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  • Users: trentar
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  1. trentar

    example of 12516 valve design calculations

    hay i am searching an example of valve design calculations acc to iso en 12516 for valve wall thickness, bonnet flanges and stem. can somebody post some numerical example? thank you
  2. trentar

    numerical example of valve design calculations acc to iso en 15761

    hay i am searching an example of valve design calculations acc to iso en 15761 for valve wall thickness, bonnet flanges and stem. can somebody post some numerical example? thank you
  3. trentar

    PWHT for 13CrNi45

    Hay what is the PWHT regime for 13CrNi4-5 material as per ASME? Thanks
  4. trentar

    Maximal allowable pressure for actuators and maximal actuator blow up pressure

    Hay ! Does there exist a standard which defines the maximal allowable working pressures of the valve actuators? Does somebody know some test which can be performed for this? Can this be calculated? What about maximaldamage pressure for the actuiator-by this I mean the pressure which can be...
  5. trentar

    SIL control valves

    Hello to all! Let say that we have all available parameters for SIL of valve (Lambda valve, PFD valve), actuator(Lambda actuator, PFD actuator), solenoid valve (lambda sov, pfd sov)and booster (lambda b, pfd b). Can you tell me how do you estimate SIL parameters from individual parameters for...
  6. trentar

    phosphate conversion coating for the cast valve bodies

    Hay there! has somebody some experinces with phosphate conversion coating for the cast valve bodies used for valve applied in oxygen process. To use it as corrosion preservation. Some info if according to wha, aiga, and so on. any input is welcim! Thanks
  7. trentar

    Question

    Hay! I have a A351 CF8M cast steel which is full of tunder in the corners. I am aware that Hcl is not an appropriate acid but it removes the tinder away easier and mor eeffective as grinding which is not possible due to place problem (corners). If I apply HCl with a brush for 5 Minutes and...
  8. trentar

    Valve winterisation after Lloyd register

    Hay! Costumer requires a controlvalve which can survive winterisation of a ship after Lloyd register . I inspected register and there are several winterisation classes a,b,...etc Does sombody have some experiences with this subject? What should we take care on? We have experiences with...
  9. trentar

    Valve seat leak station for clean room

    Hay all! We are searching a valve seat leak station which is safe, that is secured by walls like a bunker for clean room where ultra high pure valve are produced and tested. Does somebody have some information about a supplaier of such stations or did you do it by yourself? thanks for answers...
  10. trentar

    NACE list of materials forbolts and nuts at valve

    Hay, does there exist a list of materials which are appropriate for usage at bolts and nuts at valves according to NACE standard? If yes where can I get it? I would liketo thank you for the send answer! Trentar
  11. trentar

    Seat Leakage for three way valve

    Hay ist there some special standard which describes seat leakage measurement for three way valve or should I use standard for two way valve like -ASME B16.34, -ANSI FCI 70-2, -EN 1349, -EN 12266-1, -IEC 60534-4? Thanks
  12. trentar

    Paint crosslinker for desert

    Hay! Our metal surfaces (from Al, SS, CS) are after few years completely without colour. We are located in a desert and metal surfacea are all the time located outside of buildings. We prepare metal surfcae according to paint supplier request.In few years the metal surfaces look like that they...
  13. trentar

    Standard for allowable seal tolerance

    Hay there! Does there exist a standard which provid eus allowable seal tolerance - how much is allowed? i am interested in packing seal for valves. Thank you
  14. trentar

    list of materials for valve body

    hay there! Does there exist a list of materials for valve body material which should be used for various fluids which flow through the valve for various process conditions (like pressure class, flow etc.)- If yes where can I found this list! thank you t
  15. trentar

    electrostatic charge of valve in dynamic state

    Hay! I posted this on some other part of forum but did not get answer. maybe here fits more? Does somebody knows standard which measures electrostatic charge of valve in dynamic state -> between valve openning and clossing btw. valve is working state. I would need this for ATEX,... I have only...
  16. trentar

    electrostatic charge of valve in dynamic state

    Hay! Does somebody knows standard which measures electrostatic charge of valve in dynamic state -> between valve openning and clossing btw. valve is working state. I would need this for ATEX,... I have only found standard for measureing electrostatic charge of valve in static condition EN ISO...
  17. trentar

    The Pressure Relief System Design for Industrial Reactors

    http://www.hindawi.com/journals/jie/2013/453509/
  18. trentar

    temperature fluctuation decrease in pipe flow

    Hay does there exist some prediction about temperature fluctuation in pipe flow for radial direction and turbulent profile. I would like to decrease temperature fluctuation with some additional online heater. Any input is welcomed. thanks
  19. trentar

    doppler and laminar and turbulent fluid flow

    Hay all is it possible to detect transition from laminar to turbulent water flow by flow meter which works on doppler principle? Has somebody some experiences with this? Thanks T.
  20. trentar

    degassing gas from water question

    Hay, does somebody has some know how on oxygen stripping/degassing from water by nitrogen. Does there exist some correlation/equation which provides the amount of nitrogen required for oxygen concentration decrease below some point? I plan to use tank and nitrogen inflow by some perforated...

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