Use hot water not higher than 60°C as the heat medium and radiate the heating tube in the floor at low temperature for radiant heating. In Europe and the United States and other developed countries as early as the 1970s has been widely used, Korea, Japan and other countries have occupied more than 80% of the area of ​​heating, it has incomparable advantages with traditional heating methods. In the engineering design and construction, we must be technologically advanced, economically reasonable, safe to apply, and ensure quality.
1, comfort, hygiene, health care, improve the quality of life. Radiant floor heating, indoor surface temperature is uniform, the room temperature gradually decreases from the bottom up, giving people a comfortable feeling of cold feet and head, in line with human physiological requirements, because there is no convective air, not easy to spread dust, indoor air is very clean, hot From the feet, improve blood circulation, promote the body's metabolism has a good health care function.
2. High-efficiency and energy-saving, and expanding energy use not only protects the environment, but also reduces the cost. In the radiant heating environment, the heat is effectively concentrated in the human activity area, the heat loss is small, the design temperature is 2°C-4°C lower than the radiator heating design temperature, and the required heating medium temperature is 20°C-30°C lower than the traditional heating method. . In addition to the full use of geothermal energy, waste heat and other energy, it also reduces the loss of heating energy, which can save about 30% of energy.
3, good thermal stability. Since the ground layer and the concrete layer have large heat storage and good thermal stability, under intermittent heating conditions, the indoor temperature changes slowly.
4, improve indoor floor utilization, easy to interior decoration. Indoors due to the elimination of radiators and their pipes, which is equivalent to an increase of 2% -3% of the use of the area, more convenient decoration and room layout, saving the decoration costs.
5, floor heating safe, reliable, low cost, long life. PE-X pipe is recognized by the world as a material that can be continuously used for more than 50 years. At present, the floor heating floor price is lower than the high-middle-range radiator heating cost, because the whole root system is laid without hidden dangers, and no regular maintenance is required.
6, can achieve "measured by household, sub-room thermostat." The temperature in each room can be adjusted and controlled independently, and installing a heat meter before each water separator can realize individual metering and charging.
7, a wide range of applications. Applicable to all types of houses, villas, hotels, restaurants, theaters, stations, swimming pools, office buildings, exhibition halls, libraries, shopping malls, shopping centers, airport runways, car parking, outdoor playgrounds, ramps, melting snow, Aquaculture, planting greenhouses.
Cross-linked Polyethylene (PE-Xa, b) Series Pipes Brief Description Cross-linked Polyethylene (PE-X) Pipes The main raw material used for the production of high-density polyethylene (HDPE) and compound formulations cross-linked excipients, using a screw or plunger Machine extrusion molding pipe, according to cross-linking process can be divided into: peroxide crosslinking method (PE-Xa), silane crosslinking method (PE-Xb), electron beam crosslinking method (PE-Xc), azo Joint law (PE-Xd) four.
PE-Xa, b pipe is based on polyethylene as the main raw material, through the cross-linking method to form chemical covalent bonds between the polyethylene molecular chains, so that the molecules constitute a three-dimensional three-dimensional network structure, so that it has excellent heat resistance and synthesis Mechanical and physical properties have become the materials of choice for indoor and outdoor construction, cold and hot water supply, and floor heating systems. Considered as a new generation of green pipe, it is currently the most economical and most widely used pipe in floor heating projects in northern China. PE-Xa uses South Korean technology, processes, raw materials processing and manufacturing; PE-Xb pipe production technology, process all use German standards, the main raw materials used in all British real estate materials.
PE-Xa, b pipe characteristics and advantages 1, the wide temperature range, long-term use up to 50 years.
2, solid texture and toughness and high internal pressure resistance.
3, chemical resistance, corrosion resistance and ring stress cracking performance, can transport a variety of chemical fluids at high temperatures.
