Chromized tubes and Panels

Our chromizing facility can supply tubes and panels in different lengths and widths. We have applied chromized studs on panels built by most major manufacturers.  In Canada we have an agreement with Lockerbie & Hole where they supply the panels and Sage provides the application of the Chromized Studs™. Their performance in service is outstanding, lasting at least twice as long as carbon steel studs.

The panel above is pictured after 5 years in a boiler operating at 1200 psi. The upper portion has a density of 72 studs/ft whereas the studs on the lower portion were welded in the field after the panels were assembled and the density is only 48 studs/ft.

The picture below shows clearly how important it is to have highest possible density. At the transition line between high/low density the results are obvious.

The most visible benefit granted by chromized studs is seen when the panels need restudding. Because they wear in an absolutely even manner their repair restores the original conditions of the panel and that means lower repair frequency. More important though is that the tubes will be always protected by the frozen layer fulfilling our claim that properly maintained studded panels do retire without replacement. 

Below we show a portion of a smelt spout panel after 5 years in use before and after repair.

In the past, issues have been raised regarding the Chromium content at the interface between the stud and the tube and that led us to develop a special type of stud with no Chromium at the tip thus ensuring a chromium free interface.

Floor panels can be welded with a modified stud design.

Panels supplied with our Chromized Studs™ enjoy a long term extended warranty where all repairs in the studded zone are provided at fixed price in a fixed time window of three days. 

AVAILABLE DENSITY PATTERNS

Stud density plays a major role in the corrosion protection of panels. High density can always dissipate enough heat from the smelt to grant an effective "frozen layer" and that is what ultimately protects the  tubes.

Our company can provide different patterns but we do recommend either 80 or 90 studs/ft depending on the operating pressure of the boiler. Both patterns are shown below.

On the left the pattern 4x4 with 80 studs per foot and on the right 4x5 with 90 studs per foot. Compare the distance between the base of the studs. Below a close view of denser pattern

We can also provide diffusion of other elements to meet specific needs.

For specific enquiries please contact us.