underground pipelne 3

[engfir]

i have sveral pipelines that must pass underground of the highway
the pipelines are for different product with different diameters
1_ steam pipeline
2- saturated water
3- jet
4- fire fighting pipeline
5- oil pipeline
i don't know how to calculate safe distance between these pipelines so please if you could help me or tell me the standard

 

[pennpiper]

Without you telling us which country these pipelines are in, it is sort of hard to offer real concise guidelines.
So. I will offer the "Ditch Diggers Rule" place the pipes a minimum of one shovel distance apart (out side to out side of pipe).

There, how does that sound?

 

[engfir]

i am in egypt

 

[engfir]

is there is asafe distance between two parallel pipeline
is it differant between above ground and above ground pipeline

 

[BigInch]

The "safe distance" depends on how you intend to cross the road. You might like to, for example, not bury any of them and run all of them through one large box culvert, or several box culverts, or place them each in their own box culvert.

You might want to bury them under the road, in which case they might be several meters apart, or some companies require anywhere from 5 to 15 meters separation.

The safe distance might refer to how far apart they should be in order to not interfere with the adjacent lines, should one have to be excavated and repaired. That might depend on what equipment you would need to do that, on thier diameters, wall thicknesses, weight, how deeply they were buried, how heavy and how large an excavator, and how large a hole you would need to dig to access them.

From "BigInch's Extremely simple theory of everything."

 

[engfir]

it will be in culvert
i know thickness and weight and diameter but i need equation that calculate safe distance in culvert

 

[BigInch]

Surely you're joking.

From "BigInch's Extremely simple theory of everything."

 

[engfir]

I am sorry but i don't know if there is a standard for pipeline in culvert which define distance
These is my first time to construct pipeline in culvert
i need to define the distance between pipeline but i don't how cause i don't have arefrence to read

 

[engfir]

i found the standard for buried pipelines not culvert
only i wonder what is refrence for pipeline in culvert

 

[ADS2K6]

pipelines in culvert, should have minimum spacing of average of their diameters.

 

[engfir]

thank you could you tell me what is the refrence u used so i could use it in any future question

 

[engfir]

cause i want to calculate the width of culvert

 

[pennpiper]

engfir
You wrote"
"I found the standard for buried pipelines not culvert, only i wonder what is reference for pipeline in culvert."

If you really think about it I'm sure you will realize that it makes sense to carry the same line spacing through the culvert as you have on both sides of the culvert.

If you want a different spacing just for pipes inside the culvert then you are adding extra cost to change the spacing on one side of the culvert and then again to change it back on the other side.

You should find out what the worst case spacing is then use that throughout.

 

[engfir]

all what you say is right but i want the standard of culvert to read it

 

[cvg]

I doubt very much that you will find a "standard". you need to make an engineering decision, based on analysis of risk, O&M and constructability.

 

[BigInch]

There's no public standard, or private standard that I've ever seen that mentions this. I would, at a minimum, only consider one dimeter of the largest pipe in any adjacent 2. Maybe greater, if they were hot, restrained at each end, and the culvert was long. I might also install some mechanical spacers, if it looked like snaking was possible, or leave in enough room between to accomodate the maximum predicted lateral movement plus one diameter.

From "BigInch's Extremely simple theory of everything."

 

[MortenA]

engfir - maybe you should consider bringing in a consultant or an engineering company?

Best regards

Morten

 

[stanier]

engfir,

Has the company that owns the hydrocarbons standards? Shell, BP or other?

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

 

[stanier]

Generally such pipelines are installed in a culvert so you overcome the soil corrosion aspects. Direct burying brings risks of failure, closure of the highway, environmental spills, ongoing monitoring. If os spacing should be same as any aboveground piping.

If you must direct bury then thee should some distance between the pipes to ensure that the soil compaction is adequate for the highways loadings.

AWWA has standards that cover buried pipelines for water. Structurally no different for hydrocarbons.

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

 

[engfir]

could you tell me the distance in the above ground pipeline