Ductile Iron Pipe Icon
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.

Read More
contact sales

Flanged Base Bends and Tees

Bases are faced and drilled only when specified on the purchase order. When a base fitting is ordered with base faced and drilled, the base will be plain faced and drilled as shown in the table below.

Dimension “R” is the finished dimension; unfinished bases will be slightly longer. For supporting pipe sizes and base drilling, see below.

Base dimensions and weights are the same for full opening bends and tees, as well as for reducing bends and tees – see Bends and Tees. The proper base is determined by the largest opening. To compute the total weight of a reducing base bend or tee, add the weight of the base only (shown below) to the weight of a reducing bend or tee of the size and class as selected from the preceding tables.

When ordering reducing base bends always specify which flange is opposite the base. To order base tees reducing on the branch, specify sizes in proper order and give the figure number shown below.

Bases other than shown here – such as on the side of a fitting – are special and may be available on 14" and larger bends. See Standard Dimensions for some available base locations. Consult AMERICAN for special base locations.

To avoid an error, it is recommended that AMERICAN be consulted prior to ordering any base fittings.

Bases of these fittings are intended for support in compression and are not to be used for thrust anchors or supports in tension, bending or shear.

Flanged Base Bends

Size
(in.)

Pressure
Rating
(psi)

Dimensions in Inches

Weight in Pounds

R

S
Dia.

T

U

Short Radius

Long Radius

Base
Bend

Base
Only

Base
Bend

Base
Only

4

250

5.5

6

0.62

0.5

55

10

65

15

6

250

7

7

0.69

0.62

85

20

110

30

8

250

8.38

9

0.94

0.88

145

40

195

55

10

250

9.75

9

0.94

0.88

210

45

280

65

12

250

11.25

11

1

1

300

65

420

95

14

250

12.5

11

1

1

360

70

490

105

16

250

13.75

11

1

1

445

75

615

110

18

250

15

13.5

1.12

1.12

565

115

800

170

20

250

16

13.5

1.12

1.12

700

120

985

175

24

250

18.5

13.5

1.12

1.12

1030

130

1430

190

30

150

23

16

1.19

1.15

1625

190

2400

295

30

250

23

16

1.19

1.15

1625

190

2400

295

36

250

26

19

1.25

1.15

2385

250

3680

395

42

250

30

23.5

1.44

1.28

3465

410

5515

650

48

250

34

25

1.56

1.42

4610

515

7635

845

541

250

38

27.5

1.69

1.55

4790

1050

-

-

601

250

42

32

1.88

1.75

6465

1500

-

-

641

250

44

38.75

2.12

1.75

8995

2250

-

-

Flanged Base Tees

Size
(in.)

Pressure
Rating
(psi)

Dimensions in Inches

Weight in Pounds

R

S
Dia.

T

U

Base
Fitting

Base
Only

4

250

5.5

6

0.62

0.5

75

10

6

250

7

7

0.69

0.62

110

15

8

250

8.38

9

0.94

0.88

185

30

10

250

9.75

9

0.94

0.88

300

30

12

250

11.25

11

1

1

430

45

14

250

12.5

11

1

1

485

50

16

250

13.75

11

1

1

600

50

18

250

15

13.5

1.12

1.12

740

75

20

250

16

13.5

1.12

1.12

930

75

24

250

18.5

13.5

1.12

1.12

1410

80

30

250

23

16

1.19

1.15

2270

120

36

250

26

19

1.25

1.15

3320

160

42

150

30

23.5

1.44

1.28

4740

270

42

250

30

23.5

1.44

1.28

5850

270

48

150

34

25

1.56

1.42

6235

335

48

250

34

25

1.56

1.42

7720

335

541

250

38

27.5

1.69

1.55

6590

565

601

250

42

32

1.88

1.75

8905

855

641

250

44

38.75

2.12

1.75

12275

1275

Base Flange Details

Fitting Size
(in.)

Dimensions in Inches

No.
of
Bolts

B.C.
Bolt Circle

Bolt Hole
Diameter

4

4.75

3/4

4

6

5.5

3/4

4

8

7.5

3/4

4

10

7.5

3/4

4

12

9.5

7/8

4

14

9.5

7/8

4

16

9.5

7/8

4

18

11.75

7/8

4

20

11.75

7/8

4

24

11.75

7/8

4

30

14.25

1

4

36

17

1

4

42

21.25

1 1/8

4

48

22.75

1 1/4

4

541

25

1 1/4

4

601

29.5

1 3/8

4

641

36

1 3/8

4

Size of Supporting Flanged Pipe for Base Fittings

Fitting
Size
(in.)

4

5

6

8

10

12

14

16

18

20

24

30

36

42

48

54

60

64

Supporting
Pipe Size
(in.)

2

2 1/2

2 1/2

4

4

6

6

6

8

8

8

10

12

16

18

20

24

30

1.) These sizes are not included in AWWA C110 or C153.

Product Line Information

Domestic Certification
Submittals
Pipe Manual
Project Mgt/customer Service
Standards
Aerial view of iron pipes

Contact Sales

Reach out to our sales team for more product information.
contact sales

Today's Infrastructure Solutions in the U.S. and Around the Globe.

About Us
American Mark