CJJ 30-1989 Construction and acceptance regulations for rigid polyvinyl chloride pipes for building drainage CJJ30-89
Some standard content:
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Standards of the Ministry of Construction of the People's Republic of China
Construction drainage rigid polyvinyl chloride pipes
Construction and acceptance regulations
30—89
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Engineering construction standards full text information system
Construction drainage rigid polyvinyl chloride pipes
Construction and acceptance regulations
Editor: Shanghai Institute of Building Construction Technology Approval department: China Ministry of Construction of the People's Republic of China Date of implementation: October 1, 1989
Engineering Construction Standards Full Text Information System
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Engineering Construction Standards Full Text Information System
Notice on the release of the Ministry's standard "Design Code for Rigid Polyvinyl Chloride Pipes for Building Drainage"
(89) Jianbiaozi No. 130
"Construction and Acceptance Code for Rigid Polyvinyl Chloride Pipes for Building Drainage" has been reviewed and approved by our Ministry as a Ministry standard, numbered CJJ30-89, and will be implemented from October 1, 1989. If you have any questions or comments during the implementation process, please inform the editor-in-chief of this standard, Shanghai Institute of Building Construction Technology.
This standard is published by China Architecture & Building Press and distributed by Xinhua Bookstores in various places. Ministry of Construction of the People's Republic of China
March 25, 1989
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General Provisions
Chapter 2 Materials
Section 1 General Provisions
Section 2 Types and Quality
Section 3 Transportation, Loading and Unloading and Storage
Chapter 3 Pipeline Installation
Section 1 General Provisions
Section 2 Installation Procedures and Quality Requirements
Chapter 4 Project Acceptance
Chapter 5||tt| |Safety in production
Appendix Precautions for the construction of threaded rigid polyvinyl chloride drainage pipes Additional instructions
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Chapter 1 General provisions
Article 1.0.1 In order to achieve advanced technology, economic rationality, safety and applicability, and ensure quality in the installation, construction and acceptance of rigid polyvinyl chloride pipeline projects for building drainage, this regulation is specially formulated.
Article 1.0.2
This regulation applies to the construction and acceptance of rigid polyvinyl chloride pipelines for building drainage.
Article 1.0.3 Before construction, the following conditions shall be met for pipeline installation projects: 1. The design drawings and other technical documents are complete and have been reviewed and approved; 2. There is an approved construction plan or construction organization design, and technical disclosure has been carried out; 3. Materials, construction forces, machinery and tools are ready to ensure normal construction; 4. There is a material storage warehouse at the construction site to meet the construction needs. Article 1.0.4 Pipeline installation projects must be constructed according to the design drawings, and the design unit's consent document must be obtained when modifying the design. Article 1.0.5 Pipes and fittings shall comply with the provisions of (GB5836-86) "Hard Polyvinyl Chloride Pipes and Fittings for Building Drainage". Other materials such as adhesives shall also comply with national standards.
Article 1.0.6 In addition to implementing this regulation, the installation project of the pipeline system shall also comply with the relevant provisions of (GBJ242-82) "Construction and Acceptance Specifications for Heating and Sanitary Engineering" and other quality inspection and evaluation standards for building installation projects. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 2 Materials
Section 1 General Provisions
Article 2.1.1 Pipes, pipe fittings and other materials should have product certificates issued by the quality inspection department, and should have obvious signs indicating the name and specifications of the manufacturer. The packaging should be marked with the batch number, quantity, production date and inspection code. Article 2.1.2 Adhesives must be marked with the manufacturer's name, factory date and service life, and must have a factory certificate and instructions. Section 2 Types and Quality
Article 2.2.1
The outer diameter of pipes mainly has the following five specifications: 40mm, 50mm, 75mm, 110mm and 160mm.
Article 2.2.2 Pipe fittings mainly include the following ten varieties: 45° elbow, 90° elbow, 90° tee, 45° oblique tee, bottle tee, straight cross, 45° oblique cross, right angle cross, reducer and pipe clamp.
Article 2.2.3 The allowable deviation of pipes shall not exceed the provisions of Table 2-2-3. Allowable deviation of pipes (mm)
Basic dimensions
Basic dimensions
Table 2-2-3
The wall thickness deviation of the same section of pipes shall not exceed 14%, and the wall thickness deviation shall be calculated according to the following formula:
In the formula. —Wall thickness deviation (%);
i—the maximum wall thickness of the same section of a pipe (mm); 82—the minimum wall thickness of the same section of a pipe (mm). The wall thickness of a pipe fitting shall not be less than the wall thickness of the corresponding pipe. Article 2.2.4 The quality of pipes and fittings shall comply with the following provisions: 1. The color of pipes and fittings shall be consistent, without uneven color and decomposition discoloration lines. 2. The inner and outer walls of the pipe shall be smooth, flat, free of bubbles, cracks, obvious marks and depressions.
