This standard specifies technical requirements for arrangement, specification and material, supporting rib, explosion precautions, design of supporter and hanger for air & flue gas ducts/raw coal & pulverized coal piping of fossil fuel power plant boilers, as well as selection for chimney exit velocity, etc.
This standard is applicable to air & flue gas ducts/raw coal & pulverized coal piping design for steel structure of coal burning boiler with capacity is 65-2000t/h grade. It only proposes relevant technological design requirements for air flue gas ducts of nonmetallic structure.
Design for air flue gas ducts of fuel oil and natural gas burning boilers, and air & flue gas ducts/raw coal & pulverized coal piping of coal burning boiler with capacity is less than 65t/h and is larger than 2000t/h grade may comply with this standard.
Engineering concerning foreign affairs must consider condition and using standard of supplier and purchaser's country, it may use this standard by reference.
1 Scope
2 Normative references
3 General provisions
4 Piping arrangement
4.1 General requirements
4.2 Gas duct
4.3 Cold air duct
4.4 Hot air duct
4.5 Raw coal pipeline
4.6 Pulverization pipeline
4.7 Pulverized coal delivery piping
5 Specification and material of the pipeline
5.1 Pipeline specification
5.2 Material
5.3 Weld
6 Pipeline and supporting rib
6.1 General requirements
6.2 Design for pipeline and supporting rib
7 Optimized selected type for shaped piece
7.1 General requirements
7.2 Selected type for shaped piece
8 Accessory and component
8.1 General requirements
8.2 Accessory
8.3 Components
8.4 Air lock
8.5 Damper
9 Explosion precautions
9.1 General requirements
9.2 Raw coal bunker
9.3 Pulverized coal bin
Appendix A
A1 Pulverized Coal Delivering Duct
A2 Flue and pulverizing pipe
A3 Round air duct
A4 Rectangular duct
A5 English system pulverized coal delivering duct
Appendix B
Appendix C
C1 Permissible stress of usual constructional steel products
C2 Elastic modulus of general constructional steel products
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Appendix J
Appendix K
Appendix L
L1 Rotary moment of damper with self-lubrication aligning bearing
L2 Rotary moment of cast iron damper
Appendix M
Appendix N
Appendix P
Appendix Q
