How to measure the aperture size

How to measure the aperture size, Total:12 items.

The international standard classification for "How to measure the aperture size" includes: .

The Chinese standard classification for "How to measure the aperture size" includes: .

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Heilongjiang Provincial Standard of the People's Republic of China

• DB23/T 1524-2013 Technical regulations for small aperture measuring instruments with large depth-to-diameter ratio

National Metrological Technical Specifications of the People's Republic of China

• JJF 1806-2020 Calibration Specification for Measuring Equipmentof Diameter of Micro and Small Hole

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)

• ASHRAE AN-04-4-3-2004 Measurement of Pore Size Variation and Its Effect on Energy Wheel Performance

Ente Nazionale Italiano di Unificazione

• UNI 10481:1995 Filter paper. Determination of equivalent diameter of maximum, minimum and mean flow pore.
• UNI 6946:1971 Tapping screws of steel. Core holes.

American Society of Mechanical Engineers (ASME)

• ASME MFC-14M-1995 Measurement of fluid flow using small bore precision orifice meters
• ASME MFC-14M-2003 Measurement of Fluid Flow Using Small Bore Precision Orifice Meters
• ASME MFC-14M-2003(R2018) Measurement of Fluid Flow Using Small Bore Precision Orifice Meters

NL-NEN

• NEN 5168-1990 Geotextile Determination of the characteristic pore size in dry condition

IPC - Association Connecting Electronics Industries

• IPC TM-650 2.2.6A-1997 Hole Size Measurement@ Drilled
• IPC TM-650 2.2.6-1973 Hole Size Measurement@ Drilled

CZ-CSN

• CSN 50 0402-1994 Filter papers. Determination of the maximum pore diameter

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