| 摘要 |
The invention relates to a sleeve (1) for covering wiring and piping indicated for gas conduits. The sleeve comprises a layer (2) made of a material that is highly fire-resistant and highly impermeable to gas. Preferably, the layer (2) is made of polyurethane and has a thickness comprised between 10 % and 100 % of the total thickness of the sleeve (1). |