3. The end face of the pipe must be flat and perpendicular to the axis. 4. The pipe is not allowed to have anisotropic bending, and the tolerance of straightness shall be less than 0.3%. 5. Pipe fittings shall be complete and without defects, the gates and overflow edges shall be repaired and flat, and the inner and outer surfaces shall be smooth without obvious marks.
6. The physical and mechanical performance indicators of pipes and fittings shall comply with the provisions of Table 2-2-4.
Physical and mechanical properties of pipes and fittings
Test items
Tensile strength
Vicat softening temperature
Flat test
Drop hammer impact test
Hydraulic test
Drop test
Longitudinal dimensional change rate
>41.19MPa
>79℃
No cracks when pressed to the outer diameter||tt| |The sample does not crack
1.226MPa, maintain for 1min
No leakage
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Table 2-2-4
>70℃
No crack under the specified test pressure
No damage
Engineering Construction Standard Full Text Information System
The performance of pipes and fittings used in cold areas should meet the local climatic conditions.
Article 2.2.5 Pipes and fittings should be sampled from the same batch for appearance, specification size and necessary physical and mechanical properties inspection. If the specified quality standards are not met and there is an objection to the production unit, an arbitration test shall be conducted by the arbitration unit specified by the local authorities in accordance with the relevant provisions of GB5836-86 "Hard Polyvinyl Chloride Pipes and Fittings for Building Drainage". Article 2.2.6 The adhesive shall not contain lumps, insoluble particles and other impurities; it shall not be in a gelled state, and there shall be no stratification; there shall be no precipitates without stirring; different types of adhesives shall not be mixed. The performance of adhesives used in cold areas must adapt to local climatic conditions. Section 3 Transportation, loading and unloading and storage
Article 2.3.1 Pipes should be bundled, and the weight of each bundle should not exceed 50kg. Pipe fittings should be packed separately according to different specifications and shall not be bulked. Article 2.3.2 Pipes and pipe fittings should be handled with care during transportation, loading and unloading and moving. They should be arranged neatly and shall not be subjected to severe impact, contact with sharp objects, and shall not be thrown, dropped, rolled, dragged or exposed to the sun. Special attention must be paid in cold areas or severe winter climates. It is strictly forbidden to place pipes on pipe fittings when transporting them in the same vehicle. Article 2.3.3 Pipes and pipe fittings should be stored in a warehouse with a temperature not exceeding 40℃, and the distance from the heat source shall not be less than 1m. The warehouse should have good ventilation. Article 2.3.4 Pipes should be stacked horizontally on a flat ground. If supported by cushions, the width should be no less than 75mm, the spacing should be no more than 1m, and the overhanging end should not exceed 0.5m. The stacking height should not exceed 1.5m, and irregular stacking and exposure are not allowed.
Article 2.3.5 Pipe fittings should not be stacked too high. All pipe fittings that can be placed upright should be stacked neatly layer by layer. Pipe fittings that cannot be placed upright should also be arranged neatly in the same direction or with their sockets relatively aligned.
Article 2.3.6 Adhesives and cleaning agents such as acetone are flammable and must be kept away from fire sources during storage, transportation and use. The storage place should be safe and reliable, cool and dry, and should be taken out as needed.
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Engineering Construction Standard Full Text Information System
Chapter 3 Pipeline Installation
Section 1 General Provisions
Policies Article 3.1.1 Before installing the pipeline, you should understand the structure and plane and facade composition of the building. Be familiar with the design drawings and construction plans of the drainage project and its coordination measures with the civil engineering project.
Article 3.1.2
Article The installation of drainage pipes above the ground must be carried out after the buried pipes are laid and the acceptance procedures are completed.
Article 3.1.3 Buried pipes should be laid when the base soil is flat, solid and reliable.
Article 3.1.4 When the buried pipe passes through the reserved hole of the foundation, it must be constructed in accordance with the designed position and elevation in cooperation with the civil engineering. When there is no design requirement, the clearance above the pipe top is generally not less than 150mm.
Article 3.1.5
Article When the buried pipe passes through the basement wall, strict waterproofing measures must be taken in accordance with the design requirements.
