Daehan Instrument Co., Ltd.

International Flow Measurement Standards

International Flow Measurement Standards

Comprehensive guide to flowmeter international standards compiled by experts with 35 years of experience. Core content and practical application methods for ISO, ASME, JIS, KS standards.

ISO 5167

Differential Pressure Flow Measurement International Standard

International standard for fluid flow measurement using differential pressure, covering design and use of orifice plates, venturi tubes, and flow nozzles.
  • ISO 5167-1: General principles and requirements
  • ISO 5167-2: Orifice plates
  • ISO 5167-4: Venturi tubes
  • ISO 5167-6: Wedge meters
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ASME MFC-3M

ASME Flow Measurement Standard

Flow measurement standard established by the American Society of Mechanical Engineers, providing detailed guidance on design, installation, and use of differential pressure flowmeters.
  • SI and Imperial unit systems supported
  • Detailed uncertainty analysis methods
  • Practice-oriented application guide
  • Widely adopted in North American industry
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JIS Z 8762

Japanese Industrial Standard for Differential Pressure Flowmeters

Japanese Industrial Standard presenting criteria for design, manufacture, and inspection of differential pressure flowmeters, widely used in Asian region.
  • High compatibility with ISO standards
  • Reflects Asian regional industry characteristics
  • Metric unit system based
  • Accommodates precision manufacturing requirements
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KS B 0801

Korean Industrial Standard for Flow Measurement

Korean Industrial Standard defining fluid flow measurement methods in closed conduits, contributing to standardization of flow measurement in domestic industry.
  • Reflects domestic regulations and certification requirements
  • Harmonized with ISO/JIS standards
  • Korean technical documentation provided
  • Optimized for domestic industrial environment
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API 21.1

API Differential Pressure Flowmeter Standard

American Petroleum Institute standard for differential pressure flowmeters in oil and gas industry, providing guidance for accurate flow measurement under extreme conditions.
  • Extreme environmental conditions capability
  • High accuracy requirements
  • Safety-focused design
  • Internationally recognized for trade
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AGA Report No. 3

AGA Natural Gas Metering Standard

American Gas Association natural gas orifice metering standard, the most widely used international standard for natural gas trading.
  • Optimized for natural gas characteristics
  • Custody transfer precision guaranteed
  • Real-time compensation capability
  • Internationally recognized for trade
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