Steel Pipe Maximum Bending Moment
Steel Pipe Maximum Bending Moment
(OP)
I am sorry for asking such a fundamental question. I have forgotten Strength of Material Basics that I studied in 1st Yr. I just want to know what is the formula for maximum bending moment for a steel pipe?
Many Thanks.
Many Thanks.





RE: Steel Pipe Maximum Bending Moment
RE: Steel Pipe Maximum Bending Moment
RE: Steel Pipe Maximum Bending Moment
Your pipeline and riser will have loading from self weight, environmental from wave action, pressure, temperature, displacements from free spans or jacket movement. You may need to consider secondary effects such as vortex shedding, VIV, pipeline walking.
Ideally your first staring point should be the basis of design.
RE: Steel Pipe Maximum Bending Moment
RE: Steel Pipe Maximum Bending Moment
Your pipe will have a limiting moment capacity but that doesn't help you if you dont know the moment it needs to resist. For example, if you calculate your pipe has an allowable moment capacity of 50kNm by limiting the maximum bending stress to 0.85 x yield stress that doesnt really help unless you know it needs to resist 400kNm.
Without that how can you tell whether it is strong enough?
RE: Steel Pipe Maximum Bending Moment
From yielding stress, how can I get limiting moment capacity (even though it may not be too useful)
In the refernce document that I am mentioning, they have arrived at the value of Max Bending bending of arnd 50kNm for 6" pipeline (Grade X-52;SMYS=359Mpa) by taking it 0.85 X Yield Stress.
RE: Steel Pipe Maximum Bending Moment
elastic section modulus of pipe = I/y
I = pi(d4 - (d - 2t)4) / 64 , the two 4's are to the power of 4
y = d/2
RE: Steel Pipe Maximum Bending Moment
RE: Steel Pipe Maximum Bending Moment
RE: Steel Pipe Maximum Bending Moment