Installation and construction method for indoor and outdoor water supply pipelines of multi-story building

Abstract

The invention discloses a multi-story building indoor and outdoor water supply pipeline installation construction method which comprises the steps of construction preparation, living pipeline installation, living drainage pipeline installation, fire-fighting water supply pipe installation, valve installation, pipeline through-wall construction, pipeline support and hanger installation, pipeline pressure testing and pipeline flushing and sanitary ware installation. Wherein the valve installation comprises the steps of installation of a life water supply pipeline valve, installation of a life water outlet pipeline valve and installation of a fire-fighting pipeline valve. The pipeline is stored, installed, measured in pressure and washed in a classified mode, the situation that pipes are installed by mistake during installation is avoided, the installation quality of the pipeline is guaranteed, the metal buried pipeline is subjected to reinforced anti-corrosion treatment, pressure testing and side leakage are conducted before the pipeline is hidden, the problem that leakage is difficult to find in the follow-up process is avoided, the service life of the pipeline is prolonged, and the production cost is reduced. The working efficiency is improved, the construction quality is guaranteed, the construction period is shortened, and popularization is easy.

Description

Technical Field

[0001] The invention relates to a water supply pipeline installation construction method, in particular to an indoor and outdoor water supply pipeline installation construction method for a multi-story building, and belongs to the technical field of pipeline construction. Background Art

