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Fittings

Flanged Fittings

AMERICAN provides a complete line of standard as well as many special flanged fittings for various types of service, including water, sewage and air.

ANSI/AWWA C110/A21.10 Fittings

Most of the flanged fittings furnished by AMERICAN are manufactured in accordance with the requirements of this standard. Such fittings in this section are designated with the heading “ANSI/AWWA C110/A21.10.” The AWWA C110 fitting flanges have facing and drilling that match AWWA C115 threaded-on flanges (see Flanged Joint Pipe) and which also match ANSI B16.1 class 125 flanges.

AMERICAN manufactures some fittings that are not included in AWWA C110, including long-radius 90° bends, reducing bends, wyes and various other fittings commonly used in plant piping. These have AWWA C110 flanges and are denoted by the heading “AMERICAN Standard.” Pressure ratings shown are AMERICAN Standard and are based on AWWA C110 design principles.

AWWA C110 flanges are adequate for a water working pressure of 250 psi with the body of the fitting being suitable for 150 or 250 psi as indicated. In some cases, these fittings have been supplied for greater water working pressure applications, particularly when used with AMERICAN Toruseal gaskets.

ANSI/AWWA C153/A21.53 Fittings

54", 60" and 64" fittings are manufactured in accordance with AWWA C153. Flanges match AWWA C115 and ANSI B16.1 (class 125) flanges and are adequate for a water working pressure of 250 psi. (64" flanges match 66" flanges. See the table in Standard Dimensions). The bodies of these fittings are suitable for 150 psi or 250 psi as indicated. In some cases, these fittings have been supplied for greater water working pressure applications, particularly when used with AMERICAN Toruseal gaskets.

Fittings Class 250 F&D

Except for a transition fabricated pipe from an ANSI B16.1 class 250 flange to a standard AWWA C110 flange, AMERICAN no longer furnishes fittings with flanges faced and drilled per ANSI B16.1 class 250.

Pressure Ratings

As noted in AWWA C111, flange joints in the 24" and smaller sizes may be rated for up to 350 psi with the use of special gaskets such as AMERICAN’s Toruseal gasket.

Furthermore, AMERICAN is able to rate flange pipe and fittings higher than 350 psi on special applications.

Information on fittings class 250 F&D previously furnished by AMERICAN can be found in the Guide to Historical Data.

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Standard Dimensions

Flange Details

ANSI/AWWA C110/A21.10, C111/A21.11 or C153/A21.53

The flanges shown are adequate for water service of 250 psi working pressure and should not be confused with class 250 flanges per ANSI B16.1. The bolt circle and the bolt holes match those of ANSI B16.1 class 125. If flanges are required to be made in accordance with other ratings or other standards, this must be specified on the purchase order. 24" and smaller flanges are rated equal to the fittings to which they are attached and are adequate for water service of greater than 350 psi only with the use of AMERICAN’s Toruseal gaskets.

We recommend that AMERICAN Toruseal gaskets be used for normal water service.

Facing: Flanges are plain faced and are finished smooth or with shallow serrations (AMERICAN’s option).

Back Facing: Flanges may be back faced or spot faced (AMERICAN’s option), for compliance with the flange thickness tolerance.

Drilling: Drilling of flanges can be rotated when required; for those sizes with an even number of bolt holes in each quadrant, the fitting can be rotated 45° with standard drilling.

Size
(in.)

O.D.
(in.)

B.C.
(in.)

T
(in.)

Bolt Hole
Diameter
(in.)

Bolts

No. Per
Joint

Size
(in.)

3

7.50

6.00

0.75

3/4

4

5/8 × 2 1/2

4

9.00

7.50

0.94

3/4

8

5/8 × 3

6

11.00

9.50

1.00

7/8

8

3/4 × 3 1/2

8

13.50

11.75

1.12

7/8

8

3/4 × 3 1/2

10

16.00

14.25

1.19

1

12

7/8 × 4

12

19.00

17.00

1.25

1

12

7/8 × 4

14

21.00

18.75

1.38

1 1/8

12

1 × 4 1/2

16

23.50

21.25

1.44

1 1/8

16

1 × 4 1/2

18

25.00

22.75

1.56

1 1/4

16

1 1/8 × 5

20

27.50

25.00

1.69

1 1/4

20

1 1/8 × 5

24

32.00

29.50

1.88

1 3/8

20

1 1/4 × 5 1/2

30

38.75

36.00

2.12

1 3/8

28

1 1/4 × 6 1/2

36

46.00

42.75

2.38

1 5/8

32

1 1/2 × 7

42

53.00

49.50

2.62

1 5/8

36

1 1/2 × 7 1/2

48

59.50

56.00

2.75

1 5/8

44

1 1/2 × 8

54

66.25

62.75

3.00

2

44

1 3/4 × 8 1/2

60

73.00

69.25

3.12

2

52

1 3/4 × 9

641

80.00

76.00

3.38

2

52

1 3/4 × 9

1.) The dimensions of 64" flange correspond with applicable dimensions of 66" Class E in ANSI/AWWA C207, and 64" ductile iron flanges can be connected to those flanges.

