When examining nick breaks after the specimen is broken, I have encountered shiney spots in the weld metal. It isn't slag, non fusion, porosity, or fish eyes. I've been told by a welding engeneer that it was brittle fracture but would like other opinions. Several welding inspectors I have...
Why are arc burns removed from pipelines during construction or maintenance welding? As a pipeline welder for forty years, I have yet to get an answer from inspectors or engeneers that any two people are in agreement. It seems that about 90% of the Gas Transmission Companys have no arc burn...
In the natural gas pipeline industry, it's fairly common to weld branch connections to live lines while flowing gas. The joint configuration we use is in API-1104. The electrodes normally used for live line welding are E-7018. Take a look at all of this then consult a welding engineer with...
