Introduction
In heavy industry, high-pressure flange connections are critical to the integrity of piping systems. A failure in a flange joint under high pressure can lead to catastrophic leaks, downtime, and safety hazards. For procurement engineers and industrial buyers, selecting the right high-pressure flanges involves more than comparing prices. This guide covers the essential factors to consider when sourcing flanges for demanding applications, including material grades, applicable standards, inspection requirements, and a practical RFQ checklist.
Standards and Specifications to Confirm
High-pressure flanges must comply with international standards to ensure interchangeability and performance. The most common standards include:
- ASME B16.5: For pipe flanges and flanged fittings (up to 24 inches, Classes 150–2500).
- ASME B16.47: For large-diameter flanges (Classes 150–900).
- EN 1092-1: European standard for flanges, often used in projects outside North America.
