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
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.
Contents of DL/T 5121-2000
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
