What is the difference between pipeline and flowline

I've read that a J-lay is generally for deepwater installation, however is it relative to pipe diameter as well? Is a larger diameter flowline more robust against wet buckling? S or J lay is dependent on the tension that can be applied to the pipeline, which requires more and more tension as both water depth and weight of pipe increase. Maintaining the configuration of an unbuckled catanery S lay in deep water requires considerably more tension than does suspending the pipe vertically downward to make a simple bend at the bottom.

For those smaller diameters, you could do either. From "BigInch's Extremely simple theory of everything. You would probably reel lay at those diameters and water depths if the spoolbase infrastructure is conveniently located. But that's really just a variation on an S-lay. Once it's off the stinger, its an S-shape. A very bendy variation!

Although there is essentially no physical difference in function, there is a distinction. Flowlines can face a greater risk of buckling, since pressures can be much higher and temperatures much greater, as they often carry fluids directly from well stream conditions. Higher temperatures and pressures increase compressive buckling loads in restrained pipe segments, which is the main reason that "snake laying" flowlines has become a popular method of averting uncontrolled buckling.

Very correctly, a flowline is a pipeline is a pipeline!! The designer makes the call about the buckling and other issues - all addressed by DNV. You're of course correct.

Now I can ask, why is the OP trying to distinguish between them. In this case, the hotter, higher pressure pipelines will tend to buckle before the lower pressure and lower temperature lines. So then that means the hotter, higher pressure pipelines will probably tend to buckle before the lower pressure or lower temperature pipelines.

I would say the OP is trying to draw the distinction because their user name contains ' Structural ' and not ' Pipelines '. You are probably again correct. Also contains the word "clueless" at that. OK, hopefully he's fixed up now. And on top of these the solutions of the probelms in the crude oil. So one Merus Ring can work against scaling caused by produced water and at the same time keep the paraffin wax in solution.

Installing only one Merus Ring will be onshore good for app 10 to 15 km pipe length, if the conditions are favorable for the Merus Ring.

If the length of the pipe line is longer, or the condition at the lines requires, there are more rings installed in shorter distance to each other. Offshore where there is no or far less external disturbance electrical fields one Merus Ring installed on the sender platform, just before the pipeline enters the sea, will be good for about 30 to 50km.

Offshore this is not so easily possible; therefore two or even three rings in a row are installed at the beginning of the line. Until today all our customers have only checked one or two problems at the same time, these which are the most pressing for them. One reason, there are not required monitoring equipments installed at these lines. But so far all the single most pressing problems addressed by Merus Rings in various projects have been improved.

Each single problem solved by Merus has given the customer savings in the cost of operation. If it be the reduction of the corrosion, and the resulting longer lifetime of the pipeline, or less frequent pigging, or no problem with pour point, or even less emulsion. It can also help improve the trade-off between capital costs and the cost of the energy for pumping, minimizing overall costs.

Flowlines can also be bundled together to carry different fluids or gas. They can be used to reduce capital costs by combining many wells into a network that connects to common terminal point. The Oooguruk offshore Arctic flowline system design, construction and operation satisfy the unique conditions presented by this shallow water Beaufort Sea location.

The maximum water depth along the flowline route was only 7 feet but the location immediately offshore the Colville River Delta presented challenges with the flowline loading conditions, thermal interactions with the local environment and construction procedures. The subsea power cables consisted of separate cables for each conductor in order to be compatible with trucking all materials to the remote site.

The dual fiber optic communications cables were utilized with a distributed temperature sensing system to monitor the flowline burial conditions and supplement the multiple flowline leak detection systems. The flowlines traverse very rough seabed terrain, including an escarpment along the selected route. It was determined from preliminary analysis of the surveyed flowline route and confirmed with as-laid flowline survey data that seabed intervention by use of engineered supports was required at some of the flowline spans, including the escarpment.

In particular, at the escarpment it was determined that operating loads during start-up would create excessive bending at the sagbend due to feed-in and overbend due to uplift , exceeding the DNV OS-F code-specified limitstate design requirements. The focus of the K2 free span remediation studies was to assess the impact of span supports and overburden with regard to the structural integrity of the flowlines.

This was accomplished with a global expansion, bottom roughness and lateral buckling analysis. During the course of construction, contingencies for span support were investigated as adjustments had to be made to the construction schedule in order to meet the hydrotest timeframe and First Oil milestone dates. The results of the analyses were verified with as-built start-up survey data, including confirmation of lateral buckling within the monitoring stations identified from the ANSYS analysis.

Home Resources Flowlines. Several types of flowlines are listed below, all subsea unless noted [ Reference 1 ] : Single Tubular: Single, simple tube system onshore or subsea.

Additionally, subsea pipes used for collecting product from deep water production platforms are included in this category. Typical products carried by gathering pipelines include; natural gas, crude oil or combinations of these 2 products , natural gas liquids, such as ethane, butane, and propane.

In a gathering pipeline, raw gas is usually carried at pressures of approximately psi. What size are gathering pipelines? Are gathering pipelines regulated? As newly populated areas are developed, they often overlap into these areas, creating potential safety issues. The definition of a USA is an area that includes a drinking water source or ecological resource area that is unusually sensitive to environmental damage from a hazardous liquid pipeline release.

They are used to move the product from the production regions to distribution centres, Transmission pipelines operate at high pressures, ranging from up to 1, psi, with each transmission line using compressor stations for gas lines and pump stations for crude oil and liquid products. What causes transmission lines to fail?