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7. Manufacturing and installation constraints
7.1 General remarks
When it comes to diaphragms, the standardizer's concern is obviously to specify a component that is deemed reliable because it can be easily produced in a reproducible way. The plate must be rigid but thin. The orifice is a simple, cylindrical, centered hole with a machined upstream edge. When pressure constraints dictate that the thickness of the plate exceeds 2% of the pipe diameter, a chamfer at a fixed angle of 45° is made on the downstream side (figure 3 a). Checks must be carried out on flatness and surface finish.
Diaphragms...
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Bibliography
Standards and norms
- Flow measurement of fluids by means of depressurizers inserted in loaded pipes of circular cross-section – Part 1: General principles and requirements. Association française de normalisation Afnor - NF EN ISO 5167-1 - juin 2022
- Flow measurement of fluids by means of depressurizers inserted in loaded pipes of circular cross-section – Part 2: Diaphragms - NF EN ISO 5167-2 - Juin 2022
- Flow measurement of fluids...
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