Article 3.1.6 During the entire floor structure construction process, the reserved holes and drilling work for the pipes to pass through the walls and floor slabs should be coordinated with the civil engineering. If there is no clear specification in the design, the hole size can be 50~100mm larger than the outer diameter of the pipe. Article 3.1.7 Before installing the pipeline, it is necessary to check whether the position and elevation of the reserved holes are accurate. And the dirt and debris on the pipes and pipe fittings must be removed. Article 3.1.8 The installation of the pipeline system should be completed continuously after the wall painting is completed. When the installation is interrupted, the opening should be temporarily closed. Article 3.1.9 When the temperature difference between the construction site and the material storage warehouse is large, the pipes and pipe fittings should be placed on site for a certain period of time before installation to make their temperature close to the ambient temperature. Article 3.1.10 The vertical pipe must be equipped with an inspection port according to the design requirements. The location and orientation of the inspection port should be convenient for maintenance. The concealed vertical pipe should be equipped with an inspection door at the inspection port. The horizontal pipe must also be equipped with a cleaning port according to the design requirements. Article 3.1.11 The vertical pipe and the horizontal pipe should be equipped with expansion joints and fixed brackets according to the design requirements. The gap reserved for the pipe end to be inserted into the expansion joint should be: 5~10mm in summer; 15~20mm in winter.
Article 3.1.12 The inner wall of the support should be smooth, and a micro gap should be left between it and the pipe body.
Article 3.1.13 The spacing of pipe supports shall not exceed 1.5m for vertical pipes with an outer diameter of 50mm; shall not exceed 2m for vertical pipes with an outer diameter of 75mm and above, and shall not exceed the provisions of Table 3.1.13 for horizontal pipes.
The spacing of horizontal pipe supports
Outer diameter (mm)
Spacing (mm)
Article 3.1.14 The slope of the horizontal pipe shall comply with the standard slope of 2.6%. Table 3-1-13
The distance between the outer side of the vertical pipe socket and the finish shall be controlled between 20 and Article 3.1.15
50mm.
Article 3.1.16
The piping and bonding process of pipelines must be carried out in accordance with the following provisions:
1. Pipe sawing and beveling
(1) The sawing length of the pipe should be determined layer by layer based on actual measurement and combined with the dimensions of each connector.
(2) Pipe sawing tools should be fine-toothed saws, cutting knives, pipe cutters and other machines. The fracture should be flat and perpendicular to the axis, and there should be no deformation at the cross section. (3) The plug can be filed into a 15-30° bevel with a medium-sized plate file. The bevel thickness should be ~ of the pipe wall thickness, and the length is generally not less than 3mm. After the beveling is completed, the debris should be cleaned up.
2. Cleaning of bonding surface
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Before bonding, the pipe or pipe fitting should be wiped clean with cotton yarn or dry cloth on the inside of the socket and the outside of the plug to keep the bonded surface clean and free of dust, sand and water marks. When the surface is stained with oil, it must be wiped clean with cotton yarn dipped in acetone or other cleaning agents. 3. Depth of pipe end insertion into the socket
When piping, the pipe and pipe fitting socket should be tried once, and marks should be drawn on the surface. The depth of the pipe end inserted into the socket shall not be less than the provisions of Table 3.1.16. Depth of pipe inserted into the socket of pipe fitting (mm)
4. Adhesive application
Table 3-1-16
Depth of pipe end inserted into the socket
When brushing the adhesive with an oil brush on the outside of the spigot to be bonded and the inside of the spigot to be bonded, the adhesive should be applied axially, quickly and evenly, and the amount of adhesive applied should be appropriate, without missing or too thick. Particular attention should be paid during winter construction, and the spigot should be applied first and then the spigot. 5. Connection of socket and spigot joints
After applying the adhesive on the spigot and socket, the pipe should be inserted into the socket in the correct direction, aligned, and then squeezed. The insertion depth of the pipe end should be consistent with the marked mark, and the straightness and position of the spigot and socket joint should be ensured to be correct. It should also be kept still for 2 to 3 minutes to prevent the joint from slipping. The error between the nodes of the prefabricated pipe section should not exceed 5mm. 6. Maintenance of the socket joint
After the socket joint is connected, the extruded adhesive should be wiped clean with cotton yarn or dry cloth dipped in detergent. Let it stand until the joint is solidified according to the performance of the adhesive and the climatic conditions. The curing time should be appropriately extended during winter construction. Article 3.1.17 When the pipeline is blocked, it is not allowed to use tools with sharp edges and sharp mouths to clear it.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Section 2 Installation Procedures and Quality Requirements
Article 3.2.1 The installation of buried pipes should be carried out in accordance with the following procedures: 1. The buried pipeline should be constructed in two sections. The first section is the indoor part below ±0.00, until it extends out of the outer wall. After the civil construction is completed, the second section will be laid and connected to the inspection well from the outer wall.