Flanged Fitting Dimensions and Designation of Outlets

ANSI/AWWA C110/A21.10, C153/A21.53, or AMERICAN Standard

See the table below for dimensions for the above fittings. Some of the above fittings are not listed in AWWA C110, but do meet applicable requirements of AWWA C110.

The largest opening establishes the basic size of a reducing fitting. The largest opening is named first, except for bull-head tees and for double-branch bends where both branches are reducing; in these two cases the largest opening is named last.

In the designation of the openings of reducing fittings, they should be read in the order indicated by the sequence of the numbers 1, 2, 3 and 4 as shown.

In describing tees reducing on the branch only, the first size applies to both outlets on the run. Similarly, for crosses with the same size for both run outlets and the same size for both branch outlets, it is necessary to indicate only two sizes. For example: for an 8 × 6 tee or wye – it is not necessary to show 8 × 8 × 6; for an 8 × 6 cross – it is not necessary to show 8 × 8 × 6 x 6.

Size
(in.)

Dimensions2 in Inches

Reducing Tees
and Crosses

Reducing Wyes3

A

B

C

D2

E2

F

R

S
(Dia.)

T

U

Size of Branches and Smaller5

H

J

Size of Branches and Smaller

M

N

P

3

5.5

7.75

3.0

10.0

3.0

6

4.88

5.00

0.56

0.50

-

see6

see6

-

see7

see7

see7

4

6.5

9.00

4.0

12.0

3.0

7

5.50

6.00

0.62

0.50

-

see6

see6

-

see7

see7

see7

6

8.0

11.50

5.0

14.5

3.5

9

7.00

7.00

0.69

0.62

-

see6

see6

-

see7

see7

see7

8

9.0

14.00

5.5

17.5

4.5

11

8.38

9.00

0.94

0.88

-

see6

see6

-

see7

see7

see7

10

11.0

16.50

6.5

20.5

5.0

12

9.75

9.00

0.94

0.88

-

see6

see6

-

see7

see7

see7

12

12.0

19.00

7.5

24.5

5.5

14

11.25

11.00

1.00

1.00

-

see6

see6

-

see7

see7

see7

14

14.0

21.50

7.5

27.0

6.0

16

12.50

11.00

1.00

1.00

-

see6

see6

-

see7

see7

see7

16

15.0

24.00

8.0

30.0

6.5

18

13.75

11.00

1.00

1.00

-

see6

see6

-

see7

see7

see7

18

16.5

26.50

8.5

32.0

7.0

19

15.00

13.50

1.12

1.12

12

13

15.5

8

25.0

1.00

27.5

20

18.0

29.00

9.5

35.0

8.0

20

16.00

13.50

1.12

1.12

14

14

17.0

10

27.0

1.00

29.5

24

22.0

34.00

11.0

40.5

9.0

24

18.50

13.50

1.12

1.12

16

15

19.0

12

40.5

9.0

40.5

30

25.0

41.50

15.0

see4

see4

30

23.00

16.00

1.19

1.15

20

18

23.0

-

see4

see4

see4

36

28.0

49.00

18.0

see4

see4

36

26.00

19.00

1.25

1.15

24

20

26.0

-

see4

see4

see4

42

31.0

56.50

21.0

see4

see4

42

30.00

23.50

1.44

1.28

24

23

30.0

-

see4

see4

see4

48

34.0

64.00

24.0

see4

see4

48

34.00

25.00

1.56

1.42

30

26

34.0

-

see4

see4

see4

54

39.0

-

20.5

-

-

see8

38.00

27.50

1.69

1.55

see9

see9

see9

-

-

-

-

60

43.0

-

23.5

-

-

see8

42.00

32.00

1.88

1.75

see9

see9

see9

-

-

-

-

64

48.0

-

25.0

-

-

see8

44.00

38.75

2.12

1.75

see9

see9

see9

-

-

-

-

2.) See flanged 90° bends for “K” dimensions.

3.) AWWA C110 and C153 do not include data on wyes of any size.

4.) Wyes are special. Substituting a pipe with a lateral welded-on outlet may be more economical and offer quicker shipment. A tee with a 45° bend may also offer quicker shipment.

5.) For larger branches, use “A” dimensions.

6.) For these smaller-diameter reducing tees and crosses, the “A” dimension applies as shown in “cut” of standard tee and cross.

7.) For these smaller-diameter reducing wyes, the “D” and “E” dimensions apply as shown in “cut” of standard wye.

8.) “F” dimensions for 54"-64" reducers vary with diameters of reduction.

9.) “H” and “J” dimensions for 54"-64" tees and crosses vary with diameters of reduction.

Method of Designating Location of Tapped Holes and Sequence of Openings

AMERICAN Standard

Taps are made directly into the wall of the flanged fitting. However, if the wall thickness is insufficient for the required size and angle of tap, a tapping boss is provided on the fitting.

Positions “G” and “M” are approximately in the center of the fitting. All other tap locations vary with size and foundry practice. Exact tap locations cannot usually be provided.

In the designation of the openings of reducing fittings, they should be read in the order indicated by the sequence of the numbers 1, 2, 3 and 4 as shown. Maximum tap diameter depends on the fitting wall thickness.

Product Line Information

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