GB/T 29044-2012 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 29044-2012 | English | 245 |
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GB/T 29044-2012: Water quality for heating and air conditioning systems---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT29044-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.01
P 45
Water quality for heating and air conditioning systems
采暖空调系统水质
ISSUED ON: DECEMBER 31, 2012
IMPLEMENTED ON: SEPTEMBER 01, 2013
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements ... 6
5 Inspection methods ... 11
Annex A (informative) Water quality testing items and testing frequency ... 14
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by Ministry of Housing and Urban-Rural
Development of the People's Republic of China.
This Standard shall be under the jurisdiction of National Technical Committee
on HVAC and Purification Equipment of Standardization Administration of China
(SAC/TC 143).
The drafting organizations of this Standard: China Academy of Building
Research, Beijing Kejingyuan Technology Co., Ltd., Beijing Ruiwater
Technology Co., Ltd., Heating Radiator Committee of China Construction Metal
Structure Association, Institute of Artificial Environment and Control, Zhongkai
University of Agricultural Engineering, Jilin Provincial Architectural Design
Institute Co., Ltd., China Aviation Planning Construction Development Co., Ltd.,
China Institute of Architecture Design and Research Institute of Mechanical and
Electrical Professional Design, Shaanxi Provincial Boiler and Pressure Vessel
Inspection Institute, Lanzhou Jiaotong University, Tsinghua University,
Guangzhou Key Public Construction Project Management Office, Corrosion
and Protection Center, School of Materials Science and Engineering, University
of Science and Technology Beijing; Environmental and Health-Related Product
Safety Institute, Chinese Center for Disease Control and Prevention; Modern
Design Group East China Architectural Design and Research Institute Co., Ltd.,
School of Municipal Environmental Engineering, Harbin Institute of Technology,
Guangzhou Yuexin Engineering Technology Co., Ltd., Dongguan Keda
Electromechanical Equipment Co., Ltd., Sende (China) HVAC Equipment Co.,
Ltd., Beixin Group Building Materials Co., Ltd., Reteg (China) Co., Ltd., Ningbo
Ningxing Golden Sea Heating Equipment Co., Ltd., Wanda Group Co., Ltd., Yile
Group, Yishapu Jintaige Radiator (Beijing) Co., Ltd., Henan Qianfeng Radiator
Co., Ltd., Shenzhen Haichuan Industrial Co., Ltd., Beijing Zhongyu Huateng
Energy Conservation and Environmental Protection Technology Co., Ltd.
Main drafters of this Standard: Wang Chuanfa, Ge Jing, Huang Wei, Ge Xiuling,
Song Weimin, Xiao Yuerong, Dong Zhongcheng, Yu Aoyuan, Ding Lixing, Wang
Feng, Song Xiaochun, Ma Tianbang, Wang Sanfan, Qiu Dong, Li Xiaogang,
Chen Xiping, Xin Junzhe, Yang Guang, Guo Dahai, Hui Qun, Guo Zhangeng,
Chen Guohui, Liu Xiaotian, De Luka, Wen Huitong, Huang Haibo, Guan
Zhonghai, Wang Xumao, Wang He, Huang Yongheng, Hou Yingbing.
Water quality for heating and air conditioning systems
1 Scope
This Standard specifies the terms and definitions, requirements and inspection
methods for water quality for heating and air conditioning systems.
This Standard is applicable to circulating cold water system for central air
conditioning and circulating cold water system, circulating water system for
direct-evaporative cooling and indirect-evaporative cooling, as well as central
heating circulating hot water system with water temperature not exceeding
95°C.
This Standard is inapplicable to air conditioning humidification circulating water
system.
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 1576, Water quality for industrial boilers
GB/T 5750.2, Standard Examination Methods for Drinking Water - Collection
and Preservation of Water Samples
GB/T 6904, Water used in industrial circulating cooling system and boiler -
Determination of pH
GB/T 6908, Analysis of water used in boiler and cooling system -
Determination of electrical conductivity
GB/T 11899, Water quality - Determination of sulfate - Gravimetric method
GB/T 11911, Water quality - Determination of iron and manganese - Flame
atomic absorption spectrometric method
GB/T 11914, Water quality - Determination of the chemical oxygen demand
- Dichromate method
GB/T 12157, Water for industrial circulating cooling system and boiler -
pressure of the heating and air conditioning circulating water system
3.2 cycle of concentration
the ratio of the salt content of the circulating water to the make-up water of the
open circulating cooling water system
3.3 indirect open circulating cooling water system for central air
conditioning
the central air conditioning circulating cooling water system that the circulating
cooling water and the cooled medium indirectly transfer heat, and the circulating
cooling water is in direct contact with the atmosphere to dissipate heat
3.4 indirect closed circulating cooling water system for central air
conditioning
the central air conditioning circulating cooling water system that the circulating
cooling water and the cooled medium indirectly transfer heat, and the circulating
cooling water and the cooling medium are indirect heat transfer
3.5 circulating water system for direct-evaporative cooling
the circulating cooling water system that cools and humidifies air through the
evaporation of water
3.6 circulating water system for indirect-evaporative cooling
the circulating cooling water system that cools the air through the evaporation
of water, and the air is not humidified when it is cooled
4 Requirements
4.1 Indirect open circulating cooling water system for central air
conditioning
4.1.1 Water quality for indirect open circulating cooling water system for central
air conditioning shall comply with the provisions of Table 1.
Table 1 – Water quality requirements for indirect open circulating
cooling water system for central air conditioning
4.7 Water quality for central direct heating system
4.7.1 Water quality for central direct heating system shall meet the requirements
of GB/T 1576. Water quality for make-up water shall meet the requirements of
4.3.1 in CJJ 34-2010.
4.7.2 When the water quality of the make-up water exceeds this Standard, the
make-up water shall be treated accordingly.
4.7.3 The central direct heating system shall set up the corresponding
circulating water quality control device.
5 Inspection methods
5.1 Sampling
5.1.1 Selection of sampling points
5.1.1.1 The sampling point of the circulating cooling water system for central air
conditioning shall be set at the water inlet of the condenser.
5.1.1.2 The sampling point of the circulating cold water system for central air
conditioning shall be set at the water inlet of the evaporator.
5.1.1.3 The sampling point of the heating circulating water system shall be set
at the water inlet of the heat exchange equipment.
5.1.1.4 The sampling point of the evaporative circulating cooling water system
shall be set at the cooling tower catchment pan.
5.1.1.5 The sampling point of make-up water shall be set behind the metering
water meter of the make-up water main pipe.
5.1.2 Sampling requirements
5.1.2.1 Sampling containers for general testing items can be colorless rigid
glass bottles or polyethylene plastic bottles. They shall be washed before use.
The glass bottle can be soaked with lotion. Then use tap water and distilled
water to clean it for later use. The polyethylene bottle can be soaked with 10%
hydrochloric acid solution. Then use tap water and distilled water to clean it for
later use.
5.1.2.2 Dedicated sample storage containers shall be used to determine
dissolved oxygen and biochemical oxygen demand. The sample container of
inorganic item can choose high-density polyethylene or hard glass container.
5.1.2.3 When collecting water samples, water shall be drained for a few minutes
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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