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  2. Chimney - Wikipedia

    en.wikipedia.org/wiki/Chimney

    A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method of regulating draft in situations where prevailing winds or ...

  3. Double chimney - Wikipedia

    en.wikipedia.org/wiki/Double_chimney

    The double chimney was removed in 1953, owing to the already-good performance of the standard chimney and problems with the softer blast of the double chimney not clearing smoke away from the cab so well. [14] 4765 and 4766 had also trialled a similar double chimney, but with the standard Walschaerts valvegear. [14]

  4. Chimney liner - Wikipedia

    en.wikipedia.org/wiki/Chimney_liner

    This is done with stainless steel chimney liners. A stainless-steel chimney flue liner protects the chimney walls from wear and tear and stops carbon monoxide leaks and other dangerous combustion product leaks. Stainless-steel chimney liners have surface and proper sizing to prevent creosote from sticking around. If the chimney already has a ...

  5. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  6. Glossary of North American railway terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_North_American...

    A bulkhead is a flatcar with walls on the front and rear. A center-beam bulkhead is a bulkhead flatcar with an additional wall dividing one side of the flatcar from the other, but still without any sides. [104] Flatback Industry slang for trailer-on-flatcar service in the 1970s, especially in the trade journal Railway Age [113] Foamer

  7. Breccia pipe - Wikipedia

    en.wikipedia.org/wiki/Breccia_pipe

    Breccia is typically silicified and consists of many smaller irregular rock fragments. Breccia pipe cutting Eday Sandstone, Ophir Bay, Orkney. A breccia pipe, also referred to as a chimney, is a mass of breccia (rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix), often in an irregular and cylindrical shape.

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