+86 18969027607

Reliable Stainless Steel Long Weld Neck Flange Piping System

Reliable Stainless Steel Long Weld Neck Flange Piping System Reliable Stainless Steel Long Weld Neck Flange Piping System Reliable Stainless Steel Long Weld Neck Flange Piping System Reliable Stainless Steel Long Weld Neck Flange Piping System Reliable Stainless Steel Long Weld Neck Flange Piping System Reliable Stainless Steel Long Weld Neck Flange Piping System
  • Reliable Stainless Steel Long Weld Neck Flange Piping System
  • Reliable Stainless Steel Long Weld Neck Flange Piping System
  • Reliable Stainless Steel Long Weld Neck Flange Piping System
  • Reliable Stainless Steel Long Weld Neck Flange Piping System
  • Reliable Stainless Steel Long Weld Neck Flange Piping System
  • Reliable Stainless Steel Long Weld Neck Flange Piping System

Reliable Stainless Steel Long Weld Neck Flange Piping System

Long weld neck flange is a specialized component in piping systems, distinguished by its extended neck or hub. Welded neck flanges have a long tapered hub that reduces its size from the pipe to the fitting. This design minimizes stress concentration, making it ideal for high-pressure and high-temperature applications. The extended neck reinforces the flange, promoting even stress distribution and reducing fatigue risk. Additionally, piping systems are safer when reinforced with long weld neck flanges. This kind of flange helps to balance pressure and temperature changes in the liquid that is flowing in the pipeline.

 

Long weld neck flanges are favored in critical industrial settings due to their enhanced structural integrity. Notably, the extended neck facilitates easy welding and inspection processes. Ample space for welding ensures a secure connection, while the extended length simplifies inspections by providing better visibility and access.

 

Long weld neck flanges are prevalent in petrochemical, oil and gas, and power generation industries, contributing to robust and reliable piping systems. Their design ensures durability and safety, making them a preferred choice for applications where performance is paramount.

Introduction

Standard

ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820, etc.

Material

Stainless steel: A182 F304, A182F304L, A182 F316, A182 F316L, A182F321, A182 317H, A182316Ti, F53,F51 etc

Carbon steel: A105, A350LF2

Alloy steel: A182 F11, A182F22, A182F12, A182 F5, A182F91, A182 F9 etc

Surface

Treatment  Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized

Type

Forging, CNC Machining

size

1/2"-24"

Delivery time

Within 5-30 days after receiving the prepaid

Packing

Treatment  Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized

Application

Chemical, oil mills, petrochemical, mining, refineries, construction, fertilizers, shipbuilding, power plants, steel plants, nuclear power, offshore, oil & gas, defense, paper, breweries, railway, cement, and engineering, etc.

Class 150

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

3.50

0.44

1.25

4

0.62

2.38

1.38

9.00

1.36

¾

0.75

3.88

0.50

1.62

4

0.62

2.75

1.69

9.00

2.27

1

1.00

4.25

0.56

2.00

4

0.62

3.12

2.00

9.00

3.17

1 ¼

1.25

4.26

0.62

2.38

4

0.62

3.50

2.50

9.00

4.54

1 ½

1.50

5.00

0.69

2.62

4

0.62

3.88

2.88

9.00

5.44

2

2.00

6.00

0.75

3.25

4

0.75

4.75

3.63

9.00

6.81

2 ½

2.50

7.00

0.88

3.75

4

0.75

5.50

4.13

9.00

9.98

3

3.00

7.50

0.94

4.25

4

0.75

6.00

5.00

9.00

11.35

3 ½

3.50

8.50

0.94

4.88

8

0.75

7.00

5.50

9.00

14.52

4

4.00

9.00

0.94

5.50

8

0.75

7.50

6.19

12.00

21.33

5

5.00

10.00

0.94

6.50

8

0.88

8.50

7.31

12.00

25.87

6

6.00

11.00

1.00

7.75

8

0.88

9.50

8.50

12.00

34.05

8

8.00

13.50

1.12

9.75

8

0.88

11.75

1063

12.00

46.30

10

10.00

16.00

1.19

12.00

12

1.00

14.25

12.75

12.00

64.92

12

12.00

19.00

1.25

14.38

12

1.00

17.00

15.00

12.00

93.07

14

14.00

31.00

1.38

16.00

12

1.12

18.75

16.25

12.00

95.79

16

16.00

23.50

1.44

18.00

16

1.12

21.25

18.50

12.00

111.68

18

18.00

25.00

1.56

20.00

16

1.25

22.75

21.00

12.00

122.58

20

20.00

25.50

1.69

22.00

20

1.25

25.00

23.00

12.00

141.19

24

24.00

32.00

1.88

26.25

20

1.38

29.50

27.25

112.00

192.04

 

