A tubing is a component for fixing underground structures such as mine shafts, tunnels, and so on.
The tubings manufactured by Metallist JSC are made of cast iron SCH-20. They can also be made of other materials.
The tubings are separate tunnel ring segments. Each ring consists of a basic segment, two adjoining segments, and a few normal segments. The rings are connected together thus making up a segmental lining.
In particular, the tubings are used in mining industry for the construction of mines, tunnels, and underground railroads.