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ASME B16.47-2025 Large Diameter Steel Flanges: NPS 26 Through NPS 60

ASME B16.47-2025 Large Diameter Steel Flanges: NPS 26 Through NPS 60 by ASME (2025) — available for instant access at Publications Office.

ASME B16.47 American Society of Mechanical Engineers (ASME) 2025

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About this publication

This standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60. Included are flanges with rating class designations 75, 150, 300, 400, 600, and 900 with requirements given in both SI (Metric) and U. S. Customary units, with diameter of bolts and flange bolt hole expressed in inch units. This standard is limited to flanges made from cast or forged materials and blind flanges made from cast, forged, or plate materials.