What are the quality requirements for the water supply pipeline hydraulic strength test

GB50242-2002 stipulates: "The hydrostatic test of indoor water supply pipes must meet the design requirements. When the design is not specified, the test pressure of the water supply pipeline system of various materials is times of the working pressure, but shall not be less than kg).

Calculation of hydrostatic test pressure:

Generally, it is a multiple of the design pressure as the hydrostatic test pressure. The design pressure is generally times the working pressure. The calculation result is less than the test pressure.

Experimental method: The metal and composite pipe water supply pipeline system should be observed under the test pressure for 10min, and the pressure drop should not be greater than.

MPA [kg], and then lower to the working pressure for inspection, should not seep or leak. The plastic pipe water supply pipeline system should be stabilized under the test pressure for 1h (hour), and the pressure drop shall not exceed kg]; Then stabilize the pressure for 2 h (hour) at the time of the working pressure, and the pressure drop shall not exceed kilograms], and check that the connections shall not leak.

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1. Ductile iron pipe: working pressure p, test pressure is 1MPa. The working pressure is p, and the test pressure is p+.

2. Use steel pipe: the test pressure is: working pressure p+, and not less than.

Nominal pressure refers to.

Bai is its rating.

DU pressure, that is, when the pipeline is designed, DAO believes that the most suitable special pressure working pressure refers to the pressure borne by the actual work, and it is generally believed that the closer to the nominal pressure, the better the test pressure refers to the pressure used to measure whether the pipeline meets the requirements of the test after the pipeline is made, which is generally higher than the nominal pressure, and the specific value depends on the standard requirements, some times, some times, of course, not necessarily these two, how many standards require, how much. /

<> water supply pipe strength test pressure refers to a test carried out on a newly built or renovated water supply pipe that has been installed, in order to test whether the pipe can withstand the pressure under normal use and unexpected conditions. According to the requirements of the Code for Construction and Acceptance of Building Water Supply and Drainage Engineering (GB 50242-2002), the strength test pressure of water supply pipeline should be times the design pressure. Among them, the design pressure refers to the maximum pressure resistance value of the pipeline calculated according to the material, diameter, length, flow rate and other parameters of the pipeline in the design stage.

For example, if the design pressure of a water supply pipe is 1MPa, then its strength test pressure should be. During the test, the test pressure should be kept stable and lasted for more than 10 minutes, and the pipeline should be observed for leakage and deformation. It should be noted that if the design pressure of the pipeline has been exceeded, then the test pressure should be used in times the design pressure when performing the strength test.

What is the pressure of the water supply pipe strength test?

<> water supply pipe strength test pressure refers to a test carried out on a newly built or renovated water supply pipe that has been installed, in order to test whether the pipe can withstand the pressure under normal use and unexpected conditions. According to the requirements of the Code for Construction and Acceptance of Water Supply and Drainage Engineering of Air Mill Building (GB 50242-2002), the strength test pressure of the water supply pipeline should be times the design pressure. Among them, the design pressure refers to the maximum pressure resistance value of the pipeline calculated according to the material, diameter, length, flow rate and other parameters of the pipeline in the design stage.

For example, if the design pressure of a water supply pipe is 1MPa, then its strength test pressure should be. During the test, the test pressure should be kept stable and lasted for more than 10 minutes, and the pipeline should be observed for leakage and deformation. It should be noted that if the design pressure of the pipeline has been exceeded, then the test pressure should be doubled when the strength test is carried out.

Tips: In addition to the strength test pressure, there are other test pressures for water supply pipelines, such as water tightness test pressure and leakage test pressure. The water tightness test pressure refers to closing the inlet and outlet outlets after the pipeline is filled with water, and observing whether the pipeline has leakage.

The leak test pressure refers to the fact that after the pipeline is filled with water, the pressurized ridge quietly reaches a certain value, and then the water inlet is closed to observe whether there is a leakage in the pipeline. The purpose of these tests is to ensure that the water supply pipeline can operate stably under normal use and accidents, and does not cause harm to the surrounding environment. Therefore, when designing and constructing water supply pipelines, they should be carried out in strict accordance with the requirements of relevant specifications to ensure the quality and safety of the slag of the pipeline.

