Hot Induction Bends

Hot Induction Bends

This is an automated process where pipes are passed through an induction bending system, that uses an induction coil (heating) that heats the slim circumference band of the pipe cloth. The tube will bend into the desired radius of curvature as it is being driven from the induction system.
Inspection guidelines are pointers followed by the induction machine to yield the required bend.

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Hot induction bends specifications

Manufacturing Size Range Of Hot Induction Bends Induction Bends Forming Radius of Hot Induction Bend
  • Buttweld : 1/2″ To 24″
  • Seamless : ½” to 32″
  • Welded : 12″ to 60″
  • DN15 to DN1500

For larger sizes please contact above hot induction bend manufacturer in UAE

  • Hot Formed
Standards Of Hot Bend Pipeline Angle Of Hot Bends Hot Pipe Bending End
  • ASME B31.4 – Pipeline transportation for liquids
  • ASME B31.8 – Gas transmission piping systems
  • ASME B16.49 – Wrought steel butt welding
  • ASME B16.9 – Factory made wrought buttwelding
  • ASME B16.25 – Butt welding ends
  • MSS SP-97
  • ISO 15590-1
  • 15 Degree
  • 20 Deg
  • 45 Degree
  • 60 Deg
  • 90 Degree
  • 135 Deg
  • 180 Degree
  • Bevel
  • Plain
  • Buttweld
Surface Treatment Of ISO 15590-1 Induction Bends Hot Formed Bends Weight Calculation Documentation
  • Transparent oil
  • Rust proof black oil
  • Hot galvanized
  • Anti-rust Oil
  • Anti-rust Paint
  • R = Radius
  • θ = Angle
  • L = Weight of double sides straight length
  • D = O.D.
  • T = Wall Thickness
  • Raw material test reports
  • Heat treatment charts
  • Material test certificates (MTC)
  • Welding procedure specification
Hot Induction Pipe Bends Wall Thickness Common Considerations For Buying Hot Beding Available 90 Degree Hot Induction Bend Coatings
  • SCH 10
  • SCH 20
  • SCH 40
  • SCH 60
  • SCH 80
  • SCH 160
  • SCH 180
  • Size
  • Design
  • Temperature ratings
  • Coatings
  • Materials
  • End connections
  • Marking
  • Dimensions
  • Tolerances
  • Threading
  • Pattern taper
  • Epoxy Coated
  • 3PE Coatings
  • FBE Coatings
  • Black paint
Hot Induction Bends Pipeline Meet The Requirements Of Application For Induction Pipe Bending Marking On Induction Bending
  • NACE TM-0284
  • Sour service
  • NACE MR0103
  • ISO 15156
  • NACE MR0175
  • Power Generation
  • Chemical Processing
  • Water Treatment
  • Oil and Gas
  • Hydraulic system
  • Gas fittings
  • Air brake fittings
  • Handling the expansion
  • Marine Applications

Above hot induction bends suppliers have ex-stock and already supplied to many countries such as Egypt, Saudi Arabia, South Africa, USA, Mexico & Oman

  • Sizes
  • ASTM standard
  • Material & grade
  • Heat Number
  • Thickness- schedule
  • Pressure class
  • Manufacturer name/ logo
  • Origin of country
Bending Technique Of Induction Bending Suitable Temperature Of Hot Bend Heat Induction Bending Hydro Pressure Testing
  • Tensile bending
  • Roll bending
  • Compression bending
  • Liquid filling bending
  • Mandrel bending
  • Press bending
  • Heating bending
  • Up to 1,100ºC
  • Up to 700 bars
Induction Hot Pipe Bending Welding Method Testing & Inspection Of Cold Bend Pipeline Hot Bend Pipeline Process
  • SMAW welding (Shielded metal arc)
  • GMAW welding (Gas metal arc)
  • FCAW welding (Flux cored arc)
  • TIG welding (Tungsten inert gas)
  • Mechanical testing
  • Beveling machine
  • Thickness gauge
  • Corrosion testing
  • Hydrogen-induced cracking (HIC)
  • Universal testing machine
  • Charpy testing
  • Hardness tester
  • Hydro testing
  • Pipe Diameter
  • Surface Contamination
  • Process Parameters
  • Bend Radius
  • Bend Angle
  • Process Interruptions
Manufacturing Process Heat Treatment Value Added Services
  • Bending
  • Squeezing
  • Pressing
  • Forging
  • Machining
  • Normalizing
  • Normalizing and tempering
  • Quenching and tempering
  • Solution annealing
  • Polishing
  • Hot dipped galvanized
  • Metal stampings
  • Beveling end
  • MTR’s Available
  • Cutting
  • 24-hour emergency service

