Refer to the 02S404 national standard atlas page 5, 6, 7, DN250 of the pipe outer diameter of 273mm, DN250 flexible waterproofing casing flange gland inner diameter of 280mm (D3), so that the 273mm pipe through the flexible casing, the outer diameter of the working pipe and the flange of the flexible casing pressure plate between the distance between the flange of about 3.5mm.
Then by tightening the bolt to make the sealing ring deformation to achieve flexible waterproof casing and pipe sealing effect. Waterproof casing in the product design has been increased on the casing inside, so how much pipe to be used on the pre-buried flexible waterproof casing can be the same specifications.
Expanded Information:
Flexible casing installation instructions
1, when the water surface is a corrosive medium, can be used to seal the gap with sealing materials.
2, casing through the wall in case of non-concrete walls, should be partially changed to concrete walls, the pouring range should be larger than the diameter of the wing ring (D5) 200, and the casing must be poured in the inner wall at a time.?
3, through the wall after the concrete wall should not be less than 300, otherwise the wall should be thickened on one side or both sides of the thickening, thickening part of the diameter of at least D5 + 200.?
4, the weight of the casing to L = 300 calculation, such as after the wall is greater than 300, should be calculated separately.?
5, flexible filler material: asphalt hemp wire, polystyrene board, polyvinyl chloride foam board.?
6, sealing paste: polysulfide sealing paste, polyurethane sealing paste.
7, welding structure size tolerance in the shape and position tolerance in accordance with JB/T5000.3-1998. Welding using manual arc welding, electrode type E4303, brand J422. weld bevel in accordance with the basic shape and size of GB985-88 implementation.
8, when the casing is rolled into shape, the permissible deviation of the weekly factory: D2 ≤ 600, D2 & gt; 600 ± 0.0035D2.
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