Underground Bunker C (No. 6) Piping design 2

[Comen Larocque]

I am trying to replace a Bunker C line that is buried
Questions:
1- Applicable design standards and codes?
2- Insulation type and details
3- Corrosion and cathodic protection
4- Trench design consideration references.

Thanks.

 

[LittleInch]

1 ASME B31.3 is a good as it gets
2 Some sort of closed cell, so Foam Glas or PU foam
3 High quality factory applied FBE or similar. CP doesn't work on insulated lines.
4. Eh? Dig a hole. Put the pipe in. Put the soil back.

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

 

[EdStainless]

4. Any crossings or surface loads? That would take some design work.
Often people use special fill, or at least fill with no rocks in it to prevent damage to the insulation and coatings.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[1503-44]

Design your pipe to B31.3, assuming it's all on company property, then refer to B31.4 for helpful hints related to other concerns typical of buried pipelines.

--Einstein gave the same test to students every year. When asked why he would do something like that, "Because the answers had changed."

 

[MJCronin]

Ok, my two cents on Bunker fuel piping replacement ...

1) --- Decide on your piping joint type and how much your client wants to spend. (I am assuming <3" NPS, here) Threaded/screwed piping systems alone not good. Might want a seal welded thk joing. Propritary couplings ?

2) --- Would the client or local municipality require a "double pipe" configuration to protect against spills ?
(PERMAPIPE is one vendor who sells complete systems

https://www.permapipe.com/)

3) --- My PA experience with Bunker Fuel has been that slugs of water can freeze and play havoc in the winter months. (
(splitting the pipe) ... Does the client regquire this, because you gotta know up front !!

4) --- Carbon Steel, A53 - Gr B or similar... Sched 80 ... should be suitable... as I recollect

Where will this UG ssytem be located and is it subject to freezing ??

MJCronin
Sr. Process Engineer