Standard pipe bend radius chart shows the bending radiuses available in pipes bending products. Piping bends are pipe fittings whose bending radius can range from 1D to 10D generally. There are different dimensions and categories in the standard bend radius for pipe fittings. The bending radius is expressed in relation to the pipe’s outer diameter. If the radius is equal to the pipes diameter then the radius is 1D. The radius is 2 times greater than the outer diameter then the pipes bends is 2D. There are also different standard pipe bend angles ranging from 15% degrees to 180 degrees.
Carbon Steel Pipe Bend
Long Radius Bend
The angle defines how quickly or slowly the direction of flow is changed and what kind of pressure is excerpted onto the piping bend wall as a result of the change in direction. To know that different bending radiuses and sizes of the piping bends, please contact us to receive a pipe bending radius chart. This chart provides the available piping bend radiuses with wall thickness and the size of the bending. There are different specifications to cover different application requirements and the piping bending can be made from any different material grade.
The most used materials are austenitic stainless steels and carbon steels. You can contact us to know more about the standard pipe bend size, pricing, dimensions and material grades. The application of the piping bends can be seen in many piping applications such as general corrosive services, water lines, oil and gas, petroleum and other industrial piping applications.
NPS | Outside Diameter | Back to Face | Center to Center | ||
---|---|---|---|---|---|
Inch. | OD | A | B | C | D |
1/2 | 21.3 | 48 | – | 76 | – |
3/4 | 26.7 | 43 | – | 57 | – |
1 | 33.4 | 56 | 41 | 76 | 51 |
1 1/4 | 42.2 | 70 | 52 | 95 | 64 |
1 1/2 | 48.3 | 83 | 62 | 114 | 76 |
2 | 60.3 | 106 | 81 | 152 | 102 |
2 1/2 | 73 | 132 | 100 | 191 | 127 |
3 | 88.9 | 159 | 121 | 229 | 152 |
3 1/2 | 101.6 | 184 | 140 | 267 | 178 |
4 | 114.3 | 210 | 159 | 305 | 203 |
5 | 141.3 | 262 | 197 | 381 | 254 |
6 | 168.3 | 313 | 237 | 457 | 305 |
8 | 219.1 | 414 | 313 | 610 | 406 |
10 | 273.1 | 518 | 391 | 762 | 508 |
12 | 323.9 | 619 | 467 | 914 | 610 |
14 | 355.6 | 711 | 533 | 1067 | 711 |
16 | 406.4 | 813 | 610 | 1219 | 813 |
18 | 457.2 | 914 | 686 | 1372 | 914 |
20 | 508 | 1016 | 762 | 1524 | 1016 |
22 | 559 | 1118 | 838 | 1676 | 1118 |
24 | 610 | 1219 | 914 | 1829 | 1219 |
All dimensions are in mm |
Standard pipes | Spec | . Bauart 5 | 2,5D | |
---|---|---|---|---|
DN | Diameter [ØD] | CLR | CLR | CLR |
20 | 26,9 | 110 | 67 | |
25 | 33,7 | 110 | 84 | |
32 | 42,4 | 110 | 106 | |
40 | 48,3 | 110 | 212 | |
50 | 60,3 | 125 | 151 | |
65 | 76,1 | 175 | 190 | |
80 | 88,9 | 205 | 222 | |
100 | 114,3 | 270 | 286 | |
125 | 139,7 | 330 | 350 | |
150 | 168,3 | 390 | 421 | |
200 | 219,1 | 510 | ||
250 | 273 | 650 | ||
300 | 323,9 | 775 | ||
350 | 355,6 | 850 | ||
400 | 406,4 | 970 | ||
500 | 508 | 1245 |
NPS | ALL FITTINGS | ALL FITTINGS | ALL FITTINGS | 180 DEG RETURN BENDS | CAPS | ELBOWS AND TEES | REDUCERS | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS |
---|---|---|---|---|---|---|---|---|---|
NPS | I.D. at End (1), (3), (4) |
