Inspection method: measure with level gauge, stay wire and ruler.
fourteen 10.2.1 the slope of drainage pipeline must meet the design requirements, and no slope or reverse slope is strictly prohibited.
Requirements for water filling of drainage pipeline: 1.
The water quality inspection report shall be issued after the water supply network is handed over five 4.3.1 after the indoor fire hydrant system is installed, the fire hydrant on the roof floor (or in the water tank room) and two fire hydrants on the first floor shall be taken for fire test, and it is qualified if it meets the design requirements.
Test method: field test.
When the through wall pipe is connected with the inlet and outlet pipes of the pump or booster equipment, a flexible connection should be set at the connection.
The slope of drainage pipeline meets the design requirements fifteen 11.3.3 after pipeline flushing, water and heating shall be supplied for trial operation and commissioning.
Irrigation test of rainwater pipe and sewage pipe leakage of drainage pipe after irrigation and leakage of pipe after ceiling seven 8.2.1 when the design does not indicate the pipeline installation slope, it shall comply with the following provisions: (1) the slope of hot water heating pipeline with gas and water flowing in the same direction, steam pipeline and condensate pipeline with steam and water flowing in the same direction shall be 3 ‰ and shall not be less than 2 ‰; (2) The gradient of hot water heating pipeline with reverse flow of gas and water and steam pipeline with reverse flow of steam and water shall not be less than 5 ‰; (3) The slope of radiator branch pipe shall be 1%, and the slope direction shall be conducive to exhaust and drainage.
2.
Type A is applicable to steel pipes, and types B and C are applicable to ductile iron pipes.
Rigid waterproof casing is applicable to structures (buildings) where the pipeline passes through the wall and does not bear pipeline vibration and expansion deformation.
When injecting water into the pipe network, the air in the pipe network shall be drained and the pressure shall be increased slowly.
At the same time, check that there is no leakage at each connection.
The test point of hydraulic strength test of sprinkler system shall be set at the lowest point of system pipe network.
Spraying test of roof fire hydrant six 5.2.1 the concealed or buried drainage pipeline must be subject to water filling test before concealment, and the water filling height shall not be lower than the upper edge of the bottom sanitary ware or the ground height of the bottom floor.
The rainwater pipe shall be filled with water to the rainwater bucket at the upper part of each riser for 1H without leakage.
Source: the comprehensive code for acceptance of construction quality of building water supply, drainage and heating engineering is the most basic specification that should be followed in water supply, drainage and heating construction, and the standard to ensure project safety, use function, human health, environmental benefits and public interests.
2.
Test method: the test time is 2 ~ 3min, and there is no pressure drop, no leakage and no leakage.
Inspection method: the pressure drop of the heating system using steel pipe and composite pipe shall not be greater than 0.02MPa within 10min under the test pressure.
Full water column length: a section of jet length from the nozzle of the water gun to the point where 90% of the water column of the jet passes through the circle with a diameter of 38cm.
Inspection method: observe, measure with level ruler, pull wire and ruler.
After reaching the test pressure and stabilizing for 30min, the pipe network shall be free of leakage and deformation, and the pressure drop shall not be greater than 0.05Mpa.
The test pressure shall meet the design requirements.
The structural form of waterproof casing is divided into three types: flexible waterproof casing (A / b pipe type), rigid waterproof casing (A / B / C type) and rigid waterproof wing ring.
When heating conditions are not available, it shall be postponed..
three 4.1.2 the water supply pipeline must adopt pipe fittings suitable for the pipes, and the materials involved in the domestic water supply system must meet the hygienic standard of drinking water.
The pipe passing through the wall bears vibration and pipe expansion deformation, or the outer wall of structures (buildings) with strict waterproof requirements.
Inspection method: check on site before concealment.
4.
The district and county centers for Disease Control and prevention shall conduct on-site sampling inspection and issue the test report.
Inspection report of water supply pipeline CDC four 4.2.3 the pipes of domestic water supply system must be washed and disinfected before being delivered for use, and can be used only after sampling and inspection by relevant departments and meeting the national drinking water standard.
