Causes of damage to non-metallic expansion joints

Causes of damage to non-metallic expansion joints
Non-metallic expansion joints will fail after a period of use. Expansion joint manufacturer personnel analyze the causes of non-metallic expansion joint failure according to the common failure cases of non-metallic expansion joints. Causes of non-metallic compensator failure in the process of use are:
1 . In the design selection, the user and non-metallic expansion joint manufacturers on the design parameters and site working environment handover is unclear, the design parameters are not accurate production of non-metallic expansion joints will fail for example: non-metallic skin due to the media dust and particulate scouring lead to wear, if the chemical properties and characteristics of the media expansion joint manufacturers will add a guide tube to avoid non-metallic skin wear.
2 . For example, when the non-metallic expansion joint circulation medium is high content of flue gas, if the internal anti-dust is not in place, after a period of time, excessive accumulation of dust leads to non-metallic expansion joint jamming or non-metallic skin extrusion crack phenomenon.
3 . Due to improper placement, fixation and protection during transportation, it is easy to cause partial or overall damage to the non-metallic expansion joint. For example: improper placement or stacking during loading, the protruding parts such as the ear plate or tie rod pierce the skin of adjacent non-metallic expansion joints or the heat insulation packing package.
4 . Improper installation causes failure in the use of non-metallic expansion joints. For example, when welding or cutting the non-metallic expansion joint, the non-metallic skin and thermal insulation packing are not effectively protected, resulting in the non-metallic skin being burned or damaged by welding slag splash, sparks or gas cutting flame; the direction of the guide tube is reversed and the non-metallic expansion joint fails due to deformation under high temperature media washing;
5 . The installation space of non-metallic expansion joints is limited, resulting in the inability to install non-metallic skin due to component interference or the failure of the skin due to poor heat dissipation and overheating.
In order to avoid the failure of non-metallic expansion joints in the selection and installation process, we should pay attention to the details of design selection, use and installation. In the selection of non-metallic expansion joints to clearly grasp the parameters of the non-metallic expansion joint, the choice of non-metallic expansion joint products suitable for the working conditions.