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.
Blind flange ASME B16.47 Series B (API 605)
Material:
Carbon steel : A105, A36, Rst37.2, St37.2, C22.8, SA350 LF2/LF1, Q235, Q345, SS400,ASTM A105,20#, A234, 16Mn、ASTM A350 LF1,LF2 CL1/CL2,LF3 CL1/CL2、ASTM A694 F42,F46,F48,F50,F52,F56,F60,F65,F70
Stainless steel: 304,304L,316,316L,F321,F347,F310，F44 F51,A276 S31803, A182, F43, A276 S32750,A705 631,632,A961, A484,
Alloy steel: ASTM A182 F1、 F5a、 F9、 F11、 F12、 F22、 F91、A182F12、A182F11、16MnR、Cr5Mo、12Cr1MoV、15CrMo、12Cr2Mo1、A335P22、St45.8/Ⅲ、35CrMoV、 45CrMo
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