Hydrogen transport pipelines are emerging as a critical element of low-carbon energy infrastructure. While today’s installed base is small compared with natural gas networks, the global hydrogen pipeline market is projected to grow very rapidly from low single-digit or low-teen USD billions in 2025 to many tens of billions by the mid-2030s, with various forecasts indicating high-teens to even higher CAGRs as projects mature. Price trends for hydrogen pipelines reflect technical requirements and market uncertainty. Hydrogen’s small molecule size and potential for embrittlement demand higher-grade steels, careful welding procedures, stricter leak-tightness standards and, in many cases, new compressor and metering technologies.