Classification of Ventilation and Exhaust Pipeline Uses:

　　1、凈化空調系統用風管：鍍鋅板、不銹鋼;(使用中可能出現塵源污染的玻璃鋼、復合材料禁用)

　　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、空調系統用風管：鍍鋅板、彩鋼保溫板;(通風管道可使用玻璃鋼、復合材料)

　　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、環境控制系統用風管：鍍鋅板、不銹鋼;(可使用塑料、玻璃鋼、復合材料)

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

　　4、工業通風系統用風管：鋼板、鍍鋅板;(麗博通風管.可使用塑料、玻璃鋼、復合材料)

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

　　注：玻璃鋼風管可分有機、無機二種，根據設計規范有消防要求的禁用有機材質;

　　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、特殊使用場合用風管：礦用涂膠布風筒、礦用塑料通風管;(要求阻燃抗靜電礦用特性)

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

　　通風排煙設備的三種清洗方法：

　　Three cleaning methods of ventilation and smoke exhaust equipment:

　　化學清洗：化學清洗管道是采用化學藥劑，對管道進行臨時的改造，用臨時管道和循環泵站從管道的兩頭進行循環化學清洗。該技術具有靈活性強，對管道形狀無要求，速度快，清洗徹底等特點。

　　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.

　　高壓水清洗：采用50Mpa以上的高壓水射流，對管道內表面污垢進行高壓水射流剝離清洗。該技術主要用于短距離管道，并且管道直徑必須大于50cm以上。該技術具有速度快，成本低等特點。

　　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工業清管技術是依靠泵推動流體產生的推動力驅動PIG(清管器)在管內向前推動，將堆積在管線內的污垢排出管外，從而達到清洗的目的。該技術被廣泛用于各類工藝管道、油田輸油輸汽管道等清洗工程，特別是對于長距離輸送流體的管道清洗，具有其他技術無法替代的優勢。

　　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.