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(fù)壓風(fēng)管系統(tǒng)與設(shè)備的漏風(fēng)量測試，分正壓試驗和負(fù)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(fēng)管系統(tǒng)漏風(fēng)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(fēng)管系統(tǒng)漏風(fēng)量測試應(yīng)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(fēng)管系統(tǒng)的所有開口處均應(yīng)嚴(yán)密封閉，不得漏風(fēng)。

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(fēng)量測試裝置用軟管與被測風(fēng)管系統(tǒng)連接。

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

③開啟漏風(fēng)量測試裝置的電源，調(diào)節(jié)變頻器的頻率，使風(fēng)管系統(tǒng)內(nèi)的靜壓達到設(shè)定值后，測出漏風(fēng)量測試裝置上 流量節(jié)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(jié)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(fēng)管系統(tǒng)的展開面積F(㎡)，即為被測風(fēng)管系統(tǒng)在實驗壓力下的漏風(fēng)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(dāng)被測風(fēng)管系統(tǒng)的漏風(fēng)量QA[m³/(h·㎡)]超過設(shè)計或本規(guī)程的規(guī)定時，應(yīng)查出漏風(fēng)部位(可用聽、摸、觀察、肥皂水或煙氣檢漏)，做好標(biāo)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(fēng)管漏風(fēng)量測試用測量工具或檢測儀器應(yīng)符合表6的規(guī)定。

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