Note: When the buried pipe is a cast iron pipe, the outer side of the bottom plastic pipe inserted into its socket should be roughened with sandpaper first. After insertion, fill it evenly with hemp silk and twist the mouth with asbestos cement. Cement mortar shall not be used. Care should be taken to prevent the plastic pipe from deforming during operation.
2. According to the position of the pipeline on the design drawing, determine the elevation and lay out the line. After verification, dig the trench to the designed depth.
3. Check and clear all reserved holes.
4. Measure according to the position of each water inlet and the direction of the pipeline, draw a small sample drawing of the actual measurement and indicate the size in detail.
5. Select qualified pipes and fittings according to the small sample drawing of the actual measurement, and carry out piping and prefabrication.
Sixth, the trench of the ground pipeline should have a flat bottom surface without protruding sharp objects. Generally, a 100~150mm sand cushion layer can be made. The width of the cushion layer should not be less than 2.5 times the diameter of the pipe, and the slope should be the same as the slope of the pipe. It must be filled with fine soil or sand to at least 100mm above the top of the pipe.
Seventh, after the pipeline is installed and verified, a water filling test must be carried out. The water filling height should not be lower than the ground height of the bottom layer. After 15 minutes of full water, if the water level drops, refill it for 5 minutes. It is qualified if the liquid level does not drop. After draining the water, the accumulated water in the water seal of the water trap should be wiped out.
Eighth, after the water filling test, the pipe openings of each water receiving pipe should be closed and the holes should be filled. The backfill soil must be carried out in layers and compacted with a wooden rammer. If mechanical backfilling is used, a layer of manual backfilling should be carried out first, and its thickness should not be less than 300mm from the top of the pipe. IX. The water filling test shall be hosted by the construction unit and relevant personnel shall be invited to participate. After the test is qualified, the concealed project acceptance shall be handled. Article 3.2.2 The installation of floor pipes shall be carried out in accordance with the following procedures: Engineering Construction Standard Full Text Information System
KAONTKAca-Article 7 Before installing the pipeline, it is necessary to check whether the position and elevation of the reserved holes are accurate. And the dirt and debris on the pipes and pipe fittings must be removed. Article 3.1.8 The installation of the pipeline system should be completed continuously after the wall painting is completed. When the installation is interrupted, the opening should be temporarily closed. Article 3.1.9 When the temperature difference between the construction site and the material storage warehouse is large, the pipes and pipe fittings should be placed on site for a certain period of time before installation to make their temperature close to the ambient temperature. Article 3.1.10 The vertical pipe must be equipped with an inspection port according to the design requirements. The location and direction of the inspection port should be convenient for maintenance. The concealed vertical pipe should be equipped with an inspection door at the inspection port. The horizontal pipe must also be equipped with a cleaning port according to the design requirements. Article 3.1.11 Both the vertical pipe and the horizontal pipe should be equipped with expansion joints and fixed brackets according to the design requirements. The gap reserved for the pipe end to be inserted into the expansion joint should be: 5~10mm in summer; 15~20mm in winter.
Article 3.1.12 The inner wall of the support should be smooth, and a slight gap should be left between the pipe body.
Article 3.1.13 The spacing of pipeline supports should not exceed 1.5m for vertical pipes with an outer diameter of 50mm; should not exceed 2m for those with an outer diameter of 75mm and above, and should not exceed the provisions of Table 3.1.13 for horizontal pipes.
Spacing of horizontal pipe supports
Outer diameter (mm)
Spacing (mm)
Article 3.1.14 The slope of the horizontal pipe should meet the standard slope of 2.6%. Table 3-1-13
The distance between the outer side of the vertical pipe socket and the finish should be controlled between 20 and Article 3.1.15
50mm.
Article 3.1.16
The piping and bonding process of pipelines must be carried out in accordance with the following provisions:
1. Pipe sawing and beveling
(1) The sawing length of the pipe should be determined layer by layer based on actual measurement and combined with the dimensions of each connector.
(2) Pipe sawing tools should be fine-toothed saws, cutting knives, pipe cutters and other machines. The fracture should be flat and perpendicular to the axis, and there should be no deformation at the cross section. (3) The plug can be filed into a 15-30° bevel with a medium-sized plate file. The bevel thickness should be ~ of the pipe wall thickness, and the length is generally not less than 3mm. After the beveling is completed, the debris should be cleaned up.
