Flange

LAP JOINT FLANGES
Slip on Pipe flanges with a hub have published specifications that range from 1/2" thru 24". Sizes above 24" are produced as lap joints to slip on dimensions. Coastal Flange provides Lap Joint pipe flanges in all material grades, specifications and sizes.
Carbon steel: ASTM A105, A350 LF2
Stainless steel: A182 F304/F304L/F316/F316L/F321
Alloy steel: ASTM A182, GR F1, F11, F22, F5, F9, F91
Outer Diameters: 1/2'' to 24''
Wall Thickness Schedule: SCH 10, SCH 40, SCH 160

THREADED FLANGES
Threaded pipe flanges are typically provided with a raised face, flat face, or RTJ facing. When a raised face is necessary for threaded pipe flanges, the standard height is 1/16" for threaded pipe flanges under 400#. For threaded pipe flanges of 400# and up, the standard threaded pipe flange raised face height is 1/4".
Standard: ASTM A105, ASTM A182
Material: Carbon Steel, Stainless Steel, Alloy Steel
Size Range: 1/2'', 1'', 2'', 3'', 4'' to 24''
Pressure Class: Class 150 to 2500
Face: Raised face (RF), Ring type joint (RTJ)

SOCKET WELD FLANGES
Socket Weld pipe flanges are typically provided with a raised face, flat face, or RTJ facing. When a raised face is necessary for socket weld pipe flanges, the standard height is 1/16" for socket weld pipe flanges under 400#. For socket weld pipe flanges of 400# and up, the standard socket weld pipe flange raised face height is 1/4".
Standard: 
Carbon steel ASTM A105, ASTM A350 LF1/2, ASTM A181
Alloy steel ASTM A182 F5, F9, F11, F22, F91
Stainless steel ASTM A182 F304/L, F316/L
Outer Diameters: 1/2 inch to 24 inch, up to 2500#
Special made: 24'' to 60'', up to 900#
Wall Thickness: Schedule 40 to 160
Pressure Ratings: Class 150 to Class 2500
Face Type: RF, RTJ

Type: welding neck, slip on, blind, socket welding, threaded, lap-joint

Pressure: 150#, 300#, 600#,900#,1500#, 2500#

Material:

 carbon steel A105, C22.8, S235, S235JR, P235GH,SS400,37.2

 Stainless Steel 304/L,316/L,321,310S,347H,1.4301, 1.4404

 ASTM A234 WP1/5/9/11/12/22/91

 Duplex stainless steel: UNS31803, SAF2205, UNS32205, UNS31500

 Coating:

 Rust-proof oil, cold  and hot galvanize

 Packing

 sea worthy plywooden case, wooden pallet

Nominal 

Pipe 

Size 

Outside

Diam. of 

Flange (O) 

Thick. 

of 

Flange (C) 

Diam. 

of

Raised Face (R) 

Diam. 

of Hub 

at Base (X) 

Length 

thru Hub 

(Y) 

Min. 

Thread 

Length 

(T) 

Min. 

Counter 

Bore (Q) 

No. of 

Holes 

Diam. of 

Holes 

Diam. of 

Bolts 

Diam.

of Bolt 

Circle 

Approx. 

Weight

 (in Pounds) 

½ 

3.5

0.44

1.38

1.19

0.62

0.62

— 

4

0.62

0.5

2.38

1

¾ 

3.88

0.5

1.69

1.5

0.62

0.62

— 

4

0.62

0.5

2.75

2

1

4.25

0.56

2

1.94

0.69

0.69

— 

4

0.62

0.5

3.12

2

1 ¼ 

4.62

0.62

2.5

2.31

0.81

0.81

— 

4

0.62

0.5

3.5

3

1 ½ 

5

0.69

2.88

2.56

0.88

0.88

— 

4

0.62

0.5

3.88

3

2

6

0.75

3.62

3.06

1

1

— 

4

0.75

0.62

4.75

5

2 ½ 

7

0.88

4.12

3.56

1.12

1.12

— 

4

0.75

0.62

5.5

7

3

7.5

0.94

5

4.25

1.19

1.19

— 

4

0.75

0.62

6

8

3 ½ 

8.5

0.94

5.5

4.81

1.25

1.25

— 

8

0.75

0.62

7

11

4

9

0.94

6.19

5.31

1.31

1.31

— 

8

0.75

0.62

7.5

13

5

10

0.94

7.31

6.44

1.44

1.44

— 

8

0.88

0.75

8.5

15

6

11

1

8.5

7.56

1.56

1.56

— 

8

0.88

0.75

9.5

19

8

13.5

1.12

10.62

9.69

1.75

1.75

— 

8

0.88

0.75

11.75

30

10

16

1.19

12.75

12

1.94

1.94

— 

12

1

0.88

14.25

43

12

19

1.25

15

14.38

2.19

2.19

— 

12

1

0.88

17

64

14

21

1.38

16.25

15.75

2.25

2.25

— 

12

1.12

1

18.75

90

16

23.5

1.44

18.5

18

2.5

2.5

— 

16

1.12

1

21.25

98

18

25

1.56

21

19.88

2.69

2.69

— 

16

1.25

1.13

22.75

130

20

27.5

1.69

23

22

2.88

2.88

— 

20

1.25

1.12

25

165

24

32

1.88

27.25

26.12

3.25

3.25

— 

20

1.38

1.25

29.5

220

Nominal 

Pipe 

Size  

Outside

Diam. of 

Flange (O)  

Thick. 

of 

Flange (C)  

Diam. 

of

Raised Face 

(R)

Diam. 

of Hub 

at Base 

(X)

Length 

thru Hub 

(Y) 

Min. 

