Internally FBE lining and OLET

[McDermott1711]

Hi everybody,
I was wondering how branching will be taken place on a pipeline with internally FBE lining for say pressure gauge mounting, without damaging to the lining. Your contribution will be highly appreciated.


Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has. Rene Descartes

 

[LittleInch]

You need to attach these before the lining is applied.

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[McDermott1711]

You need to attach these before the lining is applied.

But, pipes are lined(coated) by pipe vendor in his/her manufacturing plant and supplied to the site as 12m pieces and will be drilled at shop based on the location of the branch.

Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has. Rene Descartes

 

[MickMc]

IMO your vendor will have a minimum size including branch which he can FBE line say 3" flanged branch and from there you will probably have to use reducing fittings in suitable corrosion resistant alloy to get to size you require.

 

[McDermott1711]

Thank you all for your replies.

Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has. Rene Descartes

 

[LittleInch]

Well internally lining pipe before you attach anything will damage the internal coating. That's one of the down sides.

How are you attaching anything else? - flanges, tees, elbows etc?

For smaller items you might get away with a screwed connection, but depends on wall thickness.

Access to the internal coating?

Internal lining has its uses but if you've got something particularly corrosive, it may not be the best long term choice. Why is this stuff lined?



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[McDermott1711]

Sorry LittleInch for delay in response.

How are you attaching anything else? - flanges, tees, elbows etc?

By welding

Access to the internal coating?

Don't know at this stage.

Why is this stuff lined?

CO2 and H2S corrosion of crude oil.

Client requested for internally coated FBE (min. 600 micron) and at the same time the material of pipe shall be NACE MR 0175 compliant. Have you ever encountered with NACE MR 0175 pipe with internal coating?


Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has. Rene Descartes

 

[LittleInch]

So if you're welding on the flanges or one pipe to the next one, how are you repairing the coating at the weld?

The NACE is for the H2S and I assume the lining is to prevent corrosion from the CO2.

I don't much like internal lining like this for corrosion protection if the potential corrosion rate is very high. Too many chances that the coating will have gaps or become damaged over time.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[McDermott1711]

So if you're welding on the flanges or one pipe to the next one, how are you repairing the coating at the weld?

By special remote controlled robot.

Link

I've no experience on using this kind of coating and just found it from youtube.

Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has. Rene Descartes