This tends to compromise the strength and integrity in the joint. To forestall porosity, clear away the zinc coating in the weld location. Whilst galvanized pipe is recognized for its use in design, its rust-protective coating causes it to be a preferable steel selection for precision automotive, plumbing, and structural https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html