<p>Locomotive boiler, sectioned view
</p><p>Diagram showing construction of a locomotive boiler. Also cross sections of round-topped, <a href="https://en.wikipedia.org/wiki/Belpaire_firebox" class="extiw" title="w:Belpaire firebox">Belpaire</a> and <a href="https://en.wikipedia.org/wiki/Wootten_firebox" class="extiw" title="w:Wootten firebox">Wootten</a> fireboxes.
</p><p>Note that this boiler is not superheated.
</p>
<table><caption>Key
</caption>
<tbody><tr><td>AP</td>
<td>Ash Pan
</td></tr><tr><td>B1</td>
<td>Boiler Barrel (1st ring)
</td></tr><tr><td>B2</td>
<td>Boiler Barrel (2nd ring)
</td></tr><tr><td>B3</td>
<td>Boiler Barrel (3rd ring)
</td></tr><tr><td>BA</td>
<td>Brick Arch
</td></tr><tr><td>BD</td>
<td>Back Damper
</td></tr><tr><td>BL</td>
<td>Blower
</td></tr><tr><td>BP</td>
<td>Blast Pipe
</td></tr><tr><td>BPL</td>
<td>Back Plate
</td></tr><tr><td>BTP</td>
<td>Back Tube Plate
</td></tr><tr><td>C</td>
<td>Chimney
</td></tr><tr><td>CS</td>
<td>Crown Sheet
</td></tr><tr><td>DP</td>
<td>Deflector Plate
</td></tr><tr><td>FB</td>
<td>Firebox (inner)
</td></tr><tr><td>FD</td>
<td>Front Damper
</td></tr><tr><td>FH</td>
<td>Fire Hole
</td></tr><tr><td>FR</td>
<td>Foundation Ring
</td></tr><tr><td>FTP</td>
<td>Front Tube Plate
</td></tr><tr><td>GB</td>
<td>Grate Bars
</td></tr><tr><td>OFB</td>
<td>Outside Firebox
</td></tr><tr><td>PP</td>
<td>Petticoat Pipe
</td></tr><tr><td>R</td>
<td>Regulator
</td></tr><tr><td>RH</td>
<td>Regulator Handle
</td></tr><tr><td>RS</td>
<td>Regulator Spindle
</td></tr><tr><td>S</td>
<td>Stays
</td></tr><tr><td>SB</td>
<td>Smokebox
</td></tr><tr><td>SD</td>
<td>Steam Dome
</td></tr><tr><td>SMD</td>
<td>Smokebox Door
</td></tr><tr><td>SP</td>
<td>Steam Pipe
</td></tr><tr><td>SS</td>
<td>Sling Stays
</td></tr><tr><td>ST</td>
<td>Screw Stays
</td></tr><tr><td>SV</td>
<td>Safety Valves
</td></tr><tr><td>T</td>
<td>Tubes
</td></tr><tr><td>TP</td>
<td>Throat Plate
</td></tr><tr><td>WL</td>
<td>Water Level
</td></tr></tbody></table>
J.F. Gairns (d. 1930)
1923
<ul><li><a href="//commons.wikimedia.org/wiki/File:Locomotive_boiler_sectioned.jpg" title="File:Locomotive boiler sectioned.jpg">Locomotive_boiler_sectioned.jpg</a></li></ul>