1.0.1 This code is formulated with a view to implementing the national relevant laws, regulations and policies on the design oil and gas transportation pipeline crossing engineering and ensuring the safety, environmental protection, economy and rationality as well as applicability and reliability of the engineering.
1.0.2 This code is applicable to the design for constructed and extended engineering of the oil and gas transportation pipeline onshore crossing artificial or natural barrier.
1.0.3 The design for crossing engineering shall not only meet the requirements of this code, but also meet those specified in the current relevant national standards
1 General Provisions 1
2 Terms 1
3 Basic Requirements 2
3.1 Basic Data 2
3.2 Material 3
3.3 Crossing in Water Areas 4
3.4 Crossing in Mountainous Areas and Gully 6
3.5 Railway (Highway) Crossing 7
3.6 Position Selection for Pipeline Crossing in Tunnel 8
4 Crossing by Ditching 9
4.1 Burying Requirements 9
4.2 Marine Section Stabilization 10
4.3 Load and Combination 12
4.4 Section Calculation 13
4.5 Protection Project Design 15
5 Crossing by Horizontal Directional Drilling 18
5.1 Laying Requirements 18
5.2 Section Calculation 18
6 Design for Crossing in Tunnel 19
6.1 General Provisions 19
6.2 Loads 20
6.3 Action Combination and Calculation 21
6.4 Design for Tunnel by Digging 22
6.5 Design for Tunnel by Shield Digging 25
6.6 Design for Tunnel in Pipe Pushing 26
6.7 Shaft Project 28
6.8 Inclined Shaft Engineering 32
6.9 Engineering Materials 33
6.10 Waterproof and Drainage 33
6.11 Ventilation and Lighting 35
6.12 Piping Installation in Tunnel 35
7 Railway (Highway) Crossing 36
7.1 Erection Requirements 36
7.2 Crossing Design without Casing Pipe 37
7.3 Crossing Design with Casing Pipe 43
8 Welding, Pressure Testing and Anti-Corrosion 44
8.1 Welding and Inspection 44
8.2 Pressure Testing 45
8.3 Anti-Corrosion 45
Appendix A Calculation Method for Unsymmetrial Loading Tunnel Lining Action (Load) 47
Appendix B Calculation Method for Shallowly-Buried Tunnel Lining Action (Load) 49
Explanation of Wording in This Code 51
