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Design and production

Length of structure

Flange size

Weld size

Pressure-Temperature

Experiment-test

API 600

ANSI B16.0

ANSI B16.5

ANSI B16.25

ANSI B16.34

API 598

API 6D

API 6D

ANSI B16.5

ANSI B16.25

ANSI B16.34

API 6D

Nominal pressurePN(Lb)

Strength test

Seal test

Gas seal test

MPa

Lbf/in2

MPa

Lbf/in2

MPa

Lbf/in2

150

3.0

430

2.2

315

0.4-0.7

60-100

300

7.7

1110

5.7

815

600

15.3

2220

11.3

630

900

23.0

3330

17.0

2445

1500

38.4

5560

28.2

4080

2500

64.0

9255

47.0

6790

Body, cap, clack

valve handle

sealing surface

spacer (ring)

packing

Operating temperature ℃

Medium

WCB

2Cr13

13Cr
STL
body material 
PTFE
Nylon 
Nylon

Reinforced Flexible Graphite 
13Cr/ Flexible Graphite 
SFB-2
08 soft steel 
F304
F316
F304L
F316L

Flexible Graphite 
Reinforced Flexible Graphite 
SFB/260
SFP/260
PTFE

≤425

WC1

38CrMoAl

≤450

WC6

≤540

water Steam oil

WC9

25Cr2MoV

≤570

C5 C12

≤540

CF8

F304

CF8M

F316

CF3

F304L

≤200

nitric acid acetic acid urea

CF3M

F316L

DN

300Lb male flange RF

mm

in

L

D

D1

D2

b

n-φd

H

D0

15

1/2

140

95

66.5

35

14.2

4-φ16

169

120

20

3/4

152

117

82.5

43

16.0

4-φ19

193

150

25

1

165

123

89.0

51

17.5

4-φ19

230

160

32

1 1/4

178

133

98.5

63

19.0

4-φ19

246

180

40

1 1/2

190

155

114.3

76

20 6

4-φ22.5

283

200

50

2

216

165

127.0

92

22.4

8-φ19

330

220

65

2 1/2

241

190

149.4

105

25.4

8-φ22.5

368

240

80

3

283

210

168.1

127

28.4

8-φ22.5

394

280

100

4

305

254

200.2

157

31.8

8-φ22.5

473

300

125

5

381

279

235.0

186

35.0

8-φ22.5

660

350

150

6

403

318

269.7

216

36.6

12-φ22.5

711

400

200

8

419

381

330.2

270

41.2

12-φ25.4

813

400

250

10

457

444

387.4

324

47.8

16-φ28.5

1003

450

300

12

502

521

450.8

381

50.8

16-φ32

1137

500

350

14

762

584

514.4

413

54.0

20-φ32

1489

600

400

16

838

648

571.5

470

57.2

20-φ35

1580

650

450

18

914

711

628.7

533

60.5

24-φ35

2017

700

500

20

991

775

685.8

584

63.5

24-φ35

2228

700

600

24

1143

914

812.8

692

70.0

24-φ41

2650

750

650

26

1245

867

803.1

736.6

90.0

32-φ35

3219

-

700

28

1346

921

857.3

787.4

90.0

36-φ35

3378

-

750

30

1397

991

902.8

844.6

93.7

36-φ38

3530

-

DN

150Lb male flange RF

mm

in

L

D

D1

D2

b

n-φd

H

D0

15

1/2

108

89

60.5

35

11.2

4-φ16

169

100

20

3/4

117

98

69.9

43

12.7

4-φ16

192

100

25

1

127

108

79.2

51

14.2

4-φ16

230

120

32

11/4

140

117

89.0

63

16.0

4-φ16

246

150

40

11/2

165

127

98.6

73

17.5

4-φ16

283

180

50

2

178

152

120.7

92

19.0

4-φ19

323

200

65

21/2

190

178

139.7

105

22.4

4-φ19

347

220

80

3

203

190

152.4

127

24.0

4-φ19

383

240

100

4

229

229

190 5

157

24.0

8-φ19

457

250

125

5

254

254

216.0

186

24.0

8-φ22.5

632

280

150

6

267

279

241.3

216

25.4

8-φ22.5

635

300

200

8

292

343

298.5

270

28.4

8-φ22.5

762

350

250

10

330

406

362.0

324

30.2

12-φ25.4

892

400

300

12

356

483

431.8

381

32.0

12-φ25.4

1080

450

350

14

381

533

476.3

413

35.0

12-φ29

1295

500

400

16

406

597

539.8

470

36.6

16-φ29

1435

550

450

18

432

635

577.9

533

39.6

16-φ32

1626

600

500

20

457

698

635.0

584

43.0

20-φ32

1829

600

600

24

508

813

749.3

692

47.8

20-φ35

2175

650

650

26

559

786

744.5

711

41.1

36-φ22.5

2235

700

700

28

610

837

795.3

762

44.5

40-φ22.5

2310

750

750

30

610

887

846

813

44.5

44-φ22.5

2695

800

800

32

660

941

900

864

46.0

48-φ22.5

3708

850

900

36

711

1057

1009.7

972

52.3

40-φ25.4

3924

900

1000

40

812

1175

1120.6

1080

55.6

44-φ28.5

4318

950