High Pressure Pipe Buckling Support Spacing 1

[RiserGuy]

I need to figure out the support spacing for a pin and box pipe connection where the pipe box is supportted vertically from one end (the box end) and the pipe pin end stabs into another pipe box. The box has pressure seals. The pin end is free to "float" in the box.

The pipe is 75 feet long.

The pipe is 316L, yeild at 25 ksi. The pipe is 2 3/8" OD and 1 7/8" ID. The pressure in the pipe, 5000 psi and also acts on the pin end, in an upward force.

What is the maximim length between supports that will still prevent buckling?

Thanks - Riser Guy

 

[1969grad]

The longitudal stresses caused by bending are limited by ASME B31.8, etc.

The design criteria may be more related to how much pipe deflection you are willing to accept as opposed to the possibility of buckling.

MSS has a spec that suggest pipe support spacing that most people use for smaller diameters.