Hi all,Could you tell me how I can calculate the overpressure in 2" pipe API 5L X52 which cause blown up of the pipe by 50%.

Re: how I can calculate the overpressure Woodcousa.com has the technical information on API 5L X52 pipe The materials properties are listed on http://www.woodcousa.com/line_pipe_properties.htm The dimensional properties of the pipe are listed on http://www.woodcousa.com/pipe_schedule.htm The hoop stresses in the pipe are given by the equation s = pr/2t p = internal pressure r= inside radius of pipe t = wall thickness of pipe The theoretical 150 percent burst pressure can then be calculated with s =150 percent of ultimate tensile strength p = 2st/r

Re: how I can calculate the overpressure there are two type of stress are produce in pipe due to over pressure in it, (1) hoop stress (2) longitudional stress hoop stress(6h)=(pd/2t), from above eqn. we find internal pressure p=[(6h)*(2t)*]/[d] where p=pressure inside the pipe(n/mm^2), t=thick.of pipe(mm) d=inside dia of pipe(mm), longitudional stress(6h)=(pd/4t), from above eqn. we find internal pressure p=[(6h)*(4t)*]/[d] where p=pressure inside the pipe(n/mm^2), t=thick.of pipe(mm) d=inside dia of pipe(mm), but for safe design you go with longitudional stress and as per my thought it is safe design comperativaly hoop stress,