This standard specifies the grade, specification, technical requirements, test methods, inspection rules, transportation, storage, use regulations, factory certification, etc. of prestressed concrete water pipes (vibration extrusion process). This standard applies to bidirectional prestressed concrete water pipes with a nominal diameter of 400~2000mm and a hydrostatic pressure of 0.4~1.2MPa manufactured by the "vibration extrusion process" (one-stage process). GB 5695-1994 Prestressed concrete water pipes (vibration extrusion process) GB5695-1994 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Prestressed vibrohydropressed concrete pipe for water
(vibration extrusion process)
Prestressed vibrohydropressed concrete pipe for water
1 Subject content and scope of application
GB 5695-94
Replaces GB5695·85
This standard specifies the grade, specification, technical requirements, test methods, inspection rules, transportation, storage, use regulations, factory certification, etc. of prestressed concrete pipe for water (vibration extrusion process) products. This standard applies to socket-type bidirectional prestressed concrete pipe for water with a nominal diameter of 400-2000mm and a hydrostatic pressure of 0.4-1.2MPa manufactured by "vibration extrusion process" (stage process). Water or soil that is corrosive to the pipe body and sealing ring should be protected before laying and use. Non-standard pipes whose nominal diameter and hydrostatic pressure are not within the scope specified in this standard can refer to this standard for implementation. Cited standards
Portland cement, ordinary Portland cementbzxZ.net
GB 175
GB1344Slag Portland cement, pozzolanic Portland cement and fly ash Portland cementHeat-treated steel bars for prestressed concrete
GB4463
Steel wire for prestressed concrete
GB5223
GB 5224
GB 8076
Steel twisted wire for prestressed concrete
Concrete admixtures
GB 11837
Concrete pipesConcrete compressive strength test methodGB/T 14684
GB/T14685
GB/T 15345
ZB Q43 001
ZB Q43 002
Sand for construction
Pebbles and crushed stones for construction
Test methods for prestressed concrete water pipes
Rubber seals for prestressed and self-stressed reinforced concrete pipes Test methods for rubber seals for prestressed and self-stressed reinforced concrete pipes JGJ63 Standard for water for concrete mixing
3 Product classification
3.1 Pipe level: According to the hydrostatic pressure during the use of the pipeline, the pipe is divided into five levels, see Table 1. Approved by the State Administration of Technical Supervision on December 22, 1994, implemented on August 1, 1995
Hydrostatic pressure
GB5695-94
Pipe level
Note: () Each level of products is designed under the conditions of Sushi foundation, burial depth of 0.8~2.0m, ground allowance of two car-15 grade vehicle loads and corresponding level of hydrostatic pressure.
②When the pipe is not laid under the above-mentioned conditions, the design and calculation shall be carried out according to the ground load, burial depth, hydrostatic pressure, etc. 3.2 Quality grade: According to the appearance quality, dimensional deviation and performance under hydrostatic test pressure of the pipe, it is divided into superior products (A), first-class products (B), and qualified products (C).
3.3 Code and mark: Indicated by forming process (YYG), quality grade, (English letters), pipe grade (Roman numerals), nominal diameter (mm), and standard number; the Chinese pinyin initial combination "YYG" represents vibration extrusion prestressed pipe. Example: Prestressed concrete pipe made by vibration extrusion process, nominal diameter 800mm, pipe grade is re-grade, superior product. YYGA800GB5695
4 Specifications and dimensions
The basic dimensions of pipes manufactured by vibration extrusion process shall comply with the provisions of Figure 1 and Table 2. 4.1
Figure 1 Pipe shape
Nominal diameter
YYG-400
YYG-500
Inner diameter of pipe
Basic dimensions and reference weight
Effective length
Pipe length
Simplified wall thickness
Protective layer thickness
Reference weight
YYG-600
YYG-700
YYG-800
YYG-900
YYG-1 000
YYG-1 200
YYG-1 400
YYG-1 600
Nominal diameter
Inner diameter of pipe body
GB 5695-94
Continued table 2
Effective length
Pipe body length
Simplified wall thickness
Protective layer thickness
Reference weight
YYG-1 800
YYG-2 000
Nominal diameter
Inner diameter of pipe body
GB5695—94
Continued table 2
Effective length
Pipe body length
Note: ①Protective layer thickness refers to the thickness from the outer wall surface of the pipe body to the inner annular surface of the annular prestressed steel bar. ②Nominal diameter refers to the dimension from the socket end to 200mm inside the pipe. ③ According to the conditions and needs, pipes with an effective length of 4000mm can be produced. 4.2 The detailed dimensions of the socket and spigot should comply with the requirements of Figure 2 and Table 3 and Table 4. L.
Simplified wall thickness
Thickness of protective layer
Reference weight
aao8a8a8
Figure 2 Pipe joint
Nominal diameter
Nominal diameter
Outer diameter of socket
GB 5695-94
Outer guide slope diameter
Detailed size of socket
Working surface diameter
Detailed size of plug
Outer diameter of simplified pipe
Inner slope diameter
Working surface diameter
Length of straight section
Projected length of slope
Outer diameter of stopper
5 Technical requirements
GB5695—94
5.1 Pipes should be produced and inspected in accordance with the provisions of this standard and the product design structure drawing. 5.2 Raw material quality:
5.2.1 Cement: Use silicate cement, ordinary silicate cement and slag silicate cement of not less than No. 425 in GB175 and GB1344 standards.
5.2.2 Sand: It shall comply with the provisions of GB/T14684 standard, and the mud content shall not be greater than 1%. 5.2.3 Crushed stone or pebbles: It shall comply with the provisions of GB/T14685 standard. The maximum particle size of gravel shall not be greater than 25mm or the clear distance of annular reinforcement, and shall not be greater than one-fourth of the thickness of the pipe wall
5.2.4 Water for concrete mixing: It shall not reduce the product quality and water delivery quality, and shall comply with the requirements of JGJ63. 5.2.5 Admixtures: It shall comply with the relevant provisions of GB8076 standard. 5.2.6 Prestressed annular reinforcement and longitudinal reinforcement shall use the reinforcement specified in GB4463, GB5223 and GB5224 standards. 5.3 Concrete strength:
5.3.1 The strength grade of concrete used for pipe making shall not be lower than C50.5.3.2 When the annular prestressed steel bar transmits force to the pipe body, the demoulding strength of each grade of pipe in the hot state shall not be lower than the value listed in Table 5.5.3.3 The concrete strength of the pipe should not be lower than 90% of the strength grade when it leaves the factory.5.3.4 The demoulding strength and 28d strength are determined by multiplying the strength of the standard cubic specimen by the strength improvement coefficient; the strength improvement coefficient is determined by each factory through experiments, and 1.5 can be used when there is no sufficient experimental basis in this factory.5.4 Appearance quality:
5.4.1 The working surface of the socket, the inner wall of the pipe body, the quality of the outer wall, defects and repairs of pipes of various quality grades shall meet the requirements of Table 6.5.4.2 When the spigot mold and the pipe mold are misaligned, the outer surface of the pipe body shall not be higher than the glue stop. 5.4.3 The exposed longitudinal reinforcement at the pipe end must be burned off and burned into the concrete 5mm, and the pits should be filled with non-toxic anti-corrosion materials such as mortar. 5.4.4 When making pipes, the scum left on the pipe body imprint at the mold joint should be removed and compacted and smoothed with mortar. 5.5 The allowable deviation of the pipe body size shall not exceed the provisions of Table 7. Table 5 Demolding strength (hot state)
Nominal diameter
Pipe grade
160018002000
Inspection items
Socket working surface
Socket working surface
Pipe body inner wall
Pipe body outer wall
Defect repair
Quality grade
Superior product
First-class product
Qualified product
Superior product
Qualified product
Superior product
First-class product
Qualified Quality
Superior quality
First-class quality
Qualified quality
Superior quality
First-class quality
Qualified quality
Inspection items
Working surface diameter
Working surface length
Working surface diameter
Outer diameter of stop glue table
GB5695—94
Table 6 Appearance quality
Nominal diameter, mm
400~～2000
Smooth and flat, no honeycomb, peeling, no defects. Smooth and flat, no honeycomb, peeling, defect concave-convex degree is not more than 1mm, area is not more than 20 mm. Smooth and flat, no honeycomb or peeling, defect convexity no more than 2 mm, area no more than 30 mm2 Smooth and flat, no honeycomb, scratches, peeling The inner wall should be smooth and flat, the depth of local pits should not be greater than one twentieth of the wall thickness The inner wall should be flat, the depth of local pits should not be greater than one tenth of the wall thickness. The inner wall should be flat, the depth of local pits should not be greater than one fifth of the wall thickness There should be no structural cracks or hollows, and the protective layer should not fall off. The cumulative area of ​​hollows does not exceed 0.04m2. For other products of the same grade, no other repairs are allowed except for the longitudinal reinforcement head. The repair is complete, the bonding is firm, the surface is smooth and flat, and there should be no limit deviation of the size of the repair table 7
Quality grade
Superior product
First-class product
Qualified product
Superior product
First-class product
Qualified product
Superior product
First-class product
Qualified product
Superior product
-Class product
Qualified product
1 00012001400160018002000
Inspection Items
Pipe Wall Thickness
Thickness of Protective Layer
Quality Grade
Superior Product
First-Class Product
Qualified Product
Superior Product
First-Class Product
Qualified Product
Superior Product
First-Class Product
Qualified Product
GB 5695--94
Continued?
100012001400160018002000
Note: Under the condition of allowable dimensional deviation, the allowable difference between the major and minor diameters of the working surface diameter of the socket is: 3mm when the nominal diameter is less than or equal to 900mm; 4mm when it is greater than 900mm.
5.6 Hydrostatic pressure test:
5.6.1 The pipe impermeability and joint sealing test pressure indicators must meet the requirements of Table 8. Table 8 Impermeability test pressure
Pipe grade
Test pressure
5.6.2 Under the impermeability test pressure, the pipe body impermeability performance and joint sealing performance shall meet the requirements of Table 9. Table 9 Performance of pipes under hydrostatic test pressure Nominal diameter, mm
Hydrostatic pressure test
Impenetration performance
Sealing performance
Crack resistance
Quality grade
Superior products
First-class products
Qualified products
Superior products
First-class products
Qualified products
Superior products
Qualified products
800900100012001400160018002000700
There should be no damp patches on the outer surface of the pipe body.
For every square meter of surface area, the damp patch area shall not exceed 20cm2 and shall be less than or equal to 3 places. The pipe body surface shall not sweat, drip or spray.
For every square meter of surface area, the damp patch area shall not exceed 40cm and shall be less than or equal to 5 places. The surface of the pipe body shall not sweat, drip or spray. No dripping shall be done after one test.
Refilling is allowed. No dripping shall be done after one retest.
No cracking shall be done under the crack test pressure.
No cracking shall be done under the crack test pressure, but double retest is allowed. 5.6.3 The crack test pressure of the pipe shall meet the requirements of Table 10. 207
Pipe grade
Nominal diameter, mm
GB5695-94
Crack test pressure
Crack test pressure
Note: The values ​​listed in the table are horizontal test pressure indicators, and the values ​​in brackets are vertical test pressure indicators. 5.6.4 Under the crack test pressure, the crack resistance performance of the pipe body shall meet the requirements of Table 9. 5.6.5 The relative rotation angle allowed for the pipe is listed in Table 11. Under the seepage test pressure, the joint shall not drip. Table 11 Allowable relative rotation angle
Nominal diameter, mm
400~700
800~1400
1 600～2000
5.7 The longitudinal prestress value of the annular section of the pipe cylinder shall not be less than the provisions of Table 12. Relative rotation angle, (°)
Table 12 Longitudinal prestress value of the annular section of the pipe cylinder Nominal diameter, mm
Pipe grade
6 Test method
GB 5695--94
6.1 The specifications, dimensions, appearance quality, hydrostatic pressure, etc. of the pipe shall be carried out in accordance with GB/T15345. 6.2 The same batch of concrete mixture and the same vibration molding method as the pipe making are used to make a cubic specimen with a side length of 100mm. After applying a uniform pressure of 0.03MPa on the surface of the specimen, it is cured under the same conditions to determine the demoulding strength and 28d strength according to GB11837 standard.
6.3 The stress value of the longitudinal prestressed steel bars is determined by a "three-point stress instrument". 7 Inspection rules
7.1 Product inspection is divided into factory inspection and type inspection. 7.2 Factory inspection:
7.2.1 Factory inspection items include appearance quality, dimensional deviation, hydrostatic pressure, concrete strength and other related items. 7.2.2 Batch: 100 pipes of the same model made of homogeneous materials and the same process are an inspection batch; less than 100 pipes, but not less than 30 pipes, can also be regarded as a batch.
7.2.3 Sampling: The appearance quality is inspected one by one, and the number of major dimensional deviations is shown in Table 13. Table 13 Sampling quantity of main dimensional deviation of pipes Test items
Inner diameter of pipe D.
Thickness of pipe wall 5
Length of working surface
Diameter of working surface D3
Diameter of working surface D6
Displacement at glue stop
Thickness of protective layer h (factory)
Sampling quantity
According to user requirements, but not more than 2%
Hydrostatic pressure test, impermeability and joint sealing performance are tested one by one, and two are randomly selected for crack resistance water pressure test. Concrete strength, demoulding strength of circumferential prestressed steel bars transmitting force to concrete and pipe exit strength should be regularly checked and recorded for acceptance.
