Pipe bending
The pipe bending is used to change the direction of run of pipe.
It advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design.
We are passionate about pipe bending:
Pipe bend, Bend pipe, Pipe bending, ANSI, ISO, JIS and DIN Standards, Measures 1/2 to 56 Inches.
The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design. usually,the bends consist of 3D, 5D, 7D and 12D series.
Methods of bends in carbon steel
While the industry provides various means for bending the carbon steel pipe to the 5D bend, heat induction is the most widely-known–but not the most popular–technique in the industry. The pipe to be bent is subjected to extreme temperature, and when at the desired heat, a mode or model in the dimensions of the 5D bends is forced through the heated pipe, causing the pipe to conform to the bend of the 5D pipe dimensions. Carbon steel is the hardest pipe material used in this manner, and heat induction is the best means to curve the carbon steel pipe into the 5D curvature.
Uses
Heat-processed 5D bend pipes are used in all oil and gas lines, and the factory testing exceeds the quality standards required by the oil and gas industry. This is an industry where quality standards can be linked to safety standards.
What You Are Buying
Customers obtain a wide range of bend geometries and total design flexibility with customized radius and angle. Qualified subcontractors carry out hot induction bending with state-of-the-art technology, giving full control of the bending process, as well as total monitoring of all bending parameters.
1) Heat Induction Bends for Oil and Gas Industry
The production of high-quality bends depends on the manufacturing process of the steel pipe that is transformed into the bend. During the hot-induction bending process, unavoidable thinning occurs. Therefore, a custom- and precision-made mother pipe must be produced in order to comply with minimum wall thickness after the bending is complete.
Heat treatment is carried out on each bend in order to achieve the required degree and mechanical properties after bending. For critical applications (such as high-strength steel, heavy wall, sour service or low-temperature) full quenching and tempering after bending is still performed as a preferred process. Machining the bend ends guarantees top tolerances of inside diameters of the pipe. We therefore ensure the bend has the minimum working strengths of the mother pipe.
World-class bending manufacturers provide high quality bending solutions for oil and gas pipelines, either onshore or offshore. The bends manufacturing and testing procedures exceed all quality standards required by the oil and gas industry.
2) Cold Bending Process
High quality bending solutions are more than critical. Cold-bending is commonly used over hot-bending because certain types of steel and metal alloys can be weakened. You cannot allow the pipes to be weakened in any way as this can lead to damage of your product, your plant, or cause risks of injury to your employees. Cold-bending is also preferred by many industries because of its affordability, with costs being less than that of heat induction.
Cold-bending 5D bends is a continuous operation where a long strip of metal, usually steel, is passed through sets of rollers, with each set of rollers performing only a part of the bend, until the desired cross-section profile is obtained. Roll-forming is ideal for producing parts with long lengths or in large quantities. Roll-Forming is also generally a lower cost process than other metal forming processes. Cold-processed bends are used in construction, water piping and as machinery parts.
Sunny Steel provides fast, dependable metal custom-bending for:
- angle
- flat bar
- round tube
- pipe
- square tube
- Ibeams
- channel
- finned tube
We specialize in bending, fabricating and testing of heating and cooling coils. We are proud of our leading reputation in the industry with our attitude of professional workmanship and on-time delivery. Some of our advantages over competitors include:
- Fast Turnaround Times
- Dependability
- Outstanding Reputation
- Custom Pipe Bending
- Custom Oil Field Bending
- Architectural Application Bending
- Heating and Cooling Coil Fabrication
Sunny Steel fabricates all types and sizes of cooling coils from 1/8″ pipe to 8″ pipe and all alloys.
Recommended pipe bending
The ends of our elbows are designed for your convenience on-site, and are able to be machined for butt, threaded, or socket welding.
Pipe bending reference
Just before the final delivery, our merchandise are stringently checked by a team of quality analyzers on varied parameters, which guarantee their flawlessness and durability. In addition, clients can avail these goods from us at competitive rates.
Standards
ASTM
- ASME/ANSI B16.49 Factory-Made Wrought Steel Buttwelding Induction Bends for Transportation and Distribution Systems
- ASTM A403 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
- ISO 2851 tainless steel bends and tees for the food
JIS
- JIS B2311 Universal steel butt-welding pipe fittings
- JIS B2312 Steel butt-welding pipe fittings
- JIS B2313 Steel plate butt-welding pipe fittings
- JIS B 2321:1995Aluminium and aluminium alloy butt-welding pipe fittings
EURO
- DIN 3867 Non-soldering compression couplings - Pressure bush for butt joints
- DIN 2609 Steel butt-welding pipe fittings; technical delivery conditions
- BS 1640 Specification for steel butt-welding pipe fittings for the petroleum industry
- BS 1965 Butt welding pipe fittings for pressure purpose
- STPG38
Inspection, packing & delivery
Materials
They are manufactured utilizing higher grade raw material, advanced machines and technologies.