 

Hot bend pipeline induction bending process according to iso 15590-1, PFI ES 24, & ASME B 31.1/ 31.3/ 31.4, API 5L induction bend available in 3D/ 5D/ 7D/ 7.5D redii

Types of induction bend

Hot induction 45 deg bend

Hot induction 45 deg bend

Induction 90 degree bend

Induction 90 degree bend

Hot 180 degree pipe bend

Hot 180 degree pipe bend

Hot formed long radius bend

Hot formed long radius bend

Heat induction short radius bend

Heat induction short radius bend

Hot induction U bend

Hot induction U bend

 

5D induction bend dimensions

5D induction bend dimensions

Nominal Size Bend Radius Centre to Face Wall Thickness in MM
NPS X and Y SCH STD SCH XS
50 250 As required 3.91 5.54
65 325 5.16 7.01
80 400 5.49 7.62
90 450 5.74 8.08
100 500 6.2 8.56
125 625 6.55 9.53
150 750 7.11 10.97
200 1000 8.18 12.70
250 1250 9.27 12.70
300 1500 9.53 12.70
350 1750 9.53 12.70
400 2000 9.53 12.70
450 2250 9.53 12.70
500 2500 9.53 12.70
600 3000 As required 9.53 12.70

 

ISO 15590-1 induction bends dimensions

STD (SCH 40)

ISO 15590-1 induction bends dimensions

 

Nominal Pipe Size Inside Diameter Wall Thickness Outside Diameter
NPS ID T OD
1/2 0.622 0.109 0.84
3/4 0.824 0.113 1.05
1 1.049 0.133 1,315
1 1/4 1.38 0.14 1.66
11/2 1.61 0.145 1,90
2 2,067 0.154 2,375
2 1/2 2.469 0.203 2.875
3 3.068 0.216 3.50
31/2 3.548 0.226 4.00
4 4.026 0.237 4.50
5 5.047 0.258 5.563
6 6.065 0.28 6.625
8 7.981 0.322 8.625
1 10.02 0.365 10.75
12 12,00 0.375 12,75
14 13.25 0.375 14.00
16 15.25 0.375 16.00
18 17.25 0.375 18.00
2 19.25 0.375 20.00
22 21.25 0.375 22.00
24 23.25 0.375 24.00
26 25,25 0.375 26.00
28 27.25 0.375 28.00
3 29,25 0.375 30.00
32 31,25 0.375 32,00
34 33.25 0.375 34.00
36 35.25 0.375 36.00
38 37.25 0.375 38,00
4 39.25 0.375 40.00
42 41,25 0.375 42.00
44 43.25 0.375 44,00
46 45.25 0.375 46.00
48 47.25 0.375 48.00

 

XS (SCH 80)

ISO 15590-1 induction bends dimensions XS (SCH 80)

