High-pressure Steam Locomotive

A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal. In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa). High-pressure locomotives can be considered to start at 350 psi (2.41 MPa), when special construction techniques become necessary, but some had boilers that operated at over 1,500 psi (10.34 MPa).

Read more about High-pressure Steam LocomotiveThe Reason For High Pressure, Jacob Perkins, The Schmidt System, The Schwarzkopff-Löffler System, The Straightforward Approach

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High-pressure Steam Locomotive - The Straightforward Approach
... high maintenance costs and poor reliability more than cancelled the fuel economies promised by high-pressure and compounding, and the design was not ... Other relatively conventional high-pressure locomotives were built in the USA, including the remarkable triple-expansion L F Loree locomotive of 1933 ...

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