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Recent content by tickle

  1. tickle

    Vessel Nozzles Diameter and Location

    Shvet I suggest that as an engineer you need to at least identify what the correct solution is as per LittleInch's advice. The first step would be to discuss with the pump vendors. The impellor may be able to be changed, pump speed (VSD/VVVF), the pump displacement, or an orifice on the...
  2. tickle

    Views on submitting native files

    Ron I believe there is a difference between submitting a file and providing the file to a client. I use AutoCAD files as an example, the client will need the native to allow it to update in the future (I am basing my comments on OnG industry, but it could be applicable to structural drawings as...
  3. tickle

    Client Requesting PE Stamps on Documents (Not for Jurisdictional Reasons)

    One Australian client required that all calculations were "stamped" by a suitable chartered / registered engineer (ie same discipline) even though only one state in Australia requires registration (do not quote me on this wrt structural engineers that may require registration in more states /...
  4. tickle

    impact of changing PSV operating pressure

    Two things that should be considered during the design: 1. I am not sure about the piping arrangement, but the you need to ensure that the inlet pipework to the PSV is full of liquid 2. If you are considering the effect of external fire, the PSV is relieving vapour (typically). What impact does...
  5. tickle

    Views on submitting native files

    If you were revising a drawing (layout, P&ID, SLD ...), the native file belongs to the owner, and the engineer will send the native file to the client with the invoice. I am sure that no one has a problem with this, and processes are in place to protect the engineer should the native file be...
  6. tickle

    calculation to determine compressibility factors

    Try the GPSA gas property calculation from Dennis Kirk http://members.ozemail.com.au/~denniskb/calcsdload.html
  7. tickle

    Demolition PIDs and drafting workflow on brownfield projects

    I am not sure that a set of rules can be put down that will satisfy each and every project. At the end of the day, the benefit of producing a demolition P&ID should be considered against the benefit that it adds. A demolition P&ID for the installation of flanges adds little value, but a...
  8. tickle

    Decommissioning Safety Critical Elements

    Surely this is covered by Change Control in your organisation, noting that it is not only a cost saving measure, it is removing more points of failure. If the correct level of engineering justification is done (HAZOP and calculations), then the risks assessed for removing and not removing the...
  9. tickle

    How to avoid a private meeting with boss

    Thanks for the reply, but still some of the responses you have received, in my opinion, are unprofessional. I acknowledge that it is only my opinion and that everyone has one. I was thinking longer term than the environment at your current place of employment. You will be extremely lucky if you...
  10. tickle

    How to avoid a private meeting with boss

    I am flabbergasted by some of the responses, but there are gems of knowledge in there (Ron, zeusfaber, MintJulep). Remember that there are always three sides to any story; employees, employers and the truth. I cannot see how the forum can provide advice without more details. All that was...
  11. tickle

    Wearing multiple hats

    To me construction management can be boiled down to two simplistic things. Making sure the construction matches the drawings and that foreman is preparing for the next task. ie be one step behind and one step in front all the time. Hopefully the foreman is thinking beyond the next task, but...
  12. tickle

    Crack Arrestors - long running brittle fractures

    Thank you to Saplanti and Brimmer for your helpful comments. You have both hit the nail on the head of the knowledge we have and what we are trying to achieve. There is always some possibility of an incident, and there is a need to reduce the consequence to reduce the residual risk...
  13. tickle

    Crack Arrestors - long running brittle fractures

    All I would be grateful for advice on the use / availability of crack arrestors to arrest long running brittle fractures in a pipeline. The pipeline of interest is old, transports natural gas, and is made from X42 steel with a low toughness and high ductile brittle transition temperature. I am...
  14. tickle

    Laptop Screen Size

    I had a 17", then went to a 15" and then another 15". The 15"s were great (even if the case on the first one was a bit fragile). I appreciated the reduction in weight. The biggest problem for me was keyboard. The 17" one had a full keyboard with number pad, similar to the one on the docking...
  15. tickle

    SPECIFIC HEAT RATIO ON HYSYS

    My suggestion is to ask the Hysys helpdesk, it is very helpful. I have asked them this question myself in the past and got a fulsome response. I cannot remember the response fully but recall that cp and cv are derived from the enthalpy values, as Apetri states.
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