High temperature resistant fire -retardant double -wall pipe

The utility model relates to a double -wall pipe field, concretely relates to high temperature resistant fire -retardant double -wall pipe, high temperature resistant fire -retardant double -wall pipe, including thickness than being 1: 3 inlayer hot -melt adhesive layer and outer PE pyrocondensation layer, still including roll up locate all outer PE pyrocondensation layers outside with double -deck crowded form altogether extrude the insulating inlayer of radiation cross -linking with do not have the steamed low fire -retardant radiation cross -linking of cigarette insulating outer, still including bonding in insulating outer outside oxygen layer, insulating layer and the EPT rubber restrictive coating of separating. The utility model discloses the high temperature resistance ability is good, fire behaviour is good, long service life. 本实用新型涉及双壁管领域，具体涉及种耐高温阻燃双壁管，耐高温阻燃双壁管，包括厚度比为1:3的内层热熔胶层和外层PE热缩层，还包括卷设于所有外层PE热缩层外部的用双层共挤形式挤出有辐照交联绝缘内层和无卤低烟阻燃辐照交联绝缘外层、还包括粘接于绝缘外层外部的隔氧层、隔热层和三元乙丙橡胶护套层。本实用新型耐高温性能好、阻燃性能好、使用寿命长。