In fact, B1 grade perlite insulation board is also good. I will introduce some features of this product in practical application. First of all, the external wall insulation can avoid the "heat bridge" phenomenon more than the internal insulation, can effectively avoid the condensation water generated in the heat bridge part, and can also eliminate the heat loss caused by the heat bridge. B1 grade rock wool board is a new type of environmentally friendly material, and its application in exterior wall insulation engineering is very extensive. After the practice test, the external wall insulation technology still has quite obvious advantages.
Secondly, at present, we have also found a relatively large feature. When used, the external wall insulation can increase the temperature of the inner surface of the enclosure, so that the perlite insulation board can reduce the heating by lowering the room temperature without reducing the indoor thermal environment. The energy consumed. Once again, it can effectively improve the humidity of the wall. For example, structural structures such as aerated concrete and hollow blocks can greatly improve the airtightness of the wall itself, which has great positive significance for energy conservation. These points are relatively obvious features, we should From these characteristics, it is not only the A-class that can be used to correctly understand the B1 grade rock wool board.
A spectacle blind or spec blind, is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long term isolation device.
A spectacle blind is machined from a single piece of metal that is cut to match the pipe size, fit between two pipe flanges and requires an additional Gasket when it is installed. Also, the bolts will need to be lengthened depending on what piping class and size blind is used. The thickness of the spectacle blind is specified based on the line pressure and pipe size.
The specification that determines the dimensions of a spectacle blinds is ASME B16.48 - Line Blanks. A line blank conforming to this standard will be marked in the following way:
B16
Nominal Pipe Size (NPS)
Nominal Pressure Class
Material
Manufacturer's Name
If RTJ, the ring number
One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance
Spectacle Blind Flange , Figure 8 Flange , Spacer & Spade , Spectacle Blank , Pandle Spacer
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