Final answer:
Nonel tubing consists of two types: shock tube for explosive initiation in industries like mining, and signal tube for creating visual signals in construction or surveying.
Step-by-step explanation:
Two types of Nonel tubing available are shock tube and signal tube. Shock tube, also known as Nonel, is used in mining, construction, and quarrying for the initiation of explosives, where safety and reliability are paramount. It is a small-diameter, hollow plastic tube filled with a minimal amount of reactive powder that, when ignited, sends a shock wave along the length of the tube to detonate a blast cap or explosive. Signal tube, on the other hand, is typically used for non-destructive applications such as creating visible signals for communication or measurement purposes during construction or surveying activities. Signal tubes are often filled with coloured smoke or pyrotechnic compounds to create visible signals.