1. The air leakage test device shall be a qualified special measuring instrument or a measuring device composed of measuring elements in accordance with the current national standard measuring full pipe fluid flow with differential pressure device installed in circular section pipeline (gb2624).

2、正壓或負壓風管系統與設備的漏風量測試，分正壓試驗和負壓試驗兩類，可采用正壓試驗的測試來檢驗。

2. The air leakage test of positive pressure or negative pressure air duct system and equipment is divided into positive pressure test and negative pressure test, which can be tested by positive pressure test.

3、風管系統漏風量測試可整體或分段進行。

3. The air leakage test of air duct system can be carried out as a whole or in sections.

4、風管系統漏風量測試應按下列步驟進行：

4. The air leakage test of air duct system shall be carried out according to the following steps:

①測試前，被測風管系統的所有開口處均應嚴密封閉，不得漏風。

① Before the test, all openings of the tested air duct system shall be tightly closed without air leakage.

②將專用的漏風量測試裝置用軟管與被測風管系統連接。

② Connect the special air leakage test device with the measured air duct system with a hose.

③開啟漏風量測試裝置的電源，調節變頻器的頻率，使風管系統內的靜壓達到設定值后，測出漏風量測試裝置上 流量節流器的壓差值△P。

③ Turn on the power supply of the air leakage test device, adjust the frequency of the frequency converter to make the static pressure in the air duct system reach the set value, and then measure the pressure difference △ P of the flow restrictor on the air leakage test device.

④測出流量節流器的壓差值△P后，按公式Q=f(△P)(m³/h)計算出流量值，該流量值Q(m³/h)再除以被測風管系統的展開面積F(㎡)，即為被測風管系統在實驗壓力下的漏風量QA[m³/(h·㎡)]。

④ After measuring the pressure difference △ P of the flow restrictor, press the formula q = f (△ P) (M ³/ h) Calculate the flow value, which is Q (M ³/ h) Divided by the developed area f (㎡) of the tested air duct system, it is the air leakage QA [M] of the tested air duct system under the experimental pressure ³/( h·㎡)]。

5、當被測風管系統的漏風量QA[m³/(h·㎡)]超過設計或本規程的規定時，應查出漏風部位(可用聽、摸、觀察、肥皂水或煙氣檢漏)，做好標記;并在修補后重新測試，直合格。

5. When the air leakage of the measured air duct system is qa[m ³/( H · ㎡)] when it exceeds the provisions of the design or this specification, find out the air leakage part (listen, touch, observe, soapy water or smoke leak detection) and mark it; And retest after repair until qualified.

6、風管漏風量測試用測量工具或檢測儀器應符合表6的規定。

6. Measuring tools or instruments for air leakage test of air duct shall comply with the provisions of table 6.