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  1. ARHeit

    Quanity of Pickling Paste

    Bing search it, or check your container: http://picklinggelpicklingpaste.com/pickling-paste-pickling-gel-stainless-steel-weld-cleaner-stargel.php They say 90-100m weld length/kg. But whatever product you have or choose is bound to be a little different. "Whether you think you can or think you...
  2. ARHeit

    Valve Handwheel Design

    There's quite a bit of information showing up with a simple bing search of "valve handweel dimensions" http://www.industryarea.com/Knife-gate-valves-Y1829-S6-catalogue.html http://www.documentation.emersonprocess.com/groups/public/documents/bulletins/d500239x012.pdf...
  3. ARHeit

    How to calculate half obround vessel

    I used to work for a firm that designed vessels fairly similar to this. A few design recommendations: have 3 separate jackets that can be connected with plumbing. One that will be annular for the bottom and then two flat jackets. We also did the stayed construction for our jackets. It's all in...
  4. ARHeit

    Branch-Line Pumping with Multiple Pumps

    I would suggest that the exact pump curve will be a difficult thing to solve for. You'll need to subtract from "E" the losses of head and flow for branches "B", "C", & "D". You need to consider that the system curve for branch "A" is not simply the two pump curves added together, it is that of...
  5. ARHeit

    Branch-Line Pumping with Multiple Pumps

    If you are using a sizing pump in Pipe-Flo on a branch (like P2) with two nodes on either side connected it will assume that the pressure differential is zero, or very close to that due to minimal piping between endpoints. You'll have to add a flow requirement so that it can have something to...
  6. ARHeit

    How to size a pump suction from top to discharge bottom?

    I'm going to guess you are a student and this is a homework problem, the systems sound to theoretical and loosely defined with just enough information and focus. http://www.pumpfundamentals.com/tutorial2.htm Checkout the website above, it might have some better visuals to describe suction and...
  7. ARHeit

    Butterfly Valve Leaking

    I've only been in the industry a couple years myself, but I would look up slurry valves and resilient seated butterfly valves. One of the grey beards on here will probably have better advice, but that's where I might start. But also if plant maintenance doesn't care to maintain them, things will...
  8. ARHeit

    Designing to ASME VIII & need compliance to PED.

    In PED 97/23/EC Annex 1 7.1.1 it says that the yield limit should be a 1.0% proof strength for austenitic steels. The values from ASME II table Y-1 are 2.0% calculated values. The europeans told us that as a saftey factor they have only ever accepted the low values for the reasons that they are...
  9. ARHeit

    Designing to ASME VIII & need compliance to PED.

    I don't have a copy of the code books currently, but that looks correct from memory. Some material specs are listed twice but have different values. I've heard these referred to as the high and low values. Found this related discussion: http://www.eng-tips.com/viewthread.cfm?qid=318287...
  10. ARHeit

    Designing to ASME VIII & need compliance to PED.

    I think everything I could suggest has come up except for one item: double check your material specifications. We were using ASME to calculate material thicknesses using the ASME high stress values for material at elevated temperatures from ASME Sec. II, when going through the process of filing...

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