Copper Nickel 70/30 Flanges

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Copper Nickel 70/30 Flanges Manufacturer & Supplier in India

Kalpataru Piping is a reliable stockist and supplier of Copper Nickel 70/30 Flanges (UNS C71500) manufactured in accordance with international piping standards. Copper Nickel 70/30 is a corrosion-resistant alloy containing approximately 70% copper and 30% nickel, with small additions of iron and manganese that enhance strength and resistance to seawater corrosion. Due to these properties, Cu-Ni 70/30 flanges are widely used in marine engineering, offshore oil and gas platforms, desalination plants, shipbuilding, power plants and seawater piping systems.

Cu-Ni 70/30 Slip On Flanges are easy to install and are commonly used in low to moderate pressure piping systems. Weld Neck Flanges are preferred in high-pressure applications because they provide excellent structural strength and reduce stress concentration at the base of the flange. Threaded Flanges are suitable for piping systems where welding is not possible, while Socket Weld Flanges are widely used in small diameter high-pressure piping systems. Blind Flanges are used to close the end of a piping system or pressure vessel, allowing easy inspection and maintenance.

Copper Nickel 70/30 flanges offer excellent resistance to seawater corrosion, biofouling, pitting and stress corrosion cracking. They also provide good mechanical strength, reliable weldability and long service life in aggressive marine environments, making them a preferred choice for critical industrial piping systems.

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Table of Contents

Copper Nickel 70/30 Flanges Specification

Specifications

ASTM / ASME SB 61 / 62 / 151 / 152

Standard

ANSI Flanges, AWWA Flanges, ASME Flanges, BS 10 Table D Flanges, Table E Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flanges.

Dimensions

ANSI/ ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Size

1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000

Pressure Class / Rating

Class 150 LBS, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type

Raised Face (RF), Ring Type Joint (RTJ), Large Male-Female (LMF), Flat Face (FF), Small Male-Female (SMF), Lap-Joint Face (LJF), Small Tongue, Large Tongue & Groove

ASTM B151 Cupro Nickel 70/30 Flanges Equivalent Standard Grade

STANDARD UNS WNR.
Copper Nickel 70/30 C71500 2.0882

Copper Nickel 70/30 Flanges Types

ASTM B152 70/30 Copper Nickel Flanges Chemical Composition
Grade Cu Mn Pb Ni Fe Zn
Cupro Nickel 70/30 65 min 1.0 max 0.05 max 29-33 max 0.4-1.0 max 1 max
ASME SB151 Cu-Ni 70/30 Flanges Mechanical Properties
DensityMelting PointTensile StrengthYield Strength (0.2%Offset)Elongation
0.323 lb/in3 at 68 F2260 F50000 psi20000 psi30 %
Size Chart of Copper Nickel 70/30 Pipe Flanges

Flange Type

Size Range

Copper Nickel 70/30 Pipe Flanges

1/2 NB (15 NB) – 48 NB (1200 NB)

ASTM B151 Cu-Ni 70/30 Slip On Flanges

1/2 NB – 12 NB

Copper Nickel 70/30 Weld Neck Flanges

1/2 NB – 48 NB

Copper Nickel 70/30 Blind Flanges

1/2 NB – 24 NB

Copper Nickel 70/30 Socket Weld Flanges

1/2 NB – 4 NB

Copper Nickel 70/30 Threaded Flanges

1/2 NB – 4 NB

Copper Nickel 70/30 Lap Joint Flanges

1/2 NB – 24 NB

Pressure Rating Chart of Cu-Ni 70/30 Flanges (ASME B16.34)

Temperature (°F)

Class 150

Class 300

Class 400

Class 600

Class 900

Class 1500

Class 2500

-20 to 100

275

720

960

1440

2160

3600

6000

200

230

600

800

1200

1800

3000

5000

300

205

540

720

1080

1620

2700

4500

400

190

495

660

995

1490

2485

4140

500

170

465

620

930

1395

2330

3880

600

140

435

580

875

1310

2185

3640

700

110

425

565

850

1275

2125

3540

800

80

405

540

805

1210

2015

3360

900

50

390

520

780

1165

1945

3240

1000

20

320

430

640

965

1605

2675

1100

20

255

345

515

770

1285

2145

1200

20

155

205

310

465

770

1285

1300

20

85

115

170

255

430

715

1400

20

50

65

95

145

240

400

1500

10

25

35

55

80

135

230

Copper Nickel 70/30 SWRF Flange Thickness Chart

NPS

Outside Diameter (in)