 

Class 300

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

3.75

0.56

1.50

4

0.62

26.2

1.38

9.00

2.27

¾

0.75

4.62

0.62

1.88

4

0.75

3.25

1.69

9.00

4.08

1

1.00

4.88

0.69

2.12

4

0.75

3.50

2.00

9.00

4.08

1 ¼

1.25

5.25

0.75

2.50

4

0.75

3.88

2.50

9.00

5.90

1 ½

1.50

6.12

0.81

2.75

4

0.88

4.50

2.88

9.00

6.81

2

2.00

6.50

0.88

3.31

8

0.75

5.00

3.63

9.00

9.08

2 ½

2.50

7.50

1.00

3.94

8

0.88

5.88

4.13

9.00

11.35

3

3.00

8.25

1.12

4.62

8

0.88

6.62

5.00

9.00

15.89

3 ½

3.50

9.00

1.19

5.25

8

0.88

7.25

5.50

9.00

19.06

4

4.00

10.00

1.25

5.75

8

0.88

7.88

6.19

12.00

28.14

5

5.00

11.00

1.38

7.00

8

0.88

9.25

7.31

12.00

38.14

6

6.00

12.50

1.44

8.12

12

0.88

10.62

8.50

12.00

47367

8

8.00

15.00

1.62

10.25

12

1.00

13.00

10.63

12.00

67.19

10

10.00

17.50

1.88

12.62

16

1.12

15.25

12.57

12.00

95.34

12

12.00

20.50

2.00

14.75

16

1.25

17.75

15.00

12.00

124.85

14

14.00

23.00

2.12

16.75

20

1.25

20.25

16.25

12.00

147.09

16

16.00

25.50

2.25

19.00

20

1.38

22.50

18.50

12.00

173.41

18

18.00

28.00

2.38

21.00

24

1.38

24.75

21.00

12.00

211.11

20

20.00

30.50

2.50

23.12

24

1.38

27.00

23.00

12.00

249.16

24

24.00

36.00

2.75

27.62

24

1.62

32.00

27.25

12.00

353.21

 

 

 

Class 400

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

3.75

0.56

1.50

4

0.62

26.20

1.38

9.00

2.27

¾

0.75

4.62

0.62

1.88

4

0.75

3.25

1.69

9.00

3.63

1

1.00

4.88

0.69

2.12

4

0.75

3.50

2.00

9.00

4.08

1 ¼

1.25

5.25

0.81

2.50

4

0.75

3.88

2.50

9.00

5.09

1 ½

1.50

6.12

0.88

2.75

4

0.88

4.50

2.88

9.00

7.266.50

2

2.00

6.50

1.00

3.31

8

0.75

5.00

3.63

9.00

9.08

2 ½

2.50

7.50

1.12

3.94

8

0.88

5.88

4.13

9.00

12.25

3

3.00

8.25

1.25

4.62

8

0.88

6.62

5.00

9.00

16.34

3 ½

3.50

9.00

1.38

5.25

8

1.00

7.25

5.50

9.00

20.04

4

4.00

10.00

1.38

5.75

8

1.00

7.88

6.19

12.00

29.51

5

5.00

11.00

1.50

7.00

8

1.00

9.25

7.31

12.00

39.95

6

6.00

12.50

1.62

8.12

12

1.00

10.62

8.50

12.00

49.94

8

8.00

15.00

1.88

10.25

12

1.12

13.00

10.63

12.00

69.91

10

10.00

17.50

2.12

12.62

16

1.25

15.25

12.75

12.00

98.97

12

12.00

20.50

2.25

14.75

16

1.38

17.75

15.00

12.00

129.39

14

14.00

23.00

2.38

16.75

20

1.38

20.25

16.25

12.00

152.54

16

16.00

25.50

2.50

19.00

20

1.50

22.50

18.50

12.00

189.77

18

18.00

28.00

2.62

21.00

24

1.50

24.75

21.00

12.00

218.82

20

20.00

30.50

2.75

23.12

24

1.62

27.00

23.00

12.00

257.87

24

24.00

36.00

3.0

27.62

24

1.88

32.00

27.25

12.00

365.01

 

 

Class 600

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

3.75

0.56

1.50

4

0.62

2.62

1.38

9.00

2.27

¾

0.75

4.62

0.62

1.88

4

0.75

3.25

1.69

9.00

3.63

1

1.00

4.88

0.69

2.12

4

0.75

3.50

2.00

9.00

4.08

1 ¼

1.25

5.25

0.81

2.50

4

0.75

3.88

2.50

9.00

5.09

1 ½

1.50

6.12

0.88

2.75

4

0.88

4.50

2.88

9.00

7.26

2

2.00

6.50

1.00

3.31

8

0.75

5.00

3.63

9.00

9.08

2 ½

2.50

7.50

1.12

3.94

8

0.88

5.88

4.13

9.00

12.25

3

3.00

8.25

1.25

4.62

8

0.88

6.62

5.00

9.00

16.34

4

4.00

10.75

1.50

6.00

8

1.00

8.50

6.19

12.00

34.95

5

5.00

13.00

1.75

7.50

8

1.12

10.50

7.31

12.00

55.84

6

6.00

14.00

1.88

8.75

12

0.88

11.50

9.50

12.00

69.08

8

8.00

16.50

2.19

10.75

12

1.25

13.75

10.63

12.00

93.97

10

10.00

20.00

2.50

13.50

16

1.38

17.00

12.75

12.00

147.09

12

12.00

22.00

2.62

15.75

20

1.38

19.25

15.00

12.00

178.42

14

14.00

23.75

2.75

17.00

20

1.50

20.75

16.25

16.00

213.83

16

16.00

27.00

3.00

19.50

20

1.62

23.75

18.50

16.00

289.65

18

18.00

29.25

3.25

21.50

20

1.75

25.75

21.00

16.00

331.42

20

20.00

32.00

3.50

24.00

24

1.75

28.50

23.00

16.00

415.86

24

24.00

37.00

4.00

28.25

24

2.00

33.00

27.25

16.00

549.34

 

 

 

Class 900

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

4.75

0.88

1.56

4

0.88

3.25

1.38

9.00

3.63

¾

0.75

5.12

1.00

1.81

4

0.88

3.50

1.69

9.00

4.54

1

1.00

5.88

1.12

2.12

4

1.00

4.00

2.00

9.00

5.09

1 ¼

1.25

6.25

1.112

2.50

4

1.00

4.38

2.50

9.00

7.71

1 ½

1.50

7.00

1.25

2.75

4

1.12

4.88

2.88

9.00

9.53

2

2.00

8.50

1.50

4.12

8

1.00

6.50

3.63

9.00

19.06

2 ½

2.50

9.62

1.62

4.88

8

1.12

7.50

4.13

9.00

23.15

3

3.00

9.50

1.50

5.00

8

1.00

7.50

5.00

9.00

25.42

4

4.00

11.50

1.75

6.25

8

1.25

9.25

6.19

12.00

42.22

5

5.00

13.75

2.00

7.50

8

1.38

11.00

7.31

12.00

61.29

6

6.00

15.00

2.19

9.25

12

1.25

12.50

8.50

12.00

86.71

8

8.00

18.50

2.50

11.75

12

1.50

15.50

10.63

12.00

134.83

10

10.00

21.50

2.75

14.50

16

1.50

18.50

12.75

12.00

191.58

12

12.00

24.00

3.12

16.50

20

1.50

21.00

15.00

12.00

235.17

14

14.00

25.25

3.38

17.75

20

1.62

22.00

16.25

16.00

283.29

16

16.00

27.75

3.50

20.00

20

1.75

24.25

18.50

16.00

340.50

18

18.00

31.00

4.00

22.25

20

2.00

27.00

21.00

16.00

413.30

20

20.00

33.75

4.25

24.50

20

2.12

29.50

23.00

16.00

508.93

24

24.00

41.00

5.50

29.50

20

2.621

35.50

27.25

16.00

846.71

 

 

