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Induction Bends

   The Induction Bending Process

Induction Bending, like many engineering ideas, owes its success to its inherent simplicity & effectiveness. It is a controlled process of bending pipes through the application of induction heating to a localized cross section of pipe, using high frequency induced electrical current. An induction coil is placed around the pipe to be bent. The coil heats a narrow, circumferential zone of pipe to the appropriate bending temperature between 730°C & 1100°C, depending on the pipe material type. When this temperature is reached, the pipe is continuously, gradually moved through the heating ring while a bending moment is applied to the heated area. After bending, the pipe may be either forced or naturally cooled, as required by the applicable qualified bending procedure.



   Why Induction Bends?

• Improved Quality – Induction Bends have

  - Precise dimensional controls & accuracies (radius, angle, ovality, wall thinning)
  - Uniform mechanical properties (uniform hardness) and
  - Better surface finish (no pipe wrinkling & warping, reduced oxidation or de - carbonization due to instantaneous heating, little impurities     or scratches on the inner surface) compared to bends from other techniques.

• Integrity of Pipe Work – Induction Bending reduces the need for welded or mechanical joints, resulting in superior integrity of  the finished    pipework.

• Time Saving – Induction bending does not require any sand filling or insertion of inner mandrels. The bending and product inspection    times are considerably lesser, making the process cost effective.

• Processing Flexibility –

  - A wide range of type, quality, wall thickness & diameter materials can be processed.
  - Multiple & Compound bends can be produced from a single length of straight pipe with minimal amount of distortion.
  - Relatively tight radii & long radii bends can be produced with ease, without having any sectional & metallurgical effects.
  - Since no special tooling is required, precise customized pipe bends can be made flexibly for many application areas.

• Pipe Work Design Optimization – Induction bends enable designing of pipe work systems utilizing optimum bend construction, leading to    long term energy savings in operating the system.

  TPI’s "Inductavantage"

TPI’s induction bending capabilities offer an array of possibilities to precisely bend (single & multiple) a wide range of input pipe materials in carbon, alloy & stainless steels.

TPI’s vastly experienced team of engineers, operators & managers take utmost care to ensure the highest quality of pipe bends consistently, in strict adherence & conformance to the international specifications.

• API – 5L• MSS – SP – 75 • ASME – B – 31.1• ASME – B – 31.3 • ASME – B – 31.4• ANSI – B – 16.9
• ASTM – A – 234• PFI – ES – 24 • ISO – 15590 – 1 • DNV – 2000 • EIL Specifications

TPI’s strong emphasis on using best raw materials & controlling process parameters results in production of mechanically sound & dimensionally accurate bends with high degree of repeatability leading to output yield maximization.

The in – house multiple quality checks & tests guarantee shipments of 100% defects less materials to customers’ sites. Each & every bend is ‘Pig’ tested to avoid any hassles after installation.

TPI also has an in – house hydro testing facility for bends which can be undertaken based on customers’ requirements.

Involve TPI in the early stages of your pipe work design process to minimize costs & achieve overall benefits from our Inductavantage package.

    Bending Capabilities


Pipe Diameter
(Inch)
Bending Radius
(mm)
Wall Thickness
(mm)
Bend Angle
(Degree)
(Min) (Max) (Max)
8 3D 609.6 10D 2030.0 80 1 – 180
10 3D 762.0 10D 2540.0 80 1 – 180
12 3D 914.0 8D 2437.0 60 1 – 180
14 3D 1066.8 7D 2489.0 60 1 – 180
16 3D 1219.0 6D 2438.0 60 1 – 180
18 3D 1371.0 6D 2743.0 50 1 – 180
20 3D 1524.0 5D 2540.0 50 1 – 180
24 3D 1830.0 7D 4270.0 45 1 – 180
26 3D 1981.0 6D 3962.0 45 1 – 180
28 3D 2133.0 6D 4267.0 40 1 – 180
30 3D 2286.0 6D 4572.0 40 1 – 180
32 3D 2438.0 5D 4064.0 40 1 – 180
36 3D 2743.0 5D 4572.0 40 1 – 180
40 3D 3048.0 7D 7112.0 36 1 – 180
42 3D 3200.0 6D 6400.0 30 1 – 180
48 3D 3658.0 6D 7315.0 28 1 – 180