What are the straight pipe requirements for electromagnetic flowmeter installation?

EMF requires 5-20D upstream and 2-5D downstream straight pipe, depending on piping configuration

Straight pipe requirements for electromagnetic flowmeters are crucial for maintaining measurement accuracy. The LGF electromagnetic flowmeter installation follows international standards ISO 10790 and ASME MFC-3M:

  • Upstream straight pipe: Minimum 5D (D=pipe diameter) for standard conditions, 10D after 90° elbow, 15D after control valve
  • Downstream straight pipe: Generally 2-3D, up to 5D for special applications
  • Installation location: Avoid direct installation after pumps or valves, ensure full pipe conditions
  • Complex piping: Multiple elbows require 20D upstream, T-junction requires 15D upstream
  • Flow conditioner option: When space is limited, flow conditioners can reduce requirements to 3-5D

Ecolor Technology's LGF series electromagnetic flowmeters utilize advanced excitation technology with improved tolerance to flow disturbances, while maintaining ±0.5% accuracy across DN10-DN2000 range when properly installed.

Electromagnetic Flowmeter

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