small notes on boiler, THIS IS THE SMALL PPT ON BOILER , THE BOILER IS OF 2TYPES 1.FIRE TUBE 2.WATER TUBE FIRE TUBE: FIRE IS SURROUNDED BY WATER AND MAX PRESS IS 17.5KG/CM2, 12TONN/HR WATER TUBE: WATER IS SURROUNDED BY FIRE AND IS USED IN MAINLY IN POWER PLANTS AND HIGH USED STEM PROCESS INDUSTRIES..