Nominal Pipe Size Inside Diameter Wall Thickness Outside Diameter
NPS ID T OD
1/2 0.54 0.14 0.84
3/6 0.742 0.154 1.050
1 0.957 0.179 1,315
11/4 1.278 0.191 1.660
11/2 1,50 0.20 1,90
2 1.939 0.218 2,375
2 1/2 2.323 0.276 2.875
3 2,90 0.30 3,50
31/2 3.364 0.318 4.00
4 3,826 0.337 4,50
5 4.813 0.375 5.563
6 5.761 0.432 6.625
8 7.625 0.50 8,625
10 9.562 0.594 10.75
12 11.374 0.688 12,75
14 12.500 0.750 14,00
16 14.312 0.844 16.00
18 16.124 0.938 18.00
20 17.938 1,031 20,00
22 19.750 1.125 22.00
24 21.562 1.219 24.00
26 25.00 0.50 26.00
28 27.00 0.50 28.00
3 29.00 0.50 30.00
32 31.00 0.50 32.00
34 33.00 0.50 34.00
36 35.00 0.50 36.00
38 37,00 0.50 38.00
4 39.00 0.50 40.00
42 41.00 0.50 42.00
44 43.00 0.50 44,00
46 45.00 0.50 46.00
48 47,00 0.50 48.00

 

ISO 15590-1 induction bends dimensions

NPS O.D. Schedule 20 Schedule 60 Schedule 100 Schedule 120
1/2 0.84
3/4 1.05
1 1.31
1 1/4 1.66
1 1/2 1.90
2 2.37
2 1/2 2.87
3 3.50
4 4.50 0.438
5 5.56 0.50
6 6.62 0.562
8 8.62 0.250
10 10.75 0.250 0.406 o.594 0.719
12 12.75 0.250 0.562 0.844
14 14.00 0.312 0.594 0.938 1.094
16 16.00 0.312 0.656 1.031 1.219
18 18.00 0.312 0.750 1.156 1.375
20 20.00 0.375 0.812 1.281 1.500
22 22.00 0.375 0.812 1.281 1.500
24 24.00 0.375 0.969 1.531 1.812

 

Hot induction bend weight

Normal Pipe Size Weight Thickness
2.5 7.66 0.276
3 10.25 0.300
4 11.35 0.230
4 14.98 0.337
5 14.62 0.258
5 20.78 0.375
6 18.97 0.280
6 28.57 0.432
8 28.55 0.322
8 43.39 0.500
10 40.48 0.365
10 54.74 0.500
12 49.56 0.375
12 65.42 0.500
14 54.57 0.375
14 72.09 0.500
16 62.58 0.375
16 82.77 0.500
18 95.64 0.500
20 106.57 0.500

 

Difference between cold bend and hot bend

Cold bend Hot bend
Efficient for small pipe diameter Efficient for larger pipe diameter
No heating required Heating required
Fast Process Slow Process
No heating required Heating required
Better surface finish It can be bent easily
Improved strength properties Less non-destructive testing
Does not provide precise control Better control
Low cost High cost

 

Most selling induction bends coating

PTFE coating 3LPE coating
Phenolic Epoxy coating Glass Flake coatings
Elastomeric Polyurethane coating Any Liquid Epoxy coating
Halar coatings FBE coating
Internal coating External coating

 

