Which standard covers gray iron pipe flanges?

Which standard covers gray iron pipe flanges?

• A. ASME B16.1
• B. ASME B16.5
• C. ANSI B36.10M
• D. ASME B16.3

Answer: (A)

Gray iron pipe flanges are governed by the standard for cast iron pipe flanges and flanged fittings. ASME B16.1 covers cast iron flanges (including gray iron) and defines their dimensions, drilling, and pressure-related details. The other standards focus on different materials or fittings: ASME B16.5 is for steel pipe flanges and flanged fittings, ANSI B36.10M gives general pipe dimensions for steel pipe, and ASME B16.3 addresses malleable iron threaded fittings, not gray iron flanges. So the best answer is ASME B16.1.

Gray iron pipe flanges are governed by the standard for cast iron pipe flanges and flanged fittings. ASME B16.1 covers cast iron flanges (including gray iron) and defines their dimensions, drilling, and pressure-related details. The other standards focus on different materials or fittings: ASME B16.5 is for steel pipe flanges and flanged fittings, ANSI B36.10M gives general pipe dimensions for steel pipe, and ASME B16.3 addresses malleable iron threaded fittings, not gray iron flanges. So the best answer is ASME B16.1.