This could compromise the strength and integrity in the joint. To forestall porosity, take out the zinc coating in the weld location. Put a coupling bolt on Each individual bolt hole and tighten the coupling bolts utilizing a wrench or socket wrench. Assure to tighten the bolts evenly. No matter https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html