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  1. Taicho567

    Requirement of Manual Ball valve between ESDV and MOV in Pig trap area

    It must be their SOP or their maintenance practice that they have to abide. Well the CAPEX and OPEX are there to be utilized, good for their contractors though
  2. Taicho567

    What do all the useless engineering graduates do for work?

    No one is useless until they decide to be useless. Make yourself helpful and you will learn a skill or two.
  3. Taicho567

    need help on where to go in the engineering field

    If you have multiple offers, then you have the luxury to choose. Start by asking around, and get their feedbacks. If you have a limited offer, or only one option then you have no choice but to grab that option and see where you go from there.
  4. Taicho567

    IP65 PROTECTION CLASS FOR NON ELECTRICAL EQUIPMENT

    IP rating is implemented to protect the equipment from water or dust from seeping in which would affect the operability of the equipment. This is not applicable to valve that don't have electronic or electrical component. If you are worried of the water or dust seeping into the valve's parts or...
  5. Taicho567

    Two instrumemts, Same Loop

    I'm not sure I understand this question. Do you want to share the same loop? LT and PT give different value and reading from each other. Each of them has independent hard wire going to an individual AI channel at the DCS/PLC IO card so that each of the reading doesn't mix up with each other...
  6. Taicho567

    Response time calc for using longer impulse tube

    What type of LT that you are using? If it is DP LT, tubing length (horizontally) wont affect the reading and like georgeverghese mentions, once the line is flooded, it wont affect the reading as it's reading the pressure. However, you need to take into account the height of the tubing...
  7. Taicho567

    PSV checking

    The pressure set point of the PSV so that the weakest point of the associated system (pipeline, vessels, etc) can be protected by the PSV. That is, the set point is normally set at the MAWP of the system. Also, take a look at the over pressure accumulation of the PSV which depends on the type of...
  8. Taicho567

    Pressure Control Valve vs Flow Control Valve

    physically no difference, not that I know. Maybe I can learn a thing or two here but not that I know of. PCV and FCV have the same built. Trims, bonnet, stem, positioner, actuators, etc. The wet parts are the most important as the built are dependent of the fluid characteristics (fluid state...
  9. Taicho567

    Heater Burner Ex Rating Requirements.

    "In an oil and gas plant, the decision to use an explosion-proof (Ex) rated dual-fuel burner (for gas and diesel) depends on the classification of the hazardous area where the burner will be located. The Ex rating is often required for equipment in potentially explosive atmospheres to prevent...
  10. Taicho567

    Possible Interview about Engineering.

    I'm from O&G and I can't say much about other industries. I'd say any engineering profession that involve very high pressure process, flammable fluids, extremely high or extremely low temperature process would be an interesting choice. These conditions would require a state of the art...
  11. Taicho567

    What Are the Biggest Challenges in Schematic Design for Industrial and Construction Projects?

    I'm not a designer and I've never done the schematics hands-on, but I've worked with Approved For Construction schematics for green field projects as well as As-Built schematics for brown field projects. Green field schematic is pretty much straight forward. From nothing to something and...
  12. Taicho567

    Well I'd say it would not be necessary to test it at 1480psi because I'm pretty sure those...

    Well I'd say it would not be necessary to test it at 1480psi because I'm pretty sure those valves have been tested at factories before shipped to site. 1125psi is suffice but this is only applicable at one end of the pipe (valve inlet end). You have to test the pipe at the outlet end too. But...
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  13. Taicho567

    Pressure Differential

    P= (nRT) / V The bigger the volume, the smaller the pressure, provided the n R T are constant. So there would be a dP.
  14. Taicho567

    Natural Gas Cavitation

    It's not a concern here. It's in gas state so cavitation won't occur. Your gas temperature need to be really low at a certain pressure to change it to liquid, which is not going to happen in your case. No liquid, formation of bubble is not going to happen. Cavitation occurs when the liquid...
  15. Taicho567

    Learning How to Type

    The Typing of The Dead. When I was a kid, I learnt my typing by playing the game. I'm not sure about you though, as this is a video game. Considering your age, you may not want to consider this. But there is no harm trying. The game was fun though.
  16. Taicho567

    Instrument Calibration

    Normally you would refer to your internal procedures. The place I worked at - I believe the practice was generally applicable to all - do a yearly calibration on non-critical equipment. The critical equipment, on the other hand, would have a shorter interval, say bi-yearly calibration. With...

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