Locomotive boiler, sectioned view Diagram showing construction of a locomotive boiler. Also cross sections of round-topped, Belpaire and Wootten fireboxes. Note that this boiler is not superheated. Key AP Ash Pan B1
49 CFR Appendix B to Part 230 - Diagrams and Drawings | Electronic Code of Federal Regulations (e-CFR) | US Law | LII / Legal Information Institute