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Pipe thread strength calculation
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Posted by: CostasV

02/03/2010, 07:36:05

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I want to calculate what is the maximum axial force (to yield point) between two steel pipes (with relative large diameter, for example 4") that are connected with pipe thread with a pipe coupling. And to compare the results for the BSPP thread and the NPT.

No need for tightness or pressure sealing.

Could you help?








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: Pipe thread strength calculation
: Pipe thread strength calculation -- CostasV Post Reply Top of thread Engineering Forum
Posted by: Kelly Bramble

02/03/2010, 19:15:58

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First, you need to determine the thread stress areas of the threades of interest. Then the number threads and total amount of thread stress area.

The rest is simply force/area.

See http://www.engineersedge.com/mechanics_material_menu.shtml








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: : Pipe thread strength calculation
: : Pipe thread strength calculation -- Kelly Bramble Post Reply Top of thread Engineering Forum
Posted by: CostasV

02/04/2010, 03:03:06

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Thank you for your answer.
You mean to calculate as if it was a screw thread?
Is there not any special consideration for pipe thread (for example, the quality of the thread or the ovality of the pipe)?

Well, I guess I could consider such parameters.

Another question: Is there any concentration factor for the stress on the root of the pipe thread?








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