Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. JT100

    Best Pipeline Book

    It sounds like you are after a piping textbook as opposed to pipelines. There are several places that run courses on this, it might be worthwhile looking into that as opposed to working your way through a textbook? I know Stratchclyde uni have run short courses on piping and piping stress, and...
  2. JT100

    Pipeline Stability - Effect of Wave Period

    Thanks Big Inch, so given a set of metocean data is it down to engineering judgement as to what period you would use. For example, when considering pipeline/spoolpiece stability and given the maximum wave and a range of periods? It is my experience that the maximum wave be used in conjunction...
  3. JT100

    Pipeline Stability - Effect of Wave Period

    When analyzing pipeline stability using morisons equations, the stability generally decreases as the wave period is increased. Is this due to to a longer period carrying a larger volume of water and hence generating a larger force on the pipeline? As I would assume that a lower period would also...
  4. JT100

    Piping - Effective Force (Pressure and Temperature)

    Thanks Big Inch, I was looking for a way to calculate the forces away from supports. Say I have piping routed between two supports, anchored at one and guided at the other. How can I calculate the effective force due to pressure and temperature mid way along the piping (between the supports)?
  5. JT100

    Piping - Effective Force (Pressure and Temperature)

    The majority of my experience is related to subsea pipelines so excuse me if this question is obvious. Now for a pipeline if I want to consider the effective force I generally have two options, the fully restrained force (made up of end cap, thermal and poisson effect forces) or if I am looking...
  6. JT100

    API Swivel Ring Flange Bending Moment Capacity

    No bending at all? What about in subsea piplines/spoolpieces? Wouldnt a WN-WN make up prove a great deal harder for divers?
  7. JT100

    API Swivel Ring Flange Bending Moment Capacity

    I am aware that an API 17D 17SV swivel ring flange will generally have a lower bending moment capacity than the equivqalent API 6A 6BX (or API 17D 17SS) weldneck flange. In the past I have used API 6AF for a guidance on the capacity of a flange, however since this is only applicable for...
  8. JT100

    PD 8010 Hydrostatic Testing

    it depends where your pipeline is? onshore/offshore etc? part 2 deals with subsea pipelines and the test is 24hours
  9. JT100

    Subsea Pipes design and loads

    theres some good info in this thread: http://www.eng-tips.com/viewthread.cfm?qid=146756&page=1 good luck with interview
  10. JT100

    Weighted Coating System

    Yeah thats always an option, client has already gotten the spoolpieces manufactured so i was looking into alternative solutions.
  11. JT100

    Weighted Coating System

    its a subsea spoolpiece that will not be mattressed and so will need to be stable under 100 year maximum environmental loading and so an increase in wall thickness is not really an option, would have to increase it by far too much.
  12. JT100

    Weighted Coating System

    I'm looking to find a weighted coating system applicable for a 2inch spoolpiece approximately 50m long. I've looked into concrete coatings however these are generally only applicable to 4inch+ from what i've read. I'm sure there must be a wrap/half shell system that can be used on spools but...
  13. JT100

    Upheaval Buckling of Buried Pipeline

    MikeH is correct in that if it was a lateral buckle you wouldnt see it, however in my experience lateral buckles tend to appear on non-buried lines and arent as highly stressed as UHBs due to the deflection being concentrated into one location (in lateral buckling the restraint is constant). i...
  14. JT100

    Compressive Axial Force: Pipeline

    Thanks BigInch, apologies I was meaning during operation, after tie-in. The effective axial force resulting from pressure and temperature etc. What do you mean by "V" tie-in spools, are these the vertical tie-in design that tend to be used in deep water?
  15. JT100

    Compressive Axial Force: Pipeline

    I know that over a pipeline the effective axial force is compressive (negative), and that it builds up to a constant value over the so called 'anchor length'. The 'anchor point' being the point at which the effective axial force in the pipeline equals the friction between the pipeline and the...
  16. JT100

    Vertical Pig launcher/receievr

    No, something that can retain the pig, usually used in vertical launcher/recievers- they protrude into the oversize barrel of the launcher. They are used in multiple pig launchers, and also prevent accidental launching etc
  17. JT100

    Vertical Pig launcher/receievr

    Does anyone know any vendors of launch pin mechanisms?
  18. JT100

    Vertical Pig launcher/receievr

    I would also be interested in this, in particular what are the standard methods used in pig launchers to contain the pigs and to prevent accidental launching? Such as launch pins/valves etc.
  19. JT100

    Span analysis

    So would a fixed-pin or pin-pin be considered conservative in calculating the natural frequency?
  20. JT100

    Span analysis

    I am currently performing an allowable span analysis for a pair of piggybacked pipelines. I have been asked to use DNV 30.5. I am having a bit of trouble understanding the boundary conditions that are to be used, I understand that assuming fixed-fixed end conditions will underestimate the...

Part and Inventory Search

Back
Top