BS 4504 Standard Flange Facing Dimensions

PDF: BS 4504 FLANGE FACING DIMENSIONS

Flange Facings – BS 4504

BS 4504 flange facing types A to H are defined below.The dimensions vary with pipe size (DN) and pressure rating (PN) as detailed in the following table.

BS-4504-Standard-Flange-Facings-Types

BS-4504-Standard-Flange-Facings-Types

Flange facing dimensions (BS 4504) .

DN

A

mm

     

Face Dimensions

     

PN 2.5

PN 6

PN 10

PN 16

PN 25

PN 40

B

mm

C

mm

D

mm

E

mm

a

mm

b

mm

c

mm

d mm

αmm

e

mm

10

35

35

40

40

40

40

34

35

24

23

2

4

3

2

5

15

40

40

45

45

45

45

39

40

29

28

2

4

3

2

5

20

50

50

58

58

58

58

50

51

36

35

2

4

3

2

41°16′

5

25

60

60

68

68

68

68

57

58

43

42

2

4

3

2

41°16′

5

32

70

70

78

78

78

78

65

66

51

50

2

4

3

2

41°16′

5

40

80

80

88

88

88

88

75

76

61

60

3

4

3

2

41°16′

5

50

90

90

102

102

102

102

87

88

73

72

3

4

3

2

41°16′

5

65

110

110

122

122

122

122

109

110

95

94

3

4

3

2

41°16′

5

80

128

128

138

138

138

138

120

121

106

105

3

4

3

2

41°16′

5

100

148

148

158

158

162

162

149

150

129

128

3

4.5

3.5

2.5

32°15′

6

125

178

178

188

188

188

188

175

176

155

154

3

4.5

3.5

2.5

32°15′

6

150

202

202

212

212

218

218

203

204

183

182

3

4.5

3.5

2.5

32°15′

6

200

258

258

268

268

278

285

259

260

239

238

3

4.5

3.5

2.5

32°15′

6

250

312

312

320

320

335

345

312

313

292

291

3

4.5

3.5

2.5

32°15′

6

300

365

365

370

378

395

410

363

364

343

342

4

4.5

3.5

2.5

32°15′

6

350

415

415

430

438

450

465

421

422

395

394

4

5

4

3

27°24′

7

400

465

465

482

490

505

535

473

474

447

446

4

5

4

3

27°24′

7

450

520

520

532

550

555

560

523

524

497

496

4

5

4

3

27°24′

7

500

570

570

585

610

615

615

575

576

549

548

4

5

4

3

27°24′

7

600

670

670

685

725

720

735

675

676

649

648

5

5

4

3

27°24′

7

700

775

775

800

795

820

777

778

751

750

5

5

4

3

27°24′

7

800

880

880

905

900

930

882

883

856

855

5

5

4

3

27°24′

7

900

980

980

1005

1000

1030

987

988

961

960

5

5

4

3

27°24′

7

1000

1080

1080

1110

1115

1140

1092

1094

1062

1060

5

6

5

4

28°39′

8

1200

1280

1295

1330

1330

1350

1292

1294

1262

1260

5

6

5

4

28°39′

8

1400

1480

1510

1535

1530

1560

1492

1494

1462

1460

5

6

5

4

28°39′

8

1600

1690

1710

1760

1750

1780

1692

1694

1662

1660

5

6

5

4

28°39′

8

1800

1890

1920

1960

1950

1985

1982

1894

1862

1860

5

6

5

4

28°39′

8

2000

2090

2125

2170

2150

2210

2092

2094

2062

2060

5

6

5

4

28°39′

8

X

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