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The difference between type A and type B flexible waterproof casing
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From the model specifications:
(1) Rigid waterproof casing: A type, B type, C type, A type can be used with seamless steel pipe, BAIB type can be used with cast iron drainage pipe and ductile pipe;
(2) flexible waterproof casing points: A type, B type, A type used in the building of the outer wall, B type used in the building of the wall.
In application:
(1) Rigid waterproof casing is used in the wall of the building that does not have to bear pipeline vibration and telescopic deformation, and the general usable wall thickness is 200mm;
The key flexible waterproof casing can be used in seismic disaster provisions to bear pipeline vibration and telescopic deformation with strict waterproof provisions of the wall inside the building and the general available wall thickness is 300mm
Structurally:
(1) Rigid waterproof casing is welded with seamless steel pipe outside a waterstop ring;
(2) flexible waterproof casing is seamless steel tube welding to live outside 3 wing ring, one side has four screw, welding inside a block slice, coupled with a rubber band, the outside to make a flange, bolts in four sides, overhead welding a seamless steel pipe, the pipe fitted, the flange mount, tighten the self-contained silk, the greater the tight rubber ring, the less water seepage, generally in a waterproof rules with relatively high region, such as tank drain.
Viewed from outside:
(1) Rigid waterproof casing is only composed of steel waterproof casing and wing ring, simple structure;
The key of flexible waterproof casing is: flange waterproof casing, sealing ring, flange clutch pressure plate, wing ring, anchor bolts, nuts, cumbersome structure.
Choose from waterproof characteristics:
(1) Rigid waterproof casing is seamless steel pipe plus wing ring (thick steel plate made of ring sleeve on the seamless steel pipe), installed in the wall (see concrete wall), for general pipe wall, is conducive to the wall of waterproof;
(2) flexible waterproof casing in addition to the outside wing ring, the internal ring, flange wire direct, complete sets of equipment to sell, can also be their own production and processing, with a shock absorber must be the pipeline, such as and centrifugal pump connected to the pipeline wall.
In other words, if you take into account the waterproof characteristics of both sides of the wall, you need to use flexible waterproof casing; If it is only to consider the pipeline over the wall, and do not take into account after the wall, the waterproof characteristics of both sides of the wall and the migration of the pipeline deformation, you can use rigid waterproof casing.
Rigid Bai waterproof sleeve is suitable for the pipe over the wall is not affected by the pipeline vibration and telescopic dao building. For areas with earthquake disaster distribution regulations, if rigid SHU waterproof casing is used, flexible connection should be set in the nearest principle on the pipe entering the side wall or building wall. Type A is suitable for seamless steel pipe, type B, C is suitable for ductile pipe and cast pipe.
Rigid square hydrofoil ring is suitable for the structure (construction) where the pipeline passes through the wall and will not be affected by the pipeline vibration and telescopic structure (construction). It is suitable for the indoor space where the pipeline passes through the wall is relatively limited or the pipeline installation is the upgrading of the structure (construction) building or the pipeline. For areas with earthquake disaster distribution provisions, if rigid waterproof wing ring is selected, flexible connection should be set in the nearest principle on the pipeline into the side wall or building wall. When choosing the type of waterproof casing or producing and processing, the working conditions of the pipeline design scheme and the provisions of installation should be considered. When necessary, the thickness of the wall and the shaft and diameter torsion of the waterproof casing should be determined by the structural designer.
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