The Ultimate Guide To ASME/ANSI B16.47 Series A & Series B Flanges
Large-diameter piping systems are the lifeblood of critical infrastructure, including offshore oil platforms, petrochemical refineries, municipal water transmission networks, and power generation plants. When joining pipe sizes from NPS 26 to NPS 60, standard fittings such as ASME B16.5 reach their size limit. Procurement professionals must rely on the ASME B16.47 to govern design, manufacturing, and structural safety. The ASME B16.47 covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for large-diameter steel pipe flanges. Understanding this standard—specifically, the structural and operational differences between Series A and Series B flanges—is vital to ensuring mechanical integrity, avoiding costly installation failures, and optimizing lifecycle costs in high-pressure pipeline applications. Introduction: The Role of Large-Diameter Flanges Overview of Large-Diameter Flanges (26"–60") Large-diameter f...