Hot pipe bending material

Stainless Steel Hot Induction Bends Carbon Steel Hot Induction Bends Alloy Steel Hot Induction Bends
  • ASTM A403 WP304 induction bends
  • ASTM A403 WP304L
  • ASTM A403 WP316 hot bend pipeline
  • SA403 gr WP316L/ 316Ti
  • ASTM A403 WP310
  • SS 317L
  • ASTM A403 grade WP321
  • SA403 WP347 / 347H
  • ASTM A403 WP904L
  • ASTM A234 WPB hot bend
  • ASTM A420 WPL6 hot pipe bending
  • LTCS hot induction pipeline bends
  • ASTM A860 WPHY 52
  • ASTM A860 WPHY 60
  • ASTM A860 WPHY 65
  • ASTM A234 WP5
  • ASTM A234 WP9
  • ASTM A234 WP11 induction pipe bending
  • ASTM A234 WP22
  • ASTM A234 WP91
Nickel Alloy Hot Induction Bends Copper Nickel Hot Induction Bends Titanium Hot Induction Bends
  • Inconel 600 : ASTM B366 UNS N06600
  • Inconel 601 : ASTM B366 UNS N06601
  • Inconel 625 hot induction bends : ASTM B366 UNS N06625
  • Incoloy 800 : ASTM B366 UNS N08800
  • Incoloy 825 : ASTM B366 UNS N08825
  • Hastelloy C22 : ASTM B366 UNS N06022
  • Hastelloy C276 hot induction bends : ASTM B366 UNS N10276
  • Monel 400 hot induction bends : ASTM B366 UNS N04400
  • Monel K500: ASTM B366 UNS N05500
  • Alloy 20 : ASTM B366 UNS N08020
  • Copper nickel 90/10 : ASTM B466 UNS C70600
  • Copper nickel 70/30 : ASTM B466 UNS C71500
  • EEMUA 234
  • Titanium Grade 2 : ASTM B363 UNS R50400
  • Titanium Grade 5 : ASTM B363 UNS R56400
Duplex Steel Hot Induction Bends Super Duplex Hot Induction Bends API Hot Induction Bends
  • ASTM A815 UNS S31803
  • ASTM A815 UNS S32205
  • ASTM A815 UNS S32760
  • ASTM A815 UNS S32750
  • API 5L hot bend pipeline
  • API 5L Grade A induction bending
  • API 5L Grade B induction bends
  • API 5L X42 induction bends pipeline
  • API 5L X52 butt weld hot induction pipe bends
  • API 5L X60 hot beding
  • API 5L X65 90 degree hot induction bend
  • API 5L X70 hot induction pipe bending
Aluminum Hot Induction Bends Copper Hot Induction Bends Mild Steel Hot Induction Bends
  • Grade 6061 : ASTM B361 UNS A96061
  • Grade 5083 : ASTM B361 UNS A95083
  • ASTM B62 UNS C12200
  • BS EN 10241
  • BS 1740
  • BS 1387

 

API 5L induction bends

API 5L induction bends

API 5L Grade B induction bend pipe

API 5L Grade B induction bend pipe

API hot bends

API hot bends

Stainless steel hot bend pipeline

Stainless steel hot bend pipeline

Carbon steel hot pipe bending

Carbon steel hot pipe bending

Alloy steel induction bends pipeline

Alloy steel induction bends pipeline

ASTM A403 WP304 5D hot induction bend

ASTM A403 WP304 5D hot induction bend

Stanless steel 316 hot formed bends

Stanless steel 316 hot formed bends

ASTM A234 Grade WPB hot induction pipe bends

ASTM A234 Grade WPB hot induction pipe bends

ASTM A420 WPL6 butt weld hot induction pipe bends

ASTM A420 WPL6 butt weld hot induction pipe bends

LTCS buttweld hot induction bend

LTCS buttweld hot induction bend

ASTM A234 WP5 90 degree hot induction bend

ASTM A234 WP5 90 degree hot induction bend

ASTM A234 Grade WP11 hot induction bends pipeline

ASTM A234 Grade WP11 hot induction bends pipeline

API 5L X60 hot induction pipe bending

API 5L X60 hot induction pipe bending

API 5L X52 induction pipe bending

API 5L X52 induction pipe bending

SS induction bending

SS induction bending

CS heat induction bending

CS heat induction bending

Mild steel induction bends

Mild steel induction bends

Inconel 625 induction hot pipe bending

Inconel 625 induction hot pipe bending

Hastelloy C276 heat induction pipe bending

Hastelloy C276 heat induction pipe bending

Super duplex cold bend pipeline

Super duplex cold bend pipeline

Duplex steel hot beding

Duplex steel hot beding

Titanium induction hot pipe bending

Titanium induction hot pipe bending

Monel 400 hot pipeline bend

Monel 400 hot pipeline bend

 

Benefits of Hot formed bends

Benefits
Corrosion resistance Strength and durability
Hygienic properties Leak prevention
Better to elbows with uniform wall thickness in terms of strength A single length of pipe can have multiple bends on it
Less need for non-destructive testing Processing flexibility
Large radius Uniform hardness