[0002] A pipeline is a device connected by tubes, pipe connectors and valves for conveying gas, liquid or fluid with solid particles. Pipes are widely used, mainly in water supply, drainage, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation and various industrial devices. When installing indoor water supply pipelines in multi-story buildings, since the pipelines involve water supply, drainage, fire protection and other aspects, and different pipelines use different pipes and connection methods, it is easy to cause confusion in the use of pipes or incorrect pipe connections during the construction process, which not only increases the burden on the staff, but also poses certain safety hazards. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings, thereby avoiding confusion in the use of pipes or installation errors during the pipeline installation process, improving work efficiency and ensuring construction quality.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A method for installing and constructing indoor and outdoor water supply pipelines in a multi-story building comprises the following steps: S1. Construction preparation ①. According to the construction requirements, reserve holes at the locations where the pipes pass through the wall and clean the areas around the holes; ②. Prepare the pipes and valves required for construction, and store them in categories and zones; S2. Installation of living pipes ① Domestic water supply pipes and risers are made of plastic-lined steel pipes with a pressure of no less than 1.0MPa, and are connected by thread or clamp; ② The cold water pipe and hot water pipe of the indoor water supply branch pipe are made of triple-propylene polypropylene pipe, among which: the cold water pipe is S5 series PP-R pipe, and the warm water pipe is S3.2 series PP-R pipe, and they are connected by hot melt; ③. The indoor main vertical pipe is openly installed, and the indoor pipeline is concealed in the floor leveling layer and the wall, and is concealed along the wall, column, and ring beam. During construction, reserved openings should be made and operating space should be left at the valve; S3. Installation of domestic drainage pipelines ① Use rigid polyvinyl chloride solid wall pipe and connect it by socket bonding or socket rubber sealing; ② Rainwater drainage pipes use UV-resistant pressure-bearing rigid polyvinyl chloride solid wall pipes and are connected by insertion. The sockets should not be coated with adhesive or rubber sealing rings; ③. Expansion joints shall be installed every 4m along the floor height of vertical pipes. When the straight pipe section without converging pipe fittings on horizontal pipes exceeds 2m, expansion joints shall be installed, and the spacing between expansion joints shall not exceed 2m; ④. The elbows and water traps used in the horizontal branch pipes should be equipped with inspection ports, and the horizontal pipes and vertical pipes should be connected by a downstream tee or downstream cross; ⑤. The slope of the domestic drainage horizontal branch pipe is: i=0.026, the slope of the drainage outlet pipe is i=0.012, and each layer of the drainage riser is equipped with an expansion joint; ④. Production wastewater pipe: 304 stainless steel pipe is used below ±0.000 and connected by argon arc welding; industrial grade UPVC pipe is used above ±0.000 and connected by hot melt; S4. Installation of fire water supply pipes ①. Outdoors, drinking water type steel wire skeleton is used to wrap plastic composite pipes, and hot-melt connection or flange connection is used; indoor fire protection pipes are hot-dip galvanized steel pipes, and the buried part: when DN≤50, threaded connection is used, and when DN>50, flange connection is used; ② Brush cold primer oil and hot asphalt on the buried part of the pipeline. For the overhead part of the pipeline: when the hot-dip galvanized steel pipe and seamless steel pipe are DN≤50, use threaded connection; when DN>50, use grooved connectors; S5. Valve installation: ①. Installation of valves for domestic water supply pipelines: When the pipe diameter is ≤DN50mm, use J11 copper stop valve, the valve body and valve core are made of brass, and the nominal pressure is 1.6MPa; when the pipe diameter is greater than DN50mm, use Z41T gate valve, the valve core is made of brass, and the valve body is made of ductile iron; when the pipeline uses PE or PPR pipe, and the nominal diameter is greater than DN50mm, the valve is a gate valve with a copper core or stainless steel copper core, and the valve body is made of ductile iron or cast steel; in the hot water system, when the pipe diameter is ≤DN50, use a full copper stop valve, and use internal thread connection, and when the pipe diameter is greater than DN50, use a gate valve; ②、Fire-fighting pipeline valve installation: When the pipe diameter is ≤50mm, use a full copper stop valve; when the pipe diameter is greater than 50mm, use a wafer-type butterfly valve for connection; when the fire-fighting pipeline passes through the expansion joint, use a metal bellows or compensator; ③. Installation of valves for domestic water outlet pipes: use silencer check valves and connect them with flanges; when space is limited, use wafer-type butterfly valves; the drain pipe valves use elastic base cast iron gate valves, and the automatic exhaust valves are equipped with all-copper stop valves; the pool water inlet control valves use filter piston remote control float valves and connect them with flanges; the adjustable pressure reducing valves, pressure relief valves, and safety valves all use ductile iron valve bodies; S6. Pipeline through wall construction: ① When the pipeline passes through the building, a sleeve should be installed outside the pipeline. The top of the sleeve installed in the floor should be 20mm higher than the decorative floor; the top of the sleeve installed in the bathroom and kitchen should be 50mm higher than the decorative floor, and the bottom of the sleeve should be flush with the floor. The gap between the sleeve and the pipeline should be filled with flame-retardant dense materials and waterproof grease, and the end surface should be smooth; ② Holes should be reserved for drainage pipes passing through the floor slabs. The holes should be tightly compacted after the pipes are installed. A fire-blocking ring 10-20mm higher than the design elevation of the floor slab should be set around the vertical pipes; ③ When the pipeline passes through the expansion joint and settlement joint, the drainage pipe shall use flexible rubber joints, and the fire protection pipe and domestic water supply pipe shall use stainless steel metal hoses; S7. Installation of pipe supports and hangers ①. Pipe supports or pipe clamps should be fixed on the floor or load-bearing structure. When the building height is less than or equal to 4m, a fixed pipe clamp should be installed on each riser, and the installation height should be 1.5m from the ground. When the floor height exceeds 4m, a fixed pipe clamp should be installed every 2m vertical distance. ② When the drainage riser is offset, use a U-shaped pipe or two 45° elbows; ③. Cleaning ports should be set on drainage horizontal pipes with water flow deflection angles greater than 45°; two 45° elbows should be used to connect the vertical pipe and the discharge pipe, and a pier should be set at the bend at the bottom of the vertical pipe; S8. Pipeline pressure test ①. The test pressure of the indoor domestic water supply pipeline system is 1.5 times the working pressure, but not less than 0.6MPa; ②Indoor metal and composite water supply pipe systems are observed under the test pressure for 10 minutes. The pressure drop should not be greater than 0.02MPa. Then the test pressure is reduced to the working pressure and the appearance of the pipe is checked. The pipe is qualified if there is no leakage. ③. The plastic pipe water supply system is maintained at a steady pressure for 1 hour under the test pressure, and the pressure drop shall not exceed 0.05MPa. Then, the pressure is maintained at 1.5 times the working pressure for 2 hours, and the pressure drop shall not exceed 0.03MPa. At the same time, the status of each connection is checked for leakage; ④. For concealed or buried drainage pipes, a water filling test should be conducted before concealment. The water filling height should not be lower than the upper edge of the sanitary ware at the bottom or the ground level at the bottom. The pipes should be filled with water for 15 minutes and observed for 5 minutes. If there is no leakage at the pipe opening, it is qualified. ⑤. After the fire hydrant system is installed, a water pressure test should be carried out. Under the test pressure, the pipe network is qualified if there is no deformation or leakage and the pressure drop is not more than 0.05MPa within 30 minutes of stable pressure. S9. Pipeline Flushing The water supply pipeline should be flushed and disinfected before the system is put into operation, and the flushing flow rate should not be less than 1.5m / s; S10. Installation of sanitary ware ① Sanitary appliances are fixed with embedded bolts or expansion bolts, and all faucets are ceramic sealed faucets; ② After the sanitary appliances are installed, they should be tested for full water and water flow.