4. The surface tension of the inner wall of the pipe is low, making it difficult for water with a higher surface tension to infiltrate the inner wall, which can effectively prevent the formation of scale.
5, no toxicity, no mildew, no bacteria, health performance in line with the provisions of GB/T 17219-1998.
6. The inner wall of the pipe is smooth, the fluid flow resistance is small, and the hydraulic performance is excellent. Under the same pipe diameter, the flow of the transfer fluid is larger than the metal pipe, and the noise is also low.
7. The bending performance is good, and the wrong bending during the installation process can be corrected by the hot air gun.
8, light weight, easy to install, easy to transport, construction operations save time and effort.
PE-Xa, b pipe applications (1) construction of hot and cold water systems.
(2) Air conditioning hot and cold water, water treatment pipeline system (3) Civil residential central heating system.
(4) Radiant floor heating and snow melting systems in airports and urban traffic.
Technical requirements for PE-Xa, b pipe 1, implementation of standards: GB/T 18992.1-2003 GB/T 18992.2-2003 "cross-linked polyethylene (PE-X) pipe system for hot and cold water."
2, appearance:
1) The inside and outside surfaces of the pipe should be smooth, flat and clean. There should be no obvious scratches, dents, bubbles or other defects that may affect the product performance.
2) The pipe wall should have no visible impurities, and the surface color of the pipe should be uniform and no significant color difference is allowed.
3) The end face of the pipe is cut flat and perpendicular to the axis of the pipe.
3, length:
Coil: φ16～φ32 length is 60～300m Straight pipe: φ16～φ63 length is 4～6m
Note: Larger batches can be produced according to customer needs.
Technical parameters of radiant heating for PE-Xa, b and PE-RT pipes 1. Structural layer thickness: 90mm for public buildings and 70mm for residential buildings.
2, heat medium temperature: ≤ 65 °C
3, temperature difference of water supply: 8 ≤ 15 °C.
4, working pressure: ≤ 0.8MPa.
5. When the structural layer bears loads of ≥2000kg/m2, corresponding measures shall be taken.
6. Install a filter on the water supply pipe to prevent foreign matter from entering the pipe.
7, heating and ground heating materials, supply water temperature, pipe spacing, interior design temperature and other factors, the conventional practice, the pipe spacing 100mm-350mm, insulation material for the 15-30mm composite polystyrene board, the average water temperature 35-55 °C, room temperature 15-28 °C.
PE-Xa, b and PE-RT Pipe Construction and Installation I. Pre-construction Preparation 1. Organize the construction personnel to be familiar with the construction plan and design description of the project, as well as relevant specifications, regulations and master the necessary construction process.
2. The used equipment and related equipment should be ready to ensure normal construction.
3, the construction site should be flat and clean, do not allow bumps, and sand and other debris, the interface should be smooth and smooth, no obvious elevation deviation.
4. Temporary facilities such as construction electricity, water and material storage sites can meet construction requirements.
Second, the construction sequence (1) Check and confirm that the concealment works within the construction site area have been completed.
(2) Clean up the laying of PE-Xa, b and PE-RT pipe system sites.
(3) laying a composite insulation layer.
(4) Laying PE-Xa, b and PE-RT pipes and laying them according to the design cycle.
(5) The dispenser is positioned and installed.
(6) PE-Xa, b and PE-RT tube pressure test.
(7) laying steel mesh (responsible by Party A)
(8) PE-Xa, b and PE-RT pipes with pressure (0.4MPa) filled with bean-cement concrete. (responsible by Party A)
Third, the construction quality requirements (1) Construction and installation in addition to the implementation of the project floor heating design basis should also be in line with "heating and sanitation engineering construction and acceptance specifications" (GBJ242-82) and related specifications.
(2) When laying PE-Xa, b, and PE-RT pipes, avoid crossover operations on the same work surface with other constructions.
(3) Before installing the PE-Xa, b, and PE-RT tubes, carefully check the fitting tolerances of the appearance joints and remove dirt and foreign matter inside and outside the tubes and fittings.
