The objective of this work was to validate the use of post-heating as an alternative to the delay time prior to NDE and develop guidance for the application of post-heat. Allowing hydrogen to quickly diffuse away significantly reduces the probability…
Gas Technology Institute (GTI) and Edison Welding Institute (EWI) created both laboratory and infield girth weld samples to evaluate the effects of weld geometry and hydrogen off-gassing on the performance of protective coatings. Laboratory-made…
The application of requirements contained in many industry codes and standards requires some interpretation by the user and by the regulator who is called upon to enforce their use. The objective of this project was to update the PRCI guidance…
This technical bulletin was developed in response to a significant number of manual girth weld failures in newly constructed pipelines. These failures are associated with some systemic deficiencies in current practices, and thus require immediate…
A study of the properties of weld heat-affected zones in steel plate designed for marine service at low temperatures. This report includes the examination of two steels suitable for marine service. The main differences between the two steels are in…
This project was initiated to support a methodology for conducting an engineering assessment to determine the tolerable dimensions of flaw indications at full encirclement repair sleeve welds. The work described herein has been undertaken to validate…
This project evaluated using higher strength E8010 electrodes for root pass welding on modern X70 strength line pipe, as part of a solution to increase overall weld strength, to match or overmatch the actual strength of the line pipe. The…
This Milestone Deliverable M02-T04 is draft guidance for the application of higher strength E8010 electrodes for root pass welding. The guidance discusses E8010 root pass weldability, operability, and productivity, and provides recommended…
Describes the fracture properties of weldments in line pipe steels. Static and dynamic toughness of the heat-affected-zone are reported and their relationship to heat input and microstructure.