Thread 

Length 

(T) 

Min. 

Counter Bore 

(Q) 

No. of 

Holes 

Diam. of 

Holes 

Diam.

of Bolts 

Diam.

of Bolt 

Circle 

Approx.

Weight 

(in Pounds) 

1/2

3.75

0.56

1.38

1.5

0.88

0.62

0.93

4

0.62

0.5

2.62

2

3/4

4.62

0.62

1.69

1.88

1

0.62

1.14

4

0.75

0.62

3.25

3

1

4.88

0.69

2

2.12

1.06

0.69

1.41

4

0.75

0.62

3.5

3

1 1/4

5.25

0.75

2.5

2.5

1.06

0.81

1.75

4

0.75

0.62

3.88

4

1 1/2

6.12

0.81

2.88

2.75

1.19

0.88

1.99

4

0.88

0.75

4.5

6

2

6.5

0.88

3.62

3.31

1.31

1.12

2.5

8

0.75

0.62

5

7

2 1/2

7.5

1

4.12

3.94

1.5

1.25

3

8

0.88

0.75

5.88

10

3

8.25

1.12

5

4.62

1.69

1.25

3.63

8

0.88

0.75

6.62

13

3 1/2

9

1.19

5.5

5.25

1.75

1.44

4.13

8

0.88

0.75

7.25

17

4

10

1.25

6.19

5.75

1.88

1.44

4.63

8

0.88

0.75

7.88

22

5

11

1.38

7.31

7

2

1.69

5.69

8

0.88

0.75

9.25

28

6

12.5

1.44

8.5

8.12

2.06

1.81

6.75

12

0.88

0.75

10.62

39

8

15

1.62

10.62

10.25

2.44

2

8.75

12

1

0.88

13

58

10

17.5

1.88

12.75

12.62

2.62

2.19

10.88

16

1.12

1

15.25

81

12

20.5

2

15

14.75

2.88

2.38

12.94

16

1.25

1.12

17.75

115

14

23

2.12

16.25

16.75

3

2.5

14.19

20

1.25

1.12

20.25

165

16

25.5

2.25

18.5

19

3.25

2.69

16.19

20

1.38

1.25

22.5

190

18

28

2.38

21

21

3.5

2.75

18.19

24

1.38

1.25

24.75

250

20

30.5

2.5

23

23.12

3.75

2.88

20.19

24

1.38

1.25

27

315

24

36

2.75

27.25

27.62

4.19

3.25

24.19

24

1.62

1.5

32

475

Nominal 

Pipe 

Size  

Outside

Diam. of 

Flange (O)

Thick. 

of 

Flange 

(C)

Diam. 

of

Raised Face 

(R)

Diam. 

of Hub 

at Base (X)

Length 

thru Hub 

(Y) 

Min. 

Thread 

Length 

(T) 

Min. 

Counter 

Bore 

(Q) 

No. of 

Holes 

Diam. of 

Holes 

Diam. of 

Bolts 

Diam. of 

Bolt Circle 

Approx. 

Weight 

(in Pounds) 