(4) The PE-Xa, b and PE-RT pipes shall be laid in accordance with the design drawings and shall be laid in such a way as to avoid errors. PE-Xa, b and PE-RT pipes in the buried parts may not have joints.
(5) During the installation, paint, asphalt and other contaminants shall be prevented from coming into contact with the pipe copper fittings.
(6) PE-Xa, b and PE-RT pipe supply and return pipelines, after the completion of the construction of the distributor flushing pressure test, confirm that the pipeline distributor is clean, can be connected, PE-Xa, b and PE-RT tube Filters must be installed on the water supply and checked regularly every year.
(7) In the heating floor structure, the polystyrene insulation layer has reached the heat insulation purpose when its thickness is 20 mm, and it can prevent the heat conduction between the house and the room from having another sound insulation effect. Pebble concrete can fix PE-Xa, b and PE-RT pipes, increase ground strength, and provide better heat transfer.
(8) If the load on the ground floor is greater than 2 tons/m2, install a reinforcement mesh in the upper part of the floor heating floor, place it 10-20mm above the PE-Xa, b and PE-RT pipe skins, and the mesh diameter φ2-φ4mm. , Network distance 150mm.
(9) In order to ensure the thickness requirements of the design of the bean-cement concrete layer and prevent the overall temperature of the floor layer from being affected, the strength of the bean-cement concrete shall not be lower than C20, and the particle size of the bean-pearl shall not be greater than 8mm, and at the same time, cracks shall be added to the bean-cement concrete. Additives to enhance the compressive strength of the bean-concrete layer and prevent thermal cracking, aging, winter construction must add condensing agent.
(10) The distance between the installation of plastic staples is 0.5 m/pipe, the turn is 0.25 m/set, and the turning radius is >8D.
(11) People entering the construction site should wear soft-soled shoes, and no shoes or iron-clad shoes are allowed on the site. Other iron tools are strictly prohibited except for special construction tools. During the construction process, workers should exercise care and save the tools properly to prevent Pipe damage.
Fourth, the pipeline pressure test 1, the pipeline filled with water, air tightness inspection.
2, according to the design work pressure of 1.5 times the test, after the pressure is stopped, the pressure drop within 15 minutes does not exceed 0.05Mpa, and no air leakage as qualified.
V. Quality Acceptance 1. The intermediate acceptance shall be carried out after the installation of PE-Xa, b and PE-RT pipe laying and distributors are completed, and the pressure test shall be conducted again after the curing period of the concrete filling layer is over. The construction unit shall also cooperate with the supervision unit. .
2. Overall acceptance of the overall acceptance conditions:
(1) Construction drawings, as-built drawings and design change documents.
(2) Factory certificate of main materials, parts, products and equipment.
(3) Intermediate acceptance records and engineering quality accident records.
(4) Hydraulic pressure test records and hidden project records.
(5) Ground buried records.
Sixth, system debugging 1, system debugging should be carried out after the middle acceptance and overall acceptance.
2. Before commissioning, the pipeline system should be checked and flushed firstly. Measures should be taken during the flushing process to prevent foreign matter from entering the system, and at the same time, debug the hydraulic balance of the system's water supply pipeline.
3, to the low-temperature floor heating system radiant water supply, water temperature gradually increased from 30 degrees to 55 degrees, does not allow a short period of sudden temperature rise.
4. Commission and check the temperature control system of heating and heating media to ensure that the low-temperature floor radiation heating system works within the allowable range of the design. The maximum water supply temperature must not exceed 60 degrees.
5. The low temperature floor heating system is full of water conservation during the non-heat season.
6, low temperature floor heating system allows the use of pressure P ≤ 0.6Mpa.
Seventh, finished product protection requirements 1, the completion of the construction of the heating floor is strictly prohibited strong tapping, impact; is strictly prohibited on the ground or roof, drilling, opening holes, shot nails and other endanger the safety of heating pipe operations.
