Pickled and Oiled pipe

[MarineGreg]

Hello all.

What is the process of pickling and oiling steel pipe?
And what are the advantages?

Thanks.

 

[kenvlach]

Pickling is using an acid solution to remove oxide (mill scale, welding & heat treatment scale, rust).
Usually done in either hot sulfuric or slightly heated hydrochloric acid solutions containing inhibitor. Easier than mechanical methods if both inside & outside of pipe must be cleaned.

Oiling is temporary protection from rusting.