General Regulations for Ventilation Pipe Inspection

　　1、風管制作質量的檢驗應按其材料、工藝、風管系統類型、漏風量等級和輸送氣體的不同分別進行，風管的漏風量等級與允許漏風量應符合表1的規定。

　　1. The quality inspection of air duct shall be carried out according to the material, process, type of air duct system, air leakage grade and the gas transported. The air leakage grade and allowable air leakage amount of air duct shall conform to the requirements of Table 1.

　　表1 風管漏風量等級與允許漏風量

　　Table 1 Grades and Permissible Air Leakages of Air Pipes

　　注：① 風管系統按其使用類別分為5級，中壓風管大漏風量不得大于B級，高壓風管大漏風量不得大于C級，特殊要求的風管不得大于D級;

　　Note: 1. The air duct system is divided into 5 grades according to its use type. The maximum air leakage of medium pressure duct should not be greater than that of B grade, the maximum air leakage of high pressure duct should not be greater than that of C grade, and the special requirement duct should not be greater than that of D grade.

　　②、排煙、除塵、低溫送風系統的漏風量不得大于B級;

　　(2) The air leakage of smoke exhaust, dust removal and low temperature air supply system shall not be greater than Class B.

　　③、1級～5級凈化空調系統的漏風量不得大于C級;

　　(3) The air leakage of grade 1-5 purifying air-conditioning system should not be greater than grade C.

　　④、E級用于病毒學實驗室等有特殊用途的風管;

　　(4) Class E is only used in virology laboratories and other special purpose ducts;

　　⑤、P為風管內承受的檢測靜壓，單位為Pa。

　　_, P is the static pressure in the duct, the unit is Pa.

　　2、外購成品風管應按風管類型提供風管耐壓強度、漏風量等級及漏風量等相應的檢測證明文件，檢測證明文件不應超過3年，風管性能檢驗項目應符合表2的規定。

　　2. Outsourcing finished air ducts shall provide corresponding test certification documents such as pressure strength, air leakage grade and air leakage amount according to the type of air ducts. The test certification documents shall not exceed 3 years, and the performance test items of air ducts shall conform to the requirements of Table 2.

　　表2 風管性能檢驗項目表

　　Table 2 Item sheet for air duct performance test

　　注：注明風管類型名稱的，表示該檢驗項僅適用于特定類型風管。

　　Note: If the name of the duct type is indicated, it means that the test item is applicable only to specific types of ducts.

　　3、風管系統的主風管安裝完畢，尚未連接風口和支風管前，應對主干管進行風管系統的漏風量檢驗。

　　3. After installation of the main air duct of the air duct system, the air leakage of the main air duct system should be inspected before connecting the tuyere and branch air duct.