2. Cleaning of bonding surface
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Engineering Construction Standard Full Text Information System
Before bonding, the pipe or pipe fitting should be wiped clean with cotton yarn or dry cloth on the inside of the socket and the outside of the plug to keep the bonded surface clean and free of dust, sand and water marks. When the surface is stained with oil, it must be wiped clean with cotton yarn dipped in acetone or other cleaning agents. 3. Depth of pipe end insertion into the socket
When piping, the pipe and pipe fitting socket should be tried once, and marks should be drawn on the surface. The depth of the pipe end inserted into the socket shall not be less than the provisions of Table 3.1.16. Depth of pipe inserted into the socket of pipe fitting (mm)
4. Adhesive application
Table 3-1-16
Depth of pipe end inserted into the socket
When brushing the adhesive with an oil brush on the outside of the spigot to be bonded and the inside of the spigot to be bonded, the adhesive should be applied axially, quickly and evenly, and the amount of adhesive applied should be appropriate, without missing or too thick. Particular attention should be paid during winter construction, and the spigot should be applied first and then the spigot. 5. Connection of socket and spigot joints
After applying the adhesive on the spigot and socket, the pipe should be inserted into the socket in the correct direction, aligned, and then squeezed. The insertion depth of the pipe end should be consistent with the marked mark, and the straightness and position of the spigot and socket joint should be ensured to be correct. It should also be kept still for 2 to 3 minutes to prevent the joint from slipping. The error between the nodes of the prefabricated pipe section should not exceed 5mm. 6. Maintenance of the socket joint
After the socket joint is connected, the extruded adhesive should be wiped clean with cotton yarn or dry cloth dipped in detergent. Let it stand until the joint is solidified according to the performance of the adhesive and the climatic conditions. The curing time should be appropriately extended during winter construction. Article 3.1.17 When the pipeline is blocked, it is not allowed to use tools with sharp edges and sharp mouths to clear it.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Section 2 Installation Procedures and Quality Requirements
Article 3.2.1 The installation of buried pipes should be carried out in accordance with the following procedures: 1. The buried pipeline should be constructed in two sections. The first section is the indoor part below ±0.00, until it extends out of the outer wall. After the civil construction is completed, the second section will be laid and connected to the inspection well from the outer wall.
Note: When the buried pipe is a cast iron pipe, the outer side of the bottom plastic pipe inserted into its socket should be roughened with sandpaper first. After insertion, fill it evenly with hemp silk and twist the mouth with asbestos cement. Cement mortar shall not be used. Care should be taken to prevent the plastic pipe from deforming during operation.
2. According to the position of the pipeline on the design drawing, determine the elevation and lay out the line. After verification, dig the trench to the designed depth.
3. Check and clear all reserved holes.
4. Measure according to the position of each water inlet and the direction of the pipeline, draw a small sample drawing of the actual measurement and indicate the size in detail.
5. Select qualified pipes and fittings according to the small sample drawing of the actual measurement, and carry out piping and prefabrication.
Sixth, the trench of the ground pipeline should have a flat bottom surface without protruding sharp objects. Generally, a 100~150mm sand cushion layer can be made. The width of the cushion layer should not be less than 2.5 times the diameter of the pipe, and the slope should be the same as the slope of the pipe. It must be filled with fine soil or sand to at least 100mm above the top of the pipe.
Seventh, after the pipeline is installed and verified, a water filling test must be carried out. The water filling height should not be lower than the ground height of the bottom layer. After 15 minutes of full water, if the water level drops, refill it for 5 minutes. It is qualified if the liquid level does not drop. After draining the water, the accumulated water in the water seal of the water trap should be wiped out.
Eighth, after the water filling test, the pipe openings of each water receiving pipe should be closed and the holes should be filled. The backfill soil must be carried out in layers and compacted with a wooden rammer. If mechanical backfilling is used, a layer of manual backfilling should be carried out first, and its thickness should not be less than 300mm from the top of the pipe. IX. The water filling test shall be hosted by the construction unit and relevant personnel shall be invited to participate. After the test is qualified, the concealed project acceptance shall be handled. Article 3.2.2 The installation of floor pipes shall be carried out in accordance with the following procedures: Engineering Construction Standard Full Text Information System
KAONTKAca-Article 7 Before installing the pipeline, it is necessary to check whether the position and elevation of the reserved holes are accurate. And the dirt and debris on the pipes and pipe fittings must be removed. Article 3.1.8 The installation of the pipeline system should be completed continuously after the wall painting is completed. When the installation is interrupted, the opening should be temporarily closed. Article 3.1.9 When the temperature difference between the construction site and the material storage warehouse is large, the pipes and pipe fittings should be placed on site for a certain period of time before installation to make their temperature close to the ambient temperature. Article 3.1.10 The vertical pipe must be equipped with an inspection port according to the design requirements. The location and direction of the inspection port should be convenient for maintenance. The concealed vertical pipe should be equipped with an inspection door at the inspection port. The horizontal pipe must also be equipped with a cleaning port according to the design requirements. Article 3.1.11 Both the vertical pipe and the horizontal pipe should be equipped with expansion joints and fixed brackets according to the design requirements. The gap reserved for the pipe end to be inserted into the expansion joint should be: 5~10mm in summer; 15~20mm in winter.
