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  1. sapipeliner

    Lincoln STT Welding Process

    Hello, Has anyone had experience using Lincoln's STT process in the pipelining field? How easy is it to use in open air conditions, in the mud etc. Lincoln rep did demo for us today, but in workshop conditions. Was very impressed with speed, weld finish as welded, but am a bit worried if sound...
  2. sapipeliner

    API 1104 Fillet Welds

    Hello, We have a PQR qualified by destructive testing for a 1118mm O/D x 7.2 mm W/T API 5L X42 pipe butt weld. Pipe welded in 5G position. I have drawn up a WPS for butt welds from this PQR, using ranges as per API 1104 (diameter and thickness). First question is : How do I determine ranges for...

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