Gas injection system | Last manifolds completed in China Contractors to the Chinese Domestic Agency have completed an important part of the gas injection system—the distribution manifolds that carry gas species from the tritium plant to the ITER machine and back for processing. Members of ITER's Fuelling & Wall Conditioning Section inspect a batch of gas injection manifolds from China in June 2020. Manufacturing is now complete and the last batches will be shipped from China.Think of them as service pipes, with important added characteristics to meet ITER's strict regulations for protection-important components*. Inside of a large guard pipe, six process lines for gas going toward the plasma surround a central evacuation pipe that transports exhaust gases back to the tritium plant. In the interspace is an inert gas (nitrogen) flowing toward tritium plant, where any leaks from the process pipes can be detected.