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Hose for conveying force to train brakes by a differential in air pressure. Contains either high-pressure compressed air or air at lower than atmospheric pressure (vacuum), depending on whether the locomotive has an air brake or vacuum brake system. [6]: 483–486 [3]: 1 Water compartment Tank for water to be used by the boiler to produce steam.
A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal for other locomotives. Most locomotives operate with a steam pressure of 200 to 300 psi (1.38 to 2.07 MPa). [1] In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa).
The Pressure Equipment Directive (PED) 2014/68/EU (formerly 97/23/EC) [1] of the EU sets out the standards for the design and fabrication of pressure equipment ("pressure equipment" means steam boilers, pressure vessels, piping, safety valves and other components and assemblies subject to pressure loading) generally over one liter in volume and having a maximum pressure more than 0.5 bar gauge.
Moderate vacuum pressure readings can be ambiguous without the proper context, as they may represent absolute pressure or gauge pressure without a negative sign. Thus a vacuum of 26 inHg gauge is equivalent to an absolute pressure of 4 inHg, calculated as 30 inHg (typical atmospheric pressure) − 26 inHg (gauge pressure).
At the time Provan Gasworks had an extensive 2 ft 6 in (762 mm) gauge railway running through the gas works and Dougal was one of the many engines built to run on it. Gas works lines like this usually meant working in the very restricted confines of retort houses, explaining Dougal's small and especially low shape. In 1958 the gas works were ...
The first edition of the Boiler and Pressure Vessel Code, known as the 1914 edition, was a single 114-page volume. [ 6 ] [ 7 ] It developed over time into the ASME Boiler and Pressure Vessel code, which today has over 92,000 copies in use, in over 100 countries around the world. [ 5 ]
Water gauge on a steam locomotive. Here the water is at the “top nut”, the maximum working level. Note the patterned backplate to help reading and toughened glass shroud. A sight glass or water gauge is a type of level sensor, a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within.
Napier boiler: A high-domed low-pressure boiler used on early steamships. [41] Also known as the "haystack", although not the usual, and even earlier, haystack boiler. [41] Niclausse boiler: a field-tube boiler, with the field-tubes set at a shallow angle to horizontal. [6] [42] Normand boiler: an early three-drum boiler used mainly by the ...
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