Search found 371 matches

by admin
Mon Oct 12, 2015 7:34 pm
Forum: Flow calculators and fluid flow problems
Topic: Three most wanted calculators redesigned on pipeflowcalculations.net
Replies: 0
Views: 7409

Three most wanted calculators redesigned on pipeflowcalculations.net

Top three calculators are now available as web application, meaning that on user side, nothing is required else but modern web browser, Internet connection and decent PC or mobile device. Pressure drop calculator, pipe diameter calculator, orifice flow calculator are now available on pipeflowcalcula...
by admin
Mon May 11, 2015 10:59 pm
Forum: Flow calculators and fluid flow problems
Topic: passive pressure compensation: time to equalise
Replies: 4
Views: 6977

Re: passive pressure compensation: time to equalise

I think so. Yet, as I said I haven't got back confirmation of the derivation that you used also, but all calculation results are very close to the conclusion that you made. 1.35 m is about 13.5 kPa, so as you have +/- 50 kPa that should be with solid reserve, which I think is ok and should be accept...
by admin
Sun May 10, 2015 12:12 pm
Forum: Flow calculators and fluid flow problems
Topic: passive pressure compensation: time to equalise
Replies: 4
Views: 6977

Re: passive pressure compensation: time to equalise

Hello and thanks for nice words about web site, as indeed it will be up for long time, I can guarantee that. Is the bladder connected to vessel all of the time? You are right that flow is not at constant rate and flow rate will be changing during pressure change. With discharge calculator, you can c...
by admin
Sun Nov 16, 2014 9:34 am
Forum: Flow calculators and fluid flow problems
Topic: Pressure at Pump Suction in Closed System
Replies: 3
Views: 63600

Re: Pressure at Pump Suction in Closed System

Even if the system is closed and for example you have 50 m height difference, pressure on the lowest point will have at least that 50 m water pressure.
by admin
Wed Nov 12, 2014 10:07 pm
Forum: Flow calculators and fluid flow problems
Topic: Pressure at Pump Suction in Closed System
Replies: 3
Views: 63600

Re: Pressure at Pump Suction in Closed System

You might have that pressure due to hydrostatic pressure. What is elevation difference off the system?
by admin
Wed Nov 05, 2014 11:24 pm
Forum: Flow calculators and fluid flow problems
Topic: Steam flow calculation from tank
Replies: 1
Views: 6166

Re: Steam flow calculation from tank

Without knowing the K of valve you can't tell the flow rate even using gas discharge calculator. If you fully open valve you can use K for it from manufacturers datasheet.
by admin
Thu Jul 31, 2014 7:54 am
Forum: Flow calculators and fluid flow problems
Topic: Rate of flow for an open pipe under pressure
Replies: 3
Views: 6143

Re: Rate of flow for an open pipe under pressure

You must know pipe length and position and size of branches if you have any.
by admin
Fri Jun 13, 2014 11:16 pm
Forum: Flow calculators and fluid flow problems
Topic: Error in Sudden and Gradual Contraction K Factor?
Replies: 1
Views: 4419

Re: Error in Sudden and Gradual Contraction K Factor?

Well spotted, thank you for correction!
I have just made change in calculator and theory page itself.
by admin
Wed Jun 11, 2014 10:37 pm
Forum: Flow calculators and fluid flow problems
Topic: How to calculate vertical pipe flow
Replies: 1
Views: 4361

Re: How to calculate vertical pipe flow

You can use height difference as available head in calculator, ie p1 = rho * g * h + 101325 Pa, p2 = 101325 Pa.
by admin
Sat May 03, 2014 12:41 am
Forum: Flow calculators and fluid flow problems
Topic: Roughness...
Replies: 2
Views: 6221

Re: Roughness...

Roghness really depends on the level of surface treatment for new pipes and corrosion level for old ones. It can be anything up to 1 mm depending on the pipe itself.