Flange gaskets resistant to formic acid, acetic acid, and propionic acid
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Currently, the pipes used for transporting formic acid, propionic acid, and acetic acid are made of PPR material, with PTFE gaskets used; however, their sealing performance is poor； Since PTFE gaskets are quite hard, and the strength of PPR flanges is not as good as that of steel flanges, tightening the bolts too much can cause the flanges to deform. If the bolts aren’t tightened enough, however, a proper seal cannot be achieved. Is there any expert guidance on what kind of gasket would be suitable in this situation? Thank you!
Flexible polytetrafluoroethylene sealing tape can be used.
It has the same material as the raw material tape, but a different specification; it is very soft in texture. Common specifications include: 4X6, 4X8, 4X10, 4X12, 5X15, 5X25, 5X30, 6X30, etc., with no limit on length.
It has the same material as the raw material tape, but a different specification; it is very soft in texture. Common specifications are listed above.
For temporary use, PTFE gaskets can be used; wrap PTFE tape around them externally, and the sealing effect will be satisfactory. There are now steel-lined PTFE gaskets as well. It depends on the specific location of use
I have a question: what are the specific operating conditions for using expanded polytetrafluoroethylene, and what are the environments where it is particularly suitable?
Eexpanded polytetrafluoroethylene gaskets are currently divided into expanded PTFE strips and expanded PTFE sheet gaskets. My recommendation is as follows: 1. For emergency use on-site in situations with irregular sealing surfaces, expanded PTFE strips can be considered. For long-term use, it is recommended to use cut whole-plate gaskets, as this ensures better sealing performance and reliability. 2. Expanded PTFE sheet gaskets are used in maintenance scenarios such as damaged flange sealing surfaces or misaligned flanges ； As well as in applications such as enamel flanges and plastic flanges. The recommended pressure range for the above products is up to 300 pounds. The temperature ranges from -196 to 200°C; it softens above 230 degrees and vaporizes at 260 degrees. The above operating conditions are due to significant differences in the manufacturing processes of gasket materials among various manufacturers. Further discussions on this issue are welcome.
Using a steel loop flange should solve the problem, right?