Pipeline air leakage test

Pipeline air leakage test

Pipeline air leakage testTo ensure that the air leakage rate of the exhaust system duct meets the relevant regulatory requirements, and to ensure the normal operation and performance of the system, in accordance with the "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering"GB 50243-2016Standard, useAF6900The air leakage tester detects the air leakage of the exhaust system pipeline.

IITesting basis

Code for Acceptance of Construction Quality of Ventilation and Air Conditioning EngineeringGB 50243-2016

3、 Testing equipment

AF6900Air leakage tester

4、 Detection range

The scope of this inspection is the exhaust ducts in the exhaust system 1 And exhaust duct 2.

5、 Preparation for testing

1. Understand the basic parameters of the detection pipeline in advance, including the specified working pressure, etc.

2. checkAF6900Air leakage tester, ensure that its battery is sufficient, all components are intact and functioning properly.

3. Prepare suitable testing interfaces based on the specifications and shape of the pipeline, and ensure that the interface connections are tight and free of any leakage points.

   
   

   
   

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6、 Testing steps

according toCode for Acceptance of Construction Quality of Ventilation and Air Conditioning EngineeringGB 50243-2016Set pipeline pressure and experimental pressure

1. Set the test pressureAccording to:GB 50243-2016The specified working pressure for standards and pipelines is for exhaust ducts 1 Set the test pressure to1016.6Pa, exhaust duct 2 Set the test pressure to1017.8Pa. ThroughAF6900The operating interface of the tester inputs the corresponding pressure value and activates the pressure regulating device to achieve the set pressure in the pipeline.

2. stable pressureAfter the pressure inside the pipeline reaches the set test pressure, maintain stable pressure for a period of time to ensure stable measurement conditions.

3. Measure the air leakage rate: Start upAF6900The air leakage measurement function of the tester automatically collects and records the air leakage data of the pipeline per unit time.

4. multiple measurementsTo ensure the accuracy of the test results, perform multiple tests on each pipeline (recommended)3-5Measurements are taken at regular intervals to restore stability to the pressure and other conditions inside the pipeline.

5. data processingProcess the data from multiple measurements and calculate the average value as the final air leakage detection result for the pipeline.

7、 Judgment criteria

according toGB 50243-2016Standard Table4.2.1For low-pressure air ducts, the allowable air leakage calculation formula isQ≤0.1056P0.65Among themPWorking pressure for system air ducts（Pa）. Translate into EnglishP=1000By substituting the formula, the allowable air leakage can be obtainedQ≤0.1056×10000.65≈3.137m3/(h⋅m2)If the test result is less than or equal to this value, it is judged as qualified; If it is greater than this value, it is judged as unqualified.

according toGB 50243-2016The standard for air leakage in exhaust ducts is≤3.137m³/（h・m²）If the test result is less than or equal to the standard value, it is judged as qualified; If it is greater than the standard value, it is judged as unqualified.

8、 Inspection Record Form

9、 Testing report

After the inspection is completed, a detailed inspection report should be prepared based on the original inspection record table and relevant data. The report should include the inspection purpose, basis, equipment, scope, steps, results, judgment, etc., and should be signed and confirmed by the inspection personnel.