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IAPWS TGD4-11(2015)
IAPWS Technical Guidance Document: Phosphate and NaOH treatments for the steam-water circuits of drum boilers of fossil and combined cycle/HRSG power plants
July 2015

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This document contains Cycle Chemistry Guidelines providing feedwater, boiler water and steam targets and limits for phosphate and caustic / sodium hydroxide (NaOH) treated drum boilers in fossil and combined cycle / HRSG power plants (PT and CT). Customization for each type of plant is provided.

Revision History

This Technical Guidance Document is the product of the Working Group "Power Cycle Chemistry" (PCC) of the International Association for the Properties of Water and Steam (IAPWS).

This page updated September 19, 2016

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