Global gas infrastructure expansion: where pipelines are being built and what it means for inspection

Gas infrastructure is in a strange, consequential decade: it is simultaneously one of the fastest-growing categories of energy infrastructure on earth and one of the most scrutinised - expanding across Asia and the LNG corridors while its mature networks in the West age into their most maintenance-hungry years, all under emissions rules that keep tightening. Every one of those trends, independently, increases demand for inspection. Together, they define the market.

Asia: the volume story#

The largest concentration of new pipeline kilometres is Asian. India is the sharpest single example - a national push to raise gas's share of the energy mix, an expanding transmission grid, and the City Gas Distribution build-out extending authorised coverage across most of the country's population - but the pattern repeats regionally: China's continued transmission and distribution growth, Southeast Asian network development, and new import infrastructure throughout. These are young networks being built at speed, which makes their integrity question less about accumulated corrosion and more about construction quality, records discipline, and third-party damage in rapidly urbanising corridors - threats that demand frequent surface observation from day one.

LNG: infrastructure that anchors more infrastructure#

The global expansion of LNG trade - new liquefaction capacity, new import terminals, new regasification - is quietly also a pipeline construction program, because every terminal is anchored to pipe: feed-gas lines into liquefaction on the export side, high-capacity send-out transmission on the import side. These lines tend to be born into the strictest inspection categories - large diameter, high pressure, coastal and industrial siting - meaning LNG growth adds disproportionately high-consequence kilometres to the global inspection workload.

The mature networks: ageing is an inspection multiplier#

Meanwhile the world's oldest large networks - North America's and Europe's, with major mileage dating to the 1950s-1980s - are entering the decades where integrity effort per kilometre rises structurally: coating systems reaching end of life, legacy seam and manufacturing features becoming active threat categories, and failure statistics keeping regulatory attention high. New networks add kilometres to watch; ageing networks raise the watching intensity every existing kilometre requires. The two trends compound into the same conclusion from opposite directions.

Europe and the transition: hydrogen and repurposing#

Europe's distinctive contribution to the trend is specification: a growing share of new construction is hydrogen-ready, and large-scale assessments are underway on repurposing existing gas corridors for hydrogen service. Both paths are integrity-intensive - readiness assessment is fundamentally an inspection-and-records exercise, and hydrogen service tightens the tolerances that matter, as covered in hydrogen pipelines and integrity. The transition does not retire the integrity discipline; it re-tasks it.

The common denominator: the inspection gap#

Add the columns - young networks needing baseline surveillance at build-out speed, LNG corridors adding high-consequence mileage, mature networks demanding rising per-kilometre effort, methane rules converting estimated emissions into measured ones - and the sum is a widening global gap between pipe that needs watching and inspection capacity available to watch it. Closing that gap by scaling traditional methods alone would mean scaling headcount and survey hours linearly with kilometres, which no operator's budget supports. That arithmetic, more than any single technology's appeal, is why inspection is shifting toward the pattern described in where pipeline inspection is heading: frequent, cheap, wide observation layered over precise, targeted follow-up - with the decision layer in between doing the prioritising.

Related reading#

For the inspection-method consequences of this build-out, see where pipeline inspection is heading; for the sharpest single national example, see India's CGD expansion.