Patent ID: 7451663
Filing Date: 2008-11-18
Classification: G01F

Abstract:
1. A flowmeter tube for use in measuring the flow rate of erosive materials, the flowmeter tube comprising: a tube having a wall forming an inlet section having a first cross sectional area for receiving flowing erosive materials and an outlet section having a second cross sectional area for receiving said flowing erosive materials from the inlet portion; wherein the first cross sectional area is larger than said second cross sectional area; a first pressure tap communicating with said inlet section; a second pressure tap communicating with said outlet section; said wall having an inside coating of tungsten carbide cemented by a nickel chromium alloy; said coating metallurgically bonded to said wall and having a hardness of Rockwell 56 to 70 and a surface roughness of less than or equal to 250 microinches rms.