Is the body exposed to an open flame during the cremation process?

Yes. The cremation process involves subjecting the body to high heat and constant flames that are produced by a furnace that is powered by natural gas, propane, or diesel fuel. The temperature inside the cremation chamber is maintained at a constant temperature between 1400 to 1800 degrees Fahrenheit. The intense heat of the flames vaporizes all organic matter and leaves only mineral fragments that resemble dry bone.