| 摘要 |
<p>A method for forming laminated pipe and tubing including the providing of a first seamless inner tube (16, 31, 41), placing of an outer tube (12, 42) about the inner tube by first longitudinally slitting the outer tube to facilitate engagement therewith and forming an elongated gap between a pair of parallel edges. The gap is filled by welding or brazing material (25, 56) which, upon cooling, radially shrinks the outer tube upon the inner tube to place the abutting surfaces in intermittent contact for heat transfer and/or increased strength. To prevent actual fusing of the inner and outer pipes or tubes, a thin metal shim (26, 63) is provided to prevent contact of the welding or brazing material from flowing to the inner tube.</p> |