2. In order to prevent the frosted floor heating system from being frozen, it is forbidden to have water in the non-heating system.
1, comfort, hygiene, health care, improve the quality of life. Radiant floor heating, indoor surface temperature is uniform, the room temperature gradually decreases from the bottom up, giving people a comfortable feeling of cold feet and head, in line with human physiological requirements, because there is no convective air, not easy to spread dust, indoor air is very clean, hot From the feet, improve blood circulation, promote the body's metabolism has a good health care function.
2. High-efficiency and energy-saving, and expanding energy use not only protects the environment, but also reduces the cost. In the radiant heating environment, the heat is effectively concentrated in the human activity area, the heat loss is small, the design temperature is 2°C-4°C lower than the radiator heating design temperature, and the required heating medium temperature is 20°C-30°C lower than the traditional heating method. . In addition to the full use of geothermal energy, waste heat and other energy, it also reduces the loss of heating energy, which can save about 30% of energy.
3, good thermal stability. Since the ground layer and the concrete layer have large heat storage and good thermal stability, under intermittent heating conditions, the indoor temperature changes slowly.
4, improve indoor floor utilization, easy to interior decoration. Indoors due to the elimination of radiators and their pipes, which is equivalent to an increase of 2% -3% of the use of the area, more convenient decoration and room layout, saving the decoration costs.
5, floor heating safe, reliable, low cost, long life. PE-X pipe is recognized by the world as a material that can be continuously used for more than 50 years. At present, the floor heating floor price is lower than the high-middle-range radiator heating cost, because the whole root system is laid without hidden dangers, and no regular maintenance is required.
6, can achieve "measured by household, sub-room thermostat." The temperature in each room can be adjusted and controlled independently, and installing a heat meter before each water separator can realize individual metering and charging.
7, a wide range of applications. Applicable to all types of houses, villas, hotels, restaurants, theaters, stations, swimming pools, office buildings, exhibition halls, libraries, shopping malls, shopping centers, airport runways, car parking, outdoor playgrounds, ramps, melting snow, Aquaculture, planting greenhouses.
Cross-linked Polyethylene (PE-Xa, b) Series Pipes Brief Description Cross-linked Polyethylene (PE-X) Pipes The main raw material used for the production of high-density polyethylene (HDPE) and compound formulations cross-linked excipients, using a screw or plunger Machine extrusion molding pipe, according to cross-linking process can be divided into: peroxide crosslinking method (PE-Xa), silane crosslinking method (PE-Xb), electron beam crosslinking method (PE-Xc), azo Joint law (PE-Xd) four.
PE-Xa, b pipe is based on polyethylene as the main raw material, through the cross-linking method to form chemical covalent bonds between the polyethylene molecular chains, so that the molecules constitute a three-dimensional three-dimensional network structure, so that it has excellent heat resistance and synthesis Mechanical and physical properties have become the materials of choice for indoor and outdoor construction, cold and hot water supply, and floor heating systems. Considered as a new generation of green pipe, it is currently the most economical and most widely used pipe in floor heating projects in northern China. PE-Xa uses South Korean technology, processes, raw materials processing and manufacturing; PE-Xb pipe production technology, process all use German standards, the main raw materials used in all British real estate materials.
PE-Xa, b pipe characteristics and advantages 1, the wide temperature range, long-term use up to 50 years.
2, solid texture and toughness and high internal pressure resistance.
3, chemical resistance, corrosion resistance and ring stress cracking performance, can transport a variety of chemical fluids at high temperatures.
4. The surface tension of the inner wall of the pipe is low, making it difficult for water with a higher surface tension to infiltrate the inner wall, which can effectively prevent the formation of scale.
5, no toxicity, no mildew, no bacteria, health performance in line with the provisions of GB/T 17219-1998.
