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
