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  1. Chiller

    Aluminium coating on super duplex?

    It has been requested by our clients that super duplex under insulation must be Alumium thermal spray coated. Are there anybody with such experience, or thoughts to whether this is a suitable thing to do? Will the application of heat when coating have effects on the macro structure of super...
  2. Chiller

    DIN Spec & Certs for ASME fittings/flanges

    I wasn't sure which forum to place this queation, but I guess we vessel guys have more experience/knowledge?!? ;) Is it possible to buy ASME B16.5 flanges (dimension wise) in DIN material and specification? Note - I do not mean ASME material flange/fittings with DIN certs. If they are...
  3. Chiller

    Best PV Design Software

    I'm sure there will be a few biased comments here, but can anyone please advise which is the best pressure vessel design software. As a minimun the software must be able to design to ASME VIII div1 & PD5500. All other codes will be a bonus. eg Stoomwezen, AD-Merkblatter, TEMA With everyone's...
  4. Chiller

    Supports on elbow in horizontal pos'n

    Can anyone please advise how I should model a support offset from an elbow in the horizontal position on Caesar? i.e. the elbow has a welded trunnion to which the supports are fixed. Is it acceptable to use C-Nodes? Appreciate all your expertise! Thanks in advance. Does anyone know whether...
  5. Chiller

    Pig Lauchers/Receivers Design

    Can any one please direct/advise me how pig launchers and receivers are sized. Our clients have given us the diameter of the traps and have asked us to specify the lengths. Is there specific ratio of lengths that we must adhere to? Is the eccentric cone angle and length critical? Our client has...
  6. Chiller

    impingement forces

    Easy question for you all. 1) How do you calculate the impingement force on a flat plate with say a 10" nozzle with a fluid velocity of 50m/s with a varying direction of flow (say 0 deg to 90deg). 2) How do you then calculate the addtional load caused by say a 50kg slug carried within the...
  7. Chiller

    AS1210 - Australian standard

    Does anyone know why all AS1210 class 1 vessels need to be stress relieved? Can the vessel still be class 1 if it wasn't PWHT? Considering the vessel is CS and the internals are SS (all welded) is this a wise thing to do? If there are no answers to the above, is there a forum / website /...
  8. Chiller

    Double pipe heat exchanger design

    Does anyone have a design method or can lead me to a site for double pipe heat exchangers. I am specifically looking for the following calculations: - 1) to determine blocking ring/tubesheet thickness. 2) differential expansion stresses on blocking rings and shell & determine whether bellows...
  9. Chiller

    Min fillet weld size

    Does anyone have any ideas to how you would size fillet welds around wrapper plates to a pressure vessel that is also in cyclic service? Also how would the fatigue stresses be calculated? For example - a horizontal vessel on two supports with wrapper plates. The vessel supports have been checked...
  10. Chiller

    ASME B16.5 Flange Design cf ASME VIII div 1 App2

    When standard pipe flanges to B16.5 (or any other standard) are used as main girth flanges in a heat exchanger for example, how does one calculate the bolting moments to transfer to the tubeplate? Although the pressure/temp rating is adequate for the service it is always difficult to prove the...
  11. Chiller

    Weld Proximity - good engineering practice?

    Some design codes define a min distance between welds as a good engineering practice, such as PD5500. In a lot of cases, nozzles and attachments can sometimes be so near to a main weld seam (and in my present case on it). Does anybody have any thoughts about this matter? If like in my...

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