Sch 10

Sch 40

Sch 80

STD

XS

XXS

Sch 160

1/2

0.84

0.083

0.109

0.147

0.109

0.147

0.294

0.188

3/4

1.05

0.083

0.113

0.154

0.113

0.154

0.308

0.219

1

1.315

0.109

0.133

0.179

0.133

0.179

0.358

0.250

1 1/4

1.66

0.109

0.140

0.191

0.140

0.191

0.382

0.250

1 1/2

1.90

0.109

0.145

0.200

0.145

0.200

0.400

0.281

2

2.375

0.109

0.154

0.218

0.154

0.218

0.436

0.344

2 1/2

2.875

0.120

0.203

0.276

0.203

0.276

0.552

0.375

3

3.50

0.120

0.216

0.300

0.216

0.300

0.600

0.438

4

4.50

0.120

0.237

0.337

0.237

0.337

0.674

0.531

6

6.625

0.134

0.280

0.432

0.280

0.432

0.864

0.719

8

8.625

0.148

0.322

0.500

0.322

0.500

0.875

0.906

10

10.75

0.165

0.365

0.594

0.365

0.500

1.000

1.125

12

12.75

0.180

0.406

0.688

0.375

0.500

1.000

1.312

Dimension Table for Copper Nickel 70/30 Flanges

Standard

Class / Rating

Flange Dia (mm)

Bolt Holes

Bolt Circle (mm)

Bolt Size

Hole Dia (mm)

AS 2129

Table C

95

4

67

13

14

AS 2129

Table D

95

4

67

13

14

AS 2129

Table H

114

4

83

16

17

ISO / DIN 7005

PN10

95

4

65

M12

14

ISO / DIN 7005

PN16

95

4

65

M12

14

ANSI B16.5

Class 150

89

4

60

13

16

ANSI B16.5

Class 300

95

4

67

13

16

ANSI B16.5

Class 600

95

4

67

13

16

ANSI B16.5

Class 900

121

4

83

19

22

ANSI B16.5

Class 1500

121

4

83

19

22

 

Copper Nickel 70/30 Slip On Flange Tolerance Chart

Symbol

Dimension

Tolerance

A

Outside Diameter (O.D.)

Up to 24 in: ±1/16 in (1.6 mm)

Over 24 in: ±1/8 in (3.2 mm)

B

Diameter of Contact Face

1/16 in RF: ±1/32 in (0.8 mm)

1/4 in RF / T&G / M-F: ±1/64 in (0.4 mm)

