Induction Bend

Bend produced using induction bending technology that applies a bending force to a material that has been locally heated-up. Also the cold bending method can be used. There's no difference in stress analysis of Forged elbow, Induction bend and Welding elbow in ASME and EN codes.

Central bend angle should not exceed 90 degrees (More...).

Start-Prof perform the Wall thickness check for Pipe bend according to selected code. For ASME code:






Element name. If checked then it shown in 3D view


If you push this button, you will see h, SIF, k-factors for the bend

Radius, R

Bend average radius  (0.5D<R<10D). Long - 1.5DN, short - 1.0DN

Get properties from matching pipe

Get properties from matching pipe

Calculate weight automatically

If selected, bend weight is calculated automatically as torus sector volume with wall thickness equal to that of adjoining pipes


Bend weight (with flanges) without insulation and product. Set according to standards without taking into account the overload factor. Product and insulation weight with corresponding overload factors are calculated automatically based on adjoining pipes

Longitudinal Weld Joint Efficiency Factor, E

Longitudinal weld joint efficiency factor, E. More...

Manufacturing technology

For ASME B31.1, ASME B31.3, DL/T 5366-2014 seamless pipe will always use Wl=1.0. For electric-welded pipe Wl will be specified from database. More...

When using  GOST 32388-2013, pipe physical properties are taken from different materials databases depending on pipe type (seamless/welded).

Calculate angle automatically

The bend angle used in bend's flexibility factor (k-factor) calculation in some codes. The option "сalculate angle automatically" should be turned on by default.

It is recommended to turn off this option when the bend was splitted into several parts to model the support on bend. In this case the angle should be specified for full bend, not for each part of bend



Material from materials database

Nominal wall thickness, S

Nominal (actual) wall thickness

Mill tolerance, С1

Mill tolerance at the time of production. More...
When analyzing based on  RD 10-249-98 (section, 3 mill tolerance values must be input (С1=С11+С12): external, neutral and internal bend section, with a difference equal to the value of С12 (to determine С12 see section More...

Corrosion and wear allowance, С2

Corrosion and wear allowance (working mill tolerance) for wall thickness. More...

Do not check internal bend wall thickness

According to RD 10-249-98 section "for extruded elbows manufactured in a closed press, or for bends manufactured on machinery with high-frequency currents and axial preload, c12 к sR1  allowance must be from 0.05s to 0.1s. c12 к sR3 allowance is 0, and internal bend analysis is not performed.
For extruded elbows with the perpendicular weld along the middle of the elbow length,  c12 к sR3 allowance is 0, while c12 к sR1 allowance must be from from 0.05s to 0.1s; in this case, internal elbow analysis is not performed, because this side of the elbow has a higher wall thickening than the K2 factor."

Ovalization factor a, %

Initial ovalization factor. More...

Toolbar Access

To insert a bend, select the desired node and use the menu option: Insert > Insert Bend > Induction Bend

To view properties of an existing element: