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Aircraft fatigue test is very specialized field. You need to consult relevant experts from aerospace design industry. For general reference see Wikipedia. Link "The International Follow-On Structural Fatigue Test Program (IFOSTP) was a joint venture between Australia, Canada and the U.S. to...

If flow rate is nearly steady then 2 pumps will be better. If flow rate can be lower for some time then investigate whether 3 pumps will be better for handling lower flows such that one or 2 pumps can be switched off. The velocity limitations are mostly to prevent excessive erosion for...

You should consider vibration isolation in addition to additional structure. The additional structure should be connected to the roof support structure, instead of thin metal ceiling. Now! Or it may be too late.

In the textbook, we apply the general equations of equilibrium as follows; Here x, y and z are coordinate axes We can go into individual links, but in the overall, the combined structural equilibrium needs to be obtained, otherwise it is a dynamic case, not static. Engineers, think what we...

Your pipe lengths are not legible. So I assume 100 m total equivalent length. Pipe flow=110 m3/h Pipe dia=0.09 m Calculated velocity=4.8 m/s Calculated Re=41700 Calculated friction factor f=0.014 Calculated friction drop(Darcy eqn)=f*L/d*v^2/2g=18.29 mwc Available pump head=3.135 bar=31.96 mwc...

Yes, there is a confusion about the point of rotation. Instead we consider moments about the bottom horizontal line. For static equilibrium, Finputcos(17.90)*17.375 cos(17.90)=Foutput*23.375 Or Foutput/Finput=0.6942 Or Finput/Foutput=1.441 Hope I have applied my college funda correctly...

Assuming this is a static case, there will be equilibrium of torques. So, Torque=17.375Finput=23.375Foutput So the force ratio is Foutput=17.375/23.375Finput=0.7433Finput. But if it is a dynamic case, the inertia forces and moments need to be considered also. Engineers, think what we have...

Very cogent response above. A small update, now-a-days the overpressure protection is guided by ASME Section XIII. Engineers, think what we have done to the environment !https://www.linkedin.com/in/goutam-das-59743b30/

Transverse cracks can also develop due to high stress during welding(and also weld and filler metal quality). Please check whether the pipe experienced stress during welding possibly due to restraints or similar reasons. Engineers, think what we have done to the environment...

Given your description of lines, there is strong possibility that the lines are partially thermally restrained. Isometric of the lines would have been helpful in understanding the problem. In any case I suggest you contact a piping design consultant and get the design reviewed. Engineers...

As the pump performance curve for 48% BEP efficiency pump was not available, it was assumed that since the rated flow is larger, the head will be larger too based on the assumption of similar pump characteristics at this size range. So based on assumption of availability of additional head...

Depending on the locations of the heat exchangers, and the cleanliness of water, a reducer could be considered approximately at the middle of the header. Otherwise, the velocity may be <1 m/s and there may be a possibility of sludge deposition. Engineers, think what we have done to the...

Assuming the pump bypass is always open(as you have shown), the flow will be divided, and the pump P2 head should match the pressure drop across the filter. Pressure at P2 then is greater than P1 by an amount which is the pressure drop across the filter. At connection point P3, the pressure...

Nevertheless you can check with pump supplier of 48% efficiency pump to check whether VFD will suit the purpose. But as the pump head is also lower at a lower speed, you need to check with the system resistance curve also. Engineers, think what we have done to the environment...

Sketch 2 is confusing as pump bypass is shown. If there is no pump bypass then your statement is correct. Please clarify the last question. Is it with or without the pump bypass? Engineers, think what we have done to the environment !https://www.linkedin.com/in/goutam-das-59743b30/

Any information about fluctuating or reversing loads to check for the possibility of fracture? Engineers, think what we have done to the environment !https://www.linkedin.com/in/goutam-das-59743b30/

One way to do this will be to take two plates of the same PV material and size, prepare and do welding as per WPS, take sections and do metallography examination. NDT for this is unknown to me. Engineers, think what we have done to the environment !https://www.linkedin.com/in/goutam-das-59743b30/

@sentrifice Could you give some comments on the sketch as a token of appreciation, Such that I do not regret the time spent? Engineers, think what we have done to the environment !https://www.linkedin.com/in/goutam-das-59743b30/

Assuming that the old pipeline is corroded and after measuring the thicknesses, there is a feeling that it can still be used. Under such situation I propose the following for additional safety(for review by experts) Basically, a fabricated reinforcement is shown for strengthening of existing...

As per Sec IX QW-202.3 "WPS qualified for groove and fillet welds shall be applicable to weld repairs to groove and fillet welds-----" So qualified weld procedures can be used for repair welds also. For additional safety, a repair weld sample(with the required removal of HAZ) can be further...