Threaded Flange

What is a threaded flange?

Threaded flange is also called screwed flange,it is similar to slip-on flange,but the inner bore is thread.The threaded flange is connected to a pipe with a external thread on the pipe end,so the flange thread should has the same thread specification with the pipe thread.Threaded flanges are easily to assembly without welding in the piping system and they are often used for small diameter,high pressure requirements.

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Specifications of threaded flange:

Table of Content 隐藏
1 Specifications of threaded flange:
1.1 Materials of threaded flange:
1.2 Sealing face of threaded flange:

ANSI/ASME standard:

  • ANSI/ASME B16.5 class 150 threaded flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 300 threaded flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 400 threaded flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 600 threaded flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 900 threaded flange dimensions: ½”-24″
  • ANSI/ASME B16.5 class 1500 threaded flange dimensions: ½”-2½”

BS standard:

  • BS 10 table D screwed flange dimensions: ½”-12″
  • BS 4504 PN6 hubbed threaded flange dimensions: DN10-DN300
  • BS 4504 PN16 hubbed threaded flange dimensions: DN10-DN1000
  • BS 4504 PN40 hubbed threaded flange dimensions: DN10-DN600

DIN standard:

  • DIN 2565 PN6 threaded flange: DN6-DN200
  • DIN 2566 PN10 threaded flange: DN6-DN150
  • DIN 2566 PN16 threaded flange: DN6-DN150

EN standard:

  • EN 1092-1 PN6 hubbed threaded flange: DN10-DN300
  • EN 1092-1 PN10 hubbed threaded flange: DN10-DN600
  • EN 1092-1 PN16 hubbed threaded flange: DN10-DN1000
  • EN 1092-1 PN25 hubbed threaded flange: DN10-DN600
  • EN 1092-1 PN40 hubbed threaded flange: DN10-DN600
  • EN 1092-1 PN63 hubbed threaded flange: DN10-DN150
  • EN 1092-1 PN100 hubbed threaded flange: DN10-DN150

SABS standard:

  • SABS 1123 MPa threaded flange: DN10-DN150

Materials of threaded flange:

Carbon steel:

  • ASTM A105 threaded flange
  • ASTM A350 LF2 threaded flange
  • SS400 threaded flange
  • P235GH threaded flange
  • P250GH threaded flange
  • C22.8 threaded flange
  • Q235 threaded flange

Stainless steel:

  • ASTM A182 F304 threaded flange
  • ASTM A182 F304L threaded flange
  • ASTM A182 F316 threaded flange
  • ASTM A182 F316L threaded flange
  • ASTM A182 F321 threaded flange
  • ASTM A182 F347 threaded flange

Alloy steel:

  • ASTM A694 F42 threaded flange
  • ASTM A694 F46 threaded flange
  • ASTM A694 F52 threaded flange
  • ASTM A694 F56 threaded flange
  • ASTM A694 F60 threaded flange
  • ASTM A694 F65 threaded flange
  • ASTM A694 F70 threaded flange
  • ASTM A182 F5 threaded flange
  • ASTM A182 F9 threaded flange
  • ASTM A182 F11 threaded flange
  • ASTM A182 F12 threaded flange
  • ASTM A182 F22 threaded flange
  • ASTM A182 F91 threaded flange

Sealing face of threaded flange:

Threaded pipe flanges are typically provided with a raised face, flat face, or RTJ facing.When a raised face is necessary for threaded pipe flanges,the standard height is 1/16″ for threaded pipe flanges under 400#.For threaded pipe flanges of 400# and up, the standard threaded pipe flange raised face height is 1/4″.

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