Class 1500

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

4.75

0.88

1.56

4

0.88

3.25

1.38

9.00

3.63

¾

0.75

5.12

1.00

1.81

4

0.88

3.50

1.69

9.00

4.54

1

1.00

5.88

1.12

2.12

4

1.00

4.00

2.00

9.00

5.09

1 ¼

1.25

6.25

1.12

2.50

4

1.00

4.38

2.50

9.00

7.71

1 ½

1.50

7.00

1.25

2.75

4

1.12

4.88

2.88

9.00

9.53

2

2.00

9.50

1.50

4.12

8

1.00

6.50

3.63

9.00

19.06

2 ½

2.50

9.62

1.62

4.88

8

1.12

7.50

4.13

9.00

25.42

3

3.00

10.50

1.88

5.25

8

1.25

8.00

5.00

9.00

30.41

4

4.00

12.25

2.12

6.38

8

1.38

9.50

6.19

12.00

49.94

5

5.00

14.75

2.88

7.75

8

1.62

11.50

7.31

12.00

82.17

6

6.00

15.50

3.25

9.00

12

1.50

12.50

8.50

12.00

97.61

8

8.00

19.00

3.62

11.50

12

1.75

15.50

10.63

12.00

152.99

10

10.00

23.00

4.25

14.50

12

2.00

19.00

12.75

12.00

247.88

12

12.00

26.50

4.88

17.75

16

2.12

22.50

15.00

12.00

429.48

14

14.00

29.50

5.25

19.50

16

2.38

25.00

16.25

16.00

506.66

16

16.00

32.50

5.75

21.75

16

2.62

27.75

18.50

16.00

622.43

18

18.00

36.00

6.38

23.50

16

2.88

30.50

21.00

16.00

759.99

20

20.00

38.75

7.00

25.25

16

3.12

32.75

23.00

16.00

882.12

24

24.00

46.00

8.00

30.00

16

3.62

39.00

27.25

16.00

1332.94

 

 

Class 2500

NPS

Bore

OD

Thk

OD

No.

OF Holes

Hole Size

Bolt Circle

Raised Face Dia.

LENGTH

WEIGHT

(in)

B(in)

O(in)

T(in)

D(in)

(Holes)

d(in)

C(in)

R(in)

L(in)

(KILO)-

½

0.50

5.25

1.19

1.81

4

0.88

3.50

1.38

9.00

4.99

¾

0.75

5.50

1.25

2.06

4

0.88

3.75

1.69

9.00

5.90

1

1.00

6.25

1.38

2.25

4

1.00

4.25

2.00

9.00

8.17

1 ¼

1.25

7.25

1.50

2.88

4

1.12

5.12

2.50

9.00

12.25

1 ½

1.50

8.00

1.75

3.12

4

1.25

5.75

2.88

9.00

14.98

2

2.00

9.25

2.00

3.75

8

1.12

6.75

3.63

9.00

21.72

2 ½

2.50

10.50

2.25

4.50

8

1.25

7.75

4.13

9.00

29.96

3

3.00

12.00

2.62

5.25

8

1.38

9.00

5.00

9.00

44.03

4

4.00

14.00

3.00

6.50

8

1.62

10.75

6.19

12.00

72.18

5

5.00

16.50

3.62

8.00

8

1.88

12.75

7.31

12.00

112.59

6

6.00

19.00

4.25

9.25

8

2.12

14.50

8.50

12.00

162.53

8

8.00

21.75

5.00

12.00

12

2.12

17.25

10.63

16.00

267.40

10

10.00

26.50

6.50

14.75

12

2.62

21.25

12.75

16.00

452.63

12

12.00

30.00

7.25

17.38

12

2.88

24.38

15.00

16.00

618.80

Applications

Leave A Message

Xinhang Special Material Co., Ltd. Hangzhou Branch

16+ Years Stainless Steel Pipe Manufacturer

Xinhang Special Material Co., Ltd. Hangzhou Branch
Xinhang Special Material Co., Ltd. Hangzhou Branch

Xinhang Special Material Co., Ltd. Hangzhou Branch is famous China Reliable Stainless Steel Long Weld Neck Flange Piping System suppliers and OEM/ODM Reliable Stainless Steel Long Weld Neck Flange Piping System manufacturers, founded in 2007 and moved to Longyou Economic Development Zone, Zhejiang Province, in 2022. It covers an area of 130,000 square meters, more than 30 production lines, 300 workers, 20 R&D people, 30 inspection people and an annual output of 50,000 tons.

It has passed ISO9001:2008 quality management system, PED 97/23/EC EU Pressure Equipment Directive certification, China Special Equipment Manufacturing License (Pressure Tube) TS certification, ASME certification, provincial enterprise standardization management system, ISO14000:2004 environment management system, cleaner production (green enterprise), and a series of certifications, as well as China Classification Society (CCS), American Bureau of Shipping (ABS), British Register of Shipping (LR), Deutsche Veritas (GL), Bureau Veritas Society (BV), Det Norske Veritas (DNV), and Korean Register of Shipping (KR) factory certification.

The main products include stainless steel pipes, pipe fittings, flanges, valves, etc., which are widely used in petroleum, chemical industry, nuclear industry, smelting, shipbuilding, pharmaceuticals, food, water conservancy, electric power, new energy, mechanical equipment, and other fields. The company adheres to the corporate tenet of "quality for survival, reputation for development" and wholeheartedly serves every customer to create a win-win situation.

Honor

  • Steel Pipe And Tubes
  • Approval Of Manufacturing Process
  • Approval Certificate For Materials
  • Approval Certificate for Manufacturing Process
  • ABS

News

Get Fresh Updates Via Email

We'll never share your email address and you
can opt out at any time, we promise.