Britain’s National Grid Electricity Transmission (NGET) is trialing a cast collar designed to seal harmful environmental emissions of Sulphur Hexafluoride (SF6) from small-bore pipework. But that’s just the tip of the pipeline for this 
hard-working casting. 

Developed by Rawwater (Chelshire, UK) using its Molten Metal Manipulation (M3) technology, the M3 CollarCast is suited to onshore, offshore and subsea applications in the oil and gas industry, as well as sealing leaks in civil structures and industrial pipelines, or in customized solutions for the nuclear industry.

The collar—intended to be a superior alternative to cement for plugging and abandonment—is made from molten bismuth alloys, and the company says it’s the world’s first anticipated 3,000-year-life underwater cast metal seal. It’s certified by Bureau Veritas as fit for purpose for extreme life applications in the oil and gas industry and qualified to the VO (highest rating) of ISO 14310.