Water Handbook - Preboiler & Industrial Boiler Corrosion

The alkalinity of boiler water should be sufficiently high enough to protect shell and plates against acidic corrosion, but not high enough to produce carryover. A minimum value for alkalinity for adequate protection is 200 PPM. High boiler alkalinity, which is in excess of 700 PPM, should be avoided. Values higher than this can lead to embrittlement of the steel. Phosphates. Phosphates are used to react with

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Water Handbook - Preboiler & Industrial Boiler Corrosion

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Steam Production When heat is added to water, its temperature rises at a rate of 0.56°C (1°F) for each heat input of 2.095 kJ/kg (1 Btu/lb) If we take water at 0°C (32°F) and we

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Feed-water purity requirements therefore can vary widely. A low-pressure fire-tube boiler can usually tolerate high feed-water hardness with proper treatment while virtually all impurities must be removed from water used in some modern, high-pressure boilers.

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Recommended ABMA & ASME Boiler Water Limits Boiler Water

In addition, hardness salts can precipitate from the boiler water to form sludge and eventually scale, which deposits on the internal surfaces of the boiler. utilizing formulation based on standards RECOMMENDED ABMA & ASME BOILER WATER LIMITS* DRUM OPERATING PRESSURE (psig) 0-300 301-450 451-600 601-750 751-900 901-1000 1001-1500 1501

Water Specification for low to medium pressure boiler

Boiler Pressure: 0-20 Barg: 21 o 39 Barg: 40 59 Barg: Total hardness as CaCo3 (For filtered sample), mg/ltr, Not Detectable: Not Detectable: Not Detectable: Total alkalinity as CaCo3, mg/ltr, Max: 700: 500: 300: Caustic alkalinity as CaCo3, mg/ltr, Max: 350: 200: