What are 4 variables that afrect whether or not a tube design works?

Four key variables that affect whether a tube design works are material properties, diameter and length, wall thickness, and internal pressure. The material must provide sufficient strength and flexibility for the intended application, while the diameter and length influence flow characteristics and structural integrity. Wall thickness impacts the tube's ability to withstand internal pressures and external forces. Additionally, the design must account for any environmental factors that may affect performance, such as temperature and corrosion resistance.