Elastic Bend (Pipeline Natural Bend)

Related Topics

Pipeline bent elastically during laying. Bend radius may be R>1000*DN. Unlike an ordinary large radius bend, an elastic bend has initial bending stresses caused by pipeline bending during laying process. Central bend angle should not exceed 90 degrees (more...).

Difference Between the Long-radius Bend and Prestressed Long Radius Bend

The difference between a large radius bend and a elastic bend is that a large radius bend keeps its bent shape without any external forces (fig. 1.a). An elastic bend is a straight pipe element (fig. 1.b) bent forcibly during laying (fig. 1.c). If external forces are removed, an elastic bend becomes a straight pipe (fig. 1.d).

 

Fig. 1. Difference between large radius bend and elastic bend

The additional longitudinal stability analysis is done for this element. When these elements are used in Start-Base, an automatic stability check is performed, and in the event of insufficient stability an error message is displayed in the "errors and warnings" window. In addition, stability can be checked using Start-Elements "bend stability".

Properties

 

Property

Description

Radius, R

Bend radius (R>10D)

Curve length, L

Bend length

Tangent, T

Tangent of the bend

Get properties from matching pipe

Get properties from matching pipe

Material

Element material from the materials database

Nominal wall thickness, S

Nominal (actual) wall thickness

Mill tolerance

Mill tolerance at the time of production. More...

Corrosion allowance

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

Calculate weight automatically

Pipe weight is calculated automatically using:

Material density is taken from the materials database

Linear weight of pipe

see elements description

Linear weight of insulation

see elements description

Linear weight of product

see elements description

Toolbar Access

To insert an element, select the desired node and use: Insert > Insert bend > Elastic Bend

To view properties of an existing element: