CPC F16L 13/02 (2013.01) [F16L 13/007 (2013.01); F25B 41/40 (2021.01)] | 17 Claims |
1. A pipeline assembly, comprising:
a first steel pipe;
a second steel pipe;
a first copper sleeve; and
a second copper sleeve,
wherein the first copper sleeve is fixed on an end of the first steel pipe and comprises a first section sheathing a periphery of the first steel pipe and a second section extending beyond the end of the first steel pipe, the second copper sleeve is fixed on an end of the second steel pipe and sheathes a periphery of the second steel pipe, the second section sheathes at least part of the second copper sleeve by welding;
wherein the second copper sleeve comprises a third section and a fourth section, wherein a periphery of the third section is sheathed by the second section, and the fourth section is exposed to an outside;
wherein the fourth section has a length L1 along an axial direction of the second copper sleeve, wherein 5 mm≤L1≤30 mm;
wherein the first copper sleeve has a pipe wall thickness t1, the second copper sleeve has a pipe wall thickness t2, 1 mm≤t1≤2 mm, 0.3 mm≤t2≤0.8 mm, and the pipe wall thickness t1 is larger than the pipe wall thickness t2.
|