1.0.1 This code is formulated to make the water supply engineering design conform to national principles, policies, laws and regulations, unify engineering construction standard, improve engineering design quality, meet customers’ demand for water volume, quality and pressure and to achieve safety and reliability, advanced technology, economy and rationality, convenient management.
1.0.2 This code is suitable for the permanent water supply engineering design of newly-built, expanded or reconstructed cities, towns and industrial areas.
1.0.3 The water supply engineering design shall be mainly based on the approved overall urban planning and specialized water supply planning. The choice of water source, determination of position of water treatment plant, water transmission and distribution pipeline shall accord with the demand of the relevant special planning.
1.0.4 The water supply engineering design shall consider the overall situation, including saving of water resource, water eco-environmental protection and sustainable utilization of water resource, correctly handle the relationship of various water uses and meet the requirement of building the water-saving towns and cities.
1.0.5 The water supply engineering design shall follow the principles of economical using of land and rational using of land resource. The quota of land for the use of construction shall conform to relevant regulations of Construction Standard of Urban Water Supply Engineering Project.
1.0.6 The water supply engineering shall be designed according to the principle of long-term planning, combining short with long term design and attaching importance on short-term design. The service life of short-term design shall be 5~10 years, and that of the long-term design shall be 10~20 years.
1.0.7 The rationally designed service life of the structure of water supply engineering shall be 50 years, and that of the pipeline and special equipment shall be determined according to material and product renewal cycle and through technical and economic comparison.
1.0.8 The water supply engineering design shall adopt effective new technology, process, material and equipment to improve quality of water supply, guarantee safety of water supply, optimize operational management, save energy and resources, and reduce engineering and operational cost on the basis of summarization of the experience of production practices and scientific experiment.
1.0.9 The water supply engineering design shall not only be conducted according to this code, but also shall conform to regulations of relevant current national standards.
The water supply engineering design in such areas as seismic, wet subside loess, frozen soil of many years and other special geological areas shall be done according to current related codes or regulations.
1 General Provisions 1
2 Terms 2
3 Water Supply System 11
4 Design Water Volume 12
5 Water Intaking 14
5.1 Selection of Water Source 14
5.2 Underground Water Intake Structure 14
5.3 Surface Water Intake Structure 17
6 Pump House 21
6.1 General Provisions 21
6.2 Water Absorbing Condition of Pump 21
6.3 Pipeline Flow Speed 22
6.4 Lifting Equipment 22
6.5 Layout of Pump assembly 22
6.6 Layout of Pump House 23
7 Water Transmission and Distribution 24
7.1 General Provisions 24
7.2 Hydraulic Calculation 25
7.3 Pipeline Arrangement and Laying 26
7.4 Pipe Culvert and Affiliated Facility 27
7.5 Regulation and Storage Structure 28
8 Overall Design of Water Works 30
9 Water Treatment 32
9.1 General 32
9.2 Pretreatment 32
9.3 Dosing of Coagulant and Coagulant Aid 33
9.4 Coagulation, Sedimentation and Clarification 34
9.5 Filtering 38
Table 9.5.8 Filtering Speed and Composition of Filtering Material for Filter Tank 39
9.6 De-iron and Demanganization of Ground Water 44
Filter Tank 46
9.7 De-fluorine 46
9.8 Antisepsis 48
9.9 Ozone Water Purifying 51
9.10 Activated carbon adsorption 55
9.11 The stability treatment of the water quality 56
10 The sludge discharging treatment in the water-purifying factory 58
10.1 General Requirements 58
10.2 Technique Process 59
10.3 Adjustment 59
10.4 Concentration 61
10.5 Spin-drier 62
10.6 The treatment and utilization of the sludge cake 64
11 Detecting and controlling 66
11.1 General Requirements 66
11.2 Online detecting 66
11.3 Control 67
11.4 Computer control management system 67
Appendix A Minimum horizontal net space between the sewage 69
Appendix B Minimum vertical net space between the water supply 70
Explanation of Wording in This Code 71
