A study was made of the weldability of five HSLA pipeline steels, with particular reference to transverse and longitudinal underbead cracking. The steels studied had a range of chemical compositions, microstructure, wall thicknesses and pipe…
A report that summarizes the field studies conducted as part of the Hydrogren-Stress-Cracking Phase of the NG-18 Research Program. These studies involve the evaluation of the sensitivity of pressurized high-strength steel pipe sections to hydrogen…
Cranfield Institute of TechnologyReports on the investigation undertaken into the effect of pressure on problems related to weld metal hydrogen levels encountered in SMAW. Emphasis has been placed on examining the influence of welding polarity and…
This report describes an investigation of the susceptibilities of high-strength controlled-rolled line pipe steels to hydrogen stress cracking (HSC) and the effect of long-term cathodic charging with hydrogen on their mechanical properties. Studies…
Hydrogen-stress cracking (HSC) has occurred in natural gas transmission pipelines only in localized hard regions in the pipe wall (hard spots) or in hard weld zones. A specific factor that results in the initiation of HSCs in some hard spots is the…