[0005] The pipelines are installed from bottom to top, and a pressure test should be carried out before the underground pipelines are concealed.

[0006] Before installing the vertical pipe, the ground elevation should be checked, and the branch pipe installation should be carried out after the wall is plastered.

[0007] The surface is 1 meter.

[0008] When laying water supply pipes, they should be horizontal and vertical, and hot-melt connections should be used at pipe bends or branch connections; when water supply pipes are exposed, they should be firmly fixed; water supply pipes and valves and faucets should be connected by threaded connections.

[0009] When installing the pipeline, pipe clamps should be set according to different pipe diameters and requirements. The position should be accurate, the burial should be flat, the pipe clamps should be in close contact with the pipeline, and the pipeline surface should not be damaged.

[0010] The connection between horizontal pipes and horizontal pipes, and between horizontal pipes and vertical pipes of drainage pipes should be made by using 45° tees or crosses and 90° inclined tees or 90° inclined fours; the ends of the drainage vertical pipe and the horizontal discharge pipe should be connected together by two 45° elbows or 90° elbows with a curvature radius of not less than 4 times the pipe diameter; an inspection port should be set on every other layer of the vertical pipe.

[0011] The underground buried part of the metal pipeline must be strengthened with anti-corrosion treatment, and the thickness of the anti-corrosion layer must be no less than 6mm. The buried part shall be subjected to water pressure test with the test pressure of 0.6Mpa, and it is qualified if there is no leakage or seepage.

[0012] The inlet pipe should be buried below the freezing line. When passing through a load-bearing wall or a reserved hole in the foundation, a gap should be left on the top of the pipe. The amount of the gap must not be less than the maximum settlement of the building. When the inlet pipe passes through the outer wall of the basement, waterproof measures should be taken, and when the water pipe passes through the floor slab, a water retaining barrier should be built.

[0013] The positive beneficial effects of the present invention are: 1. The present invention avoids the use of incorrect pipes during construction by classifying and storing pipes and valves. The pipes are divided into: domestic water supply system, domestic drainage system, domestic wastewater system, and fire water supply pipe system. After each system is installed, pressure measurement and flushing are performed separately, thereby improving work efficiency and ensuring construction quality.

[0014] 2. The present invention strengthens the anti-corrosion treatment of the underground buried part of the metal pipeline, and performs pressure testing and side leakage testing before the pipeline is concealed. If the pipeline is not tightly sealed or leaks, it is immediately repaired or reinstalled to avoid the problem of difficulty in finding leaks later, thereby extending the service life of the pipeline and shortening the construction period. DETAILED DESCRIPTION

