j. Valves Piping Components - Modeling Approaches, Tips, Techniques used in AutoPIPE


Attention: Please see the following AutoPIPE help section: 

Help > Contents> Contents Tab> Modeling Approaches> Modeling Approaches>

This help has been provided in order to give users ideas for modeling typical piping arrangements. The steps shown in each example should not be taken as the only method available to create models. In addition, the intent of the examples is to present ways to create adequate models of specific piping components for analytic purposes.

          Anchors        Bends
          Cuts              Flexible Joints
          Frames         Hangers
          Nozzles        Pipes
          Reducers      Rotating Equipment
          Supports       Tees
          Valves           Vessels

Notes: 

1. AutoPIPE does apply thermal expansion coefficients to VALVE components. The corresponding Temperature load case, (ex. T1, ..Tn) and expansion parameters on the Press/Temp/PipeID input grids are used to determine how much expansion will occur.

2. When selecting the Valve Manufacture, Standard, subcategory, and Type settings on the valve dialog, specific available library data will be used. However, using the AutoPIPE Generic selection, the same valve can be modeled. Only difference is that the user will need to manually enter data instead of using automatic library data. 

Comments, Questions, and Answers:

  1. Model Approach:
    1. 3-way valve
      •     
    2. Angle valve (90 deg valve)
    3. Pressure relief valve
    4. Fire hose valve
    5. Butterfly valve
    6. Reducing valve
    7. Complex valve (ex. Bell & Gossett Triple Duty Valve)
    8. Large double offset valve
    9. Valve actuator and support
    10. Valve + actuator based on catalog info with combined values
    11. Valve submerged in water
  2. Surface Area factor and calculation
  3. Stiffness value of a valve
  4. Drop down listing issues:
    1. Specific valve missing - General Modeling approach
    2. Pressure rating list only NS (Non-Standard)
    3. Flange / Valve rating not listed
    4. Missing specific information?
  5. Why is wrong weight used when inserting a valve?

When inserting a valve with flanged end connections on both side, the wrong weight is automatically applied to the flanges. example: add a GateF Class 300 valve and tick the insert flanges option the flanges by default are the same weight as the valve.

Answer:

This is a known issue and has been logged under CAE-TR-10614  Using insert flange on both ends copies the weight of valve to flange and was fixed in AutoPIPE V8i 09.06.00.07 and higher.

 

See Also

Model Different Types of PIPING Components

Bentley AutoPIPE