Article 3.1.12 The inner wall of the support should be smooth, and a slight gap should be left between the pipe body.
Article 3.1.13 The spacing of pipeline supports should not exceed 1.5m for vertical pipes with an outer diameter of 50mm; should not exceed 2m for those with an outer diameter of 75mm and above, and should not exceed the provisions of Table 3.1.13 for horizontal pipes.
Spacing of horizontal pipe supports
Outer diameter (mm)
Spacing (mm)
Article 3.1.14 The slope of the horizontal pipe should meet the standard slope of 2.6%. Table 3-1-13
The distance between the outer side of the vertical pipe socket and the finish should be controlled between 20 and Article 3.1.15
50mm.
Article 3.1.16
The piping and bonding process of pipelines must be carried out in accordance with the following provisions:
1. Pipe sawing and beveling
(1) The sawing length of the pipe should be determined layer by layer based on actual measurement and combined with the dimensions of each connector.
(2) Pipe sawing tools should be fine-toothed saws, cutting knives, pipe cutters and other machines. The fracture should be flat and perpendicular to the axis, and there should be no deformation at the cross section. (3) The plug can be filed into a 15-30° bevel with a medium-sized plate file. The bevel thickness should be ~ of the pipe wall thickness, and the length is generally not less than 3mm. After the beveling is completed, the debris should be cleaned up.
2. Cleaning of bonding surface
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Engineering Construction Standard Full Text Information System
Before bonding, the pipe or pipe fitting should be wiped clean with cotton yarn or dry cloth on the inside of the socket and the outside of the plug to keep the bonded surface clean and free of dust, sand and water marks. When the surface is stained with oil, it must be wiped clean with cotton yarn dipped in acetone or other cleaning agents. 3. Depth of pipe end insertion into the socket
When piping, the pipe and pipe fitting socket should be tried once, and marks should be drawn on the surface. The depth of the pipe end inserted into the socket shall not be less than the provisions of Table 3.1.16. Depth of pipe inserted into the socket of pipe fitting (mm)
4. Adhesive application
Table 3-1-16
Depth of pipe end inserted into the socket
When brushing the adhesive with an oil brush on the outside of the spigot to be bonded and the inside of the spigot to be bonded, the adhesive should be applied axially, quickly and evenly, and the amount of adhesive applied should be appropriate, without missing or too thick. Particular attention should be paid during winter construction, and the spigot should be applied first and then the spigot. 5. Connection of socket and spigot joints
After applying the adhesive on the spigot and socket, the pipe should be inserted into the socket in the correct direction, aligned, and then squeezed. The insertion depth of the pipe end should be consistent with the marked mark, and the straightness and position of the spigot and socket joint should be ensured to be correct. It should also be kept still for 2 to 3 minutes to prevent the joint from slipping. The error between the nodes of the prefabricated pipe section should not exceed 5mm. 6. Maintenance of the socket joint
After the socket joint is connected, the extruded adhesive should be wiped clean with cotton yarn or dry cloth dipped in detergent. Let it stand until the joint is solidified according to the performance of the adhesive and the climatic conditions. The curing time should be appropriately extended during winter construction. Article 3.1.17 When the pipeline is blocked, it is not allowed to use tools with sharp edges and sharp mouths to clear it.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Section 2 Installation Procedures and Quality Requirements
Article 3.2.1 The installation of buried pipes should be carried out in accordance with the following procedures: 1. The buried pipeline should be constructed in two sections. The first section is the indoor part below ±0.00, until it extends out of the outer wall. After the civil construction is completed, the second section will be laid and connected to the inspection well from the outer wall.
Note: When the buried pipe is a cast iron pipe, the outer side of the bottom plastic pipe inserted into its socket should be roughened with sandpaper first. After insertion, fill it evenly with hemp silk and twist the mouth with asbestos cement. Cement mortar shall not be used. Care should be taken to prevent the plastic pipe from deforming during operation.
2. According to the position of the pipeline on the design drawing, determine the elevation and lay out the line. After verification, dig the trench to the designed depth.
