Fluid conduit systems and methods for making

Through strong metal tube cylindrical outer surface and thermoplastic layer of multiple hydraulic transmission pipe. The outer layer is sealed through of the sleeve part of thermosplastic plastic pipe connector, strong of the connection end of multiple sleeve the leakage oil pipe. Around the fire protection system, preferably a metal is the steel, preferably a thermoplastic is CPVC; the preferably heating) and activation. And the preheating cover bond's metal pipe, cushion CPVC to the surface. Through is anti-flaming CPVC, the invention's multiple water capable of the has a serious an area, wherein compatibility relative the existing plastic pipeline. At the scene, direct and normal the plastic pipe is connected with the cutting and is corresponding connected by using the carrier, has easy to inside the casing pipe of the water system.