Which standard governs pipe flanges for sizes from 1/2 to 24 inches?

Which standard governs pipe flanges for sizes from 1/2 to 24 inches?

• A. ASME B16.1
• B. ASME B16.5
• C. ANSI B36.10M
• D. AWS A5.8

Answer: (B)

The main point is that pipe flanges for sizes from 1/2 to 24 inches are governed by ASME B16.5. This standard covers the dimensions, bolt patterns, flange faces, and pressure–temperature ratings for flanges and flanged fittings across common materials, ensuring parts from different manufacturers fit together reliably. While other standards exist for related topics—such as cast-iron flange specifics, general pipe dimensions, or welding filler metals—they don’t provide the comprehensive flange dimensions and interfaces needed for flanges in this size range. That’s why ASME B16.5 is the appropriate reference.

The main point is that pipe flanges for sizes from 1/2 to 24 inches are governed by ASME B16.5. This standard covers the dimensions, bolt patterns, flange faces, and pressure–temperature ratings for flanges and flanged fittings across common materials, ensuring parts from different manufacturers fit together reliably. While other standards exist for related topics—such as cast-iron flange specifics, general pipe dimensions, or welding filler metals—they don’t provide the comprehensive flange dimensions and interfaces needed for flanges in this size range. That’s why ASME B16.5 is the appropriate reference.