Everyone is not very familiar with the ventilation pipeline. The ventilation pipeline should not only be anti-corrosion and heat preservation, but also pay attention to the matters needing attention in the installation of the ventilation pipeline.

　　山東通風管道

　　Shandong Ventilation Pipeline

　　（1）當風管與風機連接時，應在進出風口處加軟接頭，其軟接頭的斷面尺寸應與風機進出風口一致。軟管接頭一般可采用帆布、人造革等材料，軟管長度不宜小于200，松緊度應適宜，柔性軟管可緩沖風機的振動。

　　(1) When the air duct is connected with the fan, a soft joint should be added at the inlet and outlet of the fan. The cross-section size of the soft joint should be the same as that of the inlet and outlet of the fan. The hose joint can generally be made of canvas, artificial leather and other materials. The length of hose should not be less than 200, the tightness should be appropriate, and the flexible hose can cushion the vibration of the fan.

　　（2）雙吊桿支架在風道就位后，應保證橫擔平直，吊桿不扭轉，雙吊桿受力均勻。

　　(2) After the double suspender bracket is in place in the airway, it should ensure that the cross-arm is straight, the suspender does not twist, and the double suspender bears uniform force.

　　（3）當風道與除塵設備、加熱設備等連接前，應待設備安裝完畢后，按實際測繪的圖紙進行預制和安裝。

　　(3) When the air duct is connected with dust removal equipment and heating equipment, it should be prefabricated and installed according to the actual surveying drawings after the installation of the equipment.

　　（4）山東通風管道安裝時，進、出風日宜在風道預制時開出洞口，如需在安裝完畢的風道上現開風口，其接口處應嚴密。

　　(4) When installing Shandong ventilation pipeline, the inlet and outlet days should be opened when the duct is prefabricated. If the outlet is to be found in the installed duct, the interface should be tight.

　　（5）當輸送含凝結水或含濕量較大的氣體時，其水平管道宜設有坡度，并在低點處接排水管。安裝時風道底部不宜出現縱向接縫，對底部有接縫處應進行密封處理。

　　(5) When conveying gas with condensate water or high moisture content, the horizontal pipeline should have a slope and be connected with a drainage pipe at a low point. Longitudinal seams should not appear at the bottom of the air duct during installation. Sealing treatment should be carried out at the seams at the bottom.

　　（6）對輸送易燃、易爆氣體的鋼板風道，在風道連接法蘭處應安裝跨接線，并與靜電接地網連接。

　　(6) For steel plate air ducts conveying flammable and explosive gases, a cross connection shall be installed at the flange of the air duct connection and connected with the electrostatic grounding grid.

　　（7）當水平風道高度在4m以上時，安裝人員應系帶。腳手架或移動式支架上的跳板應固定好，跳板寬度應符合規范，在腳手架上的安裝人員宜攜工具袋，防止工具或電鉆等物墜落傷人。

　　(7) When the height of horizontal duct is more than 4m, the installation personnel should wear seat belts. The springboards on scaffolds or mobile supports should be fixed well, the width of springboards should conform to safety standards, and the installers on scaffolds should carry tool bags to prevent tools or electric drills from falling and injuring people.

　　通風管道防腐保溫的必要性：當風道輸送一般氣體時，對黑鋼板風道應進行除銹、刷防銹漆處理，對含塵氣體可噴涂防磨損保護層。在風道輸送高溫氣體或低溫空氣時，風道外壁應做保溫(保冷)處理。當周圍環境空氣濕度較大時，風道外壁需做防腐蝕、防銹處理。對輸送高溫、高濕氣體的鍍鋅鋼板風道內壁宜噴刷磷化底漆或其他耐蝕涂料。

　　Necessity of anti-corrosion and heat preservation of ventilation pipeline: When the air duct conveys general gas, the air duct of black steel plate should be treated with rust-removing and anti-rust paint brushing, and the dust-containing gas can be sprayed with anti-wear protective layer. When conveying high temperature gas or low temperature air in the duct, the outer wall of the duct should be treated with heat preservation (cold preservation). When the ambient air humidity is relatively high, the outer wall of the duct needs to be treated with anti-corrosion and anti-rust. Phosphating primer or other corrosion resistant paint should be sprayed on the inner wall of galvanized steel duct conveying high temperature and humidity gas.