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  1. garciaf

    A588 for Pipe

    Here is my issued: I would lie to know what is the difference, but apply for pipes, I do not what application is for what please help me to clarify. CORTEN A588 A588 Grade A A588 Grade B A588 Grade K Corten A Corten B A588 grade 42 A588 grade 50 Than you
  2. garciaf

    Balance vibration in pulley

    Hello everyone There is a pulley and crankshaft showed in image attach, the balance of the pulley needs to be in set the crankshaft and pulley. or only the pulley, because to these pulley we have done some reparations. Air compressor Quincy 370. Thank...
  3. garciaf

    Frequency to Open a split Case fire Pump

    Hello Here is my issued I would like to know the Maintenance frequency to open a split case fire pump in order to inspect the shaft, wearing rings,and other internal parts of the pump. There is a standard that state this. Please your comments. Thank you
  4. garciaf

    Vibration 1.7X Pump

    Do not have inducer
  5. garciaf

    Vibration 1.7X Pump

    PUMP CURVE OF PUMPhttps://files.engineering.com/getfile.aspx?folder=6e171a82-46ad-4853-9e0f-22a36f829804&file=Pump_Curve.PNG
  6. garciaf

    Vibration 1.7X Pump

    Help with these Issue. about Vibration Analysis See PDF attachement. Thanks. 1 stage Pump Fluid pump: Crude Oil. Centrifugal Horizontal Pump INGERSOLL DRESSER RAND RPM: 3540 rpm Type: 4HPX Model: HPX Serie: P-58106-02 Flow: 890 gpm /30514.27bd Motor: Reliance Potencia:250 hp Amperaje:269 amps...
  7. garciaf

    PUMPS inducer question

    My issue is the following This statament es a suppostion I have two equual Pumps, But later I decide to modify the suction adding an inducer in one of these pumps, How the flow would change in these pump. also if I change the inducer for one bigger, the flow would go up????.. please help
  8. garciaf

    Pump/Transmission

    Here is my issued: I have a Engine that is coupled to a pump (Power of engine supposed is 100 HP/ Pump1 is 80 HP) Now, I want to install a second pump (Pump2) next to Pump1. My question is I can transmit power to the pump 2 that have 10 HP, with this engine of 100HP Note: the pump2 does not...
  9. garciaf

    Pump Suction

    Thanks for your time I appreciated so much. I attached a document, please review. In the document you could find The calculations of the pumping system, and some questions that I have. what I am thinking about is to change the pump, please review the document...
  10. garciaf

    Pump Suction

    Here´s my issued: The discharge line that is installed is 4 inches diameter 2000 m in length, from the ship to Tank The tank maximum level is 12 meters Sea level to the level of tank 8 meters The pumping liquid is Gasoline Data from software: Flow: 200 gpm Diameter of suction: 4 Inches...
  11. garciaf

    Adiabatic process expression (expansion/compression)

    In an Adiabatic process (reversible) we have two different process: • Expansion. • Compression. Let’s assume we have a cylinder and a piston with a gas inside when the gas expands the gas exert a work done in surroundings. By the other hand in compression work is done over the gas, by convention...
  12. garciaf

    Best Point to take oil sampling

    What I found was the following. Sample from live fluid zones. sample from turbulent zones such as elbows sample downstream of bearings, gears, pumps, cylylinders and actuators. Sample machine during typical work conditions. Sample from the same sampling point for any particular piece of...
  13. garciaf

    Best Point to take oil sampling

    Here is my issued. In the plant are three generators. 1) Two units 3606. 1730 bkW. 900 rpm 2) One unit 3608. 2300 bkW. 900 rpm the engine oil have centifuges in order to conditioning. What is the best point to take the oil sample.
  14. garciaf

    LPG strange behaviour

    Here is my issue. After unloading of LPG (70/30) mixture from LPG tanker (refrigerated). The last condition was 5 celcius and 205 psig. It is recommmeded to have a pipe section with LPG Vapor in order to protect (hoses, pipelinem, Breakaway valve) from an overpressure due to a change in...
  15. garciaf

    Transformers

    I have to transformers each one of 2500 KVA, working 50% of capacity, so in other words both are supplying energy to the plant. Supposedly by desing one is for reserve in case of failure. Right now the total consumption is low, that one transformer can assume this charge. My question is the...
  16. garciaf

    Complex numbers in Electrical Enginnering

    Why use complex numbers to represent amplitude and phase of AC. How does appears in mathematical equations? I know about Euler Formula. Why do not we use matrixs?
  17. garciaf

    LPG strange behaviour

    well outshore pipeline is aproximadetely 4 kilometers(under seawater},and 20 meters from de coast to the ball valve. the behaviour is more normal it seems that stabilizes, the graphic of temperature vary between 77 F and 110 F, and the pressure between 216 and 260 psig. according to the...
  18. garciaf

    LPG strange behaviour

    My issued is the following: Premises: Unloading from a LPG tanker Liquid being pumped is LPG. Mixture 70 Propane/30 Butane Pumping temperature: 15-22 celcius. Pumping pressure: 15-16 barg One hour before ended up the unloading, the liquid pumped was Butane. outshore pipeline are aproximadelitely...
  19. garciaf

    Entropy

    Please someone explain me this according the image attached: Why a low temperature it has high entropy (low quality of energy). I do not understand this grapfic.https://files.engineering.com/getfile.aspx?folder=68d3c787-ff5f-42bb-a46c-6d74cc51246c&file=400px-Entropy.png
  20. garciaf

    THE BEST LOCATION TO MEASURE CURRENT

    WHERE IS THE BEST LOCATION (PLACE) TO MEASURE THE CURRENT OF A TRIPHASE MOTOR, IN MCC (MOTOR CONTROL CENTERS) OR IN FIELD (MOTOR TERMINALS/TERMINAL BOX). THANKS FOR YOUR HELP.

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