Material selection for hydrogen pipelines in transmission networks, offshore and onshore, remains a topic of intense debate. Existing design codes exist but are considered conservative. These design codes are being challenged and some replaced with new code language. Such updated code language is already in circulation for commenting. Some upcoming design codes suggest a conservative approaches to ensure safety. Current approach is to run hydrogen pipelines at low utilizations or with limited pressure fluctuations, or both. While testing remains limited, some test results do suggest that allowable crack/defect size should not impose practical limits when following modern requirements to line pipe. In this paper the state-of-the-art knowledge will be described based on extensive literature review and testing results. It will be suggested that the future hydrogen pipelines will be physically identical to modern natural gas pipelines and while some limitations on utilization and pressure fluctuations are likely to remain for some time, as experience grows and test results from particularly full-scale tests appear, this will not be a major cost driver for designing, building and operating hydrogen transmission networks compared to natural gas transmission systems. This paper is intended to facilitate a constructive dialogue as we converge on the design requirements for hydrogen pipelines, including the material selection for such application.