Control stress value of circumferential and longitudinal prestressed steel bars tensioning, regularly checked and recorded. 7.2.4 Determination: When the factory inspection results meet the corresponding grade requirements of this standard, it is judged as this grade. 7.2.5 During factory inspection, measures should be taken to deal with the following situations. 7.2.5.1 If the pipe is defective or bruised, or if the pipe fails the appearance inspection, it shall be repaired and then re-inspected for appearance quality. 7.2.5.2 If the pipe fails the impermeability test and joint sealing performance test, it shall be re-inspected after repair, wet curing or reinstallation. If it still fails, it shall be downgraded and the grade pipe shall be downgraded to a substandard product. 7.2.5.3 If there is one unqualified pipe in the crack resistance test, double the number of pipes shall be re-inspected; if there is still one unqualified pipe, the batch of pipes shall be inspected one by one or downgraded for acceptance and use.
7.2.6 The user unit has the right to cooperate with the manufacturer to re-inspect the pipes delivered for use in accordance with the requirements of the impermeability and crack resistance test of this standard. 7.3 Type inspection:
7.3.1 Type inspection shall be carried out when one of the following situations occurs. New products or old products are tested for conversion, trial and finalization, a.
GB 5695--94
After formal production, if there are major changes in product structure, materials and processes that may affect product performance; b.
In normal production, an inspection should be carried out once a year; c.
When the product is resumed after a long period of suspension, d.
When there is a significant difference between the factory inspection result and the most recent type inspection result; when the national quality supervision agency proposes a request for inspection. The batch regulations for type inspection are the same as those for factory inspection. See Table 14 for inspection items and sampling quantity.
Table 14 Inspection items and sampling quantity for type inspection Sequence
Appearance quality
Main dimensions
Working surface of socket
Working surface of insert
Outer wall of pipe body
Inner wall of pipe body
Treatment of longitudinal reinforcement head
Inspection items
Repair quality and missed repair situation
Inner diameter of pipe body
Outer diameter of stopper
Socket Working surface diameter
Working surface diameter of socket
Working surface length of socket
Thickness of protective layer
Anti-crack performance of pipe body
Anti-seepage performance of pipe body
Physical propertiesSealing performance of joint
Sealing performance of corner joint
Concrete strength
7.3.4Judgment rules:
When all test results reach the corresponding level of this standard, it shall be judged as this level. 8 Marking, transportation and storage
Number of sampling
Randomly selected from 2 pipes
Randomly selected from 6 pipes
Randomly selected from 10 pipes
Same as anti-doping test samples
Inspection records
8.1 The outer surface of the socket of each pipe should be marked with the manufacturer's name, code mark, model, manufacturing date and words such as "strictly prohibited from collision"; those with "registered trademark" should also be marked.
Marking style:
Code, mark (strictly prohibited from collision)
Registered trademark, manufacturer's name Portuguese Pipe 8.2 When rolling the pipe with a roller, the socket end and the spigot end are not allowed to hit the ground. 8.3 During long-distance transportation, the socket and spigot ends should be properly wrapped to prevent damage; the bottom plate of the transportation vehicle should be equipped with saddle-shaped pads to prevent the pipe from moving. 8.4 When loading, unloading and transporting, they must be handled with care. Throwing and collision are strictly prohibited. 8.5 Pipes should be stacked according to their codes and marks. 210
8.6 The number of pipe stacking layers should not exceed the requirements of Table 15. Nominal diameter, mm
Number of stacking layers
400500600
GB 5695--94
Table 15 Number of stacking layers
9001 000
8.7 Two parallel pads should be set under the first layer of pipes in each pile to prevent the first layer of pipes from rolling
The socket end of one layer and the spigot end of another layer should be staggered and stacked, and both ends should be padded with straw mats. 8.8 In dry climate conditions, it is advisable to sprinkle water regularly to keep the pipes moist. Regulations for use
9.1 Pipeline laying and installation shall comply with the relevant regulations of the cement pressure pipe water pipeline construction regulations. [14001600
18002 000
9.2 Pipes and sealing rings should be supplied in pairs. The rubber rings shall not pollute the water quality. The specifications of the rubber rings (recommended values) are shown in Appendix A. Round rubber sealing rings for socket joints (reference parts).
The performance of rubber sealing rings and their test methods shall be implemented in accordance with ZBQ43001 and ZBQ43002. 10. Certificate of export
The certificate shall include the following contents:
model, specification, quality grade, quantity and pipe number; appearance inspection result;
hydraulic pressure test result (impermeability, sealing and crack resistance); concrete strength grade;
production date and export date;
product standard number;
manufacturer name and trademark;
signature and seal of the quality inspection department of the manufacturer;
rubber ring supply certificate.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.