[0015] The present invention will be further explained and described below: Embodiment, a method for installing and constructing indoor and outdoor water supply pipelines in a multi-story building, comprising the following steps: S1. Construction preparation ①. According to the construction requirements, reserve holes at the locations where the pipes pass through the wall and clean the areas around the holes; ②. Prepare the pipes and valves required for construction, and store them in categories and zones; S2. Installation of living pipes ① Domestic water supply pipes and risers are made of plastic-lined steel pipes with a pressure of no less than 1.0MPa, and are connected by thread or clamp; ② The cold water pipe and hot water pipe of the indoor water supply branch pipe are made of triple-propylene polypropylene pipe, among which: the cold water pipe is S5 series PP-R pipe, and the warm water pipe is S3.2 series PP-R pipe, and they are connected by hot melt; ③. The indoor main vertical pipe is openly installed, and the indoor pipeline is concealed in the floor leveling layer and the wall, and is concealed along the wall, column, and ring beam. During construction, reserved openings should be made and operating space should be left at the valve; S3. Installation of domestic drainage pipelines ① Use rigid polyvinyl chloride solid wall pipe and connect it by socket bonding or socket rubber sealing; ② Rainwater drainage pipes use UV-resistant pressure-bearing rigid polyvinyl chloride solid wall pipes and are connected by insertion. The sockets should not be coated with adhesive or rubber sealing rings; ③. Expansion joints shall be installed every 4m along the floor height of vertical pipes. When the straight pipe section without converging pipe fittings on horizontal pipes exceeds 2m, expansion joints shall be installed, and the spacing between expansion joints shall not exceed 2m; ④. The elbows and water traps used in the horizontal branch pipes should be equipped with inspection ports, and the horizontal pipes and vertical pipes should be connected by a downstream tee or downstream cross; ⑤. The slope of the domestic drainage horizontal branch pipe is: i=0.026, the slope of the drainage outlet pipe is i=0.012, and each layer of the drainage riser is equipped with an expansion joint; ④. Production wastewater pipe: 304 stainless steel pipe is used below ±0.000 and connected by argon arc welding; industrial grade UPVC pipe is used above ±0.000 and connected by hot melt; S4. Installation of fire water supply pipes ①. Outdoors, drinking water type steel wire skeleton is used to wrap plastic composite pipes, and hot-melt connection or flange connection is used; indoor fire protection pipes are hot-dip galvanized steel pipes, and the buried part: when DN≤50, threaded connection is used, and when DN>50, flange connection is used; ② Brush cold primer oil and hot asphalt on the buried part of the pipeline. For the overhead part of the pipeline: when the hot-dip galvanized steel pipe and seamless steel pipe are DN≤50, use threaded connection; when DN>50, use grooved connectors; S5. Valve installation: ①. Installation of valves for domestic water supply pipelines: When the pipe diameter is ≤DN50mm, use J11 copper stop valve, the valve body and valve core are made of brass, and the nominal pressure is 1.6MPa; when the pipe diameter is greater than DN50mm, use Z41T gate valve, the valve core is made of brass, and the valve body is made of ductile iron; when the pipeline uses PE or PPR pipe, and the nominal diameter is greater than DN50mm, the valve is a gate valve with a copper core or stainless steel copper core, and the valve body is made of ductile iron or cast steel; in the hot water system, when the pipe diameter is ≤DN50, use a full copper stop valve, and use internal thread connection, and when the pipe diameter is greater than DN50, use a gate valve; ②、Fire-fighting pipeline valve installation: When the pipe diameter is ≤50mm, use a full copper stop valve; when the pipe diameter is greater than 50mm, use a wafer-type butterfly valve for connection; when the fire-fighting pipeline passes through the expansion joint, use a metal bellows or compensator; ③. Installation of valves for domestic water outlet pipes: use silencer check valves and connect them with flanges; when space is limited, use wafer-type butterfly valves; the drain pipe valves use elastic base cast iron gate valves, and the automatic exhaust valves are equipped with all-copper stop valves; the pool water inlet control valves use filter piston remote control float valves and connect them with flanges; the adjustable pressure reducing valves, pressure relief valves, and safety valves all use ductile iron valve bodies; S6. Pipeline through wall construction: ① When the pipeline passes through the building, a sleeve should be installed outside the pipeline. The top of the sleeve installed in the floor should be 20mm higher than the decorative floor; the top of the sleeve installed in the bathroom and kitchen should be 50mm higher than the decorative floor, and the bottom of the sleeve should be flush with the floor. The gap between the sleeve and the pipeline should be filled with flame-retardant dense materials and waterproof grease, and the end surface should be smooth; ② Holes should be reserved for drainage pipes passing through the floor slabs. The holes should be tightly compacted after the pipes are installed. A fire-blocking ring 10-20mm higher than the design elevation of the floor slab should be set around the vertical pipes; ③ When the pipeline passes through the expansion joint and settlement joint, the drainage pipe shall use flexible rubber joints, and the fire protection pipe and domestic water supply pipe shall use stainless steel metal hoses; S7. Installation of pipe supports and hangers ①. Pipe supports or pipe clamps should be fixed on the floor or load-bearing structure. When the building height is less than or equal to 4m, a fixed pipe clamp should be installed on each riser, and the installation height should be 1.5m from the ground. When the floor height exceeds 4m, a fixed pipe clamp should be installed every 2m vertical distance. ② When the drainage riser is offset, use a U-shaped pipe or two 45° elbows; ③. Cleaning ports should be set on drainage horizontal pipes with water flow deflection angles greater than 45°; two 45° elbows should be used to connect the vertical pipe and the discharge pipe, and a pier should be set at the bend at the bottom of the vertical pipe; S8. Pipeline pressure test ①. The test pressure of the indoor domestic water supply pipeline system is 1.5 times the working pressure, but not less than 0.6MPa; ②Indoor metal and composite water supply pipe systems are observed under the test pressure for 10 minutes. The pressure drop should not be greater than 0.02MPa. Then the test pressure is reduced to the working pressure and the appearance of the pipe is checked. The pipe is qualified if there is no leakage. ③. The plastic pipe water supply system is maintained at a steady pressure for 1 hour under the test pressure, and the pressure drop shall not exceed 0.05MPa. Then, the pressure is maintained at 1.5 times the working pressure for 2 hours, and the pressure drop shall not exceed 0.03MPa. At the same time, the status of each connection is checked for leakage; ④. For concealed or buried drainage pipes, a water filling test should be conducted before concealment. The water filling height should not be lower than the upper edge of the sanitary ware at the bottom or the ground level at the bottom. The pipes should be filled with water for 15 minutes and observed for 5 minutes. If there is no leakage at the pipe opening, it is qualified. ⑤. After the fire hydrant system is installed, a water pressure test should be carried out. Under the test pressure, the pipe network is qualified if there is no deformation or leakage and the pressure drop is not more than 0.05MPa within 30 minutes of stable pressure. S9. Pipeline Flushing The water supply pipeline should be flushed and disinfected before the system is put into operation, and the flushing flow rate should not be less than 1.5m / s; S10. Installation of sanitary ware ① Sanitary appliances are fixed with embedded bolts or expansion bolts, and all faucets are ceramic sealed faucets; ② After the sanitary appliances are installed, they should be tested for full water and water flow.

