Glass

Glass Melting:
The glass is passed through Bharatgas flames for one or more of the following reasons:
a. Round off sharp edges
b. Smooth off gob marks or grinding marks
c. Seal cracks
d. Increase surface luster
e. Heating jobs to remove cutting marks

Annealing is done in normally long ovens with the glass traveling through on a steel conveyor belt. Bharatgas is used for direct firing and for finer temperature control.

Glass Annealing:
Annealing glassware after manufacture. The cooling rate is very important because strains will be set up in the glass if it cools at undesired rate.

As seen here re-heating of melted glassware in a special furnace is done before shaping operations. When making complicated shapes the glassware may have to be reheated several times to keep it malleable. LPG is generally used because the firing rate is not very high and combustion must be free of carbon.

In the summer heat when you reach for a thirst quencher, remember Bharatgas has gone into making the bottles that hold these great refreshers.