Introduction
High-pressure flanges are critical components in industries such as oil and gas, petrochemical, and power generation. Their failure can lead to costly downtime or safety incidents. Procurement engineers must ensure that the flanges they source meet strict design, material, and testing standards. This guide provides a practical framework for evaluating and purchasing high-pressure flanges from a manufacturer like Hebei Haihao Group.
Key Standards to Confirm
Before issuing an RFQ, confirm which standard applies to your project. Common standards for high-pressure flanges include:
- ASME B16.5: For flanges up to Class 2500 (PN 420). Covers dimensions, tolerances, and pressure-temperature ratings.
- ASME B16.47: For large-diameter flanges (Series A and B).
- API 6A: For wellhead and Christmas tree equipment (typically higher pressure ratings).
- EN 1092-1: European standard for flanges.