6. The inner wall of the pipe is smooth, the fluid flow resistance is small, and the hydraulic performance is excellent. Under the same pipe diameter, the flow of the transfer fluid is larger than the metal pipe, and the noise is also low.
7. The bending performance is good, and the wrong bending during the installation process can be corrected by the hot air gun.
8, light weight, easy to install, easy to transport, construction operations save time and effort.
PE-Xa, b pipe applications (1) construction of hot and cold water systems.
(2) Air conditioning hot and cold water, water treatment pipeline system (3) Civil residential central heating system.
(4) Radiant floor heating and snow melting systems in airports and urban traffic.
Technical requirements for PE-Xa, b pipe 1, implementation of standards: GB/T 18992.1-2003 GB/T 18992.2-2003 "cross-linked polyethylene (PE-X) pipe system for hot and cold water."
2, appearance:
1) The inside and outside surfaces of the pipe should be smooth, flat and clean. There should be no obvious scratches, dents, bubbles or other defects that may affect the product performance.
2) The pipe wall should have no visible impurities, and the surface color of the pipe should be uniform and no significant color difference is allowed.
3) The end face of the pipe is cut flat and perpendicular to the axis of the pipe.
3, length:
Coil: φ16～φ32 length is 60～300m Straight pipe: φ16～φ63 length is 4～6m
Note: Larger batches can be produced according to customer needs.
Technical parameters of radiant heating for PE-Xa, b and PE-RT pipes 1. Structural layer thickness: 90mm for public buildings and 70mm for residential buildings.
2, heat medium temperature: ≤ 65 °C
3, temperature difference of water supply: 8 ≤ 15 °C.
4, working pressure: ≤ 0.8MPa.
5. When the structural layer bears loads of ≥2000kg/m2, corresponding measures shall be taken.
6. Install a filter on the water supply pipe to prevent foreign matter from entering the pipe.
7, heating and ground heating materials, supply water temperature, pipe spacing, interior design temperature and other factors, the conventional practice, the pipe spacing 100mm-350mm, insulation material for the 15-30mm composite polystyrene board, the average water temperature 35-55 °C, room temperature 15-28 °C.
PE-Xa, b and PE-RT Pipe Construction and Installation I. Pre-construction Preparation 1. Organize the construction personnel to be familiar with the construction plan and design description of the project, as well as relevant specifications, regulations and master the necessary construction process.
2. The used equipment and related equipment should be ready to ensure normal construction.
3, the construction site should be flat and clean, do not allow bumps, and sand and other debris, the interface should be smooth and smooth, no obvious elevation deviation.
4. Temporary facilities such as construction electricity, water and material storage sites can meet construction requirements.
Second, the construction sequence (1) Check and confirm that the concealment works within the construction site area have been completed.
(2) Clean up the laying of PE-Xa, b and PE-RT pipe system sites.
(3) laying a composite insulation layer.
(4) Laying PE-Xa, b and PE-RT pipes and laying them according to the design cycle.
(5) The dispenser is positioned and installed.
(6) PE-Xa, b and PE-RT tube pressure test.
(7) laying steel mesh (responsible by Party A)
(8) PE-Xa, b and PE-RT pipes with pressure (0.4MPa) filled with bean-cement concrete. (responsible by Party A)
Third, the construction quality requirements (1) Construction and installation in addition to the implementation of the project floor heating design basis should also be in line with "heating and sanitation engineering construction and acceptance specifications" (GBJ242-82) and related specifications.
(2) When laying PE-Xa, b, and PE-RT pipes, avoid crossover operations on the same work surface with other constructions.
(3) Before installing the PE-Xa, b, and PE-RT tubes, carefully check the fitting tolerances of the appearance joints and remove dirt and foreign matter inside and outside the tubes and fittings.
(4) The PE-Xa, b and PE-RT pipes shall be laid in accordance with the design drawings and shall be laid in such a way as to avoid errors. PE-Xa, b and PE-RT pipes in the buried parts may not have joints.
