Standard No.:	GB/T 1576-2018
English Name:	Water quality for industrial boilers
Chinese Name:	工业锅炉水质
Chinese Classification:	J75    Heat-exchange equipment
Professional Classification:	GB    National Standard
ICS Classification:	27.060.30 27.060.30    Boilers and heat exchangers 27.060.30
Issued by:	SAIC AND SAC
Issued on:	2018-05-14
Implemented on:	2018-12-1
Status:	valid
Superseding:	GB/T 1576-2008 Water quality for industrial boilers
Language:	English
File Format:	PDF
Word Count:	11000 words
Price(USD):	270.0
Delivery:	via email in 1 business day

1 Scope 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. 3.1 raw water the source water of the boiler make-up water 3.2 softened water

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Water quality standard 5 Methods for water quality analysis Annex A (Normative) Determination of dissolved oxygen (oxygen electrode method) Annex B (Normative) Determination of dissolved solids (gravimetric method) Annex C (Normative) Indirect determination of dissolved solids in boiler water Annex D (Normative) Determination of phosphate (phosphorus molybdenum blue colorimetry) Annex E (Normative) Determination of alkalinity (acid-base titration) Annex F (Normative) Determination of sulphite (iodometric method)