[0016] The pipelines are installed from bottom to top, and a pressure test should be carried out before the underground pipelines are concealed.

[0017] Before installing the vertical pipe, the ground elevation should be checked, and the branch pipe installation should be carried out after the wall is plastered.

[0018] When there is an U-shaped pipe in the vertical pipe of the drainage pipe, an inspection port should be set at the upper part of the U-shaped pipe, and the center of the inspection port should be 1 meter away from the floor.

[0019] When laying water supply pipes, they should be horizontal and vertical, and hot-melt connections should be used at pipe bends or branch connections; when water supply pipes are exposed, they should be firmly fixed; water supply pipes and valves and faucets should be connected by threaded connections.

[0020] When installing the pipeline, pipe clamps should be set according to different pipe diameters and requirements. The position should be accurate, the burial should be flat, the pipe clamps should be in close contact with the pipeline, and the pipeline surface should not be damaged.

[0021] The connection between horizontal pipes and horizontal pipes, and between horizontal pipes and vertical pipes of drainage pipes should be made by using 45° tees or crosses and 90° inclined tees or 90° inclined fours; the ends of the drainage vertical pipe and the horizontal discharge pipe should be connected together by two 45° elbows or 90° elbows with a curvature radius of not less than 4 times the pipe diameter; an inspection port should be set on every other layer of the vertical pipe.

[0022] The underground buried part of the metal pipeline must be strengthened with anti-corrosion treatment, and the thickness of the anti-corrosion layer must be no less than 6mm. The buried part shall be subjected to water pressure test with the test pressure of 0.6Mpa, and it is qualified if there is no leakage or seepage.

[0023] The inlet pipe should be buried below the freezing line. When passing through a load-bearing wall or a reserved hole in the foundation, a gap should be left on the top of the pipe. The amount of the gap must not be less than the maximum settlement of the building. When the inlet pipe passes through the outer wall of the basement, waterproof measures should be taken, and when the water pipe passes through the floor slab, a water retaining barrier should be built.

