Hi Everyone,
Thanks for input. I have got the workshop manual for the electric motor now and this holds my answers. For this motor in constant torque application motor is good for 60Hz and down below 25Hz will have cooling issues. An electric cooling fan is avaiable from the manufacturer to...
Hi Guys,
In the very early stages of looking at a VSD for a PD gear pump and my knowledge is purely theoretical (and limited). Basically what is the practical frequency range I can operate a electric motor at to get my flowrates.
Normal supply is 415V 50Hz. Motor is 4 pole. so approx 1500RPM...
Mike,
Just did something similar myself. I used a laser scanner placed inside the tank to collect cloud data. I then had this analysed and used to produce a drawing of the roof truss structure. (it was acurate enough that they could determine beam dimensions and thicknesses). This data was then...
So I have just jacked my tank at great expense to replace annular plates as it was condemned by my API inspector due to insufficient thickness in the critical zone (tomb stone repairs are not permited due to elevated temperature service).
The concern in this case in the critical zone (near...
Your tank should have calibration tables or you can get it calibrated by a certified agency.
Otherwise cross sectional area times height gives volume. Find a correlation of your products density vs temperature and simply multiply for the mass.
Hi All,
Does anyone have expierence with CP on elevated temperature stroage tanks (or on any tank). I am familiar with design for regular temp tanks but was not sure if there is something about elevated temperature that make it not work or some trick I need to know. I know for a regular storage...
Hi Everyone,
I live in South Australia and due to recent drought water is an extremely rare and far to valuable a resource to waste on a hydro test if not 100% necessary. I plan to jack a tank and replace annular plates. If say I use qualified welders, a good welding inspector, perform 100% mag...
Good Point Duwe6. I am down here in Australia and I have the main reputable tank company telling me to jack the tank. I then have local contractors that are very good welders and structual type people saying they could just insert plate (but they have little knowledge of API 653). So I really...
Thank you again IFR's for you input. I appriciate all the help you have given me.
I have left my copy of the standards in the work place. If im not getting it I would really like a diagram of how to weld this !!. Or is it like this? pack up the difference with oil sand?
IFR's. Thankyou very much for you reply.
Are you able to slot and insert when only replacing the annular? I can just picture that the annular plates would need to angle down to meet the exiting floor plates and I would be nervous of overstressing at this critical area. I can see that if you...
Hi All,
I have a 24m diameter tank that requires replacement of all annular plates. First question do I jack the entire tank or replace the plates 1 by 1. I am thinking that jacking the tank will allow a better job of replacing the plates and that it will ultimatly be quicker as I can have...
