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Flanged Fittings

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

2 1 4 4 9A Flanged Base Bends Tees Print
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

2 1 4 4 9B Flanged Base Bends Tees Print
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

2 1 4 4 9C Flanged Base Bends Tees Print
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.