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Associate

Join Date: May 2011
Posts: 38
Good Answers: 1

Capacity of Unloading Pumps

03/29/2017 7:12 AM

Dear All,

In one of our project , customer has requested for 300 m3/hr unloading pumps (150 m3/hr x 2 nos working) but the number of unloading tankers are 10 numbers only( Tanker capacity will be 25 kl max).

I feel that the capacity indicated in very high for 10 numbers of road tanker unloading and suitable for Railway wagon unloading.

Another project have similar capacities and it is wagon unloading.

I suspect Cavitation can be issue if unloading capacity is high and only 2 or 3 tankers are unloaded.

I request every one to provide me some suggestions what are the issues If unloading capacity is high .

Regards,

RR

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Guru

Join Date: Apr 2010
Posts: 5744
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#1

Re: Capacity of Unloading Pumps

03/29/2017 9:38 AM

25 kl is 25 m3, so each pump can fill a tanker in 1/6 hour or 10 minutes. It depends on how much time you want to spend on each tanker. The added capacity might be good if the number of tankers increases in the future.

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#2

Re: Capacity of Unloading Pumps

03/29/2017 12:13 PM
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Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
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#3

Re: Capacity of Unloading Pumps

03/29/2017 1:35 PM

What size is the unloading pipe/hose?

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain, and now disconnecting as Little England and Wales (not too sure about Wales bit, either). Kettle's on.
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#4
In reply to #3

Re: Capacity of Unloading Pumps

03/29/2017 6:11 PM

At those flowrates, it had better be no less than 8" if the fluid in non-flammable and 12" if flammable, just so there's no problems downstream with static electricity.

It sounds as though the Client is talking out of his arse making unrealistic demands.

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Associate

Join Date: May 2011
Posts: 38
Good Answers: 1
#5
In reply to #3

Re: Capacity of Unloading Pumps

03/30/2017 1:02 AM

Hose diameter is 80 DN.

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Guru
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#6
In reply to #5

Re: Capacity of Unloading Pumps

03/30/2017 1:46 AM

That would result in an enormously high velocity. See PW's comment above.

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain, and now disconnecting as Little England and Wales (not too sure about Wales bit, either). Kettle's on.
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#7
In reply to #5

Re: Capacity of Unloading Pumps

03/30/2017 3:44 AM

Absolute nonsense. The Client is definitely talking out of his arse making unrealistic demands.

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Power-User

Join Date: Jul 2016
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#8
In reply to #5

Re: Capacity of Unloading Pumps

03/30/2017 12:04 PM

3.5 bar pressure drop for 100ft of line, off the charts for 80DN pipe

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