Hello all,
I am dealing with a long distance, large diameter oil pipeline. It has two pump station (at the start and mid-point), and typical block valve stations along the route. What is the fastest way to depressurise the section between the start of the pipeline and the mid-point pump station...
Hello,
Does anyone know if the use of Drag Reducing Agent (DRA) in a multiproduct (diesel and gasoline) pipeline will have an impact on the amount of interface generated between dissimilar batches?
Thanks
Hello,
For a typical 32" quarter turn (ball or plug valve) with gearbox, does anyone have an approximation for the number of handwheel turns required to fully open or close?
Thanks
Hi,
I recently requested a quote for a gas / water heat exchanger with a high pressure difference between the shell side and tube side. The design includes a rupture disc to protect the shell side from overpressure (designed in accordance with API 521). One vendor told me he will not provide a...
Hi,
Is anyone aware of a poly pipe product that is suitable for approx. 26 barg design pressure in 24" (natural gas service)? It's off the charts for the usual products, but perhaps there is a more advanced product that I'm not aware of.
Thanks
Hello,
For a 3 mile long 18" carbon steel buried pipeline within a gas processing plant with a max / min operating temperature of 140 / 0 deg C (32 / 284 deg F), what are the major mechanical / stress issues may be encountered? E.g. overstressing due thermal expansion.
Thanks
Hi all,
Has anyone performed stress analysis for a pipeline buried in peat? I'm attempting a preliminary stress analysis using Caesar II and an American Lifelines Alliance soil model. Actual soil data is not yet available. Does anyone have typical soil properties for peat? Although an imported /...
Hi,
If the design pressure for a piping spec is somewhere between the ASME Class 300 and 600 pressure/temperature ratings can it be labelled a "Class 600" piping spec? Class 600 flanges will be specified in the spec, but the piping wall thickesses will be calculated using the design pressure. I...
Hello,
I have encountered a pipeline design code (EN 1594), which specifies the required hydrostatic test pressure as a certain % of the Design Pressure (DP) above the Maximum Incidental Pressure (MIP).
E.g. at the lowest point in a test section the test pressure shall be 0.15 x DP above the...
Hello,
In accordance with BS 5353, API 6D, API 599 etc. plug valves can be purchased as regular, short or venturi pattern. Which pattern is best to use as the last / throttling valve on a pipeline vent?
Thanks very much
MC
Hello,
I'm specifying requirements for a diesel day tank. It will be used to supply fuel to a large and thirsty diesel generator.
Can anyone please advise if there is a design code which sets limits on the maximum size / volume of such a tank? In other words, what is the maximum volume of...
Hello,
I am doing some API RP 1102 calculations to confirm adequate natural gas pipeline wall thickness for external vehicle loading at road and rail crossings. One of the 1102 inputs is the design factor.
I am uncertain if I should apply the same design factor in 1102 as I used for internal...
