So you're saying a significant component of the longitudinal; stress is due to friction loss between the flowing medium and the pipe wall -- do you have a reference for this?
The formula I see for longitudinal strain in a buried pipeline has 3 terms:
longitudinal strain=strain due to...
The longitudinal strain of a pipeline due to internal pressure only is given by:
longitudinal strain = longitudinal stress/young’s modulus poisson’s ratio*(hoop stress/young’s modulus)
where
longitudinal stress = outer radius *pressure/(2*wall thickness)
hoop stress = internal...
Hi,
I have a question:
When calculating the hoop (cylinder) stress in a pipe you use static equilibrium and equate the stress in the wall to the gauge pressure:
2*T*S*1 where S is the hoop stress, T is the wall thickness, 1 is the unit length and then equate it to the gauge pressure times the...
Yes, it is Carson's paper.Sorry for the wrong link. The correct one was supplied by 7anoter4.
http://www.alcatel-lucent.com/bstj/vol05-1926/articles/bstj5-4-539.pdf
Three best references, all available online. read them in the order posted.
Induced currents in gas pipelines due to nearby power lines
Dejan Markovic University of Wollongong
Actual stage of research regarding the AC interferences on common corridors
PREDICTION METHOD FOR BURIED PIPELINE...
Hi, there's a well known paper called "wave propagation in overhead wires with ground return" you can get it at the link below.
I'm trying to understand this paper, but on the second page I'm not clear where equation 1 is from. Can someone point me to a book (name and pg numbers please) or...
corrosion isn't the only concern. the potential between the pipe and ground can be high enough to cause health hazards if there is exposed metal or damage the coating during a fault.
But if the pipe is coated with a dielectric coating, it's not at ground potential, so I don;t understand why below ground pipes don't suffer from capacitive effects -- there will still be a capacitance between the pipe and the ground since they are at different potentials.
or wait, I think I see where I misunderstood. 60 Hz is too low to produce any EM waves, so we are really only doing with "electrostatic" influences for that reason -- even though the E field changes?
Hi,
I've been reading papers about the influence of high voltage overhead AC power lines on steel pipelines that run parallel to the power lines in the same right of way (that is near the power lines). The pipelines are coated in a dielectric coating to prevent corrosion and can be above...
Hi,
I have the opportunity to work for a small consulting company that does HV substation and transmission line design to connect industrial customers to the grid. However I would like to end up working in the oil sands industry (higher pay) where as far as i know most of the electrical work is...
Oh, I should say that one of the reasons that I am attracted to this opportunity vs a more niche subject is that there is more of a market for engineers with experience doing this type of work, and the demand is probably more widespread than demand for something like pipeline hydraulics.
On...
Hi,
I have a career decision to make. I have an option to work for a twenty something employee electrical engineering outfit that's not in a major engineering city (but is in a very nice city), and whose specialty is doing high voltage (up to 287 kv) transmission line design and substation...
