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With my colleagues we were wondering which kind of standards and formulas we should use to verify the resistance of an offshore pipeline to local buckling – collapse in case of metal losses. As you know ASME B31.G is related to corroded pipeline for which bursting is the governing loads and...

Hi, ASME 31.8 location class 4 and ISO 13623 location class 5 have the same definition that states "when four building are prevalent and heavy traffic is present and undergdound facilities are present". Is anybody aware of references where these three requirements are stated to be present at the...

Hi, ASME 31.8 location class 4 and ISO 13623 location class 5 have the same definition that states "when four building are prevalent and heavy traffic is present and undergdound facilities are present". Is anybody aware of references where these three requirements are stated to be present at the...

Is anybody aware of any requirements for fugitive emission test for ball valves to be installed subsea? Are the requirements set in ISO 15848-1 applicable also for subsea valves?

Pipe in Pipe is the technology that include an inner pipe + insulation + carrier outer pipe. Inner pipe is for pressure containement and fluid transportation, while insulation and outer pipe are used to reduce heat exchanges for deep water application. As far as i know, PiP maximum size is 14"OD...

Hi, what is the biggest size of Pipe in Pipe currently insstalled?

Is anybody aware of limitation in length for flexible flowline to be installed subsea at 1300 water depth? OD shall be around 12". thanks

Hi, i have to select between API 5L X60 and API 5L X65 PSL2 linepipe. Considering the type of fluid to be transported and the design conditions there is no difference between the two in terms of corrosion and wall thickness, what is the most economic? Is X65 cheaper than X60? Thanks

Hi, we have an existing long pipeline (130 Km) currently installed w/o exteranl coating and not buried that need to be heated in order to avoid the cool down of the fluid that has an high pour point. does anybody have any experience of long pipeline heat traced? Is it possible to have a...

Is it possible to use Cesar II software per pipeline stress analysis as an alternative to the most common softwares for such application like Sage, AutoPipe or Abaqus? I always saw Cesar II application on piping. Does anyway have experience on that or list pros and cons? Thanks Filippo

Is there any reference into Asme B31.8 stating the maximum or minimum bending radius for the field bends to be executed into onshore pipeline?

I have been told by our engineering contractor that it is a good engineering practice to consider acceptable all end expansions of onshore pipeline minor than 100 mm. Is there any reference for this kind of values? Is it really a common practice or not?

We need to install an isolation joint to separate the underground pipeline from the above ground plat section. Unfortunately not enough space was considered on the abovegorund section therefore currently one of the possible solution is to install the isolation joint underground. Is there any...

Is anybody aware of any valid onshore pipeline design course available in Europe or in western Asia (e.g. Russia and/or Kazakhstan)? thanks Filippo

Hi, we are installing an high WT 12" pipeline for gas injection (600 bar) with a differential temperature of around 80 degree celsius. To guarantee the compliance with allowed stress values, our engineering contractor is proposing to install the most critical bends into buried concrete pit in...

I need to install thick pipeline in very cold environment (-30C). Longitudinal stress due to thermal expansion (working temperature is 80 degree) is making the overall stress analysis non passing. Therefore we ere thinking to heat the pipeline after laying and before backfilling to reduce the...

Hi, in case i want to execute a river crossing using HDD system, is anybody aware of any limitations on the minimum width of the river to use this technology or it depends only from the elastic bending radius of the pipe? Thanks Filippo

Is anybody aware of any limitation in design pressure for ASME B 31.8 application?

Hi, is anybody aware of the design factor that should be used to verify the thickness of a pipeline in the hydrotest condition, according to ASME B 31.8 code? I usually is a value of 0.95, but i didn't find any actual reference of such value on ASME B31.8

Hi everyone! I'm dealing with a Contractor for the execution of an internal intelligent inspection with a smart pig of a 26" gas pipeline. We agreed to execute such intelligent inspection as baseline for the future pipeline life just after the line hydrotest, when the pipeline is still flooded...