3. Check and clear all reserved holes.
4. Measure according to the position of each water inlet and the direction of the pipeline, draw a small sample drawing of the actual measurement and indicate the size in detail.
5. Select qualified pipes and fittings according to the small sample drawing of the actual measurement, and carry out piping and prefabrication.
Sixth, the trench of the ground pipeline should have a flat bottom surface without protruding sharp objects. Generally, a 100~150mm sand cushion layer can be made. The width of the cushion layer should not be less than 2.5 times the diameter of the pipe, and the slope should be the same as the slope of the pipe. It must be filled with fine soil or sand to at least 100mm above the top of the pipe.
Seventh, after the pipeline is installed and verified, a water filling test must be carried out. The water filling height should not be lower than the ground height of the bottom layer. After 15 minutes of full water, if the water level drops, refill it for 5 minutes. It is qualified if the liquid level does not drop. After draining the water, the accumulated water in the water seal of the water trap should be wiped out.
Eighth, after the water filling test, the pipe openings of each water receiving pipe should be closed and the holes should be filled. The backfill soil must be carried out in layers and compacted with a wooden rammer. If mechanical backfilling is used, a layer of manual backfilling should be carried out first, and its thickness should not be less than 300mm from the top of the pipe. IX. The water filling test shall be hosted by the construction unit and relevant personnel shall be invited to participate. After the test is qualified, the concealed project acceptance shall be handled. Article 3.2.2 The installation of floor pipes shall be carried out in accordance with the following procedures: Engineering Construction Standard Full Text Information System
KAONTKAca-Depth of pipe end inserted into socket
When piping, the pipe and the socket of the pipe fitting should be tried to be inserted once, and a mark should be drawn on the surface. The depth of the pipe end inserted into the socket shall not be less than the provisions of Table 3.1.16. Depth of pipe end inserted into the socket of the pipe fitting (mm)
4. Adhesive application
Table 3-1-16
Depth of pipe end inserted into the socket
When brushing the adhesive with an oil brush on the outside of the bonded socket and the inside of the bonded socket, the adhesive should be applied axially, quickly and evenly, and the amount of adhesive applied should be appropriate, without missing or too thick. Special attention should be paid during winter construction, and the socket should be applied first, and then the socket. 5. Connection of socket and spigot joints
After brushing the adhesive on the socket and spigot, the pipe should be inserted into the socket in the correct direction, aligned, and then squeezed. The insertion depth of the pipe end should be consistent with the marked mark, and the straightness and position of the socket joint should be guaranteed. It should also be kept still for 2 to 3 minutes to prevent the joint from slipping. The error between the nodes of the prefabricated pipe section should not exceed 5mm. 6. Maintenance of the socket joint
After the socket joint is connected, the extruded adhesive should be wiped clean with cotton yarn or dry cloth dipped in detergent. According to the performance of the adhesive and climatic conditions, let it stand until the joint is solidified. The curing time should be appropriately extended during winter construction. Article 3.1.17 When the pipeline is blocked, it is not allowed to use tools with sharp edges and sharp mouths to clear it.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Section 2 Installation Procedures and Quality Requirements
Article 3.2.1 The installation of buried pipes should be carried out in accordance with the following procedures: 1. The buried pipe should be constructed in two sections. The first section is the indoor part below ±0.00, until it extends out of the outer wall. After the civil construction is completed, the second section will be laid and connected to the inspection well from the outer wall.
Note: When the buried pipe is a cast iron pipe, the outer side of the bottom plastic pipe inserted into its socket should be roughened with sandpaper first. After insertion, fill it evenly with hemp silk and twist the mouth with asbestos cement. Cement mortar shall not be used. Care should be taken to prevent the plastic pipe from deforming during operation.
2. According to the position of the pipeline on the design drawing, determine the elevation and lay out the line. After verification, dig the trench to the designed depth.
3. Check and smooth the reserved holes.
4. Measure according to the position of each water inlet and the direction of the pipeline, draw a small sample drawing of the actual measurement and indicate the size in detail.
5. Select qualified pipes and pipe fittings according to the small sample drawing of the actual measurement, and carry out piping and prefabrication.
Sixth, the trench of the ground pipeline should have a flat bottom surface without protruding sharp objects. Generally, a 100~150mm sand cushion layer can be made. The width of the cushion layer should not be less than 2.5 times the diameter of the pipe, and the slope should be the same as the slope of the pipe. It must be filled with fine soil or sand to at least 100mm above the top of the pipe.
Seventh, after the pipeline is installed and verified, a water filling test must be carried out. The water filling height should not be lower than the ground height of the bottom layer. After 15 minutes of full water, if the water level drops, refill it for 5 minutes. It is qualified if the liquid level does not drop. After draining the water, the accumulated water in the water seal of the water trap should be wiped out.
