ANSI / ASME Flange Pressure Ratings: Class 150 to 2500
ANSI/ASME B16.5 and B16.47 standards define standardized pressure–temperature limits for flanged piping systems. Each pressure class corresponds to a specific rating that varies based on material group and operating temperature. This article explains these ratings, ranging from Class 150 through Class 2500, outlines the critical differences between B16.5 and B16.47, and provides reference tables based […]
The Standard Types of ANSI/ASME Flanges
ANSI/ASME flanges are the primary connection components which are used in industrial piping systems across oil & gas, petrochemical, power generation, water treatment, and mechanical/HVAC applications.ANSI/ASME B16.5 covers NPS ½” to 24” in pressure classes 150 to 2500. Flange types include: Threaded, Slip-on, Lapped, Blind, and Weld Neck flanges (≤24”).ANSI/ASME B16.47 covers Sizes 26″ to […]
How Do ANSI/ASME Flanges Work?
ANSI/ASME flanges are built specifically for high-pressure piping systems, as they can maintain a reliable seal under demanding conditions. They work by compressing a gasket between two machined flange faces using bolts. This creates a controlled, leak-proof seal that is capable of withstanding internal pressure, temperature changes, vibration, and mechanical loads. This article explains in […]
Understanding ANSI/ASME B16.5 and B16.47 Standards
The American National Standard Institute (ANSI) Sectional Committee B16 has been defining publishing safety and dimensional standards for piping systems since 1922. Sectional Committee B16 was reorganized as an ASME (American Society of Mechanical Engineers) standards committee in 1982 with the first publication of the standards under the ASME/ANSI designation in 1988. Today, these standards […]