Isn't it time you changed to the most effective Tube Shield in the Marketplace?
ATTENTION: Users of 308 and 309 Stainless Steel Tube Shields
Our Material Content outlasts all others
Boundary Tube Shields are made with Ferritic Chromium Iron with a room temperature hardness of 300-350 BHN. This material age
hardens in service with the formation of chrome carbides. These carbides award the wear resistance of our material to the fly
ash, and to other erosion causing particles in the stream, past the heat tubes. The 308 and 309 stainless steels do not have carbides.
Increased Productivity and Less Downtime = Better Value
The superior material content of our tube shields makes them last for up to four times longer than any other tube shield. You benefit with less
shutdown for tube shield replacement. This helps make them the most cost-effective choice offered today.
Optimum Operating Efficiency
Our shields will facilitate the conduction of heat to a maximum capacity. The maximum operating temperatures of our material is 1900°F to
2000°F (1060°C to 1095°C).
The figure above depicts the age hardening of Ferritic High Chromium iron at 1100°F and 1300°F.
Source: Grey & Ductile Iron Casting Handbook
The hardness peaks at approximately 100 days. At higher operating temperatures the peak occurs earlier.
