Repairing damaged hot-deep galvanized pipe

[Hwanii]

Hello!!

I'm working as a piping enginner.
For FW aboveground, galvanized pipes are installed. our procedure to install as follows

1. Cutting and welding pipes to fabricate the spools as per ISOs
2. Make them hot-dip galvanized
3. Install them in the field

When the change of the line is inevitable, we should do the same process once again.
It's wasting time because the entire spool should be re-galvanized.

Is there any way to repair the changed welding joint only in galvanizing such as painting??

 

[TomDOT]

Lots of ways to repair galvanizing, though thermal spray (metallizing) and "hot stick" solder tend to be much more durable than the spray can of zinc paint the hot-dip guys love to use.