Indian Float Glass Plant MEP — IS 2835 + EN 572 + ASTM C1036 + ICG + CPCB + BEE PAT
An 800 t/day Indian float glass plant demands ₹1,842 Cr MEP capex with raw-material + furnace (oxy-fuel or air-fuel) + tin float bath + lehr annealing + oxygen plant + bag-house + SCR. IS 2835 + EN 572 + ASTM C1036 + ICG + CPCB + IGMA govern. Three failures: air-fuel furnace at 12.5 GJ/t vs oxy-fuel 5.5 (55 % saving, 4-6 yr ROI) Indian industry slow to convert, furnace bottom cooling without continuous monitoring (catastrophic discharge risk), lehr annealing profile not per IS 2835 + EN 572 causing stress fracture in transit.
Indian glass float plant framework
India glass industry (Saint-Gobain Sezal + Glaverbel + AGC Asahi India + GSC Glass + Hindusthan National Glass + Borosil + Triveni Glass) operates float glass + container glass + special glass. Float plants make 4-12 mm soda-lime float glass at 700-1100 t/day. Standards stack — IS 2835 (float glass) + IS 4843 (architectural) + EN 572 (float glass) + ASTM C1036 + ICG (International Commission on Glass) + Indian Glass Manufacturers Association IGMA + worldcement + IS 13779 (battery for emergency cooling) + IBR.
800 t/day float glass plant MEP scope
| Process unit | Function | Capacity | Capex (₹ Cr) |
|---|---|---|---|
| Raw-material handling + batch | silica + soda + dolomite + limestone | — | 85 |
| Furnace (oxy-fuel or air-fuel) | melting at 1550°C | 800 t/day | 920 |
| Forming bath (tin float) | — | — | 185 |
| Lehr (annealing) | controlled cooling 590°C → 60°C | — | 125 |
| Cutting + dispatch | online cutting + edge-finish | — | 85 |
| Cooling water + cooling tower | — | CTI | 22 |
| Oxygen plant (where oxy-fuel) | VPSA or cryogenic | 120 t/day O2 | 165 |
| Bag-house + ESP (furnace flue) | PM < 30 + SO2 + NOx | CPCB | 85 |
| SCR + DeNOx | NOx < 600 mg/Nm³ | CPCB Glass 2022 | 45 |
| Furnace electrodes + boosting | electric melting boost | — | 125 |
| Total float glass plant | — | — | 1,842 |
Three Indian float glass plant MEP failures
- Air-fuel furnace without oxy-fuel conversion — air-fuel at 12.5 GJ/t-glass; oxy-fuel at 5.5 GJ/t = 55 % saving but capex ₹165 Cr for oxygen plant. ROI 4-6 years. Indian glass industry slow to convert.
- Furnace bottom cooling without continuous monitoring — refractory failure at furnace bottom = catastrophic 1550°C glass discharge. Specify continuous thermocouple + IR camera grid + emergency cooling water reserve per ICG Bulletin.
- Lehr cooling profile not optimised — annealing must follow controlled 590°C → 60°C profile to relieve stress. Wrong profile causes glass-stress fracture in transit. Specify per IS 2835 / EN 572 + CG simulation.
- IS 2835 + IS 4843 + IS 14900 — Indian Float Glass Standards.
- EN 572 series + ASTM C1036 — Float Glass.
- ICG International Commission on Glass Best Practice 2024.
- IGMA Indian Glass Manufacturers Association Production Standards 2024.
- CPCB Glass Industry Emission Norms 2022.
- EU BAT BREF Glass 2013.
- worldcement + Glass International Magazine — Best Practice 2024.
- BEE PAT Cycle VII Glass Sector Booklet 2024.