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Restrained Joint Pipe

Grooved and Shouldered Joints

The AMERICAN grooved joint, furnished in sizes 4" to 36", and the AMERICAN shouldered joint, furnished in sizes 18" to 64", are fabricated joints most often used in plant piping installations.

These joints are sometimes alternatives to the flanged joint, and they are suitable for all specified applications, such as those found in treatment plants and pump stations.

Both joints meet all applicable requirements of AWWA C606.

Available in both flexible and rigid designs, grooved and shouldered joints offer quick assembly. If a field-grooving machine is available, the field adaptability of grooved pipe may be advantageous.

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Standard Dimensions

Grooved Joint Pipe

Standard fittings are available with grooved joints and are normally available only with rigid grooving. Couplings for grooved joints may be furnished by AMERICAN but are not of our design or manufacture. Check AMERICAN for details and recommendations.

Size
(in.)

Dimensions in Inches

OD

T2
Nominal
Wall
Thickness

A

B

C

D
Groove Depth

Min. Length
Grooved End-
Grooved End
Pipe
(in.)

Flexible Joint

Rigid Joint

Min.

Max.

4

4.80

0.32

0.750

0.840

0.375

4.563

0.096

0.151

3 1/2

6

6.90

0.34

0.750

0.840

0.375

6.656

0.100

0.154

3 1/2

8

9.05

0.36

0.875

0.950

0.500

8.781

0.104

0.177

4

10

11.10

0.38

0.938

1.015

0.500

10.813

0.114

0.186

4

12

13.20

0.40

0.938

1.015

0.500

12.906

0.117

0.192

4

14

15.30

0.42

0.938

1.015

0.625

14.969

0.126

0.206

4 1/4

16

17.40

0.43

1.188

1.340

0.625

17.063

0.128

0.208

5

18

19.50

0.44

1.188

1.340

0.625

19.125

0.148

0.228

5

20

21.60

0.45

1.188

1.340

0.625

21.219

0.150

0.230

5

24

25.80

0.47

1.188

1.340

0.625

25.406

0.157

0.237

5

303

32.00

0.51

1.375

1.625

0.750

31.550

0.195

-

6

363

38.30

0.58

1.375

1.625

0.750

37.850

0.195

-

6

1.) “R” for sizes 4" and 6" is .120"; for 8"-12" is .145"; for 14" and 16" is .165"; for 18"-24" is .185"; and for 30" and 36" is .215".

2.) Minimum nominal wall thickness of centrifugally cast ductile iron pipe furnished with grooved joint. Thicknesses above correspond to special thickness class 53 for 4"-16" diameter, and special thickness classes 54 and 55 for diameters 18" and 20", respectively, and special thickness class 56 for diameters 24"-36".

3.) 30" and 36" sizes are not included in AWWA C606. For tolerances see AWWA C606.

Shouldered Joint Pipe

AMERICAN shouldered joints are furnished on fittings and on statically cast pipe as shown below. On centrifugally cast pipe the shouldered joint is furnished with a welded steel end ring fabricated as shown below right. Consult AMERICAN regarding specific requirements.

Wall thickness will vary according to service requirements and with method of casting – centrifugal or static. Consult AMERICAN for details.

Shouldered Joints with other dimensions can be furnished under certain circumstances. Consult AMERICAN for details.

Couplings for shouldered joints are not designed or manufactured by AMERICAN, but may be furnished on request. Consult with AMERICAN for recommendations.

Welded rings can be furnished on minimum pressure classes of ductile iron pipe. Maximum laying length is 19’6" and minimum laying length is 1’6" for all sizes. Check with AMERICAN if smaller sizes of shouldered end pipes are desired.

Fittings and Spools

Centrifugally Cast Pipe

Size
(in.)

Dimensions in Inches

O.D.

A

B
Min.

C
Max.

S

18

19.50

1.188

0.750

20.469

20.937

20

21.60

1.188

0.750

22.344

22.875

24

25.80

1.188

0.750

26.594

27.125

30

32.00

1.750

1.000

33.000

33.750

36

38.30

1.750

1.000

39.438

40.188

42

44.50

1.750

1.250

45.813

46.625

48

50.80

1.750

1.250

52.188

53.125

54

57.56

1.750

1.500

58.625

59.688

60

61.61

1.750

1.500

63.625

64.688

60

61.61

1.750

1.500

65.063

66.188

644

65.67

1.750

1.500

69.625

70.750

4.) 66" couplings are used with 64" pipe.

Product Line Information

Domestic Certification
Submittals
Pipe Manual
Project Mgt/customer Service
Standards
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