Introduction
Medium and low pressure pipe flanges are critical components in industrial piping systems. For EPC procurement engineers, selecting the right manufacturer directly impacts project safety, cost, and schedule. This guide provides practical criteria for evaluating flange suppliers, with a focus on medium and low pressure applications.
Key Standards to Confirm
Before issuing an RFQ, ensure the manufacturer can produce flanges to the following common standards:
- ASME B16.5: For flanges and flanged fittings, covering pressure-temperature ratings up to Class 600.
- ASME B16.47: For large diameter flanges (Series A and B).
- DIN 2501 (or EN 1092-1): For metric flanges used in Europe.
- JIS B2220: For Japanese standard flanges.
Also verify that materials meet ASTM specifications such as A105 (carbon steel), A182 (alloy and stainless steel), or A350 (low temperature carbon steel).
