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Pipe Stresses Perpendicular To The Longitudinal Axis

The internal or external pressures on the pipe walls cause the stresses acting perpendicular to the longitudinal axis of a pipe. Internal pressure creates a stress commonly called hoop tension

The sum of the forces in the horizontal direction is


p= internal pressure, lb/in2 (MPa)

D= outside diameter of pipe, in (mm)

F= force acting on each cut of edge of pipe, lb (N)


Hence, the stress, lb/in2 (MPa) on the pipe material is

pD=F/A= pD/2t

A= area of cut edge of pipe, ft2 (m2)
t= thickness of pipe wall, in (mm).

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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One comment on "Pipe Stresses Perpendicular To The Longitudinal Axis"

azfar chaghtai says:

respected concern… actually i am trying to find out the iron pipe holding capacity ..for example , if i place two 2″ iron pipes ( height 12 feet) horizontally and then fix one 2” square pipe ( length 26 feet) vertically so how I can find the supporting point where I must hold the triangle supporting ?
(on horizontal pipe 3 feet down from up side and 07 feet on vertical pipe)

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