Conduits for transporting fluids and methods of fabricating the same

A method (300) of fabricating a conduit (100), the method (300) comprising steps of:

• attaching a first tubular-outboard-ply end (149) of a tubular outboard ply (113) to a first inner collar portion (106) of a first collar (102) with a second weld (134);
• attaching a second tubular-outboard-ply end (147) of the tubular outboard ply (113), which is axially opposite the first tubular-outboard-ply end (149) of the tubular outboard ply (113), to a second inner collar portion (107) of a second collar (103) with a fourth weld (184);
• inserting a tubular inboard ply (111) into the tubular outboard ply (113) and advancing the tubular inboard ply (111) along an interior of the tubular outboard ply (113) until a first tubular-inboard-ply end (157) of the tubular inboard ply (111) protrudes a first distance (D1) past the first inner collar portion (106), and a second tubular-inboard-ply end (159) protrudes a second distance (D2) past the second inner collar portion (107), and wherein the first distance (D1) is greater than a first predetermined distance (PD1) and the second distance (D2) is greater than a second predetermined distance (PD1);
• simultaneously corrugating the tubular inboard ply (111) and the tubular outboard ply (113) to form a bellows (108), having a central axis (180) and comprising a corrugated outboard ply (112), a corrugated inboard ply (110), and an interstitial space (126), interposed between the corrugated inboard ply (110) and the corrugated outboard ply (112), and wherein the corrugated outboard ply (112) is formed from the tubular outboard ply (113), and the corrugated inboard ply (110) is formed from the tubular inboard ply (111);
• trimming a first corrugated-inboard-ply end (151) of the corrugated inboard ply (110), corresponding to the first tubular-inboard-ply end (157) of the tubular inboard ply (111), to create a trimmed first corrugated-inboard-ply end (156) that protrudes the first predetermined distance (PD1) past the first inner collar portion (106);
• trimming a second corrugated-inboard-ply end (153) of the corrugated inboard ply (110), corresponding to the second tubular-inboard-ply end (159) of the tubular inboard ply (111), to create a trimmed second corrugated-inboard-ply end (170) that protrudes the second predetermined distance (PD2) past the second inner collar portion (107);
• threadably interconnecting the first inner collar portion (106) and a first outer collar portion (104) of the first collar (102);
• threadably interconnecting the second inner collar portion (107) and a second outer collar portion (105) of the second collar (103);
• attaching the trimmed first corrugated-inboard-ply end (156) of the corrugated inboard ply (110) to the first outer collar portion (104) with a first weld (138);
• attaching the trimmed second corrugated-inboard-ply end (170) of the corrugated inboard ply (110) to the second outer collar portion (105) with a third weld (186);
• and
• communicatively coupling a first sensor (116) with the interstitial space (126).