Hello, dear, the water supply pipeline strength test is a necessary test before the pipeline conveys water, the main purpose is to detect whether the pipeline and pipe fittings have sufficient strength and resistance, to ensure that there will be no leakage, bursting and other problems under normal use conditions. According to the national standard "Code for Design of Building Water Supply and Drainage" (GB50143-2013) and its appendix, the strength test pressure of water supply pipelines shall meet the following requirements: 1

The test pressure of the pipeline should be a multiple of the nominal pressure and should not be lower. Nominal pressure refers to the pressure resistance capacity and operating pressure level of the pipeline specified in the setting of the mountain time, which is an important parameter in the pipeline design and should be selected in accordance with the relevant standards and specifications. 2.

The time of the pipeline strength test shall not be less than 2h, and the pressure should be continuously increased during the test until the test pressure is reached, and it should be maintained for a period of time. Typically, pipes often need to go through multiple strength test cycles to ensure they adequately meet the design requirements. It should be noted that the water supply pipeline strength test is a very strict test that needs to meet the requirements of national standards, building regulations and other applicable regulations.

Adequate preparation is required before the test is carried out to ensure the safety and reliability of the pipeline and test equipment and to prevent accidents and injuries. At the same time, attention should be paid to safety and protection of the environment during the test to ensure the smooth progress of the test.

Good afternoon, dear, I'm honored to answer for you. Water supply pipe hydrostatic test records and pipe strength are not the same thing, but they are related. The hydrostatic test record of the water supply pipeline is a method of verifying whether the quality of the water pipeline meets the requirements, usually after the installation of the pipeline is completed.

The hydrostatic test record is mainly to test whether the pipeline can withstand the water pressure under the design pressure, and to see whether the sealing performance of the pipeline is qualified. Pipe strength refers to the maximum pressure and external force that the pipeline can withstand, which is a physical property of the pipeline material. Under normal circumstances, the strength requirements of the water supply pipeline should be higher than the design pressure to ensure its normal operation and safety of wild travel and use.

Therefore, the water supply pipeline hydraulic test record and the pipe strength are both indicators to measure the quality of the water supply pipeline, but they are different concepts. The hydrostatic test record is a test of the pressure bearing and sealing performance of the pipeline during use, and the strength of the pipe is one of the physical properties of the pipeline material, which needs to be considered in the design and production stage. I hope my reply can help you

Dear users, water supply pipeline hydraulic test record and pipe strength are different concepts. The water supply pipeline hydrostatic test record refers to the process of conducting a hydraulic test to test the tightness and pressure resistance of the pipeline system and record the test results after the installation of the water supply pipeline is completed. The strength of the pipeline refers to the resistance of the pipeline under the action of external forces such as internal and external pressure, temperature changes, and **, which is one of the physical properties of the pipeline.

Although the water supply pipeline hydraulic test record and pipeline strength are not the same thing, they are very important indicators in pipeline engineering, which are of great significance for ensuring the normal operation and safety of the water supply system.

Answer]: B Analysis] The first fibrillation test point of this question involves the content of the hydrostatic test of the water supply and drainage pressure pipeline. The hydraulic test of water supply and drainage pressure pipeline is divided into two stages: pre-test and main test.

The hydraulic test process and qualification judgment are as follows: in the pre-test stage, the water pressure in the pipeline will be slowly raised to the specified test pressure and stabilized for 30min, during which if the pressure drops, water can be injected to make up the pressure, and the supplementary pressure shall not be higher than the test pressure; Check whether there is water leakage or damage in pipeline interfaces, fittings, etc.; When there is water leakage and damage, the pressure test should be stopped in time, and the pressure test should be re-tested after finding out the cause of the bending and taking corresponding measures. In the main test stage, water injection and pressure replenishment were stopped, and it was stable for 15min; When the pressure drop does not exceed the allowable pressure drop value after 15min, the test pressure is reduced to the working pressure and the constant pressure is maintained for 30min.

Answer: A

This question examines the functional test of water supply and drainage pipes. After the installation of water supply and drainage pipelines is completed, the pipeline functional test shall be carried out, including the pressure pipe loose road, which shall be carried out in accordance with the provisions of the "Water Supply and Drainage Pipeline Engineering Construction and Acceptance Code", and the hydraulic test includes the strength test and the tightness test; When the design requires otherwise or there is an objection to the actual allowable pressure drop, the tightness test can be used: when the design requires otherwise or there is an objection to the actual allowable pressure drop, the tightness test can be used as the final basis.