1.0.1 This code is formulated with a view to save energy, protect environment, promote production, improve people's lives, develop district heating services of China and improve the level of engineering design.
1.0.2 This Code is applicable to the design of the following heat network with heating hot water in design pressure of less than or equal to 2.5MPa and in design temperature of less than or equal to 200℃; or heating steam in design pressure of less than or equal to 1.6MPa and in design temperature of less than or equal to 350℃:
1 The district heating network managed by heating enterprises, based on heat source of heat power plant or district boiler room, which is heating for multiple users and connecting from the heat source to the heating station;
2 The process system design of newly-build, extended or reconstructed pipeline, booster pump station and heating station of district heating network
1.0.3 The district heating network design shall comply with the requirements of urban planning, so that state-of-art technology, economic feasibility and safe application may be accomplished, and the esthetic appearance therein shall be noticed.
1.0.4 When designing district heating network in the earthquake, collapsible loess and expansive soil regions, not only shall this Code be carried out, but also shall current "Code for Seismic Design of Outdoor Water Supply Sewerage Gas and Heating Engineering" TJ 32, "Specifications for the Design of Construction in Wet and Depressive Loess Areas" GBJ 25, "Technical Specifications for Construction Ground in Expanding Soil Areas" GBJ 112 and relevant national compulsive standards be met.
1. General 2. Terms and Symbols 2.1 Terms 2.2 Symbols 3. Heat Consumption 3.1 Heat load 3.2 Annual heat consumption 4. Heat Supply Media 4.1 Selection of heat supply media 4.2 Parameters of heat supply media 4.3 Water quality criteria 5. Type of Heat Supply Network 6. Heat Supply Regulation 7. Hydraulic Calculation 7.1 Design flow 7.2 Hydraulic calculation 7.3 Parameters in hydraulic calculation 7.4 Pressure working condition 7.5 Selection of water pump 8. Pipe Network Arrangements and Laying 8.1 Pipe network arrangement 8.2 Laying of pipeline 8.3 Pipeline material and joint 8.4 Thermal compensation 8.5 Accessories and facilities 9. Stress and Acting force Calculation of Pipelines 10. Booster Pumping Station and Heating station 10.1 General rules 10.2 Booster pumping station 10.3 Heating station with hot water heating network 10.4 Steam heating network and stations 11. Thermal Insulation and Anti-corrosion Coating 11.1 General rules 11.2 Insulation calculation 11.3 Insulation structure 11.4 Anticorrosion coating 12. Power Supply/Distribution and Lighting 12.1 General rules 12.2 Power supply and distribution 12.3 Lighting 13. Heat Engineering Detection and Control 13.1 General rules 13.2 Parameter detection and control of heat source and heating network 13.3 Parameter detection and control of relay pump station 13.4 Parameter detection and control of heating station 13.5 Heating network dispatching automation Explanation of Wording in this Code
Standard
CJJ 34-2002 Design Code of District Heating Network (English Version)
1.0.1 This code is formulated with a view to save energy, protect environment, promote production, improve people's lives, develop district heating services of China and improve the level of engineering design.
1.0.2 This Code is applicable to the design of the following heat network with heating hot water in design pressure of less than or equal to 2.5MPa and in design temperature of less than or equal to 200℃; or heating steam in design pressure of less than or equal to 1.6MPa and in design temperature of less than or equal to 350℃:
1 The district heating network managed by heating enterprises, based on heat source of heat power plant or district boiler room, which is heating for multiple users and connecting from the heat source to the heating station;
2 The process system design of newly-build, extended or reconstructed pipeline, booster pump station and heating station of district heating network
1.0.3 The district heating network design shall comply with the requirements of urban planning, so that state-of-art technology, economic feasibility and safe application may be accomplished, and the esthetic appearance therein shall be noticed.
1.0.4 When designing district heating network in the earthquake, collapsible loess and expansive soil regions, not only shall this Code be carried out, but also shall current "Code for Seismic Design of Outdoor Water Supply Sewerage Gas and Heating Engineering" TJ 32, "Specifications for the Design of Construction in Wet and Depressive Loess Areas" GBJ 25, "Technical Specifications for Construction Ground in Expanding Soil Areas" GBJ 112 and relevant national compulsive standards be met.
Contents of CJJ 34-2002
1. General
2. Terms and Symbols
2.1 Terms
2.2 Symbols
3. Heat Consumption
3.1 Heat load
3.2 Annual heat consumption
4. Heat Supply Media
4.1 Selection of heat supply media
4.2 Parameters of heat supply media
4.3 Water quality criteria
5. Type of Heat Supply Network
6. Heat Supply Regulation
7. Hydraulic Calculation
7.1 Design flow
7.2 Hydraulic calculation
7.3 Parameters in hydraulic calculation
7.4 Pressure working condition
7.5 Selection of water pump
8. Pipe Network Arrangements and Laying
8.1 Pipe network arrangement
8.2 Laying of pipeline
8.3 Pipeline material and joint
8.4 Thermal compensation
8.5 Accessories and facilities
9. Stress and Acting force Calculation of Pipelines
10. Booster Pumping Station and Heating station
10.1 General rules
10.2 Booster pumping station
10.3 Heating station with hot water heating network
10.4 Steam heating network and stations
11. Thermal Insulation and Anti-corrosion Coating
11.1 General rules
11.2 Insulation calculation
11.3 Insulation structure
11.4 Anticorrosion coating
12. Power Supply/Distribution and Lighting
12.1 General rules
12.2 Power supply and distribution
12.3 Lighting
13. Heat Engineering Detection and Control
13.1 General rules
13.2 Parameter detection and control of heat source and heating network
13.3 Parameter detection and control of relay pump station
13.4 Parameter detection and control of heating station
13.5 Heating network dispatching automation
Explanation of Wording in this Code
