1.0.1 This specification is prepared as required by Shanghai urban construction and the development of manufactured gas and natural gas, in accordance with the national and professional standard and by considering the specific conditions of Shanghai.
1.0.2 This specification is applicable to the design, installation and acceptance of residential buildings supplied by manufactured gas and natural gas piping, public buildings, industrial enterprises and the newly-built, reconstructed and expanded underground and over-ground gas pipeline and equipment in urban construction.
1.0.3 This specification is applicable to the gas pipeline engineering (excluding liquid gas) with the designed manufactured gas pressure P ≤0.4 MPa (meter pressure) and the designed natural gas pressure P≤1.6MPa (meter pressure). The grades are:
Sub-high pressure A 0.8MPa
Contents of DGJ 08-10-2004
Contents
1 General Provisions
2 Terms
3 Underground Gas Pipeline
3.1 Plane Arrangement of Pipeline
3.2 Arrangement of Pipeline's Longitudinal Section
3.3 Service Pipe
3.4 Pipe, Pipe Fitting and Auxiliary Equipment
3.5 Traversing (Spanning) of Pipeline
4 Over-ground Gas Pipeline
4.1 General Requirements
4.2 Outdoor Overhead Pipeline
4.3 Riser Pipe
4.4 Indoor Gas Pipeline
4.5 Indoor Gas Pipeline Concealment
5 Gas for Domestic Use
5.1 General Requirements
5.2 Gas Water Heater
6 Gas for Commercial Use
7 Gas for Industrial Use
8 Exhaust of Combustion Flue Gas
9 Gate Stations, Pressure Regulation and Metering
9.1 Gate Stations
9.2 Regulator Station and Regulator
9.3 User Gas Metering and Meter
10 Calculation
10.1 Gas Consumption Calculation
10.2 Pipeline Calculation
10.3 Pressure Drop Distribution of Gas Pipelines
10.4 Gas Regulator Flow Calculation
10.5 Fuel Conversion, Sectional area of Discharge Pipe and Gas Displacement Calculation
11 Installation of Pipeline and Equipment
11.1 Earthwork
11.2 Inspection of Pipelines, Fittings, Accessories and Equipment
11.3 Pipeline Installation
11.4 Corrosion Protection for Steel Pipes
11.5 Cast Iron Pipe Construction
11.6 Construction of Polyethylene Gas pipeline
11.7 Installation of Indoor Gas Pipeline and Equipment
11.8 Installation of Indoor Gas Pipeline Concealment
12 Pressure Test and Acceptance
12.1 General Requirements
12.2 Pigging of Pipelines
12.3 Purging of Pipelines
12.4 Strength Test
12.5 Tightness Test
12.6 Pressure Test and Acceptance of Medium-Pressure Grade B Indoor Pipes
12.7 Engineering Completion Acceptance
Appendix A Per Unit Length Friction Resistance Calculation of Copper Gas Pipe and Stainless Steel Flexible Hose
Appendix B Simultaneous Working Coefficient and Calculated Flow Rate of Gas Double-Eye Stove and Water Heater
Appendix C Rated Total Flow of Gas Appliances Used in Foodservice Industry, Arrangement of Gas Appliances and Gas Gauges as Well as Percentage of Gas Appliances Accounting for the Total Flow
Appendix D Configuration Reference Table of Gas Equipment for Various Pastries
Appendix E Explanation of Wording in this Specification
