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Maximum velocity natural gas pipeline tap

Maximum velocity natural gas pipeline tap

Maximum velocity natural gas pipeline tap

(OP)
What is the maximum velocity that should be used to determine the diameter of a tap on a natural gas pipeline. We use 60 ft/sec as maximum velocity for the pipeline itself, Is there a diffrentet condition for the tap itself?

Thank you

RE: Maximum velocity natural gas pipeline tap

i would say that for dry natural gas is mostly about noise and dP (erosion should not be an issue). So in reality its very site dependent - although most companies have a "mas value" this could be wavered if e.g. noise and/or is not a problem.

RE: Maximum velocity natural gas pipeline tap

At that velocity you may need to look at vibration and associated issues.

If you can then its better to have a larger tee and then reduce down for the valve and main run.

Its stronger and you have less velocity related issues.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Maximum velocity natural gas pipeline tap

OK, i didnt mention vibrations, and i agree with Littleinch

RE: Maximum velocity natural gas pipeline tap

(OP)
Thank you for your response, I have found very valuable information in this site and it is the first time I ask for advice
My case is as following
I have an existing 2" tap where the gas consumption will increase in the near future
Minimum main pipeline operating pressure: 476 psig
Excepted Natural Gas pick consumption: 395 MCFH
Tap diameter: 1.437"
Pipe diameter after de tap 2” Sch 80
Length of the pipe: 18 meters
Velocity: 293 ft/sec (doesn't consider compressibility factor)
After the 18 meters the pipe changes to 3”

What methods can I use to predict the pressure drop through the tap itself? (I haver the one for the 2" pipe already)
How can I predict noise and vibration and evaluate if it can harm the pipeline?

Because of excessive regulation, my firm wants to avoid the change, I believe this can be a problem but I have no evidence to show. The transmission company hasn’t said anything about it.
Any additional information will be appreciated






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