Standard for pressure test of reclaimed water pipe network

It is generally believed that 0.1MPa =10m, and the pressure supply at the end of the pipe network stipulated by the state is 0. 14Mpa. 0. 1MPa is equivalent to a standard atmospheric pressure, and the water supply pressure at the end of the pipe network is 0. 14Mpa, which is equivalent to the height of the faucet from the water supply tower (pool) of14m. So the higher the living position, the lower the water pressure will be.

The hydrostatic pressure of the hydrostatic test is the working pressure of the pipeline, and the test pressure should not be lower than 0.80MPa. When the working pressure of the pipeline is less than 0.8MPa, the hydrostatic test pressure is 0.8MPa, and the air pressure test cannot replace the hydrostatic test.

The length of pipeline hydrostatic test should not be greater than 1000m m, and the length of pipeline section with accessories in the middle should not be greater than 500m m. Pipes made of different materials in the system should be tested separately.

Check whether the end of the pressure test pipe section is firm and reliable, and the valve shall not be used as a sealing plate.

Mechanical equipment with metering device shall be used for pressurization, the accuracy shall not be less than 1.5 (maximum permissible error shall not exceed 0.5% of the maximum scale of 65438+), the measuring range shall be 1.3~ 1.5 times the test pressure, and the dial diameter shall not be less than 150mm.

According to national regulations, the pressure of residential water supply should not exceed 0.35MPa, that is, 35 meters, and the head loss of the pipeline and the head of the most unfavorable point 10 meter should be deducted. Finally, it depends on the pressure provided by local water supply units. 2. It is generally considered that 0. 1 MPa = 10 m, and the supply pressure at the end of the pipe network stipulated by the state is 0. 14Mpa. According to national standards and industry social commitments, the pressure of tap water pipe network reaches 0. 14 MPa, which is considered as qualified. In layman's terms, it means that as long as the pressure of tap water can guarantee the height of four floors. (Upon inquiry, Shanghai is 0. 16Mpa). If you live in a low-lying place, the water pressure at the end of the pipe network may increase. So it depends on the floor where you live to judge the water pressure in your home. But if you live in a small high-rise building and tap water is supplied by secondary pressure, the surrounding water pressure will increase greatly. You can ask the property to see what range they will control the water pressure. 3. What is the concept of six kilograms of water pressure? Ppr pipe can bear 6 kilograms of water pressure. What is the water pressure of the normal tap water pipeline? It is this pressure that can pump water to 60 meters high, that is, the pressure generated by a 60-meter-high water column. Now almost all owners use PPR water pipes for decoration, so it is no problem to bear the pressure above 0.6Mpa! According to the Code for Planning of Urban Water Supply Project (GB50282-98) issued by the Ministry of Construction, the water supply pressure of urban water supply network should meet the requirements of 28m service head at the user connection point.