What is the maximum pressure/temperature rating for soft soldered joints using 95/5 with acid based flux?

The maximum pressure and temperature rating for soft soldered joints using a 95/5 tin/antimony solder with acid-based flux is indeed 200 psi at 250°F. This rating is significant because it reflects the mechanical and thermal capacities that can be safely sustained when using this type of solder.

Soft solder joints are often preferred for their ease of use and effectiveness in plumbing applications, but they have limitations regarding pressure and temperature. The specific combination of 95% tin and 5% antimony demonstrates a balance that allows for a higher performance rating than some other soldering combinations.

When solder connections are made, using an acid-based flux is essential for cleaning the surface and allowing better wetting of the solder. However, the presence of acid flux limits the joint's operating conditions, which is why it is crucial to adhere to the specified maximums for safety and integrity.

In practical applications, operating above these ratings may lead to joint failure due to factors like thermal expansion, pressure surges, or corrosion over time. Recognizing and adhering to these limits ensures that the soldered joints maintain their strength and functionality within the parameters set for safe use.