[0024] In the above description, the underground buried part of the metal pipeline must strengthen the anti-corrosion treatment, and the thickness of the anti-corrosion layer shall not be less than 6mm. The buried part shall be subjected to water pressure test, and the test pressure shall be 0.6Mpa. The result is that it is qualified if it is leak-proof. The water supply pipe shall be laid horizontally and vertically, and hot-melt connection shall be adopted at the pipe bends or branch pipe connections. It shall be firmly fixed and pay attention to aesthetics when exposed. The connection between the water supply pipe and valves, faucets and other components shall be threaded. When installing the pipeline, pipe clamps must be set according to different pipe diameters and requirements. The position shall be accurate and the burial shall be flat. The pipe clamps shall be in close contact with the pipeline, but the surface of the pipeline shall not be damaged. Among them: the steps for connecting pipes and fittings are as follows: when cutting the pipe, the end face must be perpendicular to the pipe axis. Pipe shears and pipe cutting machines are generally used for pipe cutting. Sharp steel knives are used when necessary, but the burrs and burrs of the pipe section shall be removed after cutting. The connecting end faces of the pipe and the fittings must be clean, dry and oil-free. Hot-melt connection is used for connection.

[0025] In the above description, the installation direction of the water supply pipe stop valve is low in and high out, and the flexible joint is installed, and the end with the spigot should be installed on the end of the water inlet pipe.

[0026] In the above description, when there is an I-shaped pipe on the vertical pipe, an inspection port should be set on the upper part of the I-shaped pipe. The center of the inspection port is 1 meter away from the floor, and its direction should be convenient for inspection; a cleaning port should be set on the sewage horizontal pipe connecting 2 or more toilets or 3 or more sanitary appliances; if a plug is set at the starting point of the sewage pipe instead of the cleaning port, the distance from the wall shall not be less than 400mm; the water seal depth of the water seal floor drain shall not be less than 50mm, and the top surface of the grate shall be 5-10mm lower than the ground; the socket shall use adhesive, and the adhesive should be applied evenly within the range of the socket to avoid water seepage.

[0027] In the above description, when the drainage pipe passes through the reserved hole in the foundation, the clearance above the pipe top shall not be less than the settlement of the building, and generally should not be less than 0.15 meters; a water retaining sill should be made at the root of the drainage pipe, in the same way as the water supply pipe. During construction, the reserved holes in the cast-in-place floor slab should be 50-100mm larger than the outer diameter of the pipe passing through; to prevent pipe blockage, the drainage pipe out of the building should be one pipe diameter larger than the vertical pipe, and the height of the drainage ventilation pipe out of the roof should not be less than 700mm; the drainage ventilation pipe should extend out of the roof by no less than 700mm, and a casing should be added.

[0028] The present invention stores pipes and valves by categories to avoid the use of wrong pipes during construction, ensures the installation quality of pipes by installing, pressure testing and flushing the pipes by categories, strengthens the anti-corrosion treatment of the underground buried parts of metal pipes and performs pressure testing and side leakage testing before the pipes are concealed to avoid the subsequent problems of difficult detection or leak finding, thereby extending the service life of the pipes, improving work efficiency, ensuring construction quality, shortening the construction period, and being easy to promote.

