01對通風管道制作的要求進行檢查

01 Check the requirements for the production of ventilation ducts

檢查通風管道穿越防護密閉墻、密閉墻的預埋密閉穿墻短管。通風預埋密閉短管采用厚度不小于3mm鋼板機械卷制成形（其厚度還應根據預埋管管徑大小確定，使預埋管不致變形），防爆超壓排氣活門的預埋短管其厚度為6mm，密閉短管中間應設密閉肋，密閉肋厚度為5mm，密閉肋高度為50mm，密閉肋與短管應雙面滿焊、焊縫嚴密。密閉穿墻短管兩端深處墻面的長度應大于100mm，管道內外部除與混凝土接觸部分外均應刷兩道防銹漆。

Inspect the ventilation pipes that pass through the protective sealed wall and the pre embedded sealed short pipes that pass through the sealed wall. The ventilation pre embedded sealed short pipe is formed by mechanical rolling of steel plate with a thickness of no less than 3mm (its thickness should also be determined according to the diameter of the pre embedded pipe to prevent deformation). The pre embedded short pipe of the explosion-proof overpressure exhaust valve should have a thickness of 6mm, and a sealing rib should be set in the middle of the sealed short pipe. The thickness of the sealing rib is 5mm, and the height of the sealing rib is 50mm. The sealing rib and the short pipe should be fully welded on both sides and the weld seam should be tight. The length of the wall at the depth of both ends of the sealed wall penetrating short pipe should be greater than 100mm, and the inner and outer parts of the pipe, except for the part in contact with concrete, should be painted with two layers of anti rust paint.

02對風管連接處制作的要求進行檢查

02 Check the requirements for the production of air duct connections

對染毒區的通風管道連接方法及密封進行檢查。如無設計要求，其風管厚度應采用大于等于3mm的鋼板焊接制作而成。風管與風管連接應采用焊接連接。通風管道與密閉閥門的連接應采用帶密封槽的法蘭連接，其法蘭面應經機床車削加工，保證接觸應平整，法蘭面有1~2mm深的90°密封槽；風管與設備連接法蘭之間應采用整體橡膠法蘭墊圈，防爆超壓排氣活門法蘭連接填料采用5mm整張橡膠墊圈密封（不得有拼縫），其他染毒區風管連接及法蘭與設備連接采用4~5mm整張橡膠墊圈密封（不得有拼縫），連接處不得有漏縫現象。

Inspect the connection method and sealing of ventilation ducts in the contaminated area. If there are no design requirements, the thickness of the air duct should be made by welding steel plates with a thickness of 3mm or more. The connection between air ducts should be welded. The connection between the ventilation duct and the sealed valve should use a flange connection with a sealing groove. The flange surface should be machined by a machine tool to ensure smooth contact. The flange surface should have a 90 ° sealing groove with a depth of 1-2mm; An integral rubber flange gasket should be used between the air duct and the equipment connection flange. The explosion-proof overpressure exhaust valve flange connection filler should be sealed with a 5mm full rubber gasket (without joints). For other contaminated areas, the air duct connection and flange to equipment connection should be sealed with a 4-5mm full rubber gasket (without joints), and there should be no leakage at the connection.

03對通風管制作的要求進行檢查

03 Inspection of the requirements for the production of ventilation pipes

對主體工程內通風管與配件所用材料規格進行檢查。其所用鋼板品種、規格應符合設計要求。同一通風、空調系統的材質應一致。人防工程主體內部的通風管與配件的鋼板厚度應大于0.75mm。

Inspect the material specifications used for ventilation pipes and fittings in the main project. The variety and specifications of the steel plates used should meet the design requirements. The materials of the same ventilation and air conditioning system should be consistent. The steel plate thickness of the ventilation pipes and accessories inside the main body of civil air defense engineering should be greater than 0.75mm.

04對減振吊架制作的要求進行檢查

04 Inspection of the requirements for the production of vibration damping hangers

管道風機采用減振吊架安裝時，風機與減振吊架連接緊密，牢固可靠；采用支、托架安裝時，風機與減振器及支架、托架連接緊密，穩固可靠。

When the pipeline fan is installed with a vibration damping hanger, the connection between the fan and the vibration damping hanger is tight, firm and reliable; When using supports and brackets for installation, the fan is tightly connected to the shock absorber and the brackets and brackets, ensuring stability and reliability.

05對風管咬口制作的要求進行檢查

05 Inspection of the requirements for the production of bite marks on air ducts

風管咬口應緊密，各層板材之間無明顯的空隙。相同厚度同一型式的板材咬縫寬度應一致，不得出現寬窄不一的缺陷，手工制作的咬口縫寬度差控制在2mm以內，咬口機成型的咬口縫兩端偏差不得大于1mm。在咬口縫的搭接處，矩形法蘭四角翻邊、三通、四通管加襠等處避免產生看得見的孔洞。直管拼接不應有十字接縫，咬口縫還不得出現脫落、張開、未壓實和有明顯縫隙等質量缺陷。

The bite of the air duct should be tight, and there should be no obvious gaps between the layers of the board. The width of the biting seam of the same thickness and type of board should be consistent, and there should be no defects of uneven width. The difference in the width of the biting seam made by hand should be controlled within 2mm, and the deviation at both ends of the biting seam formed by the biting machine should not exceed 1mm. At the overlap of the bite seam, avoid visible holes at the corners of rectangular flanges, tees, and crotch joints of four-way pipes. The straight pipe splicing should not have cross joints, and the bite joint should not have quality defects such as detachment, opening, lack of compaction, and obvious gaps.

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