(5) During the installation, paint, asphalt and other contaminants shall be prevented from coming into contact with the pipe copper fittings.
(6) PE-Xa, b and PE-RT pipe supply and return pipelines, after the completion of the construction of the distributor flushing pressure test, confirm that the pipeline distributor is clean, can be connected, PE-Xa, b and PE-RT tube Filters must be installed on the water supply and checked regularly every year.
(7) In the heating floor structure, the polystyrene insulation layer has reached the heat insulation purpose when its thickness is 20 mm, and it can prevent the heat conduction between the house and the room from having another sound insulation effect. Pebble concrete can fix PE-Xa, b and PE-RT pipes, increase ground strength, and provide better heat transfer.
(8) If the load on the ground floor is greater than 2 tons/m2, install a reinforcement mesh in the upper part of the floor heating floor, place it 10-20mm above the PE-Xa, b and PE-RT pipe skins, and the mesh diameter φ2-φ4mm. , Network distance 150mm.
(9) In order to ensure the thickness requirements of the design of the bean-cement concrete layer and prevent the overall temperature of the floor layer from being affected, the strength of the bean-cement concrete shall not be lower than C20, and the particle size of the bean-pearl shall not be greater than 8mm, and at the same time, cracks shall be added to the bean-cement concrete. Additives to enhance the compressive strength of the bean-concrete layer and prevent thermal cracking, aging, winter construction must add condensing agent.
(10) The distance between the installation of plastic staples is 0.5 m/pipe, the turn is 0.25 m/set, and the turning radius is >8D.
(11) People entering the construction site should wear soft-soled shoes, and no shoes or iron-clad shoes are allowed on the site. Other iron tools are strictly prohibited except for special construction tools. During the construction process, workers should exercise care and save the tools properly to prevent Pipe damage.
Fourth, the pipeline pressure test 1, the pipeline filled with water, air tightness inspection.
2, according to the design work pressure of 1.5 times the test, after the pressure is stopped, the pressure drop within 15 minutes does not exceed 0.05Mpa, and no air leakage as qualified.
V. Quality Acceptance 1. The intermediate acceptance shall be carried out after the installation of PE-Xa, b and PE-RT pipe laying and distributors are completed, and the pressure test shall be conducted again after the curing period of the concrete filling layer is over. The construction unit shall also cooperate with the supervision unit. .
2. Overall acceptance of the overall acceptance conditions:
(1) Construction drawings, as-built drawings and design change documents.
(2) Factory certificate of main materials, parts, products and equipment.
(3) Intermediate acceptance records and engineering quality accident records.
(4) Hydraulic pressure test records and hidden project records.
(5) Ground buried records.
Sixth, system debugging 1, system debugging should be carried out after the middle acceptance and overall acceptance.
2. Before commissioning, the pipeline system should be checked and flushed firstly. Measures should be taken during the flushing process to prevent foreign matter from entering the system, and at the same time, debug the hydraulic balance of the system's water supply pipeline.
3, to the low-temperature floor heating system radiant water supply, water temperature gradually increased from 30 degrees to 55 degrees, does not allow a short period of sudden temperature rise.
4. Commission and check the temperature control system of heating and heating media to ensure that the low-temperature floor radiation heating system works within the allowable range of the design. The maximum water supply temperature must not exceed 60 degrees.
5. The low temperature floor heating system is full of water conservation during the non-heat season.
6, low temperature floor heating system allows the use of pressure P ≤ 0.6Mpa.
Seventh, finished product protection requirements 1, the completion of the construction of the heating floor is strictly prohibited strong tapping, impact; is strictly prohibited on the ground or roof, drilling, opening holes, shot nails and other endanger the safety of heating pipe operations.
2. In order to prevent the frosted floor heating system from being frozen, it is forbidden to have water in the non-heating system.
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