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AutoPIPE Wiki 01. How to ensure proper alignment of the compressor nozzle and piping?
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            • 01. How to ensure proper alignment of the compressor nozzle and piping?
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    01. How to ensure proper alignment of the compressor nozzle and piping?

    Applies To
    Product(s): AutoPIPE
    Version(s): 2004, XM, V8i 
    Environment: N/A
    Area:
    Subarea:
    Original Author: Bentley Technical Support Group
    Date Logged
    & Current Version
    Feb. 2015
    09.06.01.10

    Problem:

    I have a basic question regarding modeling piping in a compressor station.

    Typically, the compressor is installed first and properly leveled and grouted.  The pipe (discharge and suction) is installed next and all adjustments to the piping are performed until the mating faces of the pipes and the compressor nozzles are accurately aligned. At this point all the gravity load from the empty pipe is carried by the supports on the pipes and no load is transferred to compressor nozzle. After assuring that the pipe and the nozzles are accurately aligned, the pipe is connected to the compressor nozzles. At this instant no load from the pipe is carried by the compressor nozzle. When the system is in operation the compressor nozzle will be subjected to all the loads (temperature, pressure, gas in the pipe) that occur in the system subsequent to the initial connection between the pipe and the nozzle. How is this scenario correctly modeled so that when the reactions are printed, it will show zero reactions at the compressor nozzle?  

    Answer:

    This has already been replied to in Be Communities:

    http://communities.bentley.com/products/pipe_stress_analysis/f/275801/t/61397.aspx

     The adjustments that you mention before connecting to the pump may need to be modeled to insure no displacement under gravity load. Imposed support displacements or cut-short or similar adjustments needs to be added in your model to probably predict what will happen when adding the thermal load. If a physical anchor is added on suction and discharge then the pump will not get the loads.

    See Also

    Bentley AutoPIPE

    External Links

    Bentley Technical Support KnowledgeBase

    Bentley LEARN Server

    Comments or Corrections?

    Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to
    the "Comments" area below. THANK YOU!

    • AutoPIPE
    • Modeling
    • Compressor
    • Rotating Equipment
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    • Mike Dattilio Created by Bentley Colleague Mike Dattilio
    • When: Wed, Feb 18 2015 9:26 AM
    • Revisions: 1
    • Comments: 0
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