A key focus during this transformation was achieving energy efficiency through heat recovery below the acid dew point. Such an endeavor requires materials that can meet the demanding requirements of flue gas utilization. The challenge intensifies when temperatures descend below the acid dew point, resulting in mixed acids condensing on the heat transfer surfaces.
Technoform's PPS-GR tubes rise to this challenge, offering impressive resistance to such demanding conditions. To ensure compliance with pressurized systems, these tubes were tested according to ASME standards with a hydrostatic test pressure of 25 bar.
The original PFA-coated steel tubes experienced severe corrosion, prompting their replacement. The transition to Technoform's PPS-GR tubes was both quick and straightforward, thanks to their simple sealing system featuring an O-ring connection. There was no need for welding, as is typically required with conventional steel tubes.