Has polypropylene been tested as a tank material since the compatibility guide was originally published?
Just wondering if there is any info on using polypropylene as a tank material since it's successfully used for diesel fuels. Figured maybe someone has tried it since the compatibility guide was published. Any info would be appreciated.
Question ID: 3682532 Status:
Open Jul 22, 2021 - 03:57 AM
Voted Best Answer
Jul 22, 2021 - 03:57 AM
The use of polypropylene as a tank material is something that we've continued to experiment with in our labs. We find that using it for small tanks poses few problems or risks outside of the difficulty of having getting good weld strength when using plastic welders. However for larger tanks since they tend to be open at the top, unlike a diesel fuel tank, we find that structurally, especially when heated to operating temperatures of 60C these tanks are unable to contain the volume of fluid necessary and require a steel or aluminum frame to keep their walls supported.
Please note that the thermal set temperature of polypropylene is 82.2C. This is far below our recommend 120C (2x operating temperature) minimum that we believe is required for safe operating in production cooling systems.