The two-layer ELCOR pipe is an electrical pipe manufactured at the TehnoWorld plant in Romania. The corrugation is used for the construction of underground cable sewage. Protective double-walled pipes are designed for the organization of information, signal and communication networks. The corrugated outer wall creates additional rigidity and flexibility of the pipeline, while the inner smooth wall simplifies cable entry. With the double wall corrugation ELCOR there is a coupling and a broach.