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If you only want to know the required flow rate, beyond which the limiting motor may trip, then the flow may be estimated as follows Flow gpm = Motor Power (HP) x 0.95 x 3960 x Pump Efficiency (decimal)/(specific gravity x heat in feet) Use another factor of safety of 0.95 for motor overload...

Scenario A. Pipeline pressure will not be impacted because the piping system is designed for shut off pressure. Highest pressure in the system would be at pump discharge flange and at the back end, it would be pump discharge pressure minus the pressure equivalent of 15 meter head in the non...

There are three methods used to ensure minimum flow protection in a centrifugal pump 1. Fixed are Restriction Orifice (RO) 2. Direct Acting Pressure Control Loop 2. Reverse Acting Flow Control Loop 1. Fixed Area RO This is suitable for centrifugal pumps with relatively low flow and low...

Condensate is directly taken to the flash vessel as you were told by katmar. Once the condensate enters the flash vessel, a portion of condensate (depending on the pressure differential between steam main and the flash vessel) is vented. One possible use may be, diverting this flashed steam...

Hello Srini66 It is one of the recommendations generally used in sizing and selection of control valves that selected valve should not be less than half of the line size. It is not a sizing fundamental however. Control valve sizing of a control valve is a different matter altogether. Here is...

Further to my previous post, ASME PTC 4 is the code for determination of boiler efficiency and according to my memory, it covers both, direct and indirect methods of efficiency calculations. Generalized indirect equation for boiler efficiency is Boiler Efficiency = (1 - Stack Losses - Other...

Firing rate is a function of Boiler Load or in other words, Steam Load demand governs the load of the boiler and fuel firing. If you see the typical (almost the same for all the boiler brands)firing rate logic on the boiler instrumentation line diagram, the signal for firing command is initiated...

Venting into atmosphere is always noisy due to the pressure differential. Install a suitable silencer at the vent. Either you can directly purchase it from a vendor or built it in house. Simple design, employing retardation of velocity by increasing the cross sectional area. Internal design may...

No, it may be correct partially. Valve size can be different from the size of the pipe, it is installed in. According to the best practices, minimum size of a valve can be half of the pipe size, it means, a 6" valve can be installed in a line of size upto 12 inches, if the sizing parameters...

Referring the pump curve is the best way to find out maximum diameter of the impeller that can be fitted in the casing, as already said by Artisi and LittleInch. Normally pump curved provided with the pump are plotted by the vendors for more than one impellers. If you see only a single curve...

Hope you will find your answer in the attached articlehttp://files.engineering.com/getfile.aspx?folder=22187996-04e4-4993-88fc-6d6c49f3e20a&file=feb11_DL.pdf

If you refer to the document "Standard Pneumatic Test Procedure Requirement for Piping System AB 522" by ABSA, the equation to calculate the stored energy is given as follows. The code specifies a limit of 1677 kJ for safety reasons. The stored energy may be calculated using the following...

A picture is better than 1000 words, as the saying is. Is it possible for you to share the circuit, you are talking about?

Pressure drop across a relief valve is not "calculated" separately. If you refer to the sizing equations given in API RP 520 Part I, the orifice size is calculated using the relieving rate (flow rate through the relief valve), inlet pressure (set pressure) and back pressure (barometric pressure...

Yes agreed with Pennpiper. Selection of the gasket is related to piping, not the orifice. If you are sizing an orifice flow meter, please follow your site piping standard for gasket selection.

Important criteria for selection of material are, 1. Service. Type of fluid and its compatibility with the piping material 2. Operating Conditions (normal, maximum and design) like pressure, temperature and composition 3. External Environment Appendix C of ASME B 31.3 provides general...

Simultaneous failure of two pumps and three check valves is a scenario, having extremely remote probability to occur. It should not be more than level III or IV risk category when you plot on Severity-Likelihood graph. The scenario may carry a high severity but its extremely low likelihood...

TD2K is right. I also found Nalco Handbook, quite useful at various occasions. In addition to that, I often refer two other excellent reference handbooks on the subject. Betz Handbook of Industrial Water Conditioning, 9 e,1991, ISBN 0-913641-00-6 and Handbook of Industrial Water Treatment by...

wow i manager to download today wonderful. how many more stars for u Mr Quark. Aliansari

Hi, I am a late comer here. Probably the link is not functional Can anybody help me please. Ali Ansari