Transcription of Welding Pressure Pipeliners and Piping Systems
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Welding Pressure Pipeliners and Piping Systems
Welding Pressure . PIPELINES &. Piping Systems . Procedures and Techniques Table of Contents Introduction ..3. Vertical Down vs. Vertical Up ..3-4. Cross Country Pipeline-Vertical Down Welding Joint Preparation ..4. Pipe End Cleaning ..4-5. Welding the Root Pass ..5-6. Current Settings w/Lincoln Engine Driven Welders .6-7. Root Pass Welding ..7. Root Pass Troubleshooting ..7. Techniques for Welding Hot Pass ..8. Techniques for Welding Fill and Cap ..8. Setting the Current etc..8-9. Preventing Cracking ..10. Techniques for X60 etc..10-11.
With low hydrogen vertical up electrodes, welds may be made virtu-ally free of slag entrapment and porosity. These welds are best able to meet strict radiographic requirements for high pressure, high tem-
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