1. Colored steel fiberglass composite pipe with seamless processing technology.

內管無縫加工

Seamless processing of inner tube

內管無縫加工工藝，采用一次性成型工藝，整個內管為一個整體，無膠水粘合，不會產生膠水、玻纖脫落現像，整體防火等級達到不燃A1級，可適用于防排煙系統。

The seamless processing process of the inner tube adopts one-time molding process. The whole inner tube is a whole, without glue bonding, without glue and glass fiber falling off. The overall fire rating reaches incombustible A1, which is applicable to the smoke control system.

2、鍍鋅鐵皮管道。

2. Galvanized iron sheet pipe.

根據標準GB8624-2006中鍍鋅鐵皮的防火性能為A1級，所以鍍鋅鐵皮適用于防排煙系統。

According to the national standard GB8624-2006, the fire resistance of galvanized sheet iron is Grade A1, so galvanized sheet iron is suitable for smoke control system.

3、不銹鋼管道。

3. Stainless steel pipe.

油煙氣體含碳氫化合物、氮氧化物、醛、酮、烴、脂肪酸、醇、芳香族化合物、內酯、雜環化合物等，與水分結合可生成碳酸、亞硝酸、硝酸、鹽酸等強腐蝕酸。

Fume gas contains hydrocarbons, nitrogen oxides, aldehydes, ketones, hydrocarbons, fatty acids, alcohols, aromatic compounds, lactones, heterocyclic compounds, etc., which can be combined with water to form strong corrosive acids such as carbonic acid, nitrite, nitric acid, hydrochloric acid, etc.

不銹鋼具有耐酸堿特性，就以304不銹鋼為例，在空氣中的年腐蝕率小于0.01mm，在類似于排油煙等復雜環境中使用的年腐蝕率小于0.02mm。理論上講304不銹鋼在排油煙管上的應用只需有0.6MM即可保證使用30年以上。

Stainless steel has the characteristics of acid and alkali resistance. Take 304 stainless steel as an example, the annual corrosion rate in the air is less than 0.01 mm, and the annual corrosion rate in complex environments such as lampblack exhaust is less than 0.02 mm. Theoretically speaking, the application of 304 stainless steel in the oil smoke exhaust pipe can be guaranteed to last for more than 30 years with only 0.6MM.

與鍍鋅鋼板比較，保溫性能好、其熱傳導率是鍍鋅鋼板的1/3；不銹鋼材料十分光滑；粗糙度只有鍍鋅鋼板的粗糙度的1/5，不易附著油污;

Compared with galvanized steel sheet, it has good thermal insulation performance and its thermal conductivity is 1/3 of that of galvanized steel sheet; Stainless steel material is very smooth; The roughness is only 1/5 of that of galvanized steel plate, and it is not easy to attach oil stains;