Argon Purging 

Argon purging is a proven process that enhances weld quality by decreasing-or even preventing-oxidation. This, in turn, maintains the corrosion resistance of parent materials, ultimately reducing leak rates in finished product.
Penflex CWI, CWE and NDT Examiner Dave Gregor lays out the visual cues which signal whether a weld was purged or not. These cues will enable users to better asses metal hose.
More details are available at www.penflex.co....