Eighth, after the water filling test, the pipe openings of each water receiving pipe should be closed and the holes should be filled. The backfill soil must be carried out in layers and compacted with a wooden rammer. If mechanical backfilling is used, a layer of manual backfilling should be carried out first, and its thickness should not be less than 300mm from the top of the pipe. IX. The water filling test shall be hosted by the construction unit and relevant personnel shall be invited to participate. After the test is qualified, the concealed project acceptance shall be handled. Article 3.2.2 The installation of floor pipes shall be carried out in accordance with the following procedures: Engineering Construction Standard Full Text Information System
KAONTKAca-Depth of pipe end inserted into socket
When piping, the pipe and the socket of the pipe fitting should be tried to be inserted once, and a mark should be drawn on the surface. The depth of the pipe end inserted into the socket shall not be less than the provisions of Table 3.1.16. Depth of pipe end inserted into the socket of the pipe fitting (mm)
4. Adhesive application
Table 3-1-16
Depth of pipe end inserted into the socket
When brushing the adhesive with an oil brush on the outside of the bonded socket and the inside of the bonded socket, the adhesive should be applied axially, quickly and evenly, and the amount of adhesive applied should be appropriate, without missing or too thick. Special attention should be paid during winter construction, and the socket should be applied first, and then the socket. 5. Connection of socket and spigot joints
After brushing the adhesive on the socket and spigot, the pipe should be inserted into the socket in the correct direction, aligned, and then squeezed. The insertion depth of the pipe end should be consistent with the marked mark, and the straightness and position of the socket joint should be guaranteed. It should also be kept still for 2 to 3 minutes to prevent the joint from slipping. The error between the nodes of the prefabricated pipe section should not exceed 5mm. 6. Maintenance of the socket joint
After the socket joint is connected, the extruded adhesive should be wiped clean with cotton yarn or dry cloth dipped in detergent. According to the performance of the adhesive and climatic conditions, let it stand until the joint is solidified. The curing time should be appropriately extended during winter construction. Article 3.1.17 When the pipeline is blocked, it is not allowed to use tools with sharp edges and sharp mouths to clear it.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Section 2 Installation Procedures and Quality Requirements
Article 3.2.1 The installation of buried pipes should be carried out in accordance with the following procedures: 1. The buried pipe should be constructed in two sections. The first section is the indoor part below ±0.00, until it extends out of the outer wall. After the civil construction is completed, the second section will be laid and connected to the inspection well from the outer wall.
Note: When the buried pipe is a cast iron pipe, the outer side of the bottom plastic pipe inserted into its socket should be roughened with sandpaper first. After insertion, fill it evenly with hemp silk and twist the mouth with asbestos cement. Cement mortar shall not be used. Care should be taken to prevent the plastic pipe from deforming during operation.
2. According to the position of the pipeline on the design drawing, determine the elevation and lay out the line. After verification, dig the trench to the designed depth.
3. Check and smooth the reserved holes.
4. Measure according to the position of each water inlet and the direction of the pipeline, draw a small sample drawing of the actual measurement and indicate the size in detail.
5. Select qualified pipes and pipe fittings according to the small sample drawing of the actual measurement, and carry out piping and prefabrication.
Sixth, the trench of the ground pipeline should have a flat bottom surface without protruding sharp objects. Generally, a 100~150mm sand cushion layer can be made. The width of the cushion layer should not be less than 2.5 times the diameter of the pipe, and the slope should be the same as the slope of the pipe. It must be filled with fine soil or sand to at least 100mm above the top of the pipe.
Seventh, after the pipeline is installed and verified, a water filling test must be carried out. The water filling height should not be lower than the ground height of the bottom layer. After 15 minutes of full water, if the water level drops, refill it for 5 minutes. It is qualified if the liquid level does not drop. After draining the water, the accumulated water in the water seal of the water trap should be wiped out.
Eighth, after the water filling test, the pipe openings of each water receiving pipe should be closed and the holes should be filled. The backfill soil must be carried out in layers and compacted with a wooden rammer. If mechanical backfilling is used, a layer of manual backfilling should be carried out first, and its thickness should not be less than 300mm from the top of the pipe. IX. The water filling test shall be hosted by the construction unit and relevant personnel shall be invited to participate. After the test is qualified, the concealed project acceptance shall be handled. Article 3.2.2 The installation of floor pipes shall be carried out in accordance with the following procedures: Engineering Construction Standard Full Text Information System
KAONTKAca-
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