 

Induction bend tangent length

Heat induction pipe bend tangent length is the length of the straight pipe segment at each of the bend’s two ends

ASME B16.9 hot induction bends machine

Rotary draw bending machine

Roll bending machine

Ram bending machine

Pipe bending machine

Orbital head bending machine

Induction bending machine

 

Induction bending services

Procedure Of Induction Bending Post Induction Bending Process
Pipe bending to 30 inch Dia. Qualified welding
HSS (hollow structural sections) bending to 24″ x 24″ Hydro pressure test (up to 700 bar)
Structural bending to 30 inch Depth 3D robot cutting
Continuous bends to 54 inch Length Surface treatments
Complex 3D bending Welding preparation
Heat treatments
Non-destructive test (NDT)

 

Hot induction pipe bends capabilities

Pipe Dimensions
Maximum dimeter 60″
Minimum dimeter 2″
Wall thickness From 6 mm to 150 mm
Maximum length 14900 mm
Bending radius
Minimum 100 mm
Maximum 10500 mm
Bending angle
Maximum 182° (Degree)

 

Heat induction bending radius chart

Gauge Inner Radius in Inches Minimum Closeness of Cutout to Bend in Inches
11 gauge (0.120 and 30.05mm) 0.07
0.08
0.09
0.1
0.125
0.5
14 gauge (0.075 and 10.9 mm) 0.05
0.055
0.062
0.07
0.075
0.275
0.07
0.105
0.375
0.09
0.11
0.115
0.12
0.5
10.375 0.4
16 gauge (0.060 | 10.52 mm) 0.035
0.05
0.2
0.05
0.055
0.075
0.08
0.265
0.375 0.07
0.105
0.12
0.5
18 gauge (0.048 | 10.22 mm) 0.04
0.045
0.05
0.2
0.06
0.07
0.08
0.085
0.265
0.1
0.125
0.375
0.115
0.12
0.5
20 gauge (0.035 | 00.89 mm) 0.05 0.2
0.06
0.07
0.265
0.095 0.375
22 gauge (0.029 | 00.74 mm) 0.05 0.2
0.04
0.08
0.265
24 gauge (0.024 | 00.61 mm) 0.04 0.2
0.08 0.265

 

Hot bend standard

Standard Of Hot Bend
ISO 15590 : Hot induction bends (Natural gas and petroleum industries)
AS 2885 : Liquid and gas petroleum
DNV-OS-F101 : Sub-marine pipeline systems
ASME B31.1 : Power piping
ASME B31.3 : Process piping
ASME B31.4 : Pipeline transportation for slurries and liquids Systems
ASME B16.49 : Factory-made, wrought steel, butt welding
AS 4041 : Pressure piping

 

Induction bend pipe length calculation

  • Length of ARC = number Of deg x 0.175 x radius of hot bend

Induction bend pipe length calculation

Length of pipe in standard hot pipe bends
If angle in deg is Multiply radius If angle in deg is Multiply radius
22 1/2 0.393 150 2.618
30 0.524 180 3.142
45 0.785 210 3.665
60 1.047 1.047 4.189
90 1.571 270 270
112 1/2 1.963 300 5.236
120 2.094 360 6.283
135 2.356 540 9.425

 

Hot bend pipeline specification

  • Material : Low alloy & carbon steel
  • API 5L, ASTM A106, ASTM A335, ASTM A333, ASTM A312
Size in inch Outside Diameter : 2″ to 60″
Tolerance -1 ~+2 mm
Radius of induction bends R^3D
Wall Thickness 3 to 60 mm
Wall thickness thinning: R=3D <13%
Radius =4D <11%
Radius =5D <9%
Radius =6D <8%
Angle of hot bends : 0~180 degree ±0.5 degree
Velocity of hot bend pipeline ±2.5mm per minimum
Temperature of hot pipe bending ±10°C from the qualification temperature
Ovality <2.5%
Tangent ovality of ANSI B16.9 buttweld hot induction bends <0.8%
Inside Diameter welding ends NPS<36 inch ±2.5mm
Inside Diameter welding ends NPS>36 inch ±3 mm
Radius = R D = Diameter

