This standard specifies the water quality requirements for boiler feed water, boiler water, back water and make-up water of industrial boilers in operation.
This standard is applicable to fixed steam boilers, multifunctional boilers and hot water boilers with rated outlet steam pressure less than 3.8 MPa and with water as medium.
This standard is not applicable to boilers made of aluminum.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 6903 Analysis of water used in boil and cooling system - General rule
GB/T 6904 Water used in industrial circulating cooling system and boiler - Determination of pH
GB/T 6907 Analysis of water used in boil and cooling system - The sampling method of water
GB/T 6908 Analysis of water used in boil and cooling system - Determination of electrical conductivity
GB/T 6909 Analysis of water used in boiler and cooling system - Determination of hardness
GB/T 6913 Analysis of water used in boiler and cooling system - Determination of phosphate
GB/T 12145 Quality criterion of water and steam for generating unit and steam power equipment
GB/T 12151 Analysis of water used in boiler and cooling system - Determination of turbidity - Formazine turbidity
GB/T 12152 Water for boiler and cooling system-Determination of mineral oil
GB/T 12157 Water for industrial circulating cooling system and boiler - Determination of dissolved oxygen
GB/T 13689 Water for industrial circulating cooling system and boiler - Determination of copper
GB/T 14415 Water for industrial circulating cooling system and boiler - Determination of solids matter
GB/T 14427 Analysis of water used in boil and cooling system - Determination of iron
GB/T 15453 Water for industrial circulating cooling system and boiler - Determination of chlorine
GB/T 15893.1 Industrial circulating cooling water - Determination of turbidity - Diffused radiation method
GB/T 29340 Analysis of water used in boil and cooling system - Determination of chloride - Ammonium thiocyanate titration method
DL/T 502.1 Analytical methods of steam and water in power plants - Part 1: General rule
DL/T 502.25 Analytical methods of steam and water in power plants - Part 25: Determination of iron (Spectrometric method using sulphosalicylic acid)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