H

Hub Diameter at Welding Point

5 in & smaller: +3/32 in / −1/32 in

6 in & larger: +5/32 in / −1/32 in

C

Flange Thickness

18 in & smaller: ±1/8 in

20 in & larger: ±3/16 in

D

Inside Diameter

10 in & smaller: ±1/32 in

12–18 in: +1/8 in

20 in & larger: −1/16 in

J

Hub Diameter at Base

Up to 24 in: ±1/16 in

Over 24 in: ±1/8 in

K

Hub Length

10 in & smaller: ±1/16 in

12 in & larger: ±1/8 in

P

Bolt Drilling

Bolt Circle: ±1/16 in

Bolt Hole Spacing: ±1/32 in

Other Available Stock of 70/30 Copper Nickel Flanges
  • Copper Nickel 70/30 WNRF Flanges Dealer
  • Cu-Ni Alloy 70/30 Spectacle Blind Flanges
  • 70/30 Cu-Ni Long Weld Neck Flanges Stockist
  • ASME SB151 Cupro Nickel 70/30 RTJ Flanges Supplier
  • ASME B16.5 Copper Nickel C71500 Blind Ring Flanges
  • B152 Copper Nickel 70/30 BLRF Flanges Distributors
  • Copper Nickel Alloy 70/30 Lap Joint Flanges
  • Copper Nickel 70/30 LJRF Flanges Manufacturer
  • 70/30 Copper Nickel Slip-on Raised Face Flanges
  • Copper Nickel 70-30 SORF Flanges Stockholder
  • SB152 Cu-Ni 70/30 Screwed Flanges Trader
  • ANSI B16.5 Copper Nickel 70/30 SWRF Flanges
  • Cupro Nickel 70/30 Reducing Flanges Stock
  • Copper Nickel 70/30 Tongue & Groove Flanges
  • 70/30 Copper Nickel EN 1092-1 Flanges in Mumbai
  • 70/30 Copper Nickel ASME/ANSI B16.5 Flanges
  • ASTM B151 Copper Nickel 70/30 Weldoflange
  • Grade 70/30 Copper Nickel Raised Face Flanges
  • SB151 CuNi 70/30 Blind Raised Face Flange
  • Copper Nickel 70/30 Forged Flanges Wholesaler
  • B16.5 Copper Nickel 70/30 Expander Flanges
  • Cu-Ni 70/30 Ring Spacers (Paddle Spacers)
  • Copper Nickel 70/30 Male & Female Flanges
  • B152 Copper Nickel 70/30 Flat Face Flanges
  • Copper Nickel 70/30 Flat Flanges Exporter
  • Cupro Nickel Alloy UNS C71500 Flanges
  • Copper Nickel DIN 2.0882 Flange
  • Copper Nickel 70/30 High Hub Blind Flanges
  • Copper Nickel 70/30 ASME B16.5 Loose Flanges
  • 70/30 Cu-Ni BS 4504 Flanges in India
  • 70/30 Copper Nickel DIN Flanges
  • Cu-Ni 70/30 Slip On Plate Flanges
ASTM B151 / B152 70-30 Copper Nickel Flanges Pressure Ratings
ASME/ANSI B 16.5Welding Neck Flange, Slip on Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Ring Type Joint Flange
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47Welding Neck Flange, Blind Flange [Series A & B]
PRESSURE CLASS75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36Welding Neck Flange, Slip on Flange, Threaded Flange
PRESSURE CLASS300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange, Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange
PRESSURE CLASSPN 2.5 TO PN 40
BS 4504[PART 1]Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange
PRESSURE CLASSPN 2.5 TO PN 400
BS 1560 BOSSWelding Neck Flange, Socket Welding Flange, Slip-On Flange, Blind Flange, Screwed Boss Flange, Lapped Flange
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
BS10Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLED, E, F, H
DIN FLANGESDIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASSPN 6 TO PN 100
Check out Our related Product
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Applications of Copper Nickel 70/30 Flanges
  • Marine and shipbuilding industries for seawater piping systems, ballast water lines, and cooling water pipelines.
  • Offshore oil and gas platforms for firewater systems, seawater intake lines, and process piping.
  • Desalination plants for saltwater transfer pipelines and brine handling systems.
  • Power generation plants for condenser systems and cooling water circulation lines.
  • Chemical processing industries for corrosion-resistant piping and equipment connections.
  • Heat exchangers and condensers for tube connections and fluid transfer pipelines.
  • Petrochemical plants for process piping systems operating in corrosive environments.
  • Water treatment facilities for pump lines, filtration systems, and seawater handling pipelines.
  • Coastal infrastructure projects for marine piping and offshore structural systems.
  • Industrial cooling systems where continuous seawater circulation is required. 
Suppliers and Exporters of Copper Nickel 70/30 ASME, ASTM, DIN, BS, EN Flanges in Countries Like

Slovakia, Brazil, Turkey, Argentina, Poland, Australia, Libya, Sri Lanka, Trinidad & Tobago, Tibet, Kazakhstan, Chile, Belgium, Venezuela, Morocco, Jordan, Canada, Indonesia, Gabon, Israel, Romania, Saudi Arabia, Mexico, Bulgaria, Poland, Azerbaijan, mexico, India, brazil, cyprus, United States, Oman, Nepal, Croatia, Afghanistan, Germany, srilanka, Portugal, malaysia, Ghana, Switzerland, Greece, Spain, Estonia, Japan, thailand, Algeria, Bhutan, Hong Kong, Mongolia, Norway, Ecuador, Lebanon, Ukraine, Lithuania, Namibia, Serbia, South Africa, Ireland, United Arab Emirates, Taiwan, Denmark, Austria, Nigeria, China, Qatar, Egypt, Yemen, Gambia, Czech Republic, Hungary, Sweden, Iran, France, Macau, Thailand, Bangladesh, Russia, Bahrain, Vietnam, Nigeria, Kenya, Chile, Colombia, South Korea, United Kingdom, Kuwait, Peru, Belarus, Tunisia, Iran, Bolivia, Mexico, Zimbabwe, Puerto Rico, Finland, Netherlands, Italy, Philippines, Malaysia, Costa Rica, Singapore, New Zealand.

FAQ’s About Copper Nickel 70/30 flanges

Copper Nickel 70/30 flanges are pipe flanges manufactured from an alloy containing approximately 70% copper and 30% nickel (UNS C71500). These flanges are widely used in marine, offshore, and seawater piping systems due to their excellent corrosion resistance and durability.

The most common types include Slip On Flanges, Weld Neck Flanges, Blind Flanges, Socket Weld Flanges, Threaded Flanges, and Lap Joint Flanges. Each type is designed for specific pressure, temperature, and piping requirements.

Copper Nickel 70/30 pipe flanges are typically available in sizes ranging from 1/2 NB (15 mm) to 48 NB (1200 mm) depending on the flange type and manufacturing standard.

Copper Nickel 70/30 flanges are commonly manufactured according to international standards such as ASTM B151, ASME B16.5, ASME B16.47, and ANSI B16.34.

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