Tubing Hanger and Packoff Running Tool

[JHWC]

Hi All,

As I check the Engineering Database Standard for the surface product (tubing hanger) in oil and gas, it is stated with the following

Body + ACME thread --> Nitriding + Xylan

Does this mean that the body of the tubing hanger undergo nitriding process while the acme threads undergo xylan coating?

Or both the body and acme threads undergo nitriding and xylan coatings?

Please kindly advise.

Thanks,
Jeffrey