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.

3D Pipe bending

5D Pipe bending

7D Pipe bending

12D Pipe bending

180 Degree pipe bending

Large size pipe bending

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

Bend pipe 90 deg, STPG38

Butt-welded pipe bending

Seamless pipe bending

Small size pipe bending

High pressure pipe bending

API pipe bend

The ends of our elbows are designed for your convenience on-site, and are able to be machined for butt, threaded, or socket welding.

 

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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

Testing

Measurement wall thickness

Measuement out diameter

Ensure the thickness of the outer wall

Protect the end of the bending

Large size bendings be packed in containers

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.

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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"

Pressure: SCH5 to SCH160

• 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

Example: Find the length of pipe required to make a 90 bend with a radius of 30"

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