Attentive Problems in Duct Machining Process

The ducts shall not be of the S-type cuttings, the C-type right-angled cuttings and the connecting corners. Air clean level of 1 to 5 of the duct can not be used buttoned mouth.

Purification air conditioning system duct flange flange spacing should  be less than 100 mm, air cleanliness of 1 to 5 duct flange rivets  spacing should be less than 65mm.

No reinforcement or reinforcement bars shall be provided in the duct.

Duct processing should be used before the cleaning fluid to remove the  surface of the plate oil and dust, cleaning fluid should be used on the  surface of the sheet without damage, dry does not produce dust, and the  human body without harm to the neutral detergent.

Ventilation pipe production should be used to clean the cleaning  solution, after cleaning by the white silk cloth to meet the  requirements of cleaning, phenolic board, should be promptly sealed.

The inner wall of the colored coated steel duct shall be smooth; the  sheet shall not be damaged during processing. The damaged part shall be  coated with epoxy resin.

Duct  seam, riveting joints and flange flanging four corners of the gap,  should be designed and clean grade requirements, the use of coating  sealant or other sealing measures blocked. Sealing materials should be used isobutyl rubber, chloroprene rubber, denatured silica gel as the substrate material. The sealing surface of the duct joint shall be provided on the positive pressure side of the duct wall.

Air duct production site should be relatively closed, the production  site should lay the soft material is not easy to produce dust

The duct should be reduced in longitudinal joints, FRP ventilation pipes, and shall not have transverse joints.

Duct  processing connection bolts, nuts, washers and rivets should be  galvanized or other anti-corrosion measures, shall not use core pulling  rivets.