Non-metallic expansion joint installation and use requirements

Non-metallic expansion joint installation and use requirements
The technical requirements of non-metallic expansion joints include not only the technical parameters needed for selection, but also the requirements for installation and use. Both of them can make the expansion joint achieve the use effect.
From the technical parameters of the non-metallic expansion joint requirements are:
1 . Design pressure in KPa as a unit.
2 . Medium temperature for different temperature selection of different temperature levels, temperature is a more important parameter. Affects the choice of non-metallic skin material.
3 . Interface size, in order to avoid problems in the later installation need to implement a good internal and external diameter size. Round non-metallic expansion joints need to mark the diameter; rectangular fabric expansion joints marked inside wall length * width.
4 . Connection method, commonly used connection methods are flange, receiver, holding hoop type.
5 . Application conditions, the use of different environments for non-metallic expansion joint structure requirements are different, for example, for the use of flue gas desulfurization pipeline in order to avoid the accumulation of steam to avoid corrosion can be installed through the drainage port.
From the installation and use requirements:
Non-metallic expansion joints are suitable for working pressure ~ 35KPa, working temperature: ~ 200 ℃ of air, flue gas and dry and wet gas media. When installing, it is necessary to pay attention to the "flow direction mark" and the pipeline or equipment to maintain the same direction of media flow. If pre-stretching or pre-compression is required, it can be done by adjusting the nut on the transport tie bar. For non-metallic expansion joints that require lateral pre-deflection on site, one end should be fixed, the other end should be suspended, and then the positioning nut on the transport tie bar should be loosened and the interface should be adjusted and then fixed.