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| Hot Induction Bends-ANSI/ASME B16.49,API 5L PSL1/PSL2 |
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| Model No.︰ | ANSI/ASME B16.4 |
| Brand Name︰ | ANSI/ASME B16.49 |
| Country of Origin︰ | - |
| Unit Price︰ | - |
| Minimum Order︰ | - |
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| Nominal Pipe Size in |
Outside diameter O.D.(mm) |
BENDING RADIUS(mm) |
Angle Bending
θ |
Tangent Length at Each end |
Wall Thickness (mm) |
| 3D |
4D |
5D |
6D |
8D |
10D |
| 3" |
89 |
267 |
356 |
445 |
534 |
712 |
890 |
90°,60°
45°,30°
22.5°,or
as per
the choice
of purchaser |
350 |
Sch STD,
sch10,Sch20,
Sch30,Sch40,
Sch80,etc.
or as per
the choice
of purchaser |
| 4" |
114 |
342 |
456 |
570 |
684 |
912 |
1140 |
350 |
| 6" |
168 |
504 |
672 |
840 |
1008 |
1344 |
1680 |
350 |
| 8" |
219 |
657 |
876 |
1095 |
1314 |
1752 |
2190 |
700 |
| 10" |
273 |
819 |
1092 |
1365 |
1638 |
2184 |
2730 |
700 |
| 12" |
325 |
975 |
1300 |
1625 |
1950 |
2600 |
3250 |
700 |
| 14" |
356 |
1068 |
1424 |
1780 |
2136 |
2848 |
3560 |
700 |
| 16" |
406 |
1218 |
1624 |
2030 |
2436 |
3248 |
4060 |
700 |
| 18" |
457 |
1371 |
1828 |
2285 |
2742 |
3656 |
4570 |
1000 |
| 20" |
508 |
1524 |
2032 |
2540 |
3048 |
4064 |
5080 |
1000 |
| 22" |
559 |
1677 |
2236 |
2795 |
3354 |
4472 |
5590 |
1000 |
| 24" |
610 |
1830 |
2440 |
3050 |
3660 |
4880 |
6100 |
1000 |
| 26" |
660 |
1980 |
2640 |
3300 |
3960 |
5280 |
6600 |
1D (Outside
diameter of
bend)or
as per
the choice
of purchaser |
| 28" |
711 |
2133 |
2844 |
3555 |
4266 |
5688 |
7110 |
| 30" |
762 |
2286 |
3048 |
3810 |
4572 |
6096 |
7620 |
| 32" |
813 |
2439 |
3252 |
4065 |
4878 |
6504 |
8130 |
| 34" |
864 |
2592 |
3456 |
4320 |
5184 |
6912 |
8640 |
| 36" |
914 |
2742 |
3656 |
4570 |
5484 |
7312 |
9140 |
| 38" |
965 |
2895 |
3860 |
4825 |
5790 |
7720 |
9650 |
| 40" |
1016 |
3048 |
4064 |
5080 |
6096 |
8128 |
10160 |
| 42" |
1067 |
3201 |
4268 |
5335 |
6402 |
8536 |
10670 |
| 44" |
1118 |
3354 |
4472 |
5590 |
6708 |
8944 |
11180 |
| 46" |
1168 |
3504 |
4672 |
5840 |
7008 |
9344 |
11680 |
| 48" |
1219 |
3657 |
4876 |
6095 |
7314 |
9752 |
12190 |
| 50" |
1270 |
3810 |
5080 |
6350 |
7620 |
10160 |
12700 |
| 52" |
1321 |
3963 |
5284 |
6605 |
7926 |
10568 |
13210 |
| 54" |
1372 |
4116 |
5488 |
6860 |
8232 |
10976 |
13720 |
| 56" |
1422 |
4266 |
5688 |
7110 |
8532 |
11376 |
14220 |
Bend end preparation:Welding ends to be beveled as per ASME B16.25 or as per specified by purchaser.
Induction Pipe Bending Standard Bend Tolerances
Bend Angle:±1/2°
Bend Radius:±1%
Bend Plane:±1°
End squareness
Size NPS36" and smaller:2.4mm(0.09")
Size Greater than NPS36":3.0mm(0.12")
Linear Dimensions
Size Nps24" and smaller:±5mm(0.19")
Size Greater than NPS 24":±6mm(0.25")
Thinning: <0.10% of the bend nominal wall thickness
or ≤50D/R(%)(R=bend centerline radius,
D=nominal outside diameter of starter stock)
or ≤0.05% of the nominal wall thickness of the matching pipe.
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| Specifications︰ | ANSI/ASME B16.49-2001 Factory-Made Wrought Steel Buttwelding Induction Bends for Transportation and Distribution Systems
MSS SP-75 Specification for High-Test,Wrought,Butt-Welding Fittings
EN 14870-1 Petroleum and natural gas industries. Induction bends, fittings and flanges for pipeline transportation systems-Part 1: Induction Bends
ISO 15590-1:2004, Petroleum and natural gas industries. Induction bends, fittings and flanges for pipeline transportation systems. Part 1. Induction bends
Total GS EP PLR 221 Fabrication of hot bends for pipelines (sweet service) |
| Standard Met︰ | Induction Bending is a controlled means of bending pipes through the application of local heating using high frequency induced electrical power.
Originally used for the purpose of surface hardening steels, induction technology when used in pipe bending consists basically of an induction coil placed around the pipe to be bent. The induction coil heats a narrow, circumferential section of the pipe to a temperature of between 850 and 1100 degrees Celsius (dependant on the material to be formed). As the correct bending temperature range is reached, the pipe is moved slowly through the induction coil whilst the bending force is applied by a fixed radius arm arrangement.
As the bending occurs, the adjacent area forward of the heat band is water or air quenched (or may be allowed to cool naturally) thereby allowing the cool material to either side of the ‘heat band’ to retain the integrity of the original material as best as possible. This means of distortion control provides excellent dimensional accuracy and repeatability.
Achieved tolerances when forming induction bends are to some extent governed by the materials in hand and the required format of the finished product.
Although induction bending produces excellent results as far as physical properties are concerned, it must be noted that there are two important considerations required – firstly the reduction in wall thickness at the outside (extrados) of the bend and secondly the degree of ovality which is present.
The induction pipe bending process uses induction heating to produce highly accurate bends. The quality of induction bends is superior to the elbow fitting. Hydro burst tests show that spools with induction bends fail in the straight pipe and not in the bend, whereas in comparable elbow-based systems the elbow (inside radius) is always the first to burst. Stress calculations confirm this. The natural tendency to have a thicker inside wall thus proves to be advantageous and ensures that the bend exceeds the strength of the straight pipe.
Material:
1.Carbon steels such as API 5L Gr B / ASTM A106 Gr B
2. High-yield steels from API 5L X42 through to X80(including internally clad)
3. Low-temperature materials, e.g. ASTM A333 Gr 6
4. Duplex and super-duplex steels, e.g. 22% Cr (UNS S31803) and 25% Cr (UNS S32750 / 60)
5. High-chrome materials, including ASTM A335 P11, P22 and P91, etc.
6. Stainless steels – ASTM A312 304L, 316L, 321, etc.
7. 'Special' steels such as AISI 4130, Inconel, Hastelloy
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