Calcium silicate insulation
Hysil board, block and pipe sections — a rigid insulating material for back-up layers and hot pipework, where fibre would compress and a castable would add mass.
3 lines · stocked in Ahmedabad
The lines
Rigid where fibre is not
Calcium silicate is a formed, load-bearing insulation. It holds its thickness under the weight of the lining above it, which is what makes it a back-up layer rather than a hot-face one, and it can be cut and fitted to a dimension on site. Where a back-up layer has to carry load or hold a gap open, fibre compresses and calcium silicate does not.
Board, block and pipe section
Board is the general back-up form behind brick or castable. Block is the thicker section for the same duty. Pipe sections are pre-formed half-shells for lagging hot pipework and ducting, which is where most of the heat loss on a plant that is otherwise well lined actually goes.
Layering is where it pays
A dense hot face chosen for the duty, with an insulating layer behind it chosen for the heat it stops, almost always beats a single-material lining on shell temperature and on fuel. The hot face survives the process; the back-up layer keeps the heat in. Specifying both together is the difference between a lining that works and a lining that works cheaply.
Where this is the wrong answer
Hot-face duty, contact with slag or molten metal, and wet or condensing service unless the grade is confirmed for it.
Tell us the duty, not the product code
Operating temperature, atmosphere, what contacts the lining, thermal cycling and the existing lining’s failure history — send those and we will come back with a grade and a reason for it.