 

Induction hot pipe bending process

  • hot induction pipe bending are normally manufacturing in 45 Deg/ 90 deg/ 180° angles
  • The bend radius for ansi b16.9 buttweld hot induction bends is specified as a function of the diameter (D) like 1.5D, 2.5D, 3D, 5D, 30D, 60D bends

Induction hot pipe bending process

Important parameters that affect the induction hot pipe bending process

  • Pipe diameter
  • Surface contamination
  • Process parameters (temperature/ cooling rate/ speed)
  • Radius Of bend
  • Angle of bend
  • Process interruptions
  • Pipe material hardenability

Manufacturing range of heat induction pipe bending

Particulars Manufacturing Range
Diameter of pipe 4″ to 24″
Thickness of pipe Up to 30 mm
Radius of induction bending 2D – 22D ( Max. R =4877 mm)
Angle of heat induction 0° – 90° (degree)
Tolerance of angle ± 0.5°
Tolerance of radius ≤ 5 mm
Ovality at ends ± 1%
Ovality on body 4D & above to 6%
Wall thinning 4D & above ≤ 8%

EIL approved large diameter pipe bending for pipeline transportation systems, carbon steel hot induction bend without pipe warping and wrinkling, check tight/ long radii bends price list in Dubai

Cold induction is a process that does not involve heating pipes and is used to make simple machines. In fact, it is limited to smaller tubes. And though it is not a very expensive process, the physical force required to bend a pipe is higher than hot induction. There are several benefits to hot induction. Firstly, it uses heat and so, it forms complex equipment in an efficient manner. The force required is relatively low. One has a higher control over this process, which usually means there is no wrinkling on the surface of the pipe.

The process starts with pre-inspecting a pipe that must be bent. After it is inspected, the pipe is hydraulically clamped to a machine bed. The tube to be processed is surrounded by heating and cooling coils. Uniformity in the heating process is achieved by adjusting the coil into a 3-plane movement. The bent radius is fixed by making adjustments in the radius arm and the front clamp. The system includes a pointer which displays the appropriate degree of turning. Another pre-requisite to the process is arc length markings on the pipe. The force required for bending is applied with the help of a fixed radius arm, as the tube moves slowly. The process begins once everything is set including the water level, hydraulic pressure and switch inspection. When the coils reach a specific temperature range, the pipe is forced forward at a pace between 10 to 40 mm/min. Once the desired outcome is achieved, i.e. the marked arc length is complete, the process is stopped. Since the coil heats the pipe, it needs to be quenched. Quenching takes place with the help of a water spray on the surface of the tube. The spray is located just beyond the induction coil.

ASTM A234 grade wpb hotbend and MSS SP-75 WHPY heat induction bending are available in long/ short radius 45°/ 90°/ 180° angles as per ASME B16.49

A strip of metal is passed through a set of rollers that are arranged in a successive manner. It is a continuous process where the rollers bend the metal strip in small increments such that they achieve the desired bend cross-sectionally. Ideally, this process is suited to metals that do not contain significant content of ferrous. If a pipe is to have a larger radius bend, a cold rolled material is preferred.

Large diameter pipe bending with tangent ends available in API 5L gr X42/ X52/ X60/ X65/ X70, check pipeline bend radius, specification and hot bending process

An induction machine consists of a steel profile to be fixed at its ends. A good bending radius is set on one end of the machine, whereas the other end moves at a constant, slow pace. To heat the steel profile, the machine accommodates an electromagnetic induction coil. The pipe is bent with the help of a precision screw, and the cooling medium is shaped at the desired bent angle. The medium is kept cool continuously to get achieve the desired shape.

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