How is the economic flow velocity for gas pipelines determined?
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:'(Are there any regulations or standards available regarding the optimal flow rate for gas pipelines? Thank you)~
It can’t be found. The economic flow velocity for long-distance pipelines is 3–7 m/s, as stated by the experienced experts at CNPC’s design company ； The flow velocity range for overhead pipes within the plant is 15~30 m/s; this value is taken from DL/T 5174-2003 \"Design Specifications for Gas-steam Combined Cycle Power Plants\"
Same question: I’d like to know what the optimal flow velocities for pipes are under different pressures. All the information I have are empirical values; generally, for medium-pressure pipes, the value ranges from 8 to 12 m/s
I checked it when working on my graduation project; I remember that the manual mentioned it somewhere. I’ll look for it again later. But it’s all just experience; there’s no theoretical basis for it.
It seems that there are instructions in 50028-2006; you might want to take a look
For long-distance pipelines, the flow velocity is not specified; for pipelines within stations operating at pressures of less than 2 kilograms per square meter, the flow velocity ranges from 10 to 15 meters per second, while for those with higher pressures, it can range from 15 to 30 meters per second. However, in the design process, the flow velocity in natural gas processing stations is generally kept between 8 and 12 meters per second
The frictional loss along the flow path is proportional to the square of the flow velocity; pipe resistance must be taken into account! !
I would like to know that too, but after reviewing many specifications, it only states that the pressure drop in long-distance pipelines should not be too high; regarding gas transmission stations, that is, the economic flow velocity for the pipelines within such stations, no clear specifications are given. The pipeline transportation specifications only specify the requirements for oil pipelines
There are recommended experience values in the petroleum surface engineering design manual that can be used.
The economic flow rate for gathering and transportation systems is specified in the petroleum surface engineering design manual: it is 4–6 for gas production pipelines, and 15–20 for gas gathering pipelines
As a supplementary point, in gas field gathering and transportation systems, the flow velocity of natural gas before dehydration is generally maintained between 2 and 6 m/s. This is to ensure that the gas retains its ability to carry liquid, while preventing the high flow velocity from causing erosion that could damage the layer formed on the inner wall of the pipes or the corrosion-inhibiting coating, thus avoiding increased localized corrosion. As for the economic flow rate, should it be as high as possible provided that pipeline safety is ensured?