Buried Piping expansion

[saliba11]

Do we need an expansion loop or something else for an insulated direct buried underground CS piping.

Operating temperature is about 100 C.
regards

saliba

 

[pennpiper]

What kind of original soil?
What kind of backfill?
How deep will the line be?
What is the pipe material?

 

[saliba11]

It is a tight soil.

Pipe is about 1 meter under soil.

pipe material is carbon steel api 5LgrB

regards

 

[PaulDBerg]

You can use an externally pressurized joint, shown at

http://www.flexicraft.com/p2.asp?catid=1&subcatid=382.

These can be buried, and take pretty long axial compressions of up to 8".