ASTM A182 F22 Flanges Manufacturer and Supplier in India

Forged from low-alloy 2.25cr 1mo flange material, astm a182 f22 flanges are engineered for extreme high-temperature and high-pressure service in power generation boilers, oil refineries, and heavy petrochemical units. The controlled a182 f22 chemical composition—featuring 2.00–2.50% Chromium and 0.90–1.10% Molybdenum—delivers superior creep-rupture strength, hydrogen resistance, and thermal stability up to 600°C. Under ASME B16.5 and B16.47 manufacturing standards, we supply critical line connections including high-stress f22 weld neck flange, low-pressure f22 slip on flange, and dead-end f22 blind flange configurations from Class 150 to Class 2500 ratings. Available in normalized-tempered a182 f22 class 1 flanges and high-tensile a182 f22 class 3 flanges, each sa182 f22 flange provides exceptional a182 f22 mechanical properties matching international a182 f22 equivalent designations such as uns k21590 and Werkstoff 1.7380 flange standards (10CrMo9-10).

Solitaire Overseas is a globally recognized stockist, manufacturer, and exporter of high-precision industrial forgings and alloy piping components. We supply fully certified high-pressure piping solutions to international markets with 100% EN 10204 3.1 material test report traceability.

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Technical Data

Specification of ASTM A182 F22 Flanges

Parameter Specification

Material Grade

F22 (2.25Cr-1Mo)

ASTM Standard

ASTM A182

ASME Standard

ASME B16.5, ASME B16.47

Size Range

1/2" NB to 48" NB

Pressure Class

Class 150 to Class 2500

Facing Types

RF, FF, RTJ

Chemical Composition of A182 F22 Alloy Steel Flanges

Grade C Mn P max S max Si Cr Mo

ASTM A182 F22

0.05 to 0.15

0.30 to 0.60

0.040

0.040

0.50 max

2.00 to 2.50

0.87 to 1.13

Mechanical Properties of Alloy Steel F22 / K21590 Flanges

Property Class 1 Class 3

Tensile strength, min

415 MPa (60 ksi)

515 MPa (75 ksi)

Yield strength, min

205 MPa (30 ksi)

310 MPa (45 ksi)

Elongation, min

20 percent

20 percent

Hardness

170 HBW max

156 to 207 HBW

A182 F22 Class 1 Flanges Dimensions with Tolerances

NPS O.D. of Flange Flanges Thickness Diameter of RF Diameter of Hub at Base Lengtd Tdru Hub Bore or Diameter Dia. of Hub at Bevel Radius of Fillet Deptd of Socket
Welding (WN) Neck Slip-On (SORF) Threaded (NPT) Socket (SWRF) Lap Joint (Loose) Slip-on (SORF) Socket (SWRF) Lap Joint (Loose)
O Q R X Y Y Y W B H r Z

1/2

3-1/2

7/16

1-3/8

1-3/16

1-7/8

5/8

5/8

.88

.90

.84

1/8

3/8

3/4

3-7/8

1/2

1-11/16

1-1/2

2-1/16

5/8

5/8

1.09

1.11

1.05

1/8

7/16

1

4-1/4

9/16

2

1-15/16

2-3/16

11/16

11/16

1.36

1.38

1.32

1/8

1/2

1-1/4

4-5/8

5/8

2-1/2

2-5/16

2-1/4

13/16

13/16

1.70

1.72

1.66

3/16

9/16

1-1/2

5

11/16

2-7/8

2-9/16

2-7/16

7/8

7/8

1.95

1.97

1.90

1/4

5/8

2

6

3/4

3-5/8

3-1/16

2-1/2

1

1

2.44

2.46

2.38

5/16

11/16

2-1/2

7

7/8

4-1/8

3-9/16

2-3/4

1-1/8

1-1/8

2.94

2.97

2.88

5/16

3/4

3

7-1/2

15/16

5

4-1/4

2-3/4

1-3/16

1-3/16

3.57

3.60

3.50

3/8

13/16

3-1/2

8-1/2

15/16

5-1/2

4-13/16

2-13/16

1-1/4

1-1/4

4.07

4.10

4.00

3/8

7/8

4

9

15/16

6-3/16

5-5/16

3

1-5/16

1-5/16

4.57

4.60

4.50

7/16

15/16

5

10

15/16

7.5/16

6-7/16

3-1/2

1-7/16

1-7/16

5.66

5.69

5.56

7/16

15/16

6

11

1

8-1/2

7-9/16

3-1/2

1-9/16

1-9/16

6.72

6.75

6.63

1/2

1-1/16

8

13-1/2

1-1/8

10-5/8

9-11/16

4

1-3/4

1-3/4

8.72

8.75

8.63

1/2

1-1/4

10

16

1-3/16

12-3/4

12

4

1-15/16

1-15/16

10.88

10.92

10.75

1/2

1-5/16

12

19

1-1/4

15

14-3/8

4-1/2

2-3/16

2-3/16

12.88

12.92

12.75

1/2

1-9/16

14

21

1-3/8

16-1/4

15-3/4

5

2-1/4

3-1/8

14.14

14.18

14.00

1/2

1-5/8

16

23-1/2

1-7/16

18-1/2

18

5

2-1/2

3-7/16

16.16

16.19

16.00

1/2

1-3/4

18

25

1-9/16

21

19-7/8

5-1/2

2-11/16

3-13/16

18.18

18.20

18.00

1/2

1-15/16

20

27-1/2

1-11/16

23

22

5-11/16

2-7/8

4-1/16

20.20

20.25

20.00

1/2

2-1/8

24

32

1-7/8

27-1/4

26-1/8

6

3-1/4

4-3/8

24.25

24.25

24.00

1/2

2-1/2

Applications of ASTM A182 F22 Flanges

ASTM A182 Grade F22 low-alloy 2.25cr 1mo flange units are specified for extreme severe-service operating conditions across major process industries:

  • Power Generation & Ultra-Supercritical Steam Lines: Connecting main steam headers, superheaters, and boiler tubes using the high-stress f22 weld neck flange for maximum creep-rupture performance.
  • Oil & Gas Hydroprocessing Units: Installed in high-pressure hydrocrackers, reactors, and refinery distillation columns where resistance to high-temperature hydrogen attack (HTHA) is essential.
  • Petrochemical & Chemical Processing: Connecting high-pressure heat exchangers and reactors utilizing a182 f22 class 3 flanges to handle intense thermal cyclic stresses.
  • Heavy Industrial Piping Systems: Terminating or directing elevated-temperature lines using precision-machined f22 slip on flange and f22 blind flange components across Class 150 through 2500 ratings.
  • Offshore & Marine Boilers: Delivering high mechanical integrity under harsh steam service conditions matching uns k21590 and 1.7380 flange specifications.

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Frequently Asked Questions 

It is a low-alloy 2.25Cr 1Mo flange material (UNS K21590) engineered for high-temperature, high-pressure service requiring exceptional creep strength and hydrogen resistance.

The key difference is heat treatment and strength: normalized-tempered a182 f22 class 3 flanges offer significantly higher tensile and yield strength than a182 f22 class 1 flanges.

ASTM A182 F22 contains 2.25% Chromium and 1% Molybdenum, providing superior creep-rupture strength, higher temperature limits (up to 600°C), and greater hydrogen resistance than 1.25Cr-0.5Mo F11.

The a182 f22 equivalent designations include uns k21590, Werkstoff 1.7380 flange (10CrMo9-10), EN 10083-3, BS 1503-620 Gr 622, and sa182 f22 flange standard codes.

An astm a182 f22 flanges assembly operates reliably up to 600°C (1112°F) in power generation and steam lines without sacrificing mechanical properties or thermal stability.

Yes, post-weld heat treatment (PWHT) at 650°C–700°C is required for an f22 weld neck flange to relieve residual stress, temper the HAZ, and prevent cracking.

Related products: Alloy Steel Flanges, Alloy Steel Products, Alloy Steel Pipes, Alloy Steel Tubes, Alloy Steel Fittings, Flange Weight Calculator.

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Solitaire Overseas is a trusted global stockist and exporter supplying certified ASTM A182 F22 Class 1 and Class 3 alloy steel flanges with 100% EN 10204 3.1 material test reports, NDT inspection, and immediate worldwide dispatch.

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