O.D. at Bevel (1), (2) | Wall Thickness (3) | Centre-to-Centre O | Overall Length E | Centre-to-End Dimension A,B,C,M | Overall Length H | Alignment of Ends U | Back-to-Face K |
½ to 2½ | 0.03 | 0.06 -0.03 | Not less than 87.5% of nominal thickness | 0.25 | 0.12 | 0.06 | 0.06 | 0.03 | 0.25 |
3 to 3 ½ | 0.06 | 0.06 | 0.25 | 0.12 | 0.06 | 0.06 | 0.03 | 0.25 | |
4 | 0.06 | 0.06 | 0.25 | 0.12 | 0.06 | 0.06 | 0.03 | 0.25 | |
5 to 8 | 0.06 | 0.09 -0.06 |
0.25 | 0.25 | 0.06 | 0.06 | 0.03 | 0.25 | |
10 to 18 | 0.12 | 0.16 -0.12 |
0.38 | 0.25 | 0.09 | 0.09 | 0.06 | 0.25 | |
20 to 24 | 0.19 | 0.25 -0.19 |
0.38 | 0.25 | 0.09 | 0.09 | 0.06 | 0.25 | |
26 to 30 | 0.19 | 0.25 -0.19 |
… | 0.38 | 0.12 | 0.19 | … | … | |
32 to 48 | 0.19 | 0.25 -0.19 |
… | 0.38 | 0.19 | 0.19 | … | … |
Nominal Piping Size (NPS) | Outside Diameter at Bevel D | Center-to-End 90 Deg Elbows A |
1 | 33.4 | 25.4 |
1-1/4 | 42.2 | 31.8 |
1-1/2 | 48.3 | 38.1 |
2 | 60.3 | 50.8 |
2-1/2 | 73.0 | 63.5 |
3 | 88.9 | 76.2 |
3-1/2 | 101.6 | 88.9 |
4 | 114.3 | 101.6 |
5 | 141.3 | 127.0 |
6 | 168.3 | 152.4 |
8 | 219.1 | 203.2 |
10 | 273.0 | 254.0 |
12 | 323.8 | 304.8 |
14 | 355.6 | 355.6 |
16 | 406.4 | 406.4 |
18 | 457 | 457.2 |
20 | 508 | 508.0 |
22 | 558 | 558.8 |
24 | 610 | 609.6 |
Nominal Piping Size (NPS) | Outside Diameter at Bevel D | Center-to-End | |
90 Deg Elbows A | 45 Deg Elbows B | ||
1/2 | 21.3 | 38.1 | 15.7 |
3/4 | 26.7 | 38.1 | 19.1 |
1 | 33.4 | 38.1 | 22.4 |
1-1/4 | 42.2 | 47.8 | 25.4 |
1-1/2 | 48.3 | 57.2 | 28.4 |
2 | 60.3 | 76.2 | 35.1 |
2-1/2 | 73.0 | 95.2 | 44.4 |
3 | 88.9 | 114.3 | 50.8 |
3-1/2 | 101.6 | 133.4 | 57.2 |
4 | 114.3 | 152.4 | 63.5 |
5 | 141.3 | 190.5 | 79.2 |
6 | 168.3 | 228.6 | 95.2 |
8 | 219.1 | 304.8 | 127.0 |
10 | 273.0 | 381.0 | 158.8 |
12 | 323.8 | 457.2 | 190.5 |
14 | 355.6 | 533.4 | 222.2 |
16 | 406.4 | 609.6 | 254.0 |
18 | 457 | 685.8 | 285.8 |
20 | 508 | 762.0 | 317.5 |
22 | 558 | 838.2 | 342.9 |
24 | 610 | 914.4 | 381.0 |
Tubing O.D. | Radius | Material | Radius |
---|---|---|---|
1.25”, 31.75mm, 1 ¼-inches | 2”, 50.8mm, 2-inches | Stainless steel and Inconel | |
0.25”, 6.35mm, ¼-inch | .5”, 12.7mm, ½-inch | Stainless steel | .5625”, 14.28mm, 9/16-inch |
1”, 25.4mm, 1-inch | 1.5”, 38mm, 1 ½-inches | Stainless steel and Aluminum | |
.375”, 9.52mm, ⅜-inch | .9375”, 23.8mm, 15/16-inch | Stainless steel and Copper | |
1.5”, 38mm, 1 ½-inches | 2.25”, 57.15mm, 2 ¼-inches | Stainless steel | |
.5”, 12.7mm, ½-inch | .5”, 12.7mm, ½-inch | Stainless steel | 1.5”, 38mm, 1 ½-inches |
.75”, 19mm, ¾-inch | 1.125”, 28.5mm, 1 -⅛” inches | Stainless steel and Aluminum |
✠ Calculating Wall Thickness
ISO 161-1 uses the following formula to calculate the wall thickness of pipes:
✠ Calculating Standard Dimension Ratio
Using the same variables as above, the standard dimension ratio (i.e. SDR) of a pipes can be calculated thusly:
SDR = da/s
HDPE Pipes SDR | Min. Long-Term Cold Bending Radius |
9 or less | 20x O.D. |
11, 13.5 | 25x O.D. |
15.5, 17, 21 | 27x O.D. |
26 | 34x O.D. |
32.5 | 42x O.D. |
41 | 52x O.D. |
With fitting or flange present in bends |
100x O.D. |
✠ Calculating CLR (Center Line Radius) for Bending Angle
For example, if your die creates a 2.2 inch radius, and you need to create a 35° bends
3.1416(2x2.2) = 13.823/360 = 0.0384
to calculate CLR of 35° bends
0.0384 x 35 = 1.344”
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