Blind flange ASME B16.47 Series B (API 605)
The Blind Flange (BL Flange), ASME B16.47 Series B (API 605) is a large diameter flange used to seal the end of piping systems, valves, or pressure vessel nozzles, providing complete isolation of flow.
Designed for large-size pipelines, typically NPS 26" to 60" and above, Series B flanges (aligned with API 605) feature a more compact bolt circle compared to Series A, making them lighter and more cost-effective.
These flanges are widely used in oil & gas transmission systems, offshore platforms, and large industrial facilities, where reliable sealing and structural integrity are critical.