Claims

1. A method for installing and constructing indoor and outdoor water supply pipelines in a multi-story building, characterized in that: The steps include: S1. Construction preparation ①. According to the construction requirements, reserve holes at the locations where the pipes pass through the wall and clean the areas around the holes; ②. Prepare the pipes and valves required for construction, and store them in categories and zones; S2. Installation of living pipes ① Domestic water supply pipes and risers are made of plastic-lined steel pipes with a pressure of no less than 1.0MPa and are connected by thread or clamps; ② The cold water pipe and hot water pipe of the indoor water supply branch pipe are made of triple-propylene polypropylene pipe, among which: the cold water pipe is S5 series PP-R pipe, and the warm water pipe is S3.2 series PP-R pipe, and they are connected by hot melt; ③. The indoor main vertical pipe is openly installed, and the indoor pipeline is concealed in the floor leveling layer and the wall, and is concealed along the wall, column, and ring beam. During construction, reserved openings should be made and operating space should be left at the valve; S3. Installation of domestic drainage pipelines ① Use rigid polyvinyl chloride solid wall pipe and connect it by socket bonding or socket rubber sealing; ② Rainwater drainage pipes use UV-resistant pressure-bearing rigid polyvinyl chloride solid wall pipes and are connected by insertion. The sockets should not be coated with adhesive or rubber sealing rings; ③. Expansion joints shall be installed every 4m along the floor height of vertical pipes. When the straight pipe section without converging pipe fittings on horizontal pipes exceeds 2m, expansion joints shall be installed, and the spacing between expansion joints shall not exceed 2m; ④. The elbows and water traps used in the horizontal branch pipes should be equipped with inspection ports, and the horizontal pipes and vertical pipes should be connected by a downstream tee or downstream cross; ⑤. The slope of the domestic drainage horizontal branch pipe is: i=0.026, the slope of the drainage outlet pipe is i=0.012, and each layer of the drainage riser is equipped with an expansion joint; ④. Production wastewater pipe: 304 stainless steel pipe is used below ±0.000 and connected by argon arc welding; industrial grade UPVC pipe is used above ±0.000 and connected by hot melt; S4. Installation of fire water supply pipes ①. Outdoors, drinking water type steel wire skeleton is used to wrap plastic composite pipes, and hot-melt connection or flange connection is used; indoor fire protection pipes are hot-dip galvanized steel pipes, and the buried part: when DN≤50, threaded connection is used, and when DN>50, flange connection is used; ② Brush cold primer oil and hot asphalt on the buried part of the pipeline. For the overhead part of the pipeline: when the hot-dip galvanized steel pipe and seamless steel pipe are DN≤50, use threaded connection; when DN>50, use grooved connectors; S5. Valve installation: ①. Installation of valves for domestic water supply pipelines: When the pipe diameter is ≤DN50mm, use J11 copper stop valve, the valve body and valve core are made of brass, and the nominal pressure is 1.6MPa; when the pipe diameter is greater than DN50mm, use Z41T gate valve, the valve core is made of brass, and the valve body is made of ductile iron; when the pipeline uses PE or PPR pipe, and the nominal diameter is greater than DN50mm, the valve is a gate valve with a copper core or stainless steel copper core, and the valve body is made of ductile iron or cast steel; in the hot water system, when the pipe diameter is ≤DN50, use a full copper stop valve, and use internal thread connection, and when the pipe diameter is greater than DN50, use a gate valve; ②、Fire-fighting pipeline valve installation: When the pipe diameter is ≤50mm, use a full copper stop valve; when the pipe diameter is greater than 50mm, use a wafer-type butterfly valve for connection; when the fire-fighting pipeline passes through the expansion joint, use a metal bellows or compensator; ③. Installation of valves for domestic water outlet pipes: use silencer check valves and connect them with flanges; when space is limited, use wafer-type butterfly valves; the drain pipe valves use elastic base cast iron gate valves, and the automatic exhaust valves are equipped with all-copper stop valves; the pool water inlet control valves use filter piston remote control float valves and connect them with flanges; the adjustable pressure reducing valves, pressure relief valves, and safety valves all use ductile iron valve bodies; S6. Pipeline through wall construction: ① When the pipeline passes through the building, a sleeve should be installed outside the pipeline. The top of the sleeve installed in the floor should be 20mm higher than the decorative floor; the top of the sleeve installed in the bathroom and kitchen should be 50mm higher than the decorative floor, and the bottom of the sleeve should be flush with the floor. The gap between the sleeve and the pipeline should be filled with flame-retardant dense materials and waterproof grease, and the end surface should be smooth; ② Holes should be reserved for drainage pipes passing through the floor slabs. The holes should be tightly compacted after the pipes are installed. A fire-blocking ring 10-20mm higher than the design elevation of the floor slab should be set around the vertical pipes; ③ When the pipeline passes through the expansion joint and settlement joint, the drainage pipe shall use flexible rubber joints, and the fire protection pipe and domestic water supply pipe shall use stainless steel metal hoses; S7. Installation of pipe supports and hangers ①. Pipe supports or pipe clamps should be fixed on the floor or load-bearing structure. When the building height is less than or equal to 4m, a fixed pipe clamp should be installed on each riser, and the installation height should be 1.5m from the ground. When the floor height exceeds 4m, a fixed pipe clamp should be installed every 2m vertical distance. ② When the drainage riser is offset, use a U-shaped pipe or two 45° elbows; ③. Cleaning ports should be set on drainage horizontal pipes with water flow deflection angles greater than 45°; two 45° elbows should be used to connect the vertical pipe and the discharge pipe, and a pier should be set at the bend at the bottom of the vertical pipe; S8. Pipeline pressure test ①. The test pressure of the indoor domestic water supply pipeline system is 1.5 times the working pressure, but not less than 0.6MPa; ②Indoor metal and composite water supply pipe systems are observed under the test pressure for 10 minutes. The pressure drop should not be greater than 0.02MPa. Then the test pressure is reduced to the working pressure and the appearance of the pipe is checked. The pipe is qualified if there is no leakage. ③. The plastic pipe water supply system is maintained at a steady pressure for 1 hour under the test pressure, and the pressure drop shall not exceed 0.05MPa. Then, the pressure is maintained at 1.5 times the working pressure for 2 hours, and the pressure drop shall not exceed 0.03MPa. At the same time, the status of each connection is checked for leakage; ④. For concealed or buried drainage pipes, a water filling test should be conducted before concealment. The water filling height should not be lower than the upper edge of the sanitary ware at the bottom or the ground level at the bottom. The pipes should be filled with water for 15 minutes and observed for 5 minutes. If there is no leakage at the pipe opening, it is qualified. ⑤. After the fire hydrant system is installed, a water pressure test should be carried out. Under the test pressure, the pipe network is qualified if there is no deformation or leakage and the pressure drop is not more than 0.05MPa within 30 minutes of stable pressure. S9. Pipeline Flushing The water supply pipeline should be flushed and disinfected before the system is put into operation, and the flushing flow rate should not be less than 1.5m / s; S6. Installation of sanitary appliances ① Sanitary appliances are fixed with embedded bolts or expansion bolts, and all faucets are ceramic sealed faucets; ② After the sanitary appliances are installed, they should be tested for full water and water flow.

2. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: The pipelines are installed from bottom to top, and a pressure test should be carried out before the underground pipelines are concealed.

3. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: Before installing the vertical pipe, the ground elevation should be checked, and the branch pipe installation should be carried out after the wall is plastered.

4. The method for installing and constructing indoor and outdoor water supply pipelines in a multi-story building according to claim 1, characterized in that: When there is an U-shaped pipe in the vertical pipe of the drainage pipe, an inspection port should be set at the upper part of the U-shaped pipe, and the center of the inspection port should be 1 meter away from the floor.

5. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: When laying water supply pipes, they should be horizontal and vertical, and hot-melt connections should be used at pipe bends or branch connections; when water supply pipes are exposed, they should be firmly fixed; water supply pipes and valves and faucets should be connected by threaded connections.

6. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: When installing the pipeline, pipe clamps should be set according to different pipe diameters and requirements. The position should be accurate, the burial should be flat, the pipe clamps should be in close contact with the pipeline, and the pipeline surface should not be damaged.

7. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: The connection between horizontal pipes and horizontal pipes, and between horizontal pipes and vertical pipes of drainage pipes should be made by using 45° tees or crosses and 90° inclined tees or 90° inclined fours; the ends of the drainage vertical pipe and the horizontal discharge pipe should be connected together by two 45° elbows or 90° elbows with a curvature radius of not less than 4 times the pipe diameter; an inspection port should be set on every other layer of the vertical pipe.

8. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: The underground buried part of the metal pipeline must be strengthened with anti-corrosion treatment, and the thickness of the anti-corrosion layer must be no less than 6mm. The buried part shall be subjected to water pressure test with the test pressure of 0.6Mpa, and it is qualified if there is no leakage or seepage.

9. The method for installing and constructing indoor and outdoor water supply pipelines in multi-story buildings according to claim 1, characterized in that: The inlet pipe should be buried below the freezing line. When passing through a load-bearing wall or a reserved hole in the foundation, a gap should be left on the top of the pipe. The amount of the gap must not be less than the maximum settlement of the building. When the inlet pipe passes through the outer wall of the basement, waterproof measures should be taken, and when the water pipe passes through the floor slab, a water retaining barrier should be built.