Patent ID: 9625294
Date: 2017-04-18
CPC Classifications: F16L,G01F

Claim:
1. Flow measuring device comprising a measuring tube with a sensor arrangement and an evaluation unit for ascertaining a flow velocity, a volume flow and/or a mass flow, wherein the sensor arrangement is arranged on or in a measuring tube, which measuring tube has: a measuring tube wall of a metal support material and a first ply of a corrosion resistant, synthetic material, wherein the first ply protects the metal support material from corrosive measured media and is placed on an inner surface of the measuring tube wall; or a measuring tube wall of a corrosion resistant, synthetic material; wherein in the measuring tube on the side of the first ply facing the medium or on the measuring tube wall of the corrosion resistant, synthetic material facing the medium a ply or second ply is arranged for reducing mechanical loading, especially abrasive loading, of the synthetic material by the measured medium, wherein the ply or second ply has a greater hardness than the first ply or the measuring tube wall of corrosion resistant, synthetic material.