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  • Users: alibabaaaa
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  1. alibabaaaa

    Local membrane stress in lug support

    Hi everyone, I'm designing a vessel of ~1m3 supported by 4 lugs to horizontal structural members (It contains water at 35°C). Due those, the shell should have a local stress concentration in each lug, with a bending moment and shear stress. Despite the ASME code, section VIII classifies this...
  2. alibabaaaa

    Fuel cell basic calculations

    Hello, Is there any fuel cells expert to provide some rough magnitudes please about their efficiency? What is the rate of supply of hydrogen and oxygen (eg in litres per minute) for a given fuel cell of specific size (I assume volume or area) and how much power (energy per time) that produces...
  3. alibabaaaa

    Exhaust gas volumetric flow rate

    Does anyone have an indication of the exhaust gas volumetric flow rate of diesel engines? I read in this graph: http://www.sokken.co.jp/files/products/AirFlowmeters/modal_JE05-1.PNG from this webpage: http://www.sokken.co.jp/en/flow/201011/entry3.html that for a 4L diesel engine, the maximum...
  4. alibabaaaa

    Gas sampling per second

    Hello! I don't know if this is the most appropriate forum. Do you know any gas sampling system that will collect gas samples per second and store them in capsules or something to analyse them at a later stage? I have a pipe ejecting gas and I want to analyse the gas per second, but without...
  5. alibabaaaa

    Fastener operated by foot

    Hi. I am looking for a fastener that can replace a normal bolt and screw, but I need it to be able secure/unsecure it with your foot. Is there anything like that? Lazy operators complain about having to bolt a bar holder with 6 bolts so I am looking for something faster and convenient. Any idea...
  6. alibabaaaa

    Abaqus deflection control problem | job successful | but no bending | zero result

    Abaqus deflection control problem | job successful | but no bending | zero result 3 point bending test to get load deflection curve Please help to correct the mistakes in this supported files are...
  7. alibabaaaa

    Advice on crane, 2 speed motor running with contactor, want to change to VFD

    Hello I have a requirement from plant, we have a crane working with a two speed motor (nameplate attached to the post) right now we control the motor with two AC contactors (low and high speed) and brake. I do not have the electrical drawings We want to remove the AC contactor control adding a...
  8. alibabaaaa

    Selecting motor and gearbox

    I need to review some criteria for design of electrically-driven machines, especially for proper selection of electric motors and gearboxes. I know some of this stuff from an university course that I took some years ago, in Italy. I have some resources in italian but now I would like to study...
  9. alibabaaaa

    utility diagrams

    Hi In an industrial plant,how is comprehensive utility piping (water, Steam, Compressed Air...) documented and identified? Examples are welcome. Thank you.
  10. alibabaaaa

    Sizing Api 521

    Hi everyone, i have to size a safety valve using API 521. Do i have to follow the standard orifice table in API 526 (D, E, F, ecc.)? I'm not sure about that because over this table the standard says: "These effective areas are valid only when used with the sizing equations in API 520, Part I"...
  11. alibabaaaa

    Sizing liquid valve API520

    Hi everyone, i'll learn how to size a liquid valve according to API 520. After reading this standard i understand how to determinate the orifice size (using a preliminary Kd of 0,65), but at this point i can't understand which of my valves should i use. For example: Table orifice size E = 0,196...
  12. alibabaaaa

    Catia portable script center v2.0 ?

    Hello everybody I have the famous (and very useful) "CATIA portable script center v1.6" by ferdo, but i have seen on the forum that a v2.0 exists. Is there a way to download it? Links from thread560-298847 ...are dead. Thanks in advance! Cheers

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