Pipeline external pressure
Pipeline external pressure
(OP)
Hi everyone,
I m a new pipeline engineer, I have to design a offshore gas pipeline. I have read most of the codes and standards but all I want to know is that how to calculate the external pressure when the pipe is at the sea bottom?
is it the simple formula as P = density.gravity.depth
or its more than that?
I m a new pipeline engineer, I have to design a offshore gas pipeline. I have read most of the codes and standards but all I want to know is that how to calculate the external pressure when the pipe is at the sea bottom?
is it the simple formula as P = density.gravity.depth
or its more than that?





RE: Pipeline external pressure
desertfox
RE: Pipeline external pressure
Yes, density x depth.
Don't be afraid to open a text book and read the first page or two sometimes.
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Pipeline external pressure
I have read and it talks about wave height and tide height so I was confused that it have an effect on pressure on not.
RE: Pipeline external pressure
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Pipeline external pressure
RE: Pipeline external pressure
RE: Pipeline external pressure
The formula is the following :
P=(Roxgxh)+Pa
with :
Ro=density of sea water
g=gravity
H=depth
Pa=Athmospheric pressure.
Exemple : At 300m of depth, the water density is about 1026kg/m3, also the external pressure is :
P=((1026*9.81*300)/100000)+1
P=31.195 bar, with P=relative pressure applied onto the pipe on the bottom of the sea.
Eric