ASME B16.47 Series A vs. Series B: Understanding Large Diameter Flange Standards
1. The Scope of Large Diameters While ASME B16.5 covers flanges up to 24″, ASME B16.47 takes over for sizes from 26″ to 60″.
2. Two Different Philosophies
- Series A (MSS SP-44): Thicker, heavier, and features larger bolts. It is designed to handle higher external loads.
- Series B (API 605): Thinner, lighter, and uses more (but smaller) bolts. It was originally designed for compact spaces and lower-cost installations.
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