Pipeline transporting Naphta and jet fuel

[MMED]

Hi

We have tow pipelines of 500 meter transporting NAPHTA and Jet Fuel were initially underground and after several years of operations we are planning to replace them due to corrosion. My question is if we change them to above ground , is there any risk or restriction that may affect its operation? Please advise if there's any referneces or standard that clarify this?

Best Regards

 

[LittleInch]

In general, above ground lines would fall under piping or B31.3 as the pipeline codes don't really like above ground lines.

Risk levels are usually higher due to the issue of damage, corrosion (can't use CP), thermal movement requiring expansion loops for a 500m run, increase in operating temperature due to solar gain and hence higher static pressures / decrease in operating temperature in winter / very cold leading to increased viscosity, possible vacuum conditions etc.

But each to their own. There are many standards to tell you how to do, but they will not tell you what to do - that's your choice when considering all the issues.

Your risk contours will be higher as there is a higher chance of impact damage and corrosion for above ground lines. Also jet fire radius will be bigger as a sideways jet will go further than if it is in a hole in the ground.

 

[shvet]

... is there ... ? ...

where?
what jurisdiction is this pipeline located in?
why chemical forum? what's wrong with the pipeline or petro forum?

 

[MMED]

In general, above ground lines would fall under piping or B31.3 as the pipeline codes don't really like above ground lines.

Risk levels are usually higher due to the issue of damage, corrosion (can't use CP), thermal movement requiring expansion loops for a 500m run, increase in operating temperature due to solar gain and hence higher static pressures / decrease in operating temperature in winter / very cold leading to increased viscosity, possible vacuum conditions etc.

But each to their own. There are many standards to tell you what to do, but they will not tell you what to do - that's your choice when considering all the issues.

Your risk contours will be higher as there is a higher chance of impact damage and corrosion for above ground lines. Also jet fire radius will be bigger as a sideways jet will go further than if it is in a hole in the ground.

Hi

Thank you very much for your feedback on this. Much appreciated.