Overview
Calcium silicate board is the core industrial insulation product for the sugar mills of Hardoi and Sitapur, the Panki thermal power area of Kanpur, and the chemical and beverage plants of Unnao and Barabanki. Wedge Industries Limited supplies Wedge CalSil650LD low-density boards and matching pipe sections, cut and finished at its Faridabad works, plus high-density fire-rated grades for fire doors and partitions.
The board is rigid and self-supporting, so it needs no wire mesh on flat surfaces, holds its thickness under cladding and does not slump on vertical boiler walls. It is inorganic, non-combustible and asbestos-free, manufactured to ASTM C533.
Calcium silicate board specifications — Wedge CalSil650LD
| Property | Value |
|---|---|
| Bulk density | 230 kg/m³ (±10 %) or 250 kg/m³ (±10 %) |
| Maximum service temperature | 650°C (higher-temperature grades to 1000°C on request) |
| Thermal conductivity | ≤0.060 W/m·K (230) · ≤0.062 W/m·K (250) |
| λ at 200°C / 371°C / 538°C | ≤0.056 · ≤0.0923 · ≤0.1002 W/m·K (Wedge CalSil650LD) |
| Compressive strength | ≥0.50 MPa (230) · ≥0.75 MPa (250) |
| Flexural strength | ≥0.30 MPa (230) · ≥0.45 MPa (250) |
| Linear shrinkage | ≤2 % |
| Slab sizes | Length 100–600 mm · width 100–300 mm · thickness 30–100 mm |
| Pipe sections | Same thickness range; inside diameter to pipe bore |
| Tolerances | Length ±2 mm · width ±2 mm · thickness ±1.5 mm |
| Standard | ASTM C533; asbestos-free, non-combustible |
Full technical data sheet, standards compliance and test certificates are supplied with the quotation.
Calcium silicate board price in Lucknow
Indicative Indian market ranges published by Wedge: standard boards ₹25–45 per sq ft, premium ₹45–70, high-density ₹55–90 and fire-rated ₹60–100+ per sq ft (approx. $0.28–1.14 per sq ft at ₹88/$). Insulation-grade slabs and pipe sections are quoted per piece by thickness and bore. Send the equipment list or pipe schedule for a delivered price to Lucknow, Kanpur, Hardoi, Unnao, Barabanki or Agra.
Applications in Lucknow and the region
- Boiler walls, headers and steam-line insulation at sugar mills (Hardoi, Sitapur, Barabanki)
- Furnace and heat-treatment backing insulation in Kanpur foundries and engineering works
- Pipe sections for steam and thermic-fluid lines in chemical, leather and beverage plants (Unnao)
- Fire-door cores and fire-rated partitions in Lucknow hospitals, hotels and high-rise buildings
- Bakery, oven and dryer insulation at food plants in Sandila
Installation and specification notes
Boards are fixed with stud pins or banding and finished with aluminium or GI cladding; joints are staggered and sealed with calcium silicate paste (W-CSP grades). Pipe sections are supplied in half-shells and banded. Wedge cuts boards to size and can supply a plant walk-through to list damaged insulation before quoting a paid repair pilot.
Supply and delivery across the Lucknow – Kanpur – Agra belt
Wedge Industries Limited is building a regional sales, estimating and stock base for Lucknow, Hardoi, Sandila, Kanpur, Unnao, Barabanki and Agra. Ceramic fibre and calcium silicate in proven sizes are part of the regional opening stock; cutting and finishing is done at Faridabad. Bulk panels and large board orders can be dispatched direct from the manufacturing works to site where that is cheaper; consolidated deliveries run on fixed days to Lucknow, Kanpur, Unnao and Barabanki.
Typical buyers in this region: sugar mills in Hardoi and Sitapur, food and consumer-goods plants in Sandila and Barabanki, tanneries and process units in Unnao, foundries and engineering works in Kanpur, cold stores in the potato belt (Hardoi, Kanpur, Unnao, Farrukhabad, Agra), and MEP, fire and interior contractors on Lucknow hospital, hotel, school and office projects.
Why buy from Wedge Industries Limited
- Manufacturing and finishing in Faridabad (Delhi NCR), with group operations in the UK, Spain and China and exports to 45+ countries.
- One supplier for insulation, passive fire protection, acoustics, boards and refractory repair materials — fewer vendors on the site.
- Technical data sheet, test certificates and a material test certificate issued with every order on request.
- Installation and application support through supervised partner crews for jackets, firestop, acoustic and enclosure work.
- GST invoice, regional delivery and a named estimator for the Lucknow region.
Frequently asked questions
What is the difference between 650°C and 1000°C calcium silicate board?
CalSil650LD is a low-density board (230–250 kg/m³) for boilers, steam lines and equipment up to 650°C. Higher-temperature and high-density grades are used for furnace backing and fire-rated construction; tell us the operating temperature and we will specify the grade.
Can you cut calcium silicate boards and pipe sections to size?
Yes. Boards are cut to size and pipe sections are made to bore at the Faridabad works; send the pipe schedule or equipment drawing.
Is calcium silicate board a replacement for asbestos board?
Yes. It is inorganic, non-combustible and asbestos-free, and is the standard modern replacement for asbestos millboard and pipe insulation.
Do you supply to sugar mills in Hardoi and Sitapur?
Yes. Sugar-mill boilers, headers and steam lines are a primary application in this region; Wedge can survey the plant during the off-season and quote a scoped repair package.
How is the board finished on site?
Under aluminium or GI cladding, with joints sealed using Wedge W-CSP calcium silicate paste. Application crews are available on a supply-and-apply basis.
Related products and pages
- Calcium Silicate Board 650°C — CalSil650LD
- Calcium Silicate Board Price in India
- Calcium Silicate Boards landing page
- Ceramic Fibre Blanket — Lucknow
- All Wedge Lucknow Products
- Full product catalogue
Get a quotation for Calcium Silicate Board & Pipe Sections 650°C / 1000°C in Lucknow, Hardoi, Sandila, Kanpur, Unnao, Barabanki and Agra
Send the quantity, sizes and delivery site and Wedge Industries Limited will quote within 24 hours with a GST invoice and regional delivery.
