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The fabrication of ventilation pipes and accessories and the pipes and accessories from the closed valve to the mouth of the project shall be welded with 2 ~ 3mm thick steel plate. The welds shall be full, uniform and tight, and the ventilation pipes in the contaminated area shall be welded. The flange with sealing groove shall be selected for the connection between the ventilation pipe and the closed valve, and its contact shall be flat.

法蘭墊圈應選用整圈無接口橡膠密封圈，主體工程內通風管與配件的鋼板厚度應符合設計要求。當設計無具體要求時。鋼板厚度應大于0.75mm.工程測壓管在防護密閉門外的一端應設有向下的彎頭；另一端宜設在通風機房或操控室，并應裝置球閥。

The flange gasket shall be a whole ring of rubber sealing ring without interface, and the steel plate thickness of ventilation pipe and accessories in the main project shall meet the design requirements. When there are no specific requirements in the design. The thickness of the steel plate shall be greater than 0.75mm. A downward elbow shall be set at one end of the engineering pressure measuring pipe outside the protective airtight door; The other end should be set in the ventilator room or control room, and a ball valve should be installed.

濟南通風管道

Jinan ventilation duct

通過防毒通道的測壓管，其接口應選用焊接，通風管的測定孔、洗消取樣管應與管一起制作。測定孔和洗消取樣管應封堵，通風管內氣流方向、閥門啟閉方向及敞開度，應標明明晰。

The joint of the pressure measuring pipe passing through the anti-virus channel shall be welded, and the measuring hole of the ventilation pipe and the decontamination sampling pipe shall be made together with the pipe. The measuring hole and decontamination sampling pipe shall be blocked, and the air flow direction, valve opening and closing direction and opening degree in the ventilation pipe shall be clearly marked.

給水排水管道、供油管道與附件的裝置，壓力排水管宜選用給水鑄鐵管、鍍鋅管、鍍鋅鋼管或UPVC塑料管，其接口應選用油麻填充或石棉水泥抹口，不得選用水泥砂漿抹口，油管絲扣銜接的填料，應選用甘油和紅丹粉的調和物，不得選用鉛油麻絲。油管法蘭銜接的墊板，應選用兩面涂石墨的石棉紙板，不得選用一般橡膠墊圈。

For the devices of water supply and drainage pipes, oil supply pipes and accessories, and pressure drainage pipes, water supply cast iron pipes, galvanized pipes, galvanized steel pipes or UPVC Plastic pipes should be selected. The joints should be filled with oil hemp or plastered with asbestos cement, and cement mortar should not be used. The filler connected with oil pipe threads should be mixed with glycerol and red lead powder, and lead oil hemp wire should not be used. Asbestos paperboard coated with graphite on both sides shall be selected as the backing plate for the connection of oil pipe flange, and general rubber gasket shall not be selected.