Method for manufacturing a metallic tubular assembly

A method for manufacturing a metallic tubular assembly comprising the steps of:

• a) obtaining a substantially-straight first tube;
• b) obtaining a first tubular connector having a first end portion and a second end portion;
• c) after steps a) and b), annularly metallurgically attaching the first end portion to the first tube;
• d) after step c), changing the shape of the first tube;
• e) obtaining a substantially-straight tubular member having a third end portion, wherein at least one of the second and third end portions includes an annular outward fold, and wherein the fold includes spaced-apart first and second fold portions;
• f) after steps a) through e), disposing the first tubular connector and the tubular member with the second end portion aligned with and contacting the third end portion;
• and
• g) after step f), creating a resistance welding current path through the first tubular connector and the tubular member proximate the second and third end portions and relatively and deformingly moving together the second and third end portions creating an annular weld zone which includes at least some of the second and third end portions.

A method for manufacturing a metallic tubular assembly comprising the steps of:

• a) obtaining a first tube;
• b) obtaining a first tubular connector having a first end portion and a second end portion;
• c) after steps a) and b), annularly metallurgically attaching the first end portion to the first tube;
• d) obtaining a second tube;
• e) obtaining a second tubular connector having a third end portion and a fourth end portion, wherein at least one of the second and third end portions includes an annular outward fold, and wherein the fold includes spaced-apart first and second fold portions;
• f) after steps d) and e), annularly metallurgically attaching the fourth end portion to the second tube;
• g) after steps a) through f), disposing the first tubular connector and the second tubular connector with the second end portion aligned with and contacting the third end portion;
• and
• h) after step g), creating a resistance welding current path through the first and second tubular connectors proximate the second and third end portions and relatively and deformingly moving together the second and third end portions creating an annular weld zone which includes at least some of the second and third end portions.