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GB/T 34355-2017Steam and hot water boiler chemical cleaning regulation (English PDF)

蒸汽和热水锅炉化学清洗规则

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 14, 2017

Implementation date

May 1, 2018

Scope

GB/T 34355-2017 is the English-translated version of 蒸汽和热水锅炉化学清洗规则.

GB/T 34355-2017 is the Chinese standard "Steam and hot water boiler chemical cleaning regulation".

Its scope clause reads: This standard specifies the boiler cleaning units and personnel, cleaning programs and cleaning media, metal corrosion prevention and control of chemical cleaning, clear Washing technology, chemical monitoring of the cleaning process, cleaning quality, cleaning safety and disposal of waste discharge requirements.

This standard applies to fixed steam boiler and hot water boiler (hereinafter referred to as boiler) in the non-operating state of the water vapor space chemistry Cleaning. Its clauses include terms and definitions.

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Document preview — GB/T 34355-2017

National Standard of the People's Republic of China

ICS: 27.060.01
Classification: J 98

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 basic requirements
5 technical requirements
6 industrial boiler cleaning and its quality requirements
8 Safety Requirements
9 cleaning waste discharge and handling
Appendix A (Normative) Pipe cutting and determination of sediment (scale) volume
Appendix B (Normative) Metal corrosion rate and inhibitor corrosion inhibition efficiency measurement
Appendix C (informative) commonly used cleaning agent quality standards and the amount calculated
Appendix D (Informative) Pickling heating method
Appendix E (Normative) Industrial boiler chemical cleaning process and its requirements
Appendix F (Informative) Chemical Analysis Methods for Boiler Cleaning
Appendix G (informative) Identification of types of fouling
Appendix H (Informative) Power Station boiler chemical cleaning media selection
Appendix I (Normative) Boiler cleaning process and control
Appendix J (Normative) Determination of residual scale and cleaning descaling

1 Scope

This standard specifies the boiler cleaning units and personnel, cleaning programs and cleaning media, metal corrosion prevention and control of chemical cleaning, clear

Washing technology, chemical monitoring of the cleaning process, cleaning quality, cleaning safety and disposal of waste discharge requirements.

This standard applies to fixed steam boiler and hot water boiler (hereinafter referred to as boiler) in the non-operating state of the water vapor space chemistry

Cleaning.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 4334 metals and alloys corrosion of stainless steel intergranular corrosion test methods

GB 8978 Integrated Wastewater Discharge Standard

GB/T 15970.5 metal and alloy corrosion stress corrosion test - Part 5. Preparation and application of C-ring sample

GB 50273 Boiler Installation Construction and Acceptance Specification

DL/T 523 Chemical Cleaning Corrosion Inhibitor Application Performance Evaluation Index and Test Method

DL/T 1151 (all sections) Thermal power plant scale and corrosion products analysis

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Boiler chemical cleaning

The use of chemical agents to remove boiler water vapor system in a variety of deposits, cleaning the metal surface, the formation of anti-corrosion corrosion protection film cleaning method.

3.2 Clean system

From the cleaning of equipment and temporary systems (dispensing boxes, temporary cleaning of pipes, valves, heating devices, temperature measuring devices, pressure measuring device

Home, monitor and cleaning pump, etc.) system.

3.3 Cleaning process parameters

Cleaning process to be controlled by the concentration of cleaning fluid, temperature, pH, flow rate and cleaning time and other parameters.

3.4 Cleaning agent

Cleaning agents for boiler cleaning generally refer to hydrochloric acid, citric acid, ethylenediaminetetraacetic acid (EDTA), glycolic acid, formic acid, nitric acid, hydrogen

Fluoric acid and so on.

3.5 Corrosion inhibitor

A very small amount of cleaning can significantly reduce the corrosion rate of the cleaning fluid on the metal, and does not reduce the cleaning effect of a class of agents.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 41 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 16508.8-2022Shell boilers—Part 8: Operation

Similar standards

GB/T 18750-2022|GB/T 30580-2022|GB/T 34352-2017|GB/T 34552-2017|GB/T 13922-2011|GB/T 14811-2026

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