Which standard covers pipe flanges, NPS 1/2 to 24?

Which standard covers pipe flanges, NPS 1/2 to 24?

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

Answer: (B)

Understanding pipe flange standards means recognizing that the connections between piping sections are defined by specific dimensions, bolt patterns, and pressure ratings so parts from different manufacturers fit together safely. For pipe flanges in the size range 1/2 inch to 24 inches, the standard that specifies these flange dimensions and flange fittings is ASME B16.5. It covers the types, dimensions, bolt circles, hole patterns, and pressure classes for flanges and flanged fittings across common piping materials, ensuring compatibility and reliable joints in most systems, including residential sprinkler piping. ASME B16.1, in contrast, focuses on cast iron pipe flanges and flanged fittings, which is specific to cast iron materials. ANSI B36.10M is about standard pipe sizes and weights for welded or seamless steel pipes, not the flange dimensions themselves. AWS A5.8 concerns welding filler metals, not flange geometry. So for the general flange size range used in typical piping, ASME B16.5 is the correct reference.

Understanding pipe flange standards means recognizing that the connections between piping sections are defined by specific dimensions, bolt patterns, and pressure ratings so parts from different manufacturers fit together safely. For pipe flanges in the size range 1/2 inch to 24 inches, the standard that specifies these flange dimensions and flange fittings is ASME B16.5. It covers the types, dimensions, bolt circles, hole patterns, and pressure classes for flanges and flanged fittings across common piping materials, ensuring compatibility and reliable joints in most systems, including residential sprinkler piping.

ASME B16.1, in contrast, focuses on cast iron pipe flanges and flanged fittings, which is specific to cast iron materials. ANSI B36.10M is about standard pipe sizes and weights for welded or seamless steel pipes, not the flange dimensions themselves. AWS A5.8 concerns welding filler metals, not flange geometry. So for the general flange size range used in typical piping, ASME B16.5 is the correct reference.