Tubular assembly having an internal plug

摘要: A tubular assembly which includes a first (or outer) tube (12), second inner) (21) and plug (42) within the is described. The resides at least portion of (21), itself (12). (12) (21 ) tubes each have perforations (15, 24), some are aligned. has cavities (45) in its exterior surface (48), aligned with (36). Plastic material (e.g., thermoplastic material) molded through (36) partially fills (45). edges (39) embedded plastic (53) therethrough. extending (36), into embedding perforation therein, serves to fixedly attach together.