EN ISO 8316:1995 PDF

Overview

EN ISO 8316:1995 - Measurement of liquid flow in closed conduits by collection in a volumetric tank - specifies a volumetric tank (gauge) method for determining liquid flow-rate in closed conduits. The standard covers apparatus, procedures, calibration (level–volume relationship), calculation of flow-rate and the assessment of measurement uncertainty. It is commonly used as a primary or reference method for calibrating flowmeters and for high-accuracy laboratory and legal‑metrology applications.

Key topics and technical requirements

• Scope and applicability
  • Intended for liquids with sufficiently low vapor pressure and viscosity, and that are non‑toxic and non‑corrosive.
  • Practically used for flow-rates typically up to about 1.5 m3/s and mainly in fixed laboratory installations.
• Measurement principles
  • Static gauging: determine initial and final tank volumes by level readings before and after diversion for a known time.
  • Dynamic gauging: determine net collected volume from continuous level measurement while flow is delivered to the tank.
• Apparatus & setup
  • Volumetric tank with established level–volume calibration (transfer volumes or dimensional methods).
  • Diverter or valve that redirects flow to the tank without changing the flow-rate; diverter travel should be fast (recommended