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  1. navycaptain

    are there any problem in the PSV design

    Dear engineers: Attached is an installed pressure safety valve? are there any problem in the design? In my view, the discharge pipe is directly connected with elbow, is it necessary to conncet a spool and then connect with the pipe? what do you think of it? thank you! Youth is not a time of...
  2. navycaptain

    drill a square rectangular hole(850mm*300mm) on a blast resistant wall of instrument cabinet room

    Dear engineers: I received an engineering deviation recently, it's planning to drill a hole on the balst resistant wall of instrument cabinet room because the design institution forgot to design instrument rack and cable trays. My question is: is this kind of hole can influence the...
  3. navycaptain

    upstream and downstream pipe length of rotameter flow meter

    Dear Engineers: I'd like to ask a question: what is the minimum length of upstream and downstream for rotameter flow meter? Normally,upstream is 5D of the diameter and downstream is 3D of the diameter, but I met with one possible problem: sometimes, it's hard to make perfect flange coaxiality...
  4. navycaptain

    the chemical storage tank farm bund(dike) design

    I'd like to ask an question about bund shape design.In order to contain the chemical imperviousely during storage tank crack or catch a fire. the bund are suggested to design like sea wall with slope(see the attachment), this can be stronger than vertical bund wall. As the incident...
  5. navycaptain

    pressure transmitter capillary lines use CTFE as filling material

    Normally, silocon use as filling material for capillary line, but HF service pressure, silocon can reacte with HF if there is some leak from the diagram, and it can form explosive mixture, one of my plants have occured such accident, then i checked API751, it mentioned that CTFE can be used as...
  6. navycaptain

    how to calculate the maximum flow velocity of flammable liquid?

    Dear all: I'd like to ask you a question: how to calculation the flammable liquid DMC(Dimethyl carbonate CAS No. 616-38-6) which MSDS is attached, it's designed flow rate is 12.5m3/h, DN40 304 stainless steel pipeline which velocity is 2.7m/s, but there is an opinion which is velocity should...
  7. navycaptain

    how to prevent corrosion by inherently safer design?

    Hi Folks: This is my first time to raise a thread, if there is something wrong to disobey forum rules, please kindly get me noticed, thank you! I'd like to discuss with you professional guys about how to prevent corrosion by inherently safer design. For example, there are some area which is...

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