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　　通風管道的工程質量控制標準

　　Engineering Quality Control Standards for Ventilation Ducts

　　風管制作質量標準按照《通風與空調工程施工質量驗收規范GB50243－2016》和《通風管道技術規程JGJ141-2004》執行。

　　The quality standards for the production of air ducts shall be implemented in accordance with the "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering GB50243-2016" and the "Technical Specification for Ventilation Ducts JGJ141-2004".

　　質量保證措施

　　Quality assurance measures

　　首先在對不銹鋼板下料、加工時，工作臺應鋪設地毯，劃線時不得使用鋒利的劃針，度量、咬口時用木方尺和木錘，避免在板材表面造成傷痕和凹陷，風管不需加工的表面應盡量保持平整，不得有錘印。

　　Firstly, when cutting and processing stainless steel plates, a carpet should be laid on the workbench. Sharp marking needles should not be used for marking, and wooden rulers and hammers should be used for measuring and biting to avoid scratches and dents on the surface of the plate. The surface of the air duct that does not need to be processed should be kept as flat as possible without hammer marks.

　　不銹鋼板材在加工或保管堆放過程中，要避免與碳素鋼接觸，防止由于碳素鋼的鐵屑與不銹鋼長時間接觸，使其表面出現腐蝕中心，破壞表面的氧化層鈍化膜。

　　During the processing or storage of stainless steel plates, contact with carbon steel should be avoided to prevent corrosion centers on the surface and damage to the oxide layer and passivation film due to prolonged contact between carbon steel iron filings and stainless steel.

　　焊縫表面和熱影響區不能有裂紋、過熱現象，也不得有氣孔、夾渣，氬弧焊焊縫表面不得有發黑、發黃、花斑等現象。焊接后，應對焊縫及風管表面進行清理，即先去除油污及焊渣和飛濺物、然后用酸洗液鈍化液酸洗鈍化，再用水沖洗干凈。

　　The surface of the weld seam and the heat affected zone must not have cracks, overheating, porosity, or slag inclusions. The surface of the argon arc welding seam must not have blackening, yellowing, or flower spots. After welding, the surface of the weld seam and air duct should be cleaned by first removing oil stains, welding slag, and splashes, then pickling and passivating with acid pickling solution, and finally rinsing with water.

　　不銹鋼風管在制作過程中的防變形處理。①在制作較復雜形狀的配件時先下好樣板，再在不銹鋼板上劃線下料，以免下錯料引起返工、產生不必要的變形。②盡量使用機械加工，如剪切、折邊、咬口等做到一次成型，減少手工操作，因板材經錘擊敲打會引起內應力造成不均勻的變形，敲打次數越多應力就越大、板材變硬、造成加工困難、容易產生變形。③采用正確的焊接順序和組對方法：焊接時宜從中間往兩頭逆向分段施焊，使風管焊縫均勻地受熱和冷卻，以減少變形；組對焊接時先將風管點焊后，用夾具將其固定后再進行焊接，焊接時形成的高溫，在冷卻過程中所產生的收縮變形由夾具克服，達到防止變形的目的。直角形加固焊接使用夾具實物圖參見圖8.2.4。④變形后的矯正，焊后用木錘或銅錘另一側襯墊板（與風管同弧度）進行錘擊矯正，錘擊時用力均勻、不得猛烈敲擊。

　　Anti deformation treatment of stainless steel air ducts during the manufacturing process. ① When making accessories with complex shapes, first make a sample, and then mark the material on the stainless steel plate to avoid rework and unnecessary deformation caused by cutting the wrong material. ② Try to use mechanical processing, such as cutting, folding, biting, etc., to achieve one-time molding and reduce manual operations. The hammering of the board can cause uneven deformation due to internal stress. The more times the board is hammered, the greater the stress, making it harder to process and prone to deformation. ③ Adopting the correct welding sequence and assembly method: During welding, it is advisable to weld in reverse sections from the middle to both ends, so that the air duct weld is evenly heated and cooled to reduce deformation; When welding, the air duct is first spot welded and then fixed with a fixture before welding. The high temperature formed during welding and the shrinkage deformation generated during cooling are overcome by the fixture to prevent deformation. The actual picture of the fixture used for right angle reinforcement welding is shown in Figure 8.2.4. ④ Correction after deformation: After welding, use a wooden or copper hammer to hammer and correct with a backing plate on the other side (with the same curvature as the air duct). When hammering, apply even force and do not strike violently.

　　直角形加固焊接使用夾具實物圖

　　Physical picture of fixture used for right angle reinforcement welding

　　在斷續焊時，為保證焊縫的長度及間距的統一，在焊接前，需將焊縫的位置畫出后，再行施焊。

　　In intermittent welding, in order to ensure the uniformity of the length and spacing of the weld seam, the position of the weld seam needs to be drawn before welding.

　　環保措施

　　Environmental protection measures

　　氬弧焊加工場地應確保足夠的通風，使場內環境良好。

　　The argon arc welding processing site should ensure sufficient ventilation to maintain a good indoor environment.

　　不銹鋼酸洗鈍化后的水需倒在精選位置。

　　The water after pickling and passivation of stainless steel should be poured into the designated location.

　　嚴格執行當地有關環保要求的其他規定。

　　Strictly implement other regulations related to environmental protection in the local area.

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