Blind Flange

What is a blind flange?

A blind flange also called blank flange,it looks like a plate with bolts holes around.The function of a blind flange is like a pipe cap,but it could be assembly easily by the bolts.There is no inner hole on the blind flange comparing to other type flanges,so the blind flange is used to close the end of a vessel or piping system,and it is not connect with any pipe or vessel.Blind flange also be used for pressure testing for prevent the liquid or air flow..

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Specification of blind flange:

ANSI/ASME standard:

  • ANSI/ASME B16.5 class 150 blind flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 300 blind flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 400 blind flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 600 blind flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 900 blind flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 1500 blind flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 2500 blind flange dimensions: ½”-12″
  • ANSI/ASME B16.47 series A class 150 blind flange dimensions: 22″-48″
  • ANSI/ASME B16.47 series A class 300 blind flange dimensions: 22″-48″
  • ANSI/ASME B16.47 series A class 400 blind flange dimensions: 22″-48″
  • ANSI/ASME B16.47 series A class 600 blind flange dimensions: 22″-48″
  • ANSI/ASME B16.47 series A class 900 blind flange dimensions: 22″-48″
  • ANSI/ASME B16.47 series B class 75 blind flange dimensions: 26″-48″
  • ANSI/ASME B16.47 series B class 150 blind flange dimensions: 26″-48″
  • ANSI/ASME B16.47 series B class 300 blind flange dimensions: 26″-48″
  • ANSI/ASME B16.47 series B class 400 blind flange dimensions: 26″-36″
  • ANSI/ASME B16.47 series B class 600 blind flange dimensions: 26″-36″
  • ANSI/ASME B16.47 series B class 900 blind flange dimensions: 26″-36″

BS standard:

  • BS 4504 blind flange:

DIN standard:

  • DIN 2527 PN6 blind flange dimensions: DN10-DN1000
  • DIN 2527 PN 10 blind flange dimensions: DN10-DN1000
  • DIN 2527 PN16 blind flange dimensions: DN10-DN2000
  • DIN 2527 PN 25 blind flange dimensions: DN10-DN1000
  • DIN 2527 PN 40 blind flange dimensions: DN10-DN1000

EN standard:

  • EN 1092-1 PN6 blind flange dimensions: DN10-DN2000
  • EN 1092-1 PN10 blind flange dimensions: DN10-DN1200
  • EN 1092-1 PN16 blind flange dimensions: DN10-DN1000
  • EN 1092-1 PN25 blind flange dimensions: DN10-DN600
  • EN 1092-1 PN40 blind flange dimensions: DN10-DN600

JIS standard:

  • JIS B2220 blind flange 5K: 10-750A
  • JIS B2220 blind flange 10K: 10-800A
  • JIS B2220 blind flange 20K: 10-600A
  • JIS B2220 blind flange 30K: 10-400A

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