Hydrostatic test of buried coil before concealment eleven 8.6.1 after the installation of heating system, hydrostatic test shall be conducted before pipeline insulation.
twelve 8.6.3 after the system is flushed, it shall be filled with water and heated for test run and commissioning.
For areas with seismic fortification requirements, if rigid waterproof casing is adopted, flexible connection shall be set nearby on the pipeline entering the pool wall or the upper wall of the building.
Among them, 20 mandatory provisions are the bottom line of construction quality, which should be understood during construction, No arbitrary violation is allowed.
Hydrostatic test before installation of the whole set of radiators nine 8.5.1 the buried part of coil laid under the ground shall not have joints.
Test method: check the test report provided by relevant departments.
Inspection method: observe and measure the room temperature to meet the design requirements.
Hydraulic test requirements for mobilization test of fan coil unit: 1.
For buildings with strict waterproof requirements, flexible waterproof casing must be used.
Observe the metal and composite pipeline system under the test pressure for 10min, the pressure drop shall not be greater than 0.02MPa, and then reduce it to the working pressure for inspection, which shall be free of leakage; The plastic pipe water supply system shall be stabilized for 1H under the test pressure, and the pressure drop shall not exceed 0.05Mpa, and then stabilized for 2h under the condition of 1.15 times the working pressure, and the pressure drop shall not exceed 0.03mpa.
Coil buried concealed without joint ten 8.5.2 before the coil is concealed, the hydraulic test must be carried out, and the test pressure is 1.5 times of the working pressure, but not less than 0.6MPa.
Radiator installation, branch pipe 1% slope eight 8.3.1 after the radiator is assembled, and before the installation of the whole set of factory radiators, a hydrostatic test shall be conducted.
Inspection method: observe the turbidity of flushing water and check the inspection report provided by relevant departments.
When the design is not indicated, the following provisions shall be met: (1) for steam and hot water heating system, the hydrostatic test shall be conducted with the working pressure at the top of the system plus 0.1MPa, and the test pressure at the top of the system shall not be less than 0.3MPa.
Installation diagram of flexible casing two 3.3.16 various pressure bearing pipeline systems and equipment shall be subject to hydrostatic test, and non pressure bearing pipeline systems and equipment shall be subject to water filling test.
3.
2.
The flexible waterproof casing is applicable to areas with seismic fortification requirements.
(3) For the hot water heating system using plastic pipes and composite pipes, the hydrostatic test shall be conducted with the working pressure at the top of the system plus 0.2MPa, and the test pressure at the top of the system shall not be less than 0.4MPa.
After it is reduced to the working pressure, it shall be checked to ensure no leakage and leakage; For the heating system using plastic pipes, the pressure drop shall not be greater than 0.05Mpa within 1h under the test pressure, then depressurize to 1.15 times the working pressure, stabilize the pressure for 2h, the pressure drop shall not be greater than 0.03mpa, and there shall be no seepage and leakage at each connection.
Test method: the pressure drop within 1h of pressure stabilization shall not be greater than 0.05Mpa, and there shall be no leakage.
If there is no design requirement, the test pressure shall be 1.5 times of the working pressure, but shall not be less than 0.6MPa.
(2) For high temperature hot water heating system, the test pressure shall be the working pressure at the top of the system plus 0.4MPa.
It is qualified if the water level does not drop for 15min and then filled for 5min, the liquid level does not drop, and there is no leakage in the pipeline and interface.
The tightness test pressure shall be the design working pressure, and there shall be no leakage after stabilizing for 24h.
3.
For low radiant heat pipe, the pressure drop shall not be greater than 0.05Mpa and no leakage within 1h under the test pressure.
thirteen 9.2.7 after the completion of the water supply pipeline, the pipeline must be flushed, and the drinking water pipeline must be disinfected after flushing to meet the sanitary requirements of drinking water.
Installation requirements for rigid and flexible waterproof casing of exterior wall waterproof casing: 1.
Test firing requirements: the elevation angle of test firing is about 45 ~ 60 °, the length of full water column is 10m for buildings below 100m, and 13m for buildings over 100m.
one 3.3.3 if there are pipes passing through the outer wall of basement or underground structure, waterproof measures shall be taken.
