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Types of air ducts in Dongguan


规范 规定了风管现场制作、存放和清洗的要求,其中尤其重要的是风管的清洗和清洗后的存放的规定,这些规定对于确保现场施工人员的健康和风管的清洁度以及施工后的净化空调系统的工程施工质量都是十分重要的,经施工实践表明这些都是行之有效的技术措施。 The types of air ducts in Dongguan Lixiang are based on the cleanliness requirements of the clean air conditioning system of the clean room . The " standard " specifies the requirements for the production, storage and cleaning of the air ducts. Of particular importance are the cleaning and Provisions for storage after cleaning. These regulations are very important to ensure the health of site workers and the cleanliness of air ducts, as well as the construction quality of the purification and air-conditioning system after construction. Practices show that these are effective. Technical measures.

The strength and tightness test of the air duct is an important means to check and ensure the quality of air duct processing and production. It should be carried out carefully after the air duct is cleaned. 规范 中首先强调应符合设计文件要求,并作出了有关规定,主要有:风管强度试验是用以检查风管的承压能力,确保系统的安全运行,一般以 1.5 倍工作压力进行气压试验,以没有发现风管的接缝或其他各连接处开裂等损坏现象为合格。 Due to the differences in the size of dust-free workshops in various industries, the composition, type and technical parameters of purification air conditioning systems, the strength and tightness tests of air ducts will have different requirements. Therefore, the " Specifications " first emphasized that It meets the requirements of design documents and makes relevant regulations, mainly including: the duct strength test is used to check the pressure bearing capacity of the duct to ensure the safe operation of the system. Generally , the air pressure test is performed at 1.5 times the working pressure to find no duct. Cracks such as cracks in the joints or other joints are acceptable. > GB 50243 附录 A 进行,风管的允许漏风量应执行该规范中的相关规定,对中压系统的矩形风管,其单位面积风管单位时间内的允许漏风量为 ≤0.0352 P0'65 cm3/li.rri2) ,高压系统的矩形风管应为 ≤0 0117 P0.65( m3/h.m2) P 为风管系统工作压力:对园形风管的允许漏风量应为矩形风管规定值的 50% The tightness test of the air duct is to detect the air leakage under the working pressure. The air leakage detection method of the purification air conditioning system should be carried out in accordance with the current national standard "Code for Acceptance of Construction and Quality of Ventilation and Air Conditioning Engineering Construction" GB 50243 Appendix A. The relevant regulations in this specification shall be implemented. For rectangular ducts of medium-pressure systems, the allowable air leakage per unit area of ducts per unit time is ≤0.0352 P0'65 cm3 / li.rri2) , and rectangular ducts of high-pressure systems It should be ≤0 0117 P0.65 (m3 / h.m2) , P is the working pressure of the air duct system: the allowable air leakage to the circular duct should be 50% of the specified value of the rectangular duct .

级至 5 级的洁净室(区)的净化空调系统的允许漏风量应按高压系统的规定, 6 级至 9 级的洁净室(区)的净化空调系统应按中压系统的规定。 The allowable air leakage of the clean air conditioning system of clean rooms (areas) with air cleanliness level 1 to 5 shall be in accordance with the requirements of high pressure systems, and the clean air conditioning system of clean rooms (areas) from 6 to 9 shall be at medium pressure. System requirements.

的相关规定外,为确保风管的严密性和避免送、回风的被污染, 规范 还规定了风管的咬口缝、法兰翻边平口风管与附件连接处均不得有裂缝或缝隙,若出现微小裂缝、缝隙或孔洞,均应涂复密封胶等:若镀锌钢板风管加工过程出现镀层损坏等缺陷时,还应刷防锈涂料如环氧富锌漆 2 层以上等。 The general project requirements for the quality of air duct production, including allowable deviations, weld quality, air duct connection and reinforcement measures, etc., shall comply with the relevant provisions of the current national standard "Code for Construction and Quality Acceptance of Ventilation and Air Conditioning Engineering Construction" GB 50243 . To ensure the tightness of the air duct and avoid contamination of the sending and returning air, the " Code " also stipulates that there should be no cracks or gaps in the joints of the air ducts, flange flanged flat mouth air ducts and attachments. Cracks, crevices or holes should be coated with sealant, etc .: If there are defects such as coating damage during the galvanized steel pipe processing, anti-rust paint such as epoxy zinc-rich paint should be applied for more than 2 layers. T- 800 mm 等的风管应采取加固措施。 Since the air ducts of the purification air conditioning system should generally be insulated, it is stipulated that air ducts with side lengths longer than equal to T-800 mm should be reinforced. http://jimesale.com/0769-85350459 .

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