... and subsequent operation of the sleeves is needed. This research aims to conduct thermo-mechanical evaluations of Type-A compression sleeves, which are notable for their absence of end fillet welds. We utilize finite element (FE) analysis with the intention of providing insight into the reliability assessment...

... km, natural gas transmission pipeline shall be repurposed and operated with hydrogen. Mechanical testing of pipeline material, seam and girth welds in air and pressurized, gaseous hydrogen is underway to inform the development of repurposing standards. Full-scale burst testing of defects has been...

... worldwide. However, pipelines require frequent maintenance and repair work. As part of these, in some cases it is necessary to do weldments onto pipelines while they are pressurized. This in-service welding introduces additional challenges for the material compatibility. Due to the resulting high...

... Abstract The objective of the recently completed Phase 1 of a joint industry project (JIP) at DNV, the results of which are described in this paper, was to determine if welding onto an in-service pipeline that transports a mixture of methane and hydrogen results in an increased risk of hydrogen...

... Abstract The current preference of regulators in the United States and Canada is to require a delay time prior to nondestructive examination (NDE) of welds for cracking; for both welds made manually during construction of new pipelines and during maintenance activities for existing pipelines...

...Proceedings of the 2022 14th International Pipeline Conference IPC2022 September 26-30, 2022, Calgary, Alberta, Canada IPC2022-87297 DETECTION AND MITIGATION OF COPPER CONTAMINATION IN MECHANIZED ONSHORE PIPELINE GIRTH WELDS Kenneth Lee1, Paul Spielbauer2, David Culbertson3, Bob Huntley4 1DNV...

... Abstract Recent girth weld failures in newly constructed pipelines in North America have highlighted the issue of the weld strength undermatching the actual pipe strength. The lowest strength region of a manual girth weld is usually the root pass. This project evaluated using higher strength...

... Abstract Some 10 incidents of low strain in-service and pre-service hydrotest failures in girth welds have been reported in North America since the Enterprise Products ethane pipeline failure in 2015. No such failures have been reported in Australia, despite the similarities in Standards...

... Abstract Field experience on pipelines suggests that under the unique conditions of tie-in welding, a high-low offset at the inner pipe wall is related to an increased occurrence of latent root weld discontinuities such as cold cracking. Codes and standards offer conflicting and unclear...

... of the mainline welding process, where a high productivity system was used. Mainline welding on X100 pipe was accomplished using a single tandem wire GMAW system offered by Serimax. Tie-in and fabrication welding was accomplished using vertical-down STT root pass and a vertical-up mechanised FCAW system...

... 10 12 2008 A technique for sub-sea pipeline repair using remote welding without the use of diverse has been developed. The technique involves the installation of an oversized pipe segment (sleeve) over the join by threading the pipe ends through the sleeve and performing a sub-sea...

... 10 12 2008 The hyperbaric GMA welding procedure development carried out for underwater pipeline repair using a fillet welded sleeve is described. The fillet welded sleeve for repair offers greater alignment and installation tolerances than those associated with V-butt welding...