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Tube coils in a radiant section of an ethylene cracking furnace are subject to corrosion. Repair welding of these tube coils is difficult. A degraded tube section is replaced by welding in a virgin tube section. The current paper presents the test results of a weld joint between a service-exposed tube and virgin tube using automatic orbital and manual gas-tungsten-arc welding (GTAW) processes.
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The effect of back shielding gas types and contained oxygen level on the corrosion resistance of welds was investigated for gas tungsten arc welding (GTAW) of UNS S32750 super duplex stainless steel (SDSS) pipes.
Guidelines to prevent most forms of environmental cracking of weldments in carbon steel refinery equipment and piping. Processes covered: SMAW, GMAW, FCAW, GTAW, SAW.