Stack Expansion Joint in Wet and Corrosive Environment (180-200 deg F) on a Coal Fired Boiler

Problem

A&E specified a potential temperature excursion as the primary design parameter. High temperature composite materials were necessary to meet specified design temps and as a result “wicked” and held moisture. This expansion joint was a constant source of leaks and eventually failed many years ahead of typical life expectancy.

Solution

Replaced expansion joint with correct materials for environment and operating conditions. Holz worked with the customer and treated the operating conditions as the primary design parameter while considering the excursion temperatures as secondary.