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  • Users: MechP
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  1. MechP

    Pump suction line priming

    Hello everyone, I’m evaluating cost effective proposals for a flood control pump system that also allows for convenient maintenance. One option is to install dry vertical non-self-priming pumps next to the wet well. The pumps would start with a water level on the wet well above the suction line...
  2. MechP

    Ruler type level indicators for tanks

    Hello everyone I'm looking for some guidance for marking the tank level for a floating type level indicator. The indicator that was provided does not include the ruler itself; only a marker that slides vertically (see attacjed file). We are considering on painting or attaching markers on the...
  3. MechP

    Pigging through different pipe thickness

    Greetings all, I'm having the following issue with a piggable pipeline: The pipeline has been designed in accordance with ASME B31.4, however the location of the launching and reciever traps has been designed in accordance to ASME B31.3. The piping class indicates that for the pipeline the pipe...
  4. MechP

    Movement of in-service pipeline

    Greetings everyone, I'm involved in a project that requires lowering a live pipeline, currently laid on the surface, into a trench. We have worked out the requirements according to API RP 1117, however we are having trouble working out a detail that is out of scope of the recommended practice...
  5. MechP

    Wear in fittings

    Hello everyone, What is your advice with respect to erosive wear in a tee fitting when the flow is directed into the tee through the branch? In other words, the branch of the tee is not deriving the flow but rather the entire flow enters through the branch and splits almost equally along both...
  6. MechP

    Electric vs. pneumatic deluge valves

    Hello everyone, I've been looking into deluge valve manufacturers but I'm not clear on the application difference between models that operate solely with electric solenoid actuation and those that have electric solenoid pneumatic actuation. At first view it would seem that pneumatic actuation...
  7. MechP

    SS piping with threaded broze valves

    Hello everyone, I'm doubtful on material compatibility for a piping project compliant to ASME B31.3. Threaded bronze valves are to be installed on stainless steel pipe A-312 carrying crude water. As for corrosion between materials, is there a justification per standard ASME or ASTM that allows...
  8. MechP

    ASME Sec. VIII div. 1, appendix 13, reinforcement intersection

    Hello everyone, I have the following issue: A rectangular vessel designed as per ASME Sec. VIII div. 1, appendix 13, with distributed external horizontal reinforcements. Some of the nozzles happen to intersect the external reinforcements. Unfortunately these nozzles cannot be displaced. For...
  9. MechP

    Load cells under vibration

    Hello everyone, I'm searching for a type of load cell with quick response and accurate output for an aerodynamic balance. I don't have much experience with load cells and I need to measure forces like lift and drag in a wind tunnel, but I'm concerned about vibrational effects and random...
  10. MechP

    Valve rating and material

    Greetings everyone, Our client has requested the procurement of a 2" ball valve #6000, threaded + NACE. I've checked ASME B16.34 for valves including threaded ones and the rating designation goes up to 4500, and according to API 6D, the rating goes up to 2500. Can there be a mistake on this...
  11. MechP

    Welders per joint

    Hello everyone, My issue has to do with the limitations of a welder to produce a single pipe joint. Is there a condition per ASME B31 codes or ASME sec IX, that stipulates when a pipe joint must be welded by a couple of welders instead of a single welder? Usually we establish that for a NPS...

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