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YD/T 841-1996 (YDT841-1996)

YD/T 841-1996_English: PDF (YDT 841-1996, YDT841-1996)
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YD/T 841-1996English155 Add to Cart 0--9 seconds. Auto-delivery Underground communication pipe with plastic pipe YD/T 841-1996 Obsolete YD/T 841-1996
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Standard ID YD/T 841-1996 (YD/T841-1996)
Description (Translated English) Underground communication pipe with plastic pipe
Sector / Industry Telecommunication Industry Standard (Recommended)
Classification of Chinese Standard M42
Word Count Estimation 17,133
Date of Issue 1996/4/4
Date of Implementation 1996/9/1
Regulation (derived from) Information-Ministry-Science [2008] 150

YD/T 841-1996
M 42
Underground communication pipe
with plastic pipe
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 
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
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
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
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
--- 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
--- 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
Allowable Deviation of Outside
Diameter Minimum Inside Diameter
di min
Pipe Length Application Range Composite foam,
solid wall pipe
corrugated pipe
- 0.6
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
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
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 composite foam pipe
and solid wall pipe shall be no more than 14%.
5.3.4 Pipe minimum socket’s average inside diameter and depth shall conform to
the provisions in Table 2.
5.3.5 Pipe bent in the same direction shall be less than 2%.
5.4 Physical and mechanical properties
5.4.1 Pipe’s physical and mechanical properties shall conform to the requirements in
Table 5.
Table 5
Items Technical Indicators Test Methods
Drop hammer impact (0°C) 9/10 no breaking See Clause 6.5.1
Ring stiffness (kN/m2) ≥6.3 See Clause 6.5.2
Flattering test No breaking See Clause 6.5.3
Coefficient of friction Dry putting ≤0.363 Applying swell soil ≤0.155
Connection sealing test No leakage See Clause 6.5.4
Note. coefficient of friction refers to the one when the internal wall of pipe penetrates the low density
sheath cables. Test methods is to be determined.
5.4.2 Cold-bending radius of curvatu...