double-wall corrugated pipe” for short);
--- Composite foam pipe with smooth internal and external wall, and intermediate
containing foam layer (“composite foam pipe” for short);
--- Solid wall plastic pipe with smooth internal and external wall (“solid wall pipe” for
short);
--- Single-wall corrugated pipe with uneven internal and external wall.
It can be classified into the following pipes as per the molding appearance.
--- Hard straight pipe;
--- Hard bent pipe;
--- Rotatable pipe.
3.2 Product model and label
Product model and label consists of prefix, material, structure, molding appearance,
outside/inside diameter and plant name.
4.5 Refer to Table 1 for the pipe structure and size; the diameter of pipe used in the
same city shall be consistent as much as possible; refer to Appendix A for the
application range of various pipe diameters.
Table 1 mm
Nominal
Diameter
Allowable Deviation of Outside
Diameter Minimum Inside Diameter
di min
Pipe Length Application Range Composite foam,
solid wall pipe
Double-wall
corrugated pipe
+0.4
+0.3
+0.3
+0.3
+0.3
+0.4
-0.7
+0.3
- 0.6
+0.3
-0.5
+0.3
-0.4
+0.3
-0.3
±30
Beyond the penetrate and put
standard series
Little use of extra-large cable
Feeder pipe
From feeder pipe to the connection
cabinet, special network
Wiring pipe
Fiber optic cable
Note.
1. Allowable deviation between composite foam pipe and solid wall pipe shall be positive value, which is expressed by
, thereof, x shall be equal or more than the larger value of the following two ones.
a) 0.3mm;
b) 0.003de, the value less than 0.1mm shall be calculated as 0.1mm.
2. The maximum outside diameter and minimum inside diameter among composite foam pipe, solid wall pipe and
double-wall corrugated pipe equal.
3. The ratio between maximum outside diameter and minimum inside diameter of double-wall corrugated pipe shall be
1.009.1.
The color and luster of pipe shall be uniform; it shall be black or gray, which is
determined by the buyer and seller, however, it must be different from other similar
underground plastic pipes. The color of sub-pipes penetrating into the same large
diameter of plastic pipe shall be different.
5.2 Appearance
a) Pipe wall is not allowed to have air bubbles, cracks, discoloration
decomposition line, and obvious impurities. The waveform of corrugated pipe shall
be even, having no shortened wave.
b) The internal walls of composite foam pipe and solid wall pipe are required to be
smooth; and the medial incision is also required to be smooth.
c) The internal walls of double-wall corrugated pipe are required to be smooth; slight
fluctuation of the internal wall is allowed during the wave forming.
d) The internal and external walls of the double-wall corrugated pipe shall be closely
frit; and no opening phenomenon shall occur.
5.3 Size and deviation
5.3.1 Pipe length deviation shall conform to the provisions in Table 1.
5.3.2 Pipe average outsider diameter, minimum inside diameter, and its deviation
shall conform to the provisions of Table 1.
5.3.3 The same cross-sectional thickness deviation between......
Related standard:   YD/T 841.6-2017  YD/T 841.7-2017
   
 
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