1.0.1 This standard is formulated with a view to conform to the city gas engineering design requirements for safe production, reliable supply, reasonable economical efficiency and environmental protection.
1.0.2 This standard is applicable to the design of new, expanded and renovated city gas engineering to supply fuel gas for domestic and commercial use, production of industrial enterprise, heating, ventilation and air conditioning in cities, towns and residence communities, etc..
Note: 1 This standard is not applicable to the long-distance gas transmission pipeline engineering in front of city gate.
2 This standard is not applicable to the design of gas engineering by industrial enterprises themselves for technological design and the gas quality does not conform to the quality requirements of this standard. But the gas engineering by industrial enterprises themselves for technological process and the gas quality conforms to this standard can be designed according to this standard. If the gas for self-use in industrial enterprises is supplied to residents, the gas quality and engineering design shall comply with this standard.
3 This standard is not applicable to the design of gas appliances used in ships, river steamers, railway vehi-cles, automobiles, etc..
1.0.3 During the design of the city gas engineering, the effective new process, technology, materials and equipment should be positively used based on successful experiences in production, construction and scientific experiments in order to ensure the technique is the latest and most economical and reasonable.
1.0.4 The city gas engineering planning and design shall comply with Chinese energy policy. The city gas engineering should be designed in accordance with city master plan as well as energy planning, environmental protection planning and fire-fighting planning, etc..
1.0.5 The design of city gas engineering shall comply not only with the requirement stipulated in this code, but also those in current relevant ones of the nation.
1 General Provisions
2 Terms
3 Gas Consumption and Quality
3.1 Gas Consumption
3.2 Gas Quality
4 Gas Manufacture
4.1 General Requirement
4.2 Gas Manufacture by Coal Carbonization
4.3 Gas manufacture by coal gasification
4.4 Gas Manufacture by Low Pressure Intermittent Cyclic Catalytic Cracking of Heavy Oil
4.5 Gas Manufacture by Low Pressure Intermittent Cyclic Catalytic Cracking of Light Oil
4.6 Gas Manufacture by Low Pressure Intermittent Cyclic Catalytic Cracking of Liquefied Petroleum Gas
4.7 Gas Manufacture by Low Pressure Intermittent Cyclic Catalytic Reforming of Natural Gas
4.8 Peak Shaving
5 Purification
5.1 General requirement
5.2 Gas condensation and cooling
5.3 Gas discharging and transmitting
5.4 Removal of tar fog
5.5 Ammonia removal by sulfuric acid absorption method
5.6 Ammonia removal by water washing
5.7 Final cooling of gas
5.8 Absorption of crude benzene
5.9 Final removal of naphthalene
5.10 Wet desulfurization
5.11 Desulfurization by ferric oxide method at atmospheric pressure
5.12 Conversion of carbon monoxide
5.13 Gas dehydration
5.14 Relief gas and liquid seal
6 Gas Transmission and Distribution System
6.1 General requirement
6.2 Design of gas flow and hydraulic calculation of gas pipelines
6.3 The outdoor gas pipelines with pressure not higher than 1.6 MPa
6.4 The outdoor gas pipelines with pressure higher than 1.6 MPa
6.5 City Gate and storage and distribution station
6.6 Regulator station and regulators
6.7 Corrosion control for steel gas pipelines and storage tanks
6.8 Supervisory control and data acquisition (SCADA)
7 Supply of Compressed Natural Gas (CNG)
7.1 General requirement
7.2 CNG fuelling station
7.3 CNG stored and distributed station
7.4 Station for CNG multiple cylinder installations
7.5 Pipes and accessories
7.6 Buildings and auxiliary facilities for production
8 Supply of Liquefied Petroleum Gas (LPG)
8.1 General requirement
8.2 LPG transportation
8.3 LPG supply base
8.4 Vaporizing station and mixing station
8.5 Vaporizing station of multiple cylinder installations
8.6 Bottled LPG delivered station
8.7 Users
8.8 Pipes, accessories, storage tanks, vessels and instruments
8.9 Fire Prevention, explosion protection and earthquake resistance of buildings or structures
8.10 Fire water supply, drainage and fire-fighting equipments
8.11 Electricity
8.12 Communication and afforesting
9 Supply of Liquefied Natural Gas (LNG)
9.1 General requirement
9.2 LNG vaporizing station
9.3 Vaporizing station of LNG multiple cylinder installations
9.4 Pipelines & accessories, storage tanks, vessels, vaporizers, gas heaters and checking instruments
9.5 Fire water supply, drainage and extinguishing apparatuses
9.6 Civil engineering and auxiliary production facilities
10 Application of Gas
10.1 General requirement
10.2 Indoor gas pipelines
10.3 Metering of gas
10.4 Gas for domestic use
10.5 Gas for commercial use
10.6 Gas use for industrial enterprises production
10.7 Exhaustion of flue gas from burning
10.8 Monitoring facilities of fuel gas and lightning and static electricity protection
Appendix A Classification of Explosion and Fire Hazard Areas for Main Workplaces in Gas Manufacture Workshops
Appendix B Classification of Explosion and Fire Hazard Areas for Main Workplaces in Gas Purification Workshops
Appendix C Friction Resistance Calculation of Gas Pipelines
Appendix D Classification of Explosion Hazard Areas for Electric Installation Workplaces in Gas Transmission and Distribution System
Appendix E Classification for Explosion Hazard Areas for Electric Installation Workplaces in LPG Station
Appendix F Residential Gas Appliance Coincidence Factor, K
Explanation of Wording in This Code
