1.
Among them, 20 mandatory provisions are the bottom line of construction quality.
9 8.5.
When the design does not indicate the installation slope of the pipeline, The following provisions shall be met: (1) the gradient of hot water heating pipeline with gas and water flowing in the same direction, steam pipeline with steam and water flowing in the same direction and condensate pipeline shall be 3 ‰ and shall not be less than 2 ‰; (2) the gradient of hot water heating pipeline with gas and water flowing in the opposite direction and steam pipeline with steam and water flowing in the opposite direction shall not be less than 5 ‰; (3) The slope of the radiator branch pipe shall be 1%, and the slope direction shall be conducive to exhaust and water discharge.
Inspection method: check on site before concealment.
Interpretation of 20 mandatory provisions of water supply, drainage and heating engineering ↓↓ 1 ↓ 3.3 3.
2.
Inspection method: observation, level gauge, pull wire and ruler measurement.
7 8.2.
10 8.5.
11 8.6.
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.
The full water column length: from the water gun nozzle to 90% of the jet water column, and the diameter is 38 Cm the length of a jet at the circle.
Type A is suitable for steel pipe, and type B and C are suitable for nodular cast iron pipe.
The buried part of coil laid under the ground shall not have joints.
4.
1.
It needs to be clear about it during construction and shall not be violated at will.
If there are no requirements in the design, the test pressure shall be 1.5 times of the working pressure, but shall not be less than 0.6MPa.
It is a standard to ensure project safety, use function, human health, environmental benefits and public interests.
The rainwater pipe shall be filled with water to the rainwater bucket at the upper part of each riser for 1H without leakage.
The district and county centers for Disease Control and prevention shall conduct on-site sampling inspection and issue the test report.
Test fire requirements: the test fire elevation is about 45 ~ 60 °, the full water column length is 10m for buildings below 100m, and 13m for those over 100m.
8 # 8.3.1 after the radiator is assembled, and before the installation of the whole group of factory radiators, a hydrostatic test shall be conducted.
Flexible waterproof casing is suitable for areas with seismic fortification requirements, where the pipe passes through the wall to bear vibration and pipe expansion deformation, or structures with strict waterproof requirements (building) external wall of building.
After the installation of indoor fire hydrant system, the roof layer shall be taken (or in the water tank room) for the test fire hydrant and two fire hydrants on the first floor, it is qualified if they meet the design requirements.
Rigid waterproof casing is suitable for structures where the through wall pipe does not bear pipeline vibration and expansion deformation (buildings) for buildings and structures in areas requiring seismic fortification, 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.
For low radiant heat pipe, the pressure drop shall not be greater than 0.05Mpa and no leakage within 1h under the test pressure.
Inspection method: the test time is 2 ~ 3min, no pressure drop, no leakage.
2.
Test method: check the test report provided by relevant departments.
6 5.2.
The installation diagram of flexible casing ＾ 2 ＾ 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 grouting Water test.
Requirements for water filling of drainage pipeline: 1.
2.
For buildings with strict waterproof requirements, flexible waterproof casing must be used.
3 4.1.
1.
The metal and composite pipeline system shall be observed for 10min under the test pressure, the pressure drop shall not be greater than 0.02MPa, and then reduced to the working pressure for inspection, without 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.
If there are pipes passing through the outer wall of basement or underground structure, waterproof measures shall be taken.
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.
2.
3.
After the installation of heating system, hydrostatic test shall be conducted before pipeline insulation.
Inspection method: field test fire inspection.
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.
Hydrostatic test requirements: 1.
Installation requirements of waterproof casing: 1 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.
The tightness test pressure shall be the design working pressure, and there shall be no leakage after stabilizing for 24h.
At the same time, check that there is no leakage at each connection.
2.
When the through wall pipe is connected with the inlet and outlet pipes of pump or booster equipment, flexible connection should be set at the connection.
The test pressure shall meet the design requirements..
1.
Test method: the pressure drop within 1h of pressure stabilization shall not be greater than 0.05Mpa, and there shall be no leakage.
3.
Before the coil is concealed, the hydraulic test must be carried out.
Issue the water quality test report after the water supply network is handed over 5 # 4.3 1.
Inspection report of water supply pipeline CDC # 4.2 3 the domestic water supply system pipes 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.
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.
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 test point of hydraulic strength test of sprinkler system shall be set at the lowest point of system pipe network.
When injecting water into the pipe network, the air in the pipe network shall be drained and the pressure shall be increased slowly.
The test pressure is 1.5 times of the working pressure, but it shall not be less than 0.6MPa.
