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Chapter 14 Boilers - Pearson

• Low-pressure boilers are designed to withstand a maximum of 15 psig steam or a M.A.W.P. 160 psig water. The boilers can be classified according to the following criteria. According to flow of water and hot gases: 1. Water tube. 2. Fire tube. In water tube boilers, water circulates through the tubes and hot

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Chapter 10: Boilers and Pressure Vessels, California

remove particulates and dissolved materials in the boiler water and to control boiler water chemistry. If contamination or boiler water treatment chemical over-addition exist, both are reduced by a surface blowdown. Scum blowdowns are used to remove surface scum. Bottom blowdowns are used to control the amount of sludge in the boiler water.

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Boiler Safety Technical Supervision Administration Regulation

3 (3) Hot-water boiler with only tap water pressurization and t≤95℃; (4) Gas-phase or liquid-phase organic heat transfer material boiler, Q≤0.1MW. Note 1-3: p is the rated working pressure of the boiler; for the steam boiler, it represents the rated steam pressure; for the hot-water boiler, it represents the rated water-delivery pressure; for the organic heat transfer material boiler

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Phase I Final Rule and Technical Development Document of

Pressure Relief Device Inspection

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DRAFT BOILER/FEEDWATER GUIDELINES

Well water can have as high as 1,250 ppm of dissolved solids. 1,000,000 pounds of this water will have 1,250 pounds of solids. A 100 hp boiler vaporizing 3,450 pounds of this as make-up water could leave 4.3 pounds of solids behind. 3.5.4 Suspended solids are insoluble …

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CHAPTER TWO: Boiler Operation Maintenance & Safety Study …

CHAPTER TWO: Boiler Operation Maintenance & Safety Study Guide

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(EXCERPTS FROM BOILER, PRESSURE VESSEL AND PIPING …

• Boilers less than 400 psi – manual test every 6 months, annual pressure test • Boilers greater than 400 psi – Pressure test every three years • High temp. hot water boilers – annual pressure test • Low pressure boilers (15 psi) – manual test quarterly, annual pressure test before heating season 35

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Considerations for High Pressure Boiler Chemical Treatment

Water-Tube Boilers Drum Pressure • (kg/cm²) • 0 - 21 • 22 - 31 • 32 - 42 • 43 - 52 • 53 - 63 • 64 - 70 • 71 - 105 • Iron (ppm Fe) 0.10 0.05 0.03 0.025 0.02 0.02 0.01 Copper (ppm Cu) 0.05 0.025 0.02 0.02 0.015 0.015 0.01 Hardness (ppm CaCO 3) 0.30 0.30 0.20 0.20 0.10 0.05 0.0

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