Piping cautions for high velocity seawater 2

[AoA]

Hi,

I am going to start piping for a project for which I found following details in process calculation sheet:

seawater intake; pipe size 24"; velocity inside pipe is more than 25 meters per second.
temperature is 30 Celsius. material is going to be super duplex or some other exotic expensive material.

Above is the maximum pipe size so if I know answers for this I would be able to manage others.

Please tell me if because of high velocity I have to apply special techniques in piping or if certain pipe routing practices are to be avoided.
And NPS 24 pipe routing is new to me. What are things to consider.

Your experience and knowledge would be beneficial.

Thanks.

 

[TD2K]

< It may take some time for the error to be uncovered since the OP seems to log in every 7 months or so on average. >

That's a bad sign. By the next time they log in, they could already have this pipe on order

 

[MortenA]

It seems likely to be a unit error (or a decimal place error) so 25 ft/sec or 2.5 m/sec would be more appropriate. But we may be wasting our time here.

 

[DRWeig]

25 m/s would also be pretty tough on the local marine life at the bar screens...

Best to you,

Goober Dave

Haven't see the forum policies? Do so now: Forum Policies

 

[rconner]

As there has been a mention of "pumping out" I'll go ahead and mention if this intake happened to be supplying water to a similarly sized pipe suction nozzle there could also be repercussions in the area of pumping performance and reliability (as some others have perhaps already at least inferred).
I read just a few years ago in an article in "WaterWorld" by Mr. Allan Budris the statement, "Furthermore, the suction piping should be at least as large as the pump suction nozzle and be sized to ensure that the maximum liquid velocity at any point in the inlet piping does not exceed 8 ft/sec." [This in case the OP comes back and this wasn't just a "hit-and-run poster", or scared off by now!]
All have a good weekend!

 

[BigInch]

24 m3/s ( 86,400 m3/h) (12.5 MMBPD) needed for Iraq oil fields

But not from a 24" pipeline I hope.

 

[AoA]

Dear All,

It came out that velocity shall be much lower as mentioned by many people in this forum. It will be 3.5 m/s

RTR pipe material will be used and pipe size will also be very large.

Thanks everybody.

 

[Gator]

Aw crap, now we have to worry about sea level rise again.

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