ASME B16.5 Hastelloy X SO Flange Dimension

Mar 04, 2026

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Hastelloy X (UNS N06002) is a nickel-chromium-iron-molybdenum alloy with exceptional high-temperature strength, oxidation resistance up to 2200°F, and excellent fabricability. It resists carburization and stress-corrosion cracking in aggressive environments, making it the preferred material for gas turbine components, industrial furnace parts, chemical retorts, and high-temperature piping systems.

 

ASME B165 Hastelloy X SO Flange

 

Slip-On (SO) flanges per ASME B16.5 are economical and easy to install. The pipe slips into the flange bore and is fillet-welded inside and outside. These flanges suit moderate-pressure, non-critical services where full penetration welding is not required.

 

All dimensions below conform to ASME B16.5 for Class 150 and Class 300 raised-face slip-on flanges. Material is supplied to ASTM B564 UNS N06002.

 

ASME B16.5 Class 150 Hastelloy X Slip-On Flange Dimensions

 

NPS

OD (O)

Thickness (T)

Raised Face (R)

Length thru Hub (Y)

Hub OD (X)

Bore (B)

Weight (lb)

Bolt Circle (C)

No. Holes

Hole Dia

1/2

3.50

0.44

1.38

0.63

1.19

0.88

1

2.38

4

0.63

3/4

3.88

0.50

1.69

0.63

1.50

1.09

2

2.75

4

0.63

1

4.25

0.56

2.00

0.69

1.94

1.36

2

3.13

4

0.63

1-1/4

4.63

0.63

2.50

0.81

2.31

1.70

3

3.50

4

0.63

1-1/2

5.00

0.69

2.88

0.88

2.56

1.95

3

3.88

4

0.63

2

6.00

0.75

3.63

1.00

3.06

2.44

5

4.75

4

0.75

2-1/2

7.00

0.88

4.13

1.13

3.56

2.94

7

5.50

4

0.75

3

7.50

0.94

5.00

1.19

4.25

3.57

8

6.00

4

0.75

3-1/2

8.50

0.94

5.50

1.25

4.81

4.07

11

7.00

8

0.75

4

9.00

0.94

6.19

1.31

5.31

4.57

13

7.50

8

0.75

5

10.00

0.94

7.31

1.44

6.44

5.66

15

8.50

8

0.88

6

11.00

1.00

8.50

1.56

7.56

6.72

19

9.50

8

0.88

8

13.50

1.13

10.63

1.75

9.69

8.72

30

11.75

8

0.88

10

16.00

1.19

12.75

1.94

12.00

10.88

43

14.25

12

1.00

12

19.00

1.25

15.00

2.19

14.38

12.88

64

17.00

12

1.00

14

21.00

1.38

16.25

2.25

15.75

14.14

90

18.75

12

1.13

16

23.50

1.44

18.50

2.50

18.00

16.16

98

21.25

16

1.13

18

25.00

1.56

21.00

2.69

19.88

18.18

130

22.75

16

1.25

20

27.50

1.69

23.00

2.88

22.00

20.20

165

25.00

20

1.25

24

32.00

1.88

27.25

3.25

26.13

24.25

220

29.50

20

1.38

 

ASME B16.5 Class 300 Hastelloy X Slip-On Flange Dimensions

 

NPS

OD (O)

Thickness (T)

Raised Face (R)

Length thru Hub (Y)

Hub OD (X)

Bore (B)

Weight (lb)

Bolt Circle (C)

No. Holes

Hole Dia

1/2

3.75

0.56

1.38

0.88

1.50

0.88

2

2.63

4

0.63

3/4

4.63

0.63

1.69

1.00

1.88

1.09

3

3.25

4

0.75

1

4.88

0.69

2.00

1.06

2.13

1.36

3

3.50

4

0.75

1-1/4

5.25

0.75

2.50

1.06

2.50

1.70

4

3.88

4

0.75

1-1/2

6.13

0.81

2.88

1.19

2.75

1.95

6

4.50

4

0.88

2

6.50

0.88

3.63

1.31

3.31

2.44

7

5.00

8

0.75

2-1/2

7.50

1.00

4.13

1.50

3.94

2.94

10

5.88

8

0.88

3

8.25

1.13

5.00

1.69

4.63

3.57

13

6.63

8

0.88

3-1/2

9.00

1.19

5.50

1.75

5.25

4.07

17

7.25

8

0.88

4

10.00

1.25

6.19

1.88

5.75

4.57

22

7.88

8

0.88

5

11.00

1.38

7.31

2.00

7.00

5.66

28

9.25

8

0.88

6

12.50

1.44

8.50

2.06

8.13

6.72

39

10.63

12

0.88

8

15.00

1.63

10.63

2.44

10.25

8.72

58

13.00

12

1.00

10

17.50

1.88

12.75

2.62

12.63

10.88

81

15.25

16

1.13

12

20.50

2.00

15.00

2.88

14.75

12.88

115

17.75

16

1.25

14

23.00

2.13

16.25

3.00

16.75

14.14

165

20.25

20

1.25

16

25.50

2.25

18.50

3.25

19.00

16.16

190

22.50

20

1.38

18

28.00

2.38

21.00

3.50

21.00

18.18

250

24.75

24

1.38

20

30.50

2.50

23.00

3.75

23.13

20.20

315

27.00

24

1.38

24

36.00

2.75

27.25

4.19

27.63

24.25

475

32.00

24

1.63

 

Notes

 

All flanges supplied with 0.06 in (1.6 mm) raised face unless specified flat-face.

 

Weights are approximate for Hastelloy X (density 0.297 lb/in³).

 

Tolerances and marking per ASME B16.5.

 

Available in higher classes (600–2500) and other facing types on request.

 

Our factory produces these Hastelloy X slip-on flanges with full material traceability, ultrasonic testing, and PMI verification. We maintain large stock in common sizes and can deliver custom or large-diameter flanges quickly.

 

For quotations, technical support, or special requirements (e.g., RTJ facing, larger NPS, or matching Schedule pipe), contact our team today. We deliver reliable, high-performance nickel alloy solutions.

 

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