- Abrasion resistant: Cearmic lined, Ceramic tile, Bi-metal clad pipe bending, Rare earth alloy wear-resistant pipe bending
- Carbon steel:
- SA234 WPB, SA234 WPC,SA42 WPL6, SA42 WPL3
- WP1. MSS-SP75, WPHY,WPHY 46,WPHY 52
- WPHY 56,WPHY 60,WPHY 65, WPHY 70
- DIN 1629 St37, RST37.2 St52, STPG38
- Stainless:
- ASTM/ASME SA403 304,304L ,316, 316L, WP304L, 3 WP316 WP347 (H) ,WP317 (L),WP321.
- DIN 1.4301, 1.4306, 1.4401, 1.4571
- JIS SUS304,SUS304, SUS304L, SUS316, SUS316
- Alloy:
- ASTM/ASME SA234 WP12, WP11,WP22, WP5, WP9, WP91, ASTM B361 GR.3003-6061, ASTM B366 UNS
- N04400,N08800, N08825 N1001-N10276-N10665, WPT2-WPT12
- ASTM 182 F1, F5, F6, F7, F9, F11, F12, F22, F51, 16MnR Cr5Mo
- 12Cr1MoV 10CrMo910 15CrMo 12Cr2Mo1, St45.8
Pipe bend FAQs
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe. Pipes and pipe fittings are made of a variety of materials, depending on the fluid or gas being transported. Most pipe fittings tend to be either threaded or able to slip over the pipes they connect. Whether you are using steel pipes of PVC pipes, a chemical solvent is required to create a seal between the pipe and the fittings.
Measure the required length of the pipe to be installed, keeping in mind the extra length required where the pipe will be inserted into the fitting. Mark this length on the pipe.
How to Calculate a Pipe Bend?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe. Pipes and pipe fittings are made of a variety of materials, depending on the fluid or gas being transported. Most pipe fittings tend to be either threaded or able to slip over the pipes they connect. Whether you are using steel pipes of PVC pipes, a chemical solvent is required to create a seal between the pipe and the fittings.
Measure the required length of the pipe to be installed, keeping in mind the extra length required where the pipe will be inserted into the fitting. Mark this length on the pipe.
Bevelled Ends
The ends of all buttweld fittings are bevelled, exceeding wall thickness 4 mm for austenitic stainless steel, or 5 mm for ferritic stainless steel. The shape of the bevel depending upon the actual wall thickness. This bevelled ends are needed to be able to make a "Butt weld".
Welding Bevel acc.to ASME / ANSI B16.9 and ASME / ANSI B16.28
ASME B16.25 covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances).
Our in-hourse R&D team developed bevel ends equipment are good using in thickness 2mm to 20mm pipe fittings, guarantee high efficiency and high quality.
Send us your technical drawings
These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).
ASME B16.25 (BUTT WELD ENDS)
ASME B16.25 sets standards for the preparation of the ends of components that need to be welded together.
Cut square or slight chamfer, at manufacturer’s option for :
- t ≤ 0.19” carbon steel or ferritic alloy steels
- t ≤ 0.12” austenitic alloy steels
Buttweld Fittings general
A pipe fitting is defined as a part used in a piping system, for changing direction, branching or for change of pipe diameter, and which is mechanically joined to the system.
There are many different types of fittings and they are the same in all sizes and schedules as the pipe.
Pipe bend, Bend size range
The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design.
-
Constants for Pipe Bends:
- Formula:
- L = R x B
- L = Length of pipe required
- R = Radius of bend
- B = Constant from table used to find "L"
- L =30 x 1.5705 =47.115 in.or 47-1/8"
- Bending radius(R): R=3D, 5D, 7D and 12D
- Bending angle (θ):15°, 30°, 45°, 60°, 90°, 135°, 180°
- Outer diamete(D): D≤1800mm
- Wall thickness(T): T≤120mm
- Straight Length (L): The length between two ends general from 300mm-1500mm
| Nominal pipe DN size |
Outside Diameter at Bevel | Center to End | ||||
D1 |
D2 |
C |
M |
|||
| Series A | Series B | Series A | Series B | |||
20×15 |
26.9 |
25 |
21.3 |
18 |
29 |
29 |
25×20 25×15 |
33.7 33.7 |
32 32 |
26.9 21.3 |
25 18 |
38 38 |
38 38 |
32×25 32×20 32×15 |
42.4 42.4 42.4 |
38 38 38 |
33.7 26.9 21.3 |
32 25 18 |
48 48 48 |
48 48 48 |
40×32 40×25 40×20 40×15 |
48.3 48.3 48.3 48.3 |
45 45 45 45 |
42.4 33.7 26.7 21.3 |
38 32 25 18 |
57 57 57 57 |
57 57 57 57 |
50×40 50×32 50×25 50×20 |
60.3 60.3 60.3 60.3 |
57 57 57 57 |
48.3 42.4 33.7 26.9 |
45 38 32 25 |
64 64 64 64 |
60 57 51 44 |
65×50 65×40 65×32 65×25 |
76.1(73) 76.1(73) 76.1(73) 76.1(73) |
76 76 76 76 |
60.3 48.3 42.4 33.7 |
57 45 38 32 |
76 76 76 76 |
70 67 64 57 |
80×65 80×50 80×40 80×32 |
88.9 88.9 88.9 88.9 |
89 89 89 89 |
76.1(73) 60.3 48.3 42.4 |
76 57 45 38 |
86 86 86 86 |
83 76 73 70 |
90×80 90×65 90×50 90×40 |
101.6 101.6 101.6 101.6 |
- - - - |
88.9 76.1(73) 60.3 48.3 |
- - - - |
95 95 95 95 |
92 89 83 79 |
100×90 100×80 100×65 100×50 100×40 |
114.3 114.3 114.3 114.3 114.3 |
- 108 108 108 108 |
101.6 88.9 76.1(73) 60.3 48.3 |
- 89 76 57 45 |
105 105 105 105 105 |
102 98 95 89 86 |
125×100 125×90 125×80 125×65 125×50 |
139.7 139.7 139.7 139.7 |
133 - 133 133 133 |
114.3 101.6 88.9 76.1(73) 60.3 |
108 - 89 76 57 |
124 124 124 124 124 |
117 114 111 108 105 |
150×125 150×100 150×90 150×80 150×65 |
168.3 168.3 168.3 168.3 168.3 |
159 159 - 159 159 |
139.7 114.3 101.6 88.9 76.1(73) |
133 108 - 89 76 |
143 143 143 143 143 |
137 130 127 124 121 |
200×150 200×125 200×100 200×90 |
219.1 219.1 219.1 219.1 |
219 219 219 - |
168.3 139.7 114.3 101.6 |
159 133 108 - |
178 178 178 178 |
168 162 156 152 |
200×200 200×150 200×125 200×100 |
273.0 273.0 273.0 273.0 |
273 273 273 273 |
219.1 168.3 139.7 114.3 |
219 159 133 108 |
216 216 216 216 |
208 194 191 184 |
300×250 300×200 300×150 |
323.9 323.9 323.9 |
325 325 325 |
273.0 219.1 168.3 |
273 219 159 |
254 254 254 |
241 229 219 |
300×125 |
323.9 |
325 |
139.7 |
133 |
254 |
216 |
350×300 350×250 350×200 350×150 |
355.6 355.6 355.6 355.6 |
377 377 377 377 |
323.9 273.0 219.1 168.3 |
325 273 219 159 |
279 279 279 279 |
270 257 248 238 |
400×350 400×300 400×250 400×200 400×150 |
406.4 406.4 406.4 406.4 406.4 |
426 426 426 426 426 |
355.6 323.9 273.0 219.1 168.3 |
377 325 273 219 159 |
305 305 305 305 305 |
305 295 283 273 264 |
450×400 450×350 450×300 450×250 450×200 |
457.2 457.2 457.2 457.2 457.2 |
478 478 478 478 478 |
406.4 355.6 323.9 273.0 219.1 |
426 377 325 273 219 |
343 343 343 343 343 |
330 330 321 308 298 |
500×450 500×100 500×350 500×300 500×250 500×200 |
508.0 508.0 508.0 508.0 508.0 508.0 |
529 529 529 529 529 529 |
457.2 406.4 355.6 323.9 273.0 219.1 |
478 426 377 325 273 219 |
381 381 381 381 381 381 |
368 356 356 346 333 324 |
550×500 550×450 550×400 |
559 559 559 |
- - - |
508 457 406 |
- - - |
419 419 419 |
406 394 381 |
600×550 600×550 600×450 |
610 610 610 |
- 630 630 |
559 508 457 |
- 530 480 |
432 432 432 |
432 432 419 |
650×600 650×550 650×500 |
660 660 660 |
- - - |
610 559 508 |
- - - |
495 495 495 |
483 470 457 |
700×650
700×600 700×550 |
711
711 711 |
-
720 - |
660
610 559 |
-
630 - |
521
521 521 |
521
508 495 |
750×700 750×650 750×600 |
762 762 762 |
- - - |
711 660 610 |
- - - |
559 559 559 |
546 546 533 |
800×750 800×700 800×650 |
813 813 813 |
- 820 - |
762 711 660 |
- 720 - |
597 597 597 |
584 572 572 |
850×800 850×750 850×700 |
864 864 864 |
- - - |
813 762 711 |
- - - |
635 635 635 |
622 610 597 |
900×850 900×800 900×750 |
914 914 914 |
- 920 - |
864 813 762 |
- 820 - |
673 673 673 |
660 648 635 |
950×900 950×850 950×800 |
965 965 965 |
- - - |
914 864 813 |
- - - |
711 711 711 |
711 698 686 |
1000×950 1000×900 1000×8500 |
1016 1016 1016 |
- 1020 - |
965 914 864 |
- 920 - |
749 749 749 |
749 737 724 |
1000×1000 1050×950 1050×900 |
1067 1067 1067 |
- - - |
1016 965 914 |
- - - |
762 762 762 |
711 711 711 |
1100×1050 1100×1000 1100×950 |
1118 1118 1118 |
- 1120 - |
1067 1016 965 |
- 1020 - |
813 813 813 |
762 749 737 |
1150×1100 1150×1050 1150×1000 |
1168 1168 1168 |
- - - |
1118 1067 1016 |
- - - |
851 851 851 |
800 787 775 |
1200×1150 1200×1100 1200×1050 |
1220 1220 1220 |
- 1220 - |
1168 1118 1067 |
- 1120 - |
889 889 889 |
838 838 813 |
| Nominal pipe size | Outside Diameter at Bevel | Center to End | |||
| D | C | M | |||
| DN | INCH | Series A | Series B | ||
15 |
1/2 |
21.3 |
18 |
25 |
|
20 |
3/4 |
26.9 |
25 |
29 |
|
25 |
1 |
33.7 |
32 |
38 |
|
32 |
11/4 | 42.4 |
38 |
48 |
|
40 |
11/2 | 48.3 |
45 |
57 |
|
50 |
2 | 60.3 |
57 |
64 |
|
65 |
21/2 |
76.1(73) |
76 |
76 |
|
80 |
3 |
88.9 |
89 |
86 |
|
90 |
31/2 |
101.6 |
― |
95 |
|
100 |
4 |
114.3 |
108 |
105 |
|
125 |
5 |
139.7 |
133 |
124 |
|
150 |
6 |
168.3 |
159 |
143 |
|
200 |
8 |
219.1 |
219 |
178 |
|
250 |
10 |
273.0 |
273 |
216 |
|
300 |
12 |
323.9 |
325 |
254 |
|
350 |
14 |
355.6 |
377 |
279 |
|
400 |
16 |
406.4 |
426 |
305 |
|
450 |
18 |
457.2 |
478 |
343 |
|
500 |
20 |
508.0 |
529 |
381 |
|
550 |
22 |
559 |
― |
419 |
|
600 |
24 |
610 |
630 |
432 |
|
650 |
26 |
660 |
― |
495 |
|
700 |
28 |
711 |
720 |
521 |
|
750 |
30 |
762 |
― |
559 |
|
800 |
32 |
813 |
820 |
597 |
|
850 |
34 |
864 |
― |
635 |
|
900 |
36 |
914 |
920 |
673 |
|
950 |
38 |
965 |
― |
711 | |
1000 |
40 |
1016 |
1020 |
749 |
|
1050 |
42 |
1067 |
― |
762 |
711 |
1100 |
44 |
1118 |
1120 |
813 |
762 |
1150 |
46 |
1168 |
― |
851 |
800 |
1200 |
48 |
1220 |
1220 |
889 |
838 |