1/2

3.75

0.56

1.38

1.5

0.88

0.62

0.93

4

0.62

0.5

2.62

2

3/4

4.62

0.62

1.69

1.88

1

0.62

1.14

4

0.75

0.62

3.25

3

1

4.88

0.69

2

2.12

1.06

0.69

1.41

4

0.75

0.62

3.5

4

1 1/4

5.25

0.81

2.5

2.5

1.12

0.81

1.75

4

0.75

0.62

3.88

5

1 1/2

6.12

0.88

2.88

2.75

1.25

0.88

1.99

4

0.88

0.75

4.5

7

2

6.5

1

3.62

3.31

1.44

1.12

2.5

8

0.75

0.62

5

9

2 1/2

7.5

1.12

4.12

3.94

1.62

1.25

3

8

0.88

0.75

5.88

13

3

8.25

1.25

5

4.62

1.81

1.38

3.63

8

0.88

0.75

6.62

16

3 1/2

9

1.38

5.5

5.25

1.94

1.56

4.13

8

1

0.88

7.25

21

4

10.75

1.5

6.19

6

2.12

1.62

4.63

8

1

0.88

8.5

37

5

13

1.75

7.31

7.44

2.38

1.88

5.69

8

1.12

1

10.5

63

6

14

1.88

8.5

8.75

2.62

2

6.75

12

1.12

1

11.5

80

8

16.5

2.19

10.62

10.75

3

2.25

8.75

12

1.25

1.12

13.75

115

10

20

2.5

12.75

13.5

3.38

2.56

10.88

16

1.38

1.25

17

170

12

22

2.62

15

15.75

3.62

2.75

12.94

20

1.38

1.25

19.25

200

14

23.75

2.75

16.25

17

3.69

2.88

14.19

20

1.5

1.38

20.75

230

16

27

3

18.5

19.5

4.19

3.06

16.19

20

1.62

1.5

23.75

330

18

29.25

3.25

21

21.5

4.62

3.12

18.19

20

1.75

1.63

25.75

400

20

32

3.5

23

24

5

3.25

20.19

24

1.75

1.62

28.5

510

24

37

4

27.25

28.25

5.5

3.62

24.19

24

2

1.88

33

730

Nominal 

Pipe 

Size 

Outside

Diam. of 

Flange (O)

Thick. 

of 

Flange 

(C)

Diam. 

of

Raised Face 

(R)

Diam. 

of Hub 

at Base 

(X)

Length 

thru Hub (Y) 

Min.

Thread 

Length 

(T) 

Min.

Counter 

Bore 

(Q) 

No. of

Holes 

Diam. of

Holes 

Diam. of

Bolts 

Diam. of

Bolt Circle 

Approx.

 Weight 

(in Pounds) 

1/2

4.75

0.88

1.38

1.5

1.25

0.88

0.93

4

0.88

0.75

3.25

4

3/4

5.12

1

1.69

1.75

1.38

1

1.14

4

0.88

0.75

3.5

5

1

5.88

1.12

2

2.06

1.62

1.12

1.41

4

1

0.88

4

8

1 1/4

6.25

1.12

2.5

2.5

1.62

1.19

1.75

4

1

0.88

4.38

9

1 1/2

7

1.25

2.88

2.75

1.75

1.25

1.99

4

1.12

1

4.88

12

2

8.5

1.5

3.62

4.12

2.25

1.5

2.5

8

1

0.88

6.5

25

2 1/2

9.62

1.62

4.12

4.88

2.5

1.88

3

8

1.12

1

7.5

36

3

9.5

1.5

5

5

2.12

1.62

3.63

8

1

0.88

7.5

26

4

11.5

1.75

6.19

6.25

2.75

1.88

4.63

8

1.25

1.12

9.25

53

5

13.75

2

7.31

7.5

3.12

2.12

5.69

8

1.38

1.25

11

83

6

15

2.19

8.5

9.25

3.38

2.25

6.75

12

1.25

1.12

12.5

110

8

18.5

2.5

10.62

11.75

4.00

2.50

8.75

12

1.5

1.38

15.5

170

10

21.5

2.75

12.75

14.5

4.25

2.81

10.88

16

1.5

1.38

18.5

245

12

24

3.12

15

16.5

4.62

3

12.94

20

1.5

1.38

21

325

14

25.25

3.38

16.25

17.75

5.12

3.25

14.19

20

1.62

1.5

22

400

16

27.75

3.5

18.5

20

5.25

3.38

16.19

20

1.75

1.63

24.25

425

18

31

4

21

22.25

6

3.5

18.19

20

2

1.88

27

600

20

33.75

4.25

23

24.5

6.25

3.62

20.19

20

2.12

2

29.5

730

24

41

5.5

27.25

29.5

8

4

24.19

20

2.62

2.5

Nominal 

Pipe 

Size

Outside

Diam. of 

Flange (O)

Thick. 

of 

Flange 

(C) 

Diam. 

of

Raised Face 

(R)

Diam. 

of Hub 

at Base 

(X)

Length 

thru Hub 

(Y) 

Min. 

Thread 

Length 

(T) 

Min. 

Counter 

Bore 

(Q) 

No. of 

Holes 

Diam. of 

Holes 

Diam. of 

Bolts 

Diam. of 

Bolt Circle 

Approx. 

Weight 

(in Pounds) 

1/2

4.75

0.88

1.38

1.5

1.25

0.88

0.93

4

0.88

0.75

3.25

4

3/4

5.12

1

1.69

1.75

1.38

1

1.14

4

0.88

0.75

3.5

5

1

5.88

1.12

2

2.06

1.62

1.12

1.41

4

1

0.88

4

8

1 1/4

6.25

1.12

2.5

2.5

1.62

1.19

1.75

4

1

0.88

4.38

9

1 1/2

7

1.25

2.88

2.75

1.75

1.25

1.99

4

1.12

1

4.88

12

2

8.5

1.5

3.62

4.12

2.25

1.5

2.5

8

1

0.88

6.5

25

2 1/2

9.62

1.62

4.12

4.88

2.5

1.88

3

8

1.12

1

7.5

36