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Flanges


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Summary of material used for flanges
MATERIAL ASME/ANSI B16.5ASME B16.47
SERIES A (MSS SP-441
ASME B16.47
SERIES B (or API 6052)
BS 4504 BS 3293 BS 103
Forging(ASTM A182)------
Plate (ASTM A240)4------
Bar5------
Casting6------


Note :
  • MSS SP-44 flanges are designated series A flanges in ASME B16.47.
  • API 605 has been cancelled. API 605 flanges are designated series B flanges in ASME B16.47.
  • BS 10, although obsolete, remains in use for light weight economy stainless steel flanges.
  • Within specification ANSI B16.5, plate can only be used to provide blind flanges.
  • Most small BS 10 flanges are made from bar.
  • Castings are not included in this manual.
Materials:
Most standard specify the material from which the flanges is produced. The purchaser should specify the exact requirements.

Flange Size:
All sizes and grades compatible to standard pipe flanges and wall thicknesses (pressure ratings) are available. The table bellow provides a summary.

Flange Face:
There are various face configurations for flanges. Typically: flat face, raised face, tongue and groove, and ring joint.

Face Finish:
The finish on the face of a flange is measured as an Arithmetical Average Roughness Height (AARH). The finish is determined by the standard used. For example, ANSI B16.5 specifies face finishes within a range 125AARH - 500AARH (3.2 Ra to 12.5 Ra). Other finishes are available on request, for example 1.6 Ra Max. 1.6/3.2 Ra, 3.2/6.3 Ra or 6.3/12.5 Ra. The range 3.2/6.3 is most common.


Summary of flanges size specified by common standards
FLANGE TYPE ASME/ANSI B16.5 ASME B16.47
Series A (or MSS SP-441)
ASME B16.47
Series B (or API 6052)
BS 4504
(ISO 7005-1)
BS 3293
Nominal Pipe Sizes
Class (lb)Class (lb)Class (lb)PN (bar)Class (lb)
Weld Neck150 - 2500150 - 90075 - 9002.5 - 40150 - 600
Slip-on150 - 2500--2.5 - 40150 - 600
Blind150 - 2500300 - 900300-9002.5 - 40-
Lap Joint150 - 2500--2.5 - 40-
Socket Weld150 - 2500--N/A-
Threaded150 - 2500--6 - 40-
Flat/Raise FacingsAs aboveAs aboveAs aboveAs aboveAs above
Ring Joint Facings150 - 2500300 - 900300 - 9002.5 - 40300 - 600
Other Facings150 - 2500--2.5 - 40-


Note :
  • MSS SP-44 flanges are designated series A flanges in ASME B16.47. It also covers flanges in the range NPS 12 to 24, these being equivalent to ASME /ANSI B16.5 flanges in the same range (except for the addition of NPS 22 in MSS SP-44).
  • API 605 has been cancelled. API 605 flanges are designated series B flanges in ASME B16.47. Ranges quoted are based on ASME B16.47 series B.
  • Dimension not covered in this summary.

ANSI Standard Flanges


ANSI Standard Flanges


Size :1/2" TO 16"
Type :WNRF, SORF, BLRF, Threaded etc
Dimension :ASME B 16.5
Material : SS304, SS304L, SS316, SS316L, SS316Ti, SS321
Pressure Rating :150#, 300#, 600#, 900#, 1500#, 2500# Class





DIN Standard Flanges


DIN Standard Flanges

DescriptionRated Pressure / PresiĆ³n Nominal / Nenndruck (in bar) (1 bar = 14.5 psi)

12.561016254064100160250320400

DIN
Blind Flanges

2527252725272527252725272527



Slipon Flanges

25732576








Welding neck flanges2630263026312632263326342635263626372638262826292627
Threaded flanges with neck

2565256625662567256725682569



Material :-1.4301, 1.4306, 1.4401, 1.4404, 1.4571, 1.4841, 1.4541






JIS Stadard Flanges


Jis Stadard Flanges

JIS STANDARD, MATERIAL : SUS 304 & 316 MADE BY SAND CASTING OR FORGED THREAD CONFORM TO BS21, 1973 TAPER THREAD.
Unit : mm













DIM.\N.P.S.1520253240 5065 80100125150200250
A5K808595115120130155180200235265320385
1













010K95100125135140155175185210250280330400
B5K30364554607694108134164196244288
1.5













010K30364554607694108134164196244288
C5K6065759095105130145165200230280345
0.510K707590100105120140150175210240290355
D5K9101012121414141616182022
2













010K12141416161618181820222224
E5K22.227.734.543.249.161.177.190115.4141.2166.6218269.5
1













010K22.227.734.543.249.161.177.190115.4141.2166.6218269.5
F5K1112222222222
0.210K1112222222222
R5K485262727888112125145180210255320
110K5258708085100120130155185215265325
N5K444444448881212

10K444444488881212

5K12121215151515191919192323
0.5













010K15151919191919191923232323
Y5K16181821212226303535384044
1.510K16181821212226303535384044





BS Standard Flanges


BS Standard Flanges


Size :10 NB to 400 NB
Type :Slipon, Weldneck, Blind etc
Dimension :BS4504, BS 10 T - D, E, F etc.
Material : SS304, SS304L, SS316, SS316L, SS316Ti, SS321
Pressure Rating :PN5, PN10, PN16, etc.

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