专注通风管道加工·排烟罩

　　General Regulations for Ventilation Pipe Inspection

　　1、风管制作质量的检验应按其材料、工艺、风管系统类型、漏风量等级和输送气体的不同分别进行，风管的漏风量等级与允许漏风量应符合表1的规定。

　　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 风管漏风量等级与允许漏风量

　　Table 1 Grades and Permissible Air Leakages of Air Pipes

　　注：① 风管系统按其使用类别分为5级，中压风管大漏风量不得大于B级，高压风管大漏风量不得大于C级，特殊要求的风管不得大于D级;

　　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、排烟、除尘、低温送风系统的漏风量不得大于B级;

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

　　③、1级～5级净化空调系统的漏风量不得大于C级;

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

　　④、E级用于病毒学实验室等有特殊用途的风管;

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

　　⑤、P为风管内承受的检测静压，单位为Pa。

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

　　2、外购成品风管应按风管类型提供风管耐压强度、漏风量等级及漏风量等相应的检测证明文件，检测证明文件不应超过3年，风管性能检验项目应符合表2的规定。

　　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 风管性能检验项目表

　　Table 2 Item sheet for air duct performance test

　　注：注明风管类型名称的，表示该检验项仅适用于特定类型风管。

　　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、风管系统的主风管安装完毕，尚未连接风口和支风管前，应对主干管进行风管系统的漏风量检验。

　　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.