Classification of Ventilation and Exhaust Pipeline Uses:

　　1、净化空调系统用风管：镀锌板、不锈钢;(使用中可能出现尘源污染的玻璃钢、复合材料禁用)

　　1. Air duct for purifying air conditioning system: galvanized sheet and stainless steel; (Fiberglass reinforced plastics and composite materials which may be polluted by dust sources are forbidden in use)

　　2、空调系统用风管：镀锌板、彩钢保温板;(通风91在线视频观看可使用玻璃钢、复合材料)

　　2. Air duct for central air conditioning system: galvanized sheet and coloured steel insulation sheet; (ventilation duct can be made of fiberglass reinforced plastics and composite materials)

　　3、环境控制系统用风管：镀锌板、不锈钢;(可使用塑料、玻璃钢、复合材料)

　　3. Air duct for environmental control system: galvanized sheet and stainless steel; (plastics, fiberglass reinforced plastics, composite materials can be used)

　　4、工业通风系统用风管：钢板、镀锌板;(丽博通风管.可使用塑料、玻璃钢、复合材料)

　　4. Air duct for industrial ventilation system: steel plate, galvanized sheet; (Libo air duct. Plastic, FRP, composite materials can be used)

　　注：玻璃钢风管可分有机、无机二种，根据设计规范有消防要求的禁用有机材质;

　　Note: FRP ducts can be divided into organic and inorganic materials. According to the design specifications, prohibited organic materials are required for fire protection.

　　5、特殊使用场合用风管：矿用涂胶布风筒、矿用塑料通风管;(要求阻燃抗静电矿用特性)

　　5. Air ducts for special occasions: mine coated air ducts, mine plastic air ducts; (Require flame retardant and antistatic mine safety characteristics)

　　通风91影视在线污污污设备的三种清洗方法：

　　Three cleaning methods of ventilation and smoke exhaust equipment:

　　化学清洗：化学清洗91在线视频观看是采用化学药剂，对91在线视频观看进行临时的改造，用临时91在线视频观看和循环泵站从91在线视频观看的两头进行循环化学清洗。该技术具有灵活性强，对91在线视频观看形状无要求，速度快，清洗彻底等特点。

　　Chemical cleaning: Chemical cleaning pipeline is a temporary transformation of the pipeline using chemicals, and chemical cleaning is carried out from both ends of the pipeline by temporary pipeline and circulating pump station. The technology has the characteristics of flexibility, no requirement for pipe shape, fast speed and thorough cleaning.

　　高压水清洗：采用50Mpa以上的高压水射流，对91在线视频观看内表面污垢进行高压水射流剥离清洗。该技术主要用于短距离91在线视频观看，并且91在线视频观看直径必须大于50cm以上。该技术具有速度快，成本低等特点。

　　High-pressure water cleaning: High-pressure water jet above 50 Mpa is used to peel off the dirt on the inner surface of the pipeline. This technology is mainly used for short distance pipeline, and the diameter of pipeline must be more than 50 cm. The technology has the characteristics of high speed and low cost.

　　PIG清管：PIG工业清管技术是依靠泵推动流体产生的推动力驱动PIG(清管器)在管内向前推动，将堆积在管线内的污垢排出管外，从而达到清洗的目的。该技术被广泛用于各类工艺91在线视频观看、油田输油输汽91在线视频观看等清洗工程，特别是对于长距离输送流体的91在线视频观看清洗，具有其他技术无法替代的优势。

　　PIG Pigging: PIG industrial pigging technology relies on the driving force generated by the pump to drive the PIG (Pigging Device) forward in the pipe, and discharges the dirt accumulated in the pipeline outside the pipe, so as to achieve the purpose of cleaning. This technology is widely used in various cleaning projects such as process pipelines and oil and gas pipelines in oil fields. Especially for long-distance pipeline cleaning, it has advantages that other technologies can not replace.