Inconel 625 Flanges Manufacturer & Supplier in India

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Inconel 625 Flanges Manufacturer & Supplier in India

Inconel 625 Flanges

Kalpataru Piping Solution is a trusted manufacturer, Inconel 625 flange supplier, stockist, and Inconel 625 flanges exporter, manufacturing flanges as per the ASTM B564 and ASME SB564 and dimensional standards like ASME B16.5, B16.47, and EN 1092-1. Made from nickel chromium molybdenum niobium alloy stock that is the same heat resistant, corrosion proof material used in offshore platforms, chemical processing plants, marine systems and aerospace, our Alloy 625 flanges, also known as UNS N06625 / WNR 2.4856, are precision formed from certified alloy stock. Our Nickel Alloy 625 flanges are also known as Alloy 625 Flanges and are available in all the standard flanges and can be dispatched on same day.

All the ASTM B564 Inconel 625 flanges supplied are traceable to heat and lot numbers with Mill Test Certificates (MTC) as per EN 10204 3.1 and can be third party inspected by TUV, Bureau Veritas, Lloyds and SGS. From single weld neck flange to bulk project quantity, we have ready stock of blind, slip on and RTJ flange to export it to 80 plus countries around the world from Mumbai, India. For the wider Inconel flange product range, see our Inconel Flanges hub or browse related Super Duplex Steel Flanges.

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Table of Contents

What Are Inconel 625 Flanges

Inconel 625 weld neck flanges and other flange types are high performance pipe connection components manufactured from Nickel Alloy 625, a nickel chromium molybdenum alloy strengthened by niobium and tantalum additions. Unlike standard stainless steel flanges, Inconel 625 flanges derive their exceptional strength from solid solution hardening rather than precipitation hardening, making them dimensionally stable across a wide temperature spectrum from cryogenic (minus 196 degrees Celsius) service all the way up to 982 degrees Celsius (1800 degrees Fahrenheit) continuous service.

The alloy’s outstanding resistance to pitting, crevice corrosion, intergranular attack, and chloride induced stress corrosion cracking makes UNS N06625 flanges the preferred choice wherever standard materials fail prematurely, including seawater piping, FGD scrubbers, sour gas lines, and aggressive acid service environments.

Specification of Inconel 625 Flanges

Parameter

Details

Material Standard

ASTM B564 / ASME SB564

UNS Number

N06625

Werkstoff Nr.

2.4856

Dimensional Standards

ASME B16.5, B16.47 Series A & B, B16.48, EN 1092-1, DIN, BS 10, BS 4504

Size Range

1/2 inch (15 NB) to 48 inch (1200 NB)

Pressure Classes

Class 150, 300, 400, 600, 900, 1500, 2500 | PN6 to PN160

Flange Face Types

RF, FF, RTJ, LJF, MF, TG, LMF, SMF

Production Method

Forged, heat treated and precision machined

Test Certifications

MTC EN 10204 3.1 | NABL Approved Lab | Third party inspection available

HS Code

75072000

Types of Inconel 625 Flanges

Review the diverse forms and flange types available in Inconel 625 Flanges, designed for versatile industrial connections and sealing requirements (existing product photography to be retained for each type):

  •       Inconel 625 weld neck flanges (standard and long weld neck)
  •       Inconel 625 slip on flanges (raised face)
  •       Inconel 625 blind flanges and spectacle blind flanges
  •       Threaded (screwed) flanges
  •       Socket weld flanges
  •       Lap joint flanges
  •       Ring type joint (RTJ) flanges
  •       Reducing flanges
  •       Orifice flanges
  •       Tongue and groove flanges
  •       Square flanges, nipo flanges, bleed ring flanges, plate flanges

Chemical Composition of Inconel 625 / UNS N06625 Flanges

Element

Symbol

Min (%)

Max (%)

Nickel

Ni

58.0

Balance

Chromium

Cr

20.0

23.0

Molybdenum

Mo

8.0

10.0

Niobium + Tantalum

Nb+Ta

3.15

4.15

Iron

Fe

N/A

5.0

Carbon

C

N/A

0.10

Manganese

Mn

N/A

0.50

Silicon

Si

N/A

0.50

Sulfur

S

N/A

0.015

Aluminum

Al

N/A

0.40

Titanium

Ti

N/A

0.40

Cobalt

Co

N/A

1.0

Mechanical Properties of ASTM B564 Inconel 625 Flanges

Property

Imperial (psi)

Metric (MPa or g/cm3)

Tensile Strength (min)

135,000 psi

930 MPa

Yield Strength – 0.2% offset (min)

75,000 psi

517 MPa

Elongation (min)

30%

30%

Hardness (Brinell max)

N/A

220 HB max

Density

0.305 lb/in3

8.44 g/cm3

Melting Range

2350 to 2460 deg F

1290 to 1350 deg C

Max Operating Temperature

1800 deg F

982 deg C

The 220 HB max hardness rating confirms compliance with NACE MR0175/ISO 15156 requirements for sour service environments.

Physical Properties of Nickel Alloy 625 Flanges

Physical Property

Value

Density

8.44 g/cm3

Melting Point Range

1290 to 1350 degrees C

Specific Heat Capacity

410 J/kg K (at 21 degrees C)

Thermal Conductivity

9.8 W/m K (at 25 degrees C)

Electrical Resistivity

1.29 microohm metres

Modulus of Elasticity

207 GPa (30 x 10 to the 6 psi)

Coefficient of Thermal Expansion

12.8 micrometres per m per degree C (21 to 538 degrees C)

Inconel 625 / ASTM B564 UNS N06625 Equivalent Grades by International Standard

Alloy

UNS

WNR

EN

JIS

BS

AFNOR

GOST

Inconel 625

N06625

2.4856

NiCr22Mo9Nb

NCF 625

NA 21

NC22DNB4M

ХН75МБТЮ

International Standards & HS Code of Alloy 625 Flanges

Parameter

Details

UNS Number

N06625

International Material Number

Werkstoff Nr. 2.4856

Material Specification

ASTM B564 / ASME SB564

HS Code

75072000

Pressure Ratings & Classes of Inconel 625 Flanges (bar)

Working pressures in bar by ASME B16.5 pressure class, sorted in ascending temperature order.

Temp (deg C)

Class 150

Class 300

Class 400

Class 600

Class 900

Class 1500

Class 2500

-29 to 38

20.0

51.7

68.9

103.4

155.1

258.6

430.9

50

19.5

51.7

68.9

103.4

155.1

258.6

430.9

100

17.7

51.5

68.7

103.0

154.6

257.6

429.4

150

15.8

50.3

66.8

100.3

150.6

250.8

418.2

200

13.8

48.6

64.8

97.2

145.8

243.4

405.4

250

12.1

46.3

61.7

92.7

139.0

231.8

386.2

300

10.2

42.9

57.0

85.7

128.6

214.4

357.1

325

9.3

41.4

55.0

82.6

124.0

206.6

344.3

350

8.4

40.3

53.6

80.4

120.7

201.1

335.3

375

7.4

38.9

51.6

77.6

116.5

194.1

323.2

400

6.5

36.5

48.9

73.3

109.8

183.1

304.9

425

5.5

35.2

46.5

70.0

105.1

175.1

291.6

450

4.6

33.7

45.1

67.7

101.4

169.0

281.8

475

3.7

31.7

42.3

63.4

95.1

158.2

263.9

500

2.8

28.2

37.6

56.5

84.7

140.9

235.0

538

1.4

16.5

22.1

33.1

49.6

82.7

137.9

550

N/A

13.9

18.6

27.9

41.8

69.7

116.2

575

N/A

9.4

12.6

18.9

28.3

47.2

78.6

600

N/A

6.6

8.9

13.3

19.9

33.2

55.3

625

N/A

5.1

6.8

10.3

15.4

25.7

42.8

650

N/A

4.7

6.3

9.5

14.2

23.6

39.4

          

Dimension Chart of Alloy 625 Slip On & Socket Weld Flanges (ASME B16.5, Class 150)

All dimensions in inches.

NPS

Flange OD (O)

Raised Face Dia (R)

Thickness (Q)

Hub Base Dia (X)

Hub Bevel Dia (H)

Socket Depth (Z)

1/2

3-1/2

1-3/8

7/16

1-3/16

.84

3/8

3/4

3-7/8

1-11/16

1/2

1-1/2

1.05

7/16

1

4-1/4

2

9/16

1-15/16

1.32

1/2

1-1/4

4-5/8

2-1/2

5/8

2-5/16

1.66

9/16

1-1/2

5

2-7/8

11/16

2-9/16

1.90

5/8

2

6

3-5/8

3/4

3-1/16

2.38

11/16

2-1/2

7

4-1/8

7/8

3-9/16

2.88

3/4

3

7-1/2

5

15/16

4-1/4

3.50

13/16

4

9

6-3/16

15/16

5-5/16

4.50

15/16

6

11

8-1/2

1

7-9/16

6.63

1-1/16

8

13-1/2

10-5/8

1-1/8

9-11/16

8.63

1-1/4

10

16

12-3/4

1-3/16

12

10.75

1-5/16

12

19

15

1-1/4

14-3/8

12.75

1-9/16

14

21

16-1/4

1-3/8

15-3/4

14.00

1-5/8

16

23-1/2

18-1/2

1-7/16

18

16.00

1-3/4

18

25

21

1-9/16

19-7/8

18.00

1-15/16

20

27-1/2

23

1-11/16

22

20.00

2-1/8

24

32

27-1/4

1-7/8

26-1/8

24.00

2-1/2

Flange Drilling Chart (Bolt Pattern Data by Standard & Class)

StandardClassDiaNo. BoltsBolt Circle DiaBolt Hole DiaBolt Size
AS4087 FlangePN149546714M12
ANSI B16.5ANSI 150894601613
ANSI B16.5ANSI 300954671613
ANSI B16.5ANSI 600954671613
ANSI B16.5ANSI 9001214832219
ANSI B16.5ANSI 15001214832219
AS 2129Table C954671413
AS 2129Table D954671413
AS 2129Table E954671413
AS 2129Table F954671413
AS 2129Table H1144831716
AS 2129Table J1144831716
ISO 7005 (DIN)PN68045511M10
ISO 7005 (DIN)PN109546514M12
ISO 7005 (DIN)PN169546514M12
ISO 7005 (DIN)PN2090460.516M14
ISO 7005 (DIN)PN259546514M12
ISO 7005 (DIN)PN409546514M12

Thickness of UNS N06625 Blind & Spectacle Blind Flanges (inches)

NPSODSTD WallEXT HvySch 10Sch 20Sch 30Sch 40Sch 80Sch 120Sch 160XX Hvy
1/20.840.1090.1470.083N/AN/A0.1090.147N/A0.1880.294
3/41.050.1130.1540.083N/AN/A0.1130.154N/A0.2190.308
11.3150.1330.1790.109N/AN/A0.1330.179N/A0.250.358
1-1/41.660.140.1910.109N/AN/A0.140.191N/A0.250.382
1-1/21.90.1450.20.109N/AN/A0.1450.2N/A0.2810.4
22.3750.1540.2180.109N/AN/A0.1540.218N/A0.3440.436
33.50.2160.30.12N/AN/A0.2160.3N/A0.4380.6
44.50.2370.3370.12N/AN/A0.2370.3370.4380.5310.674
66.6250.280.4320.134N/AN/A0.280.4320.5620.7190.864
88.6250.3220.50.1480.250.2770.3220.50.7190.9060.875
1010.750.3650.50.1650.250.3070.3650.5940.8441.1251.0
1212.750.3750.50.180.250.330.4060.6881.01.3121.0
1414.00.3750.50.250.3120.3750.4380.751.0941.406N/A
1616.00.3750.50.250.3120.3750.50.8441.2191.594N/A
1818.00.3750.50.250.3120.4380.5620.9381.3751.781N/A
2020.00.3750.50.250.3750.50.5941.0311.51.969N/A
2424.00.3750.50.250.3750.5620.6881.2191.8122.344N/A
3030.00.3750.50.3120.50.625N/AN/AN/AN/AN/A
3636.00.3750.50.3120.50.6250.75N/AN/AN/AN/A

Indicative Weight Chart of Inconel 625 Weld Neck Flanges (Class 150, ASME B16.5)

NPS (in)

OD (in)

Flange OD (in)

No. of Bolts

Approx. Weight (kg)

1/2

0.84

3.50

4

0.45

1

1.32

4.25

4

0.91

2

2.38

6.00

4

1.82

3

3.50

7.50

4

3.63

4

4.50

9.00

8

5.90

6

6.63

11.00

8

10.43

8

8.63

13.50

8

17.24

10

10.75

16.00

12

27.22

12

12.75

19.00

12

38.56

14

14.00

21.00

12

50.35

16

16.00

23.50

16

64.86

18

18.00

25.00

16

81.65

20

20.00

27.50

20

102.06

24

24.00

32.00

20

145.15

Flange Faces & Gasket Sizes of Alloy 625 Flanges (RF, FF, RTJ)

NPS

Gasket I.D.

Gasket O.D. 150 LB

Gasket O.D. 300 LB

Gasket O.D. 600 LB

Gasket O.D. 900 LB

1/2

0.84

1.875

2.125

2.125

2.50

3/4

1.06

2.25

2.625

2.625

2.75

1

1.31

2.625

2.875

2.875

3.125

1-1/4

1.66

3

3.25

3.25

3.50

1-1/2

1.91

3.375

3.75

3.75

3.875

2

2.38

4.125

4.375

4.375

5.625

2-1/2

2.88

4.875

5.125

5.125

6.50

3

3.50

5.375

5.875

5.875

6.625

4

4.50

6.875

7.125

7.625

8.125

6

6.62

8.75

9.875

10.50

11.375

8

8.62

11

12.125

12.625

14.125

10

10.75

13.375

14.25

15.75

17.125

12

12.75

16.125

16.625

18.00

19.625

Testing & Quality Control of Inconel 625 Flanges

Every Inconel 625 Flange manufactured and supplied by Kalpataru Piping Solution undergoes a rigorous multi stage quality control process:

Test Type

Method / Standard

Purpose

Chemical Analysis (PMI)

OES / XRF Spectrometry

Verify alloy composition against ASTM B564

Mechanical Testing

Tensile, yield, elongation per ASTM E8

Confirm strength meets spec minimums

Hardness Testing

Brinell / Rockwell per ASTM E10/E18

Check max hardness for NACE compliance

Hydrostatic Test

ASME B16.5 Section 8

Ensure no leakage under pressure

IGC (Intergranular Corrosion)

ASTM A262 Practice E / C

Confirm resistance to sensitization

Ultrasonic Testing (UT)

ASTM E114

Detect subsurface defects in forging

Magnetic Particle / Dye Penetrant

ASTM E709 / ASTM E165

Surface crack detection

Dimensional Inspection

ASME B16.5 tolerance check

Verify OD, bore, thickness, bolt circle

Pitting Resistance Test

ASTM G48 Method A/B

Confirm PREN value and pitting resistance

Corrosion Resistance Properties of Inconel 625 Flanges

Inconel 625 offers one of the broadest corrosion resistance profiles of any commercially available alloy, making it the flange material of choice in industries where failure is not an option:

Corrosion Type

Performance

Key Contributing Element

General Corrosion

Excellent, resists a wide range of organic and inorganic acids

High Ni + Cr content

Pitting Corrosion

Outstanding, PREN greater than 50

Mo + Nb additions

Crevice Corrosion

Excellent in chloride bearing environments

Mo content 8 to 10 percent

Stress Corrosion Cracking (SCC)

Highly resistant in chloride media

High Ni (58% min) base

Intergranular Corrosion

Excellent, Nb stabilizes grain boundaries

Niobium (Nb)

High Temp Oxidation

Resistant to 982 degrees C (1800 degrees F) continuous

Cr protective oxide layer

Seawater Corrosion

Excellent, widely used in offshore / marine applications

Mo + Ni combination

Phosphoric Acid

Good, suitable for wet process phosphoric acid

Mo + Cr synergy

Applications & Industries Using Inconel 625 Flanges

Inconel 625 flanges are specified wherever aggressive media, extreme temperatures, or chloride exposure rules out standard materials. Primary application environments include:

  •       Oil and Gas: Offshore platforms, sour gas lines, subsea manifolds
  •       Chemical Processing: HCl, HF, phosphoric acid service, chlor alkali plants
  •       Marine Systems: Seawater cooling, ballast systems, desalination plants
  •       Power Generation: FGD scrubbers, flue gas desulfurisation plants, nuclear coolant circuits
  •       Aerospace: Fuel and hydraulic systems requiring high temperature and corrosion resistance
  •       Cryogenic Service: LNG systems and applications down to minus 196 degrees Celsius
  •       Pharmaceutical & Food: High purity piping systems requiring corrosion free, hygienic flanged connections

Export Markets

Kalpataru Piping Solution exports Inconel 625 blind flanges, Inconel 625 slip on flanges, and the full flange range to clients across the Middle East, Europe, Southeast Asia, Africa, and the Americas, including key markets such as the United Arab Emirates, Saudi Arabia, the United Kingdom, Germany, Singapore, and the United States. For a shipment quote to your region, contact our export team.

Other Available Stock of ASTM B564 Inconel 625 Flanges

  • Inconel 625 WNRF Flanges Dealer
  • Alloy 625 Spectacle Blind Flanges Stockist
  • Inconel Alloy 625 Long Weld Neck Flanges
  • ASME SB564 Inconel 625 RTJ Flanges Supplier
  • ANSI/ ASME B16.5 Inconel 625 Blind Ring Flanges
  • B564 Inconel 625 BLRF Flanges Distributors
  • Nickel Alloy 625 Lap Joint Flanges Trader
  • SB564 Inconel 625 LJRF Flanges Manufacturer
  • Inconel 625 Slip-on Raised Face Flanges
  • Inconel 625 SORF Flanges Stockholder
  • B564 Inconel Alloy 625 Screwed Flanges
  • ANSI B16.5 Inconel 625 SWRF Flanges
  • Inconel® Alloy 625 Reducing Flanges Stock
  • Inconel 625 Tongue & Groove Flanges
  • Inconel 625 EN 1092-1 Flanges in Mumbai
  • Inconel 625 ASME/ANSI B16.5 Flanges
  • ASTM B564 Inconel 625 Weldoflange
  • Grade 625 Inconel Raised Face Flanges
  • SB564 Inconel 625 Blind Raised Face Flange
  • Inconel® 625 Forged Flanges Wholesaler
  • B16.5 Inconel 625 Expander Flanges
  • Inconel 625 Ring Spacers (Paddle Spacers)
  • Inconel 625 Male & Female Flanges
  • B564 Inconel 625 Flat Face Flanges
  • Inconel 625 Flat Flanges Exporter
  • Alloy UNS N06625 Flanges
  • Inconel DIN 2.4856 Flange
  • Inconel 625 High Hub Blind Flanges
  • Inconel 625 ASME B16.5 Loose Flanges
  • Inconel 625 BS 4504 Flanges
  • Inconel 625 DIN Flanges in India
  • Nickel Alloy 625 Flanges in Supplier

FAQ's About Inconel 625 Flanges

Yes. Inconel 625 can operate over a wide range, from cryogenic temperatures down to minus 196 degrees Celsius all the way up to 982 degrees Celsius (1800 degrees Fahrenheit) in continuous service. It resists oxidation and scaling at high temperature due to its protective chromium oxide film.

The high nickel content (58 percent minimum) protects against chloride induced stress corrosion cracking, and the niobium plus molybdenum additions strengthen the matrix to resist crack propagation. This makes Inconel 625 flanges the preferred choice in sour service, subsea, and acid environments where standard austenitic stainless would fail.

Yes. The alloy has very good weldability and can be joined by standard methods including TIG and MIG. Machining is possible but demands care, as the alloy work hardens; using rigid tooling and appropriate cutting speeds is recommended. Weld filler metal AWS A5.14 ERNiCrMo-3 is recommended for matching welds.

Grade 1 (annealed) is optimised for forming and ductility, typically used in lower temperature service. Grade 2 (solution annealed) provides higher strength and is specified for high temperature and elevated pressure applications above 593 degrees Celsius. Both are covered under ASTM B564, and Kalpataru supplies flanges in both conditions to order.

Standard supply includes EN 10204 3.1 Mill Test Certificates from a NABL approved laboratory, with PMI reports, dimensional inspection records, and heat traceability documentation. EN 10204 3.2 (third party witnessed) is available on request via TUV, Bureau Veritas, Lloyds, SGS, or DNV.

The Pitting Resistance Equivalent Number (PREN) for Inconel 625 is greater than 50, significantly higher than duplex stainless (PREN 30 to 40) and super duplex stainless (PREN 40 to 45). A higher PREN means the material is more resistant to pitting corrosion in chloride environments, which is why Inconel 625 is specified for seawater, FGD